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• What "pieces" are needed in order to set up a cluster of physical servers?

  - by Chris Dutrow

  Background: Currently, we use Rackspace cloud servers. We have no intention to stop using them, but would like to look into setting up a cluster of physical servers (probably desktop computers in the $400 range with 8gb memory each) to offset some of our load and work as a secondary, more powerful, less reliable system. To put things in perspective, we can buy comparable desktop computers for the same price as we pay in one month to rent them on Rackspace Cloud. I understand that this is generally a dumb idea. However, in this particular instance, the server cluster is needed for its computation power. It is not mission-critical, it does not host a consumer-facing website, and if it goes down for a day or two, its not really a problem. Currently, we have access to business class verizon fios. If I understand correctly, we can get at least 25 dedicated IP addresses with this service, this should be enough. Requirements: Each server runs Linux Centos 6.3 Some of the servers run Python and execute processes from a task queue (Redis or RabbitMQ) Some of the servers are capable of serving static files and Python driven REST APIs Some of the servers host a Cassandra database cluster One or more of the servers are a Redis database servers One or more of the servers are PostgreSQL servers Questions: What kind of router or switch is needed? We would like the computers to be able to communicate effectively with each other via internal IP addresses. This is especially important for communicating with servers hosting Redis that need to be able to respond to requests very quickly. Are there special switches or routers that need to be used to connect the servers together? Are Desktop computers ok for this? We have found that we are mostly RAM-bottle necked, I understand that some servers have highly superior CPUs, but I'm not sure we need CPU power as much as we need RAM, which is cheap in Desktop computers. Will we have problems with the WIFI cards in the desktops or any other unexpected hardware limitation? What tools should be used to "image" the servers. For example, when we get an installation right for a Redis server or Cassandra node, are there tools that come with Linux Centos 6.3 to image the server to a USB drive or something like that? Or do we need to use some other software for this? What other things are we missing that we should be concerned about? Thanks so much!

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• Slow Memcached: Average 10ms memcached `get`

  - by Chris W.

  We're using Newrelic to measure our Python/Django application performance. Newrelic is reporting that across our system "Memcached" is taking an average of 12ms to respond to commands. Drilling down into the top dozen or so web views (by # of requests) I can see that some Memcache get take up to 30ms; I can't find a single use of Memcache get that returns in less than 10ms. More details on the system architecture: Currently we have four application servers each of which has a memcached member. All four memcached members participate in a memcache cluster. We're running on a cloud hosting provider and all traffic is running across the "internal" network (via "internal" IPs) When I ping from one application server to another the responses are in ~0.5ms Isn't 10ms a slow response time for Memcached? As far as I understand if you think "Memcache is too slow" then "you're doing it wrong". So am I doing it wrong? Here's the output of the memcache-top command: memcache-top v0.7 (default port: 11211, color: on, refresh: 3 seconds) INSTANCE USAGE HIT % CONN TIME EVICT/s GETS/s SETS/s READ/s WRITE/s cache1:11211 37.1% 62.7% 10 5.3ms 0.0 73 9 3958 84.6K cache2:11211 42.4% 60.8% 11 4.4ms 0.0 46 12 3848 62.2K cache3:11211 37.5% 66.5% 12 4.2ms 0.0 75 17 6056 170.4K AVERAGE: 39.0% 63.3% 11 4.6ms 0.0 64 13 4620 105.7K TOTAL: 0.1GB/ 0.4GB 33 13.9ms 0.0 193 38 13.5K 317.2K (ctrl-c to quit.) ** Here is the output of the top command on one machine: ** (Roughly the same on all cluster machines. As you can see there is very low CPU utilization, because these machines only run memcache.) top - 21:48:56 up 1 day, 4:56, 1 user, load average: 0.01, 0.06, 0.05 Tasks: 70 total, 1 running, 69 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.3%st Mem: 501392k total, 424940k used, 76452k free, 66416k buffers Swap: 499996k total, 13064k used, 486932k free, 181168k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 6519 nobody 20 0 384m 74m 880 S 1.0 15.3 18:22.97 memcached 3 root 20 0 0 0 0 S 0.3 0.0 0:38.03 ksoftirqd/0 1 root 20 0 24332 1552 776 S 0.0 0.3 0:00.56 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 4 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0 5 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kworker/u:0 6 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0.0 0.0 0:00.62 watchdog/0 8 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 cpuset 9 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 khelper ...output truncated...

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• XP OEM licensing when reinstalling Windows XP

  - by mindas

  My wife has managed to buy a Dell laptop she was using at her ex-employer that just went bust. The problem with it is the OS (Windows XP) which takes ages to boot and is generally disproportionally slow to the hardware of the machine. So my aim is to sacrifice a day and reinstall it. The problem I am slightly worried about is the licensing/registration/activation hell. Apart from the sticker (with WinXP license key), the laptop has no other paperwork proving this license is legitimate. I believe this was originally an OEM license. Unfortunately, I don't have the the installation CD. This computer also has MS Office installed (which I would like to retain) but it none of MS Office apps would launch due to some obscure error complaining about lack of free disk space (which computer has plenty of). I have absolutely no clue what kind of license this MS Office was. And because the company has gone into the administration, there is no way of getting this information nor installable media. I believe that by buying the hardware I have also acquired the software which I can use as I see fit. Correct me if I'm wrong. Above said, my question would be: What is the easiest way of reinstalling the XP? By easiest I mean avoiding spending my time to prove Microsoft support I've got the right to use the software (insert your computer says noooo joke here) but still being able to get to fresh virgin activated legal state of the XP. I used to work as a sysadmin many years ago so I am not afraid of any technical difficulties. The same question applies to MS Office. I imagine the process would consist of backing up all the data, pulling some bits from the registry and using that on the fresh install. As for reinstall I'd expect to use some sort of OEM Windows repair CD from Dell, right? Are those freely available? My other box (HP) has such a thing and it can't be used on any other brand. I'm sure somebody had to go through this licensing hell and could share his/her tips. Thanks in advance.

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• Encrypted off-site data storage

  - by Dan

  My business has a rather unique problem. We work in China and we want to implement a file server paradigm which does not store any files locally, but rather in a server overseas. Applications would be saved onto our local machines, but data would be loaded directly into memory from the cloud, e.g. I load a docx into word at the beginning of the day, saving periodically to the cloud as I work on it, and turn off my computer at night, with nothing saved locally. Considering recent events, we worry about being raided by the Chinese authorities, and although all our data is encrypted, it would not be hard for the authorities to force us to give up the keys. So the goal is not to have anything compromising physically in China. We have about 20 computers, and we need an authenticated, encrypted connection with this overseas file server. A system with Active-Directory-like permissions would be best, so that only management can read or write to certain files, or workers can only access files that relate to their projects, and to which all access can be cut off should the need arise. The file server itself would also need to be encrypted. And for convenience, it would be nice if this system was integrated with each computer's file explorer (like skydrive or dropbox does, but, again, without saving a copy locally), rather than through a browser. I can't find any solution online. Does anyone know of a service that does this? Otherwise I'll have to do it myself (which kinda sounds fun, but I don't really have the time), and I'm not sure where to start. Amazon maybe. But the protocols that offices would use on their intranet typically aren't encrypted; we need all traffic securely tunneled out of the country. Each computer already has a VPN to a server in California, but I'm unsure whether it would be efficient to pipe file transfers through it. Let me know if anyone has any ideas. And this is my first post; feel free say whether this question is inappropriate/needs to be posted elsewhere.

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• Blank Page: wordpress on nginx+php-fpm

  - by troutwine

  Good day. While this post discusses a similar setup to mine serving blank pages occasionally after having made a successful installation, I am unable to serve anything but blank pages. My setup: Wordpress 3.0.4 nginx 0.8.54 php-fpm 5.3.5 (fpm-fcgi) Arch Linux Configuration Files php-fpm.conf: [global] pid = run/php-fpm/php-fpm.pid error_log = log/php-fpm.log log_level = notice [www] listen = 127.0.0.1:9000 listen.owner = www listen.group = www listen.mode = 0660 user = www group = www pm = dynamic pm.max_children = 50 pm.start_servers = 20 pm.min_spare_servers = 5 pm.max_spare_servers = 35 pm.max_requests = 500 nginx.conf: user www; worker_processes 1; error_log /var/log/nginx/error.log notice; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; gzip on; include /etc/nginx/sites-enabled/*.conf; } /etc/nginx/sites-enabled/blog_sharonrhodes_us.conf: upstream php { server 127.0.0.1:9000; } server { error_log /var/log/nginx/us/sharonrhodes/blog/error.log notice; access_log /var/log/nginx/us/sharonrhodes/blog/access.log; server_name blog.sharonrhodes.us; root /srv/apps/us/sharonrhodes/blog; index index.php; location = /favicon.ico { log_not_found off; access_log off; } location = /robots.txt { allow all; log_not_found off; access_log off; } location / { # This is cool because no php is touched for static content try_files $uri $uri/ /index.php?q=$uri&$args; } location ~ \.php$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini include fastcgi_params; fastcgi_intercept_errors on; fastcgi_pass php; } location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires max; log_not_found off; } }

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• Restart mysql keeping the data

  - by sitonico

  I'm quite new using mysql, so let me know if I'm missing something. I took some holidays, and when I got back to work and I tried to log in phpmyadmin I got a ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2). I never had this problem, so I was browsing to look for a solution. I tried some things, and I'm afraid I touched too much. I couldn't solve the problem, and the I realized that I had some actualizations to be done, and I thought that they may be helpful for mysql. Then I also realized that when I was doing this actualizations first day, they stopped because I had a lack of space, so I restarted then. Then,when the system was configuring mysql, it didn't advance. I waited for a long time and then I just stopped it and restarted the computer. After it, I just tried to uninstall mysql with sudo apt-get remove mysql-server-5.1, and install it again, but it didn't work. Now I have 2 questions: What do you think it is happening? Should I remove mysql completely? What should I do? I'm afraid of losing my databases, is there anyway to recover the data? Thank you very much in advance. -----------EDIT------- These are the messages: alfonso@alfonso-laptop:/$ tail -F /var/log/syslog | grep Feb 15 15:08:01 alfonso-laptop init: mysql post-start process (15192) terminated with status Feb 15 15:08:01 alfonso-laptop init: mysql main process (15263) terminated with status Feb 15 15:08:01 alfonso-laptop init: mysql main process ended, Feb 15 15:08:31 alfonso-laptop init: mysql post-start process (15264) terminated with status Feb 15 15:08:31 alfonso-laptop init: mysql main process (15358) terminated with status Feb 15 15:08:31 alfonso-laptop init: mysql main process ended, Feb 15 15:09:01 alfonso-laptop init: mysql post-start process (15359) terminated with status Feb 15 15:09:01 alfonso-laptop init: mysql main process (15447) terminated with status Feb 15 15:09:01 alfonso-laptop init: mysql main process ended, Feb 15 15:09:32 alfonso-laptop init: mysql post-start process (15448) terminated with status 1 This is the content of error.log-old 110128 13:17:20 [Note] /usr/sbin/mysqld: Normal shutdown 110128 13:17:20 [Note] Event Scheduler: Purging the queue. 0 events 110128 13:17:20 InnoDB: Starting shutdown... 110128 13:17:22 InnoDB: Shutdown completed; log sequence number 0 590872 110128 13:17:22 [Note] /usr/sbin/mysqld: Shutdown complete 110214 2:08:18 [Note] Plugin 'FEDERATED' is disabled. 110214 2:08:19 InnoDB: Started; log sequence number 0 590872 110214 2:08:19 [Note] Event Scheduler: Loaded 0 events 110214 2:08:19 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.41-3ubuntu12.8' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu) -- Some links of similar problems https://bugs.launchpad.net/ubuntu/+source/mysql-dfsg-5.1/+bug/573318 http://www.linuxquestions.org/questions/linux-newbie-8/lamp-install-on-lucid-mysqld-sock-missing-mysql-terminating-status%3D1-853152/ It seems it's a permissions problem... But I don't know which permissions I should change... SOLVED -- mysql error 2002 "cannot connect to socket"

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• How can I prevent an unintentional DDOS running ColdFusion 8 with IIS 6?

  - by Eric Belair

  We had an interesting outage today on one of our client's websites. Out of nowhere, the website was inaccessible. The website runs by itself on a dedicated physical Windows 2000 server (probably overkill, I know, but that's a discussion for a different day). After restarting IIS and ColdFusion Application Service, the problem came back several times. My initial thought was that it was a DNS issue, which happens occasionally - the last time it happened was after Hurricane Sandy when we our ISP was out, and we had to make some network config changes. But, it was not a DNS issue. My second thought was that it was a DDOS attack, but, there's very little reason anyone would want to take this site down. When we called our ISP, the operator on the other end noted that traffic was spiking significantly. As it turned out, the client had unintentionally caused a DDOS on the website, after they FTPed a very large video file, and then mass emailed a link to it. Hundreds of people clicked the link and brought the site to its knees. I am primarily a Website Programmer, but I often have to contribute to server administration at times. Sadly, I'm the resident ColdFusion and IIS expert, but I don't have a lot of experience with this issue. What are some basic steps that I can take to prevent this from happening in the future, since we cannot always control what files the client posts to the website. Here are some ideas I had, but I'm unsure of the impact: Limit the number of connections in IIS. Put media files on a separate server (like an Amazon site, etc.). File requests of this type currently behind a server-script (i.e. /www.site.com/viewFile.cfm?fileId=1424545, where the fileId references a file off the webroot) that logs requests, and pushes the file to the browser using CFCONTENT. I could edit this script to reject requests when they exceed a certain amount in a given time-frame (i.e. a 5MB can be accessed globally 10 times in an hour). This may cause some users frustration, but, if hundreds of users are attempting to view the file, the site is going to crash anyways, as it did today, which is way more frustrating, since there is no "pretty" message explaining why they can't get to the file. I'm open to any suggestions, as I'm continuing my research to report to the CTO with the best options, so that we can put a solution into effect. Thank you.

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• How to stop a random ramp in FCGI Processes Killing the server

  - by Andy Main

  So got the below earlier to day... Around that time the logs show a ramp in processes(600) and associated memory (1.2g), cpu usage load average (80) untill the server gave out. Server had to be hard reset by host as there was no ssh or plesk panel access. Fast CGI is configured as below and is setup for one high use site. As I understand it FcgidMaxProcesses 20 should protect against what happen but has not. I've read many forums with differing answers and references to many different fcgi directives, but have found nothing conclusive. Any one got some definitive answers on how to stop this sort of server process ramping and subsequent server failure? If you need more info let me know. Cheers Andy  /var/log/apache2/error_log [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17650 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17649 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17644 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17643 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17638 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17633 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17627 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17622 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17674 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17673 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17672 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17667 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17666 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17665 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17664 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17659 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17658 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17657 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17656 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VRmFLWEZfR2VBb2M https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VWTcwZEhoV2Fqejg https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VUUtVWWFINHZjZ0U https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VZEVMclh6ZUdaOUE <IfModule mod_fcgid.c> <IfModule !mod_fastcgi.c> AddHandler fcgid-script fcg fcgi fpl </IfModule> FcgidIPCDir /var/lib/apache2/fcgid/sock FcgidProcessTableFile /var/lib/apache2/fcgid/shm FcgidIdleTimeout 40 FcgidProcessLifeTime 30 FcgidMaxProcesses 20 FcgidMaxProcessesPerClass 20 FcgidMinProcessesPerClass 0 FcgidConnectTimeout 30 FcgidIOTimeout 120 FcgidInitialEnv RAILS_ENV production FcgidIdleScanInterval 10 FcgidMaxRequestLen 1073741824 </IfModule>

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• WinXP - Having trouble sharing internet with 3G USB modem via ICS

  - by Carlos Nunez

  all! I've been banging my head against a wall with this issue for a few days now and am hoping someone can help out. I recently signed up for T-Mobile's webConnect 3G/4G service to replace the faltering (and slow) DSL connection in my apartment. The goal was to put the SIM in one of my old phones and use its built-in WLAN tethering feature to share Internet out to rest of my computers. I quickly found out that webConnect-provisioned SIMs do not work with regular smartphones, so I was forced to either buy a 4G-compatible router or tether one of my old laptops to my wireless router and share out that way. I chose the latter, and it's sharpening my inner masochistic self by the day. Here's the setup: GSM USB modem (via hub), ICS host - 10/100 Mbps Ethernet NIC, ICS "guest" - WAN port of my SMC WGBR14N wireless router in bridged mode (i.e. wireless access point). Ideally, this would make my laptop the DHCP server and internet gateway with the WAP giving everyone wireless coverage. I can browse internet on the host laptop fine. However, when clients try to connect, they get a DHCP-assigned IP from the laptop and are able to use the Internet for a few minutes before completely dying. After that happens, they are able to re-associate with the WAP and get IP addresses, but are unable to use Internet or resolve IP addresses until the laptop and router are restarted. If they do get access, it's very, very slow. After running Wireshark on the host machine, it turns out that this is because every TCP connection keeps getting RST. DNS seems to work. I would normally think the firewall is the culprit here, but when it drops packets, it drops them completely. The fact that TCP connections are being ACK'ed by the destination rules that out. Of course, none of the event Log isn't saying anything about what's going on. I also tried disabling power management on the NIC, since that's caused problems in the past; that didn't help either. I finally disabled receive-side scaling as per a Microsoft KB (that applied to Windows Server 2003, SP2) to no avail. I'm thinking of trying it with a different NIC (will be tough; don't have a spare Ethernet NIC around for the laptop), but I'm getting the impression that this simply doesn't work. Can anyone please advise? I apologise for the length of this post; all contributions are much appreciated! -Carlos.

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• How to connect to a Virtualbox guest from the host when network cable unplugged

  - by Greg K

  I'd like to work offline (I'm flying to the US twice this month), to do this I need access to a linux development server. When I work from home I boot a VirtualBox VM and that acts as my dev server for the day (providing Apache, PHP & MySQL to run my server side code). However, I'd like to work with my VM when I'm not connected to a network. I have my Ubuntu VM guest set up with a bridge connection so it can serve HTTP and provide SSH access from inside my local network. I've tried to manually configure my network settings on both Mac OSX (the host) and Ubuntu (the guest) but I can't even ping my own NIC address (127.0.0.1 can, 192.168.21.x I can't) in OS X when I unplug the cable. Manual network settings: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx inet 192.168.21.5 netmask 0xffffff00 broadcast 192.168.21.255 media: autoselect (100baseTX <full-duplex,flow-control>) status: active I can ping localhost fine, as well as my VM (.20) and SSH too. $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes 64 bytes from 192.168.21.5: icmp_seq=0 ttl=64 time=0.085 ms 64 bytes from 192.168.21.5: icmp_seq=1 ttl=64 time=0.102 ms 64 bytes from 192.168.21.5: icmp_seq=2 ttl=64 time=0.100 ms 64 bytes from 192.168.21.5: icmp_seq=3 ttl=64 time=0.094 ms $ ping 192.168.21.20 PING 192.168.21.20 (192.168.21.20): 56 data bytes 64 bytes from 192.168.21.20: icmp_seq=0 ttl=64 time=0.910 ms 64 bytes from 192.168.21.20: icmp_seq=1 ttl=64 time=1.181 ms 64 bytes from 192.168.21.20: icmp_seq=2 ttl=64 time=1.159 ms 64 bytes from 192.168.21.20: icmp_seq=3 ttl=64 time=1.320 ms Network cable unplugged: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx media: autoselect status: inactive $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes ping: sendto: No route to host ping: sendto: No route to host Request timeout for icmp_seq 0 ping: sendto: No route to host Request timeout for icmp_seq 1 Does OS X disable the NIC when the network cable is unplugged? Any way to stop it doing this?

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• open-sshd service withou pam support !! How can I add pam support to sshd? Ubuntu

  - by marc.riera

  Hi, I'm using AD as my user account server with ldap. Most of the servers run with UsePam yes except this one, it has lack of pam support on sshd. root@linserv9:~# ldd /usr/sbin/sshd linux-vdso.so.1 => (0x00007fff621fe000) libutil.so.1 => /lib/libutil.so.1 (0x00007fd759d0b000) libz.so.1 => /usr/lib/libz.so.1 (0x00007fd759af4000) libnsl.so.1 => /lib/libnsl.so.1 (0x00007fd7598db000) libcrypto.so.0.9.8 => /usr/lib/libcrypto.so.0.9.8 (0x00007fd75955b000) libcrypt.so.1 => /lib/libcrypt.so.1 (0x00007fd759323000) libc.so.6 => /lib/libc.so.6 (0x00007fd758fc1000) libdl.so.2 => /lib/libdl.so.2 (0x00007fd758dbd000) /lib64/ld-linux-x86-64.so.2 (0x00007fd759f0e000) I have this packages installed root@linserv9:~# dpkg -l|grep -E 'pam|ssh' ii denyhosts 2.6-2.1 an utility to help sys admins thwart ssh hac ii libpam-modules 0.99.7.1-5ubuntu6.1 Pluggable Authentication Modules for PAM ii libpam-runtime 0.99.7.1-5ubuntu6.1 Runtime support for the PAM library ii libpam-ssh 1.91.0-9.2 enable SSO behavior for ssh and pam ii libpam0g 0.99.7.1-5ubuntu6.1 Pluggable Authentication Modules library ii libpam0g-dev 0.99.7.1-5ubuntu6.1 Development files for PAM ii openssh-blacklist 0.1-1ubuntu0.8.04.1 list of blacklisted OpenSSH RSA and DSA keys ii openssh-client 1:4.7p1-8ubuntu1.2 secure shell client, an rlogin/rsh/rcp repla ii openssh-server 1:4.7p1-8ubuntu1.2 secure shell server, an rshd replacement ii quest-openssh 5.2p1_q13-1 Secure shell root@linserv9:~# What I'm doing wrong? thanks. Edit: root@linserv9:~# cat /etc/pam.d/sshd # PAM configuration for the Secure Shell service # Read environment variables from /etc/environment and # /etc/security/pam_env.conf. auth required pam_env.so # [1] # In Debian 4.0 (etch), locale-related environment variables were moved to # /etc/default/locale, so read that as well. auth required pam_env.so envfile=/etc/default/locale # Standard Un*x authentication. @include common-auth # Disallow non-root logins when /etc/nologin exists. account required pam_nologin.so # Uncomment and edit /etc/security/access.conf if you need to set complex # access limits that are hard to express in sshd_config. # account required pam_access.so # Standard Un*x authorization. @include common-account # Standard Un*x session setup and teardown. @include common-session # Print the message of the day upon successful login. session optional pam_motd.so # [1] # Print the status of the user's mailbox upon successful login. session optional pam_mail.so standard noenv # [1] # Set up user limits from /etc/security/limits.conf. session required pam_limits.so # Set up SELinux capabilities (need modified pam) # session required pam_selinux.so multiple # Standard Un*x password updating. @include common-password

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• Forms authentication failed between web server and sql server

  - by Matt Bear

  I've actually found the solution, but I'm trying to understand why it failed, and why my solution fixed the problem. We have an application that uses forms authentication between a web server and sql server, web server runs server 2008, sql server runs 2008 r2, and sql server 2008. In august the sql server was patched with .net 3.5.1, the web server was untouched, and the forms authentication continued to work. 1 week ago we virtualized the web server onto our vSphere server because of failing hardware. Afterwards the form authentication failed with event code 4005, detail code 50201, The ticket supplied was invalid (on the sql server). In fact the sql server started generating Schannel errors and began blue screening 3-4 times a day. At this point I touched the sql server for the first time(ever), the errors were non specific, any reference to them I could find had to do with either zone alarm(which we don't run), or memory errors. So I applied service pack 1, which stopped the blue screening, but did not fix the forms authentication. At this point we had a work around, so we put it on the back burner while we completed another project, and I was able to get back on it last night. First thing was to adjust some code in the webconfig file on the sql server, nothing, next was regenerate and change out the machine key, still no change. Update the DNS servers, no change. Finally I went through and installed all windows updates, two reboots, (over RDP installed a network card driver which failed, and did not have my server room key, that was fun). After that, forms authentication was working again. And the sql server stopped generating as many errors, I've gotten two schannel errors since then. In short, forms authentication began failing when the web server was cloned onto a virtual machine, which caused the sql server to blue sceen? and forms authentication to fail. And could only be fixed by applying patches to the sql server?(I'm wishing I had patched the servers one at a time so I could know for sure which patch on which server fixed it). My question is why did it fail, and why did patching fix it? I hate fixing something without fully understanding the why and how.

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• TomCat starts, but does not load properly

  - by user37136

  Hey guys, I've been working on this for a day now and still don't know what's wrong. I am essentially building a second environment for our web and app server. I got apache to load up just fine, but tomcat is proving to be difficult. It appears to start and load just fine, but when it comes to loading our application, its just got stuck for 2-5 minutes and then shut down. Here is the log on the original machine where it works fine: 2010-02-12 11:52:40,506 INFO Web application servlet context is initializing... 2010-02-12 11:52:40,540 DEBUG Servlet context attribute added: select_jobType=[{1,Undefined}, {100,Completion}, {200,Plugging}, {300,R+M}, {400,Workover}, {500,Swab - tubing}, {600,Swab - fluid}] 2010-02-12 11:52:40,540 DEBUG Servlet context attribute added: select_jobTaskType=[{1,Undefined}, {100,Rod part}, {200,Tubing leak}, {300,Pump change}, {400,Stripping job}, {500,Long stroke}, {600,A/L optimization}] 2010-02-12 11:52:40,541 DEBUG Servlet context attribute added: select_wellType=[{1,Undefined}, {100,Rod pump}, {200,ESP}, {300,Injector}, {400,PC pump}, {500,Co-Rod}, {600,Flowing}, {700,Storage}] 2010-02-12 11:52:40,541 DEBUG Servlet context attribute added: select_assetType=[{1,Rig}, {100,Disabled rig}] 2010-02-12 11:52:40,542 DEBUG Servlet context attribute added: select_state=[{AL,Alabama}, {AK,Alaska}, {AZ,Arizona}, {AR,Arkansas}, {CA,California}, {CO,Colorado}, {CT,Connecticut}, {DE,Delaware}, {FL,Florida}, {GA,Georgia}, {HI,Hawaii}, {ID,Idaho}, {IL,Illinois}, {IN,Indiana}, {IA,Iowa}, {KS,Kansas}, {KY,Kentucky}, {LA,Louisiana}, {ME,Maine}, {MD,Maryland}, {MA,Massachusetts}, {MI,Michigan}, {MN,Minnesota}, {MS,Mississippi}, {MO,Missouri}, {MT,Montana}, {NE,Nebraska}, {NV,Nevada}, {NH,New Hampshire}, {NJ,New Jersey}, {NM,New Mexico}, {NY,New York}, {NC,North Carolina}, {ND,North Dakota}, {OH,Ohio}, {OK,Oklahoma}, {OR,Oregon}, {PA,Pennsylvania}, {RI,Rhode Island}, {SC,South Carolina}, {SD,South Dakota}, {TN,Tennessee}, {TX,Texas}, {UT,Utah}, {VT,Vermont}, {VA,Virginia}, {WA,Washington}, {WV,West Virginia}, {WI,Wisconsin}, {WY,Wyoming}, {ACO,Atlantic Coast Offshore}, {FOAK,Federal Offshore Alaska}, {NGOM,Northern Gulf of Mexico}, {PCO,Pacific Coastal Offshore}] 2010-02-12 11:52:40,542 INFO KeyviewContextMonitor.contextInitialized: Loaded drop-down lists:com/key/portal/web/common/lists.properties 2010-02-12 11:52:40,937 DEBUG Servlet context attribute added: org.apache.struts.action.SERVLET_MAPPING=*.do 2010-02-12 11:52:40,937 DEBUG Servlet context attribute added: org.apache.struts.action.ACTION_SERVLET=org.apache.struts.action.ActionServlet@155d578 2010-02-12 11:52:41,939 DEBUG Servlet context attribute added: org.apache.struts.action.MODULE=org.apache.struts.config.impl.ModuleConfigImpl@e08e9d 2010-02-12 11:52:41,962 DEBUG Servlet context attribute added: org.apache.struts.action.FORM_BEANS=org.apache.struts.action.ActionFormBeans@b31c3c 2010-02-12 11:52:41,967 DEBUG Servlet context attribute added: org.apache.struts.action.FORWARDS=org.apache.struts.action.ActionForwards@102c646 2010-02-12 11:52:41,973 DEBUG Servlet context attribute added: org.apache.struts.action.MAPPINGS=org.apache.struts.action.ActionMappings@127276a 2010-02-12 11:52:41,974 DEBUG Servlet context attribute added: org.apache.struts.action.MESSAGE=org.apache.struts.util.PropertyMessageResources@18cae13 2010-02-12 11:52:41,984 DEBUG Servlet context attribute added: org.apache.struts.action.PLUG_INS=[Lorg.apache.struts.action.PlugIn;@f875ae 2010-02-12 11:52:46,816 INFO Sucessfully loaded application properties com/key/core/properties/application On my second environment, it didn't execute the last line. I start tomcat with the exact same command line !/bin/ksh export JAVA_HOME=/app/java export CATALINA_HOME=/app/tomcat export CATALINA_BASE=/app/keyview/appserver CATALINA_OPTS=" -Xms128m -Xmx800m -Dapplication.props=com/key/core/properties/application -Dlog4j.configuration=com/key/core/log/log4j.xml -Djava.awt.headless=true -Dlog4j.debug" export CATALINA_OPTS ${CATALINA_HOME}/bin/startup.sh I bolded the line that I think are in error. Thanks

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• Dovecot, Postfix, Postfixadmin - can't send/receive mail

  - by Jack

  I am setting up a mail server: Dovecot and Postfix with MySQL support and Postfixadmin. Spend literally all day trying to figure it out, but I'm still unable to neither send nor receive any emails. To my knowledge, I have configured everything correctly, so either there is another problem, or my knowledge isn't good enough. Here is what I get when I use "echo test | mail [email protected]:" Jul 11 00:41:07 server postfix/pickup[17999]: 5B0D32AE1B: uid=0 from= Jul 11 00:41:07 server postfix/cleanup[19444]: 5B0D32AE1B: message-id=<[email protected] Jul 11 00:41:07 server postfix/qmgr[18513]: 5B0D32AE1B: from=, size=329, nrcpt=1 (queue active) Jul 11 00:41:12 server postfix/smtp[19448]: 5B0D32AE1B: to=, relay=none, delay=5.3, delays=0.1/0.01/5.2/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=dsa.com type=MX: Host not found, try again) *@mail.asd.com is changed for privacy reasons, same goes for [email protected]. *The bold text is where it, for some reason, prints out dsa.com - even though I haven't found it anywhere in the files which I've edited during the installation, nor my DNS is .com in the first place. Here is what I get when I try to send out an email from Postfix Admin interface: Jul 11 00:49:08 server postfix/smtpd[19479]: connect from localhost[127.0.0.1] Jul 11 00:49:08 server postfix/trivial-rewrite[19484]: warning: do not list domain asd.com in BOTH mydestination and virtual_mailbox_domains Jul 11 00:49:08 server postfix/smtpd[19479]: 4F7892AE1E: client=localhost[127.0.0.1] Jul 11 00:49:08 server postfix/cleanup[19487]: 4F7892AE1E: message-id=<[email protected] Jul 11 00:49:08 server postfix/qmgr[18513]: 4F7892AE1E: from=, size=317, nrcpt=1 (queue active) Jul 11 00:49:08 server postfix/smtpd[19479]: disconnect from localhost[127.0.0.1] Jul 11 00:49:10 server postfix/smtpd[19492]: connect from localhost[127.0.0.1] Jul 11 00:49:10 server postfix/trivial-rewrite[19484]: warning: do not list domain asd.com in BOTH mydestination and virtual_mailbox_domains Jul 11 00:49:10 server postfix/smtpd[19492]: 743AE2AE1F: client=localhost[127.0.0.1] Jul 11 00:49:10 server postfix/cleanup[19487]: 743AE2AE1F: message-id=<[email protected] Jul 11 00:49:10 server postfix/qmgr[18513]: 743AE2AE1F: from=, size=772, nrcpt=1 (queue active) Jul 11 00:49:10 server postfix/smtpd[19492]: disconnect from localhost[127.0.0.1] Jul 11 00:49:10 server amavis[13437]: (13437-11) Passed CLEAN, LOCAL [127.0.0.1] - , Message-ID: <[email protected], mail_id: 86+KQY93ANel, Hits: -0.002, size: 317, queued_as: 743AE2AE1F, 2145 ms Jul 11 00:49:10 server postfix/smtp[19489]: 4F7892AE1E: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=2.3, delays=0.17/0.01/0/2.1, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 743AE2AE1F) Jul 11 00:49:10 server postfix/qmgr[18513]: 4F7892AE1E: removed I really don't know what might be the problem... If you need to know something, feel free to ask and I'll clarify something.

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• Restart mysql keeping the data

  - by sitonico

  Hi all, I'm quite new using mysql, so let me know if I'm missing something. I took some holidays, and when I got back to work and I tried to log in phpmyadmin I got a ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2). I never had this problem, so I was browsing to look for a solution. I tried some things, and I'm afraid I touched too much. I couldn't solve the problem, and the I realized that I had some actualizations to be done, and I thought that they may be helpful for mysql. Then I also realized that when I was doing this actualizations first day, they stopped because I had a lack of space, so I restarted then. Then,when the system was configuring mysql, it didn't advance. I waited for a long time and then I just stopped it and restarted the computer. After it, I just tried to uninstall mysql with sudo apt-get remove mysql-server-5.1, and install it again, but it didn't work. Now I have 2 questions: What do you think it is happening? Should I remove mysql completely? What should I do? I'm afraid of losing my databases, is there anyway to recover the data? Thank you very much in advance. -----------EDIT------- These are the messages: alfonso@alfonso-laptop:/$ tail -F /var/log/syslog | grep Feb 15 15:08:01 alfonso-laptop init: mysql post-start process (15192) terminated with status Feb 15 15:08:01 alfonso-laptop init: mysql main process (15263) terminated with status Feb 15 15:08:01 alfonso-laptop init: mysql main process ended, Feb 15 15:08:31 alfonso-laptop init: mysql post-start process (15264) terminated with status Feb 15 15:08:31 alfonso-laptop init: mysql main process (15358) terminated with status Feb 15 15:08:31 alfonso-laptop init: mysql main process ended, Feb 15 15:09:01 alfonso-laptop init: mysql post-start process (15359) terminated with status Feb 15 15:09:01 alfonso-laptop init: mysql main process (15447) terminated with status Feb 15 15:09:01 alfonso-laptop init: mysql main process ended, Feb 15 15:09:32 alfonso-laptop init: mysql post-start process (15448) terminated with status 1 This is the content of error.log-old 110128 13:17:20 [Note] /usr/sbin/mysqld: Normal shutdown 110128 13:17:20 [Note] Event Scheduler: Purging the queue. 0 events 110128 13:17:20 InnoDB: Starting shutdown... 110128 13:17:22 InnoDB: Shutdown completed; log sequence number 0 590872 110128 13:17:22 [Note] /usr/sbin/mysqld: Shutdown complete 110214 2:08:18 [Note] Plugin 'FEDERATED' is disabled. 110214 2:08:19 InnoDB: Started; log sequence number 0 590872 110214 2:08:19 [Note] Event Scheduler: Loaded 0 events 110214 2:08:19 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.41-3ubuntu12.8' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu)

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• Hyper-V Machine drifts time all over, even with NTP

  - by MichaelGG

  Resolved The problem was Hyper-V on that machine. I removed Hyper-V, installed VMware Server, ran the same VM. Time sync issues went away (< 100ms difference after a day). My setup is like this: HYV1 - HyperV machine (non domain) - sync irrelevant AD1 - VM AD server on HYV1, sync'd to time.nist.gov. HyperV time sync off. S1 - Physical machine, sync'd to domain. S2 - Physical machine running HyperV, sync'd to domain. V1 - Linux VM machine on S2, sync'd to AD1. No HyperV integration. AD1 and S1 have fine sync -- stripchart shows less than 100ms difference. S2 drifts like crazy. Here's a bit of the stripchart against AD1: 18:33:22 d:+00.0010138s o:+05.4101899s 18:33:24 d:+00.0010138s o:+05.4319765s 18:33:26 d:+00.0000000s o:+05.4788429s 18:33:28 d:+00.0000000s o:+05.6089942s 18:33:30 d:+00.0010138s o:+05.7240269s 18:33:32 d:+00.0000000s o:+06.0421911s 18:33:34 d:+00.0081104s o:+06.5613708s 18:33:37 d:+00.0000000s o:+06.9096594s 18:33:39 d:+00.0000000s o:+06.8867838s 18:33:41 d:+00.0010127s o:+06.8936401s In 20 seconds, it drifted over a second. If I manually reset it to within 1s, within a few minutes it'll be back drifting about 2 seconds. Overnight it went from ~2s to ~5s. The Linux VM inside S2 has perfect sync with AD1. Here's the config: C:\Users\mgg>w32tm /dumpreg /subkey:Parameters Value Name Value Type Value Data ------------------------------------------------------------ ServiceDll REG_EXPAND_SZ %systemroot%\system32\w32time.dll ServiceMain REG_SZ SvchostEntry_W32Time ServiceDllUnloadOnStop REG_DWORD 1 Type REG_SZ NT5DS NtpServer REG_SZ ad01.mydomain ad02.mydomain C:\Users\mgg>w32tm /dumpreg /subkey:Config Value Name Value Type Value Data ----------------------------------------------------------- FrequencyCorrectRate REG_DWORD 4 PollAdjustFactor REG_DWORD 5 LargePhaseOffset REG_DWORD 50000000 SpikeWatchPeriod REG_DWORD 900 LocalClockDispersion REG_DWORD 9 HoldPeriod REG_DWORD 5 PhaseCorrectRate REG_DWORD 1 UpdateInterval REG_DWORD 30000 EventLogFlags REG_DWORD 2 AnnounceFlags REG_DWORD 5 TimeJumpAuditOffset REG_DWORD 28800 MinPollInterval REG_DWORD 2 MaxPollInterval REG_DWORD 8 MaxNegPhaseCorrection REG_DWORD -1 MaxPosPhaseCorrection REG_DWORD -1 MaxAllowedPhaseOffset REG_DWORD 300 I looked at the event log, and apart from warnings about sync (after it gets way out of sync), there's no other warnings. How can I go about troubleshooting this? It's the only machine that is having this problem. All the other machines (physical and virtual) are doing fine. Edit: To clarify: The VM (AD1) has integration turned off and syncs to time.nist.gov. AD1 is fine. It's the physical machine S1 that can't sync to AD1 and drifts all over. All the other physical servers are able to sync to AD1 just fine. Update So, it appears to be an issue of running the VM. The clock slips slowly with the VM off. Turned on, it immediately starts losing seconds. I swt the VM to only use half the resources, and that seems to have slightly mitigated it, for now. Thanks!

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• Tomcat can't talk to MySql after outage

  - by gav

  I missed a payment for my server and hey suspended my account for a day or so. When they brought the server back up all my data was in tact but for some reason Tomcat can't make a JDBC connection to my MySql server. They both run on the same machine and hence I have a bind address of 127.0.0.1. It's strange because I have reset the machine of my own accord before without issue but clearly something has been reset in the downtime. I followed this guide (Just the bits which don't concern S3, I am not on Amazon infrastructure) originally and everything worked as expected. I'm very new to being a SysAdmin and I'm not sure what to try, how would you go about diagnosing this issue? The stack trace I get is as follows; INFO: Deploying web application archive myapp-1.1.war 2010-05-26 22:07:22,221 [main] ERROR context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Could not get Connection for extracting meta data; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.codehaus.groovy.grails.commons.spring.ReloadAwareAutowireCapableBeanFactory.doCreateBean(ReloadAwareAutowireCapableBeanFactory.java:129) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.context.support.AbstractApplicationContext.initMessageSource(AbstractApplicationContext.java:714) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:404) at org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext.refresh(GrailsWebApplicationContext.java:153) ... I get this error for a number of 'beans'. If I type mysql at my command prompt then I can easily login with the same credentials as my grails app which uses GORM and Hibernate to persist objects to the DB. I might not have given enough info to start with but I'm really interested to learn and will certainly provide it if asked, I just really don't know where to start on this one. Thanks, Gav

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• prevent filesystem from entering read-only mode

  - by user788171

  I have found that my server's filesystem is continuously entering read-only mode. There have been some issues with the raid1 array, but I have removed the bad disk from the array. However, it is still physically plugged into the system because I haven't had a chance to go over to the datacentre, I suspect udev and the system kernel is still picking up the bad disk and throwing errors. In /var/log/messages, there are errors like this: Mar 2 06:53:14 nocloud kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xe frozen Mar 2 06:53:14 nocloud kernel: ata1: irq_stat 0x00400040, connection status changed Mar 2 06:53:14 nocloud kernel: ata1: SError: { PHYRdyChg DevExch } Mar 2 06:53:14 nocloud kernel: ata1: hard resetting link Mar 2 06:53:20 nocloud kernel: ata1: link is slow to respond, please be patient (ready=0) Mar 2 06:53:21 nocloud kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Mar 2 06:53:21 nocloud kernel: ata1.00: configured for UDMA/133 Mar 2 06:53:21 nocloud kernel: ata1: EH complete This happens fairly randomly throughout the day until eventually the filesystem becomes read-only. When this happens, my system becomes non-operational which kind of defeats the purpose of having a raid1. Note, ata1 is the bad disk (I think ata1 corresponds to /dev/sda because they are both first in line). Under mdadm, /dev/sda1,2 is no longer being used, but I can't prevent the system kernel from continuing to query that disk when I am no longer using it and throwing these errors. Is there a way to prevent my filesystem from automatically going into read-only mode? Furthermore, is it safe to do so? Thanks in advance. EDIT: Additional information: output from cat /proc/mdstat md1 : active raid1 sdb2[1] 976554876 blocks super 1.1 [2/1] [_U] bitmap: 5/8 pages [20KB], 65536KB chunk md0 : active raid1 sdb1[1] 204788 blocks super 1.0 [2/1] [_U] Output from mount: /dev/mapper/VolGroup-LogVol00 on / type ext4 (rw,noatime) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/md0 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) EDIT2: pvdisplay output: --- Physical volume --- PV Name /dev/md1 VG Name VolGroup PV Size 931.32 GiB / not usable 2.87 MiB Allocatable yes (but full) PE Size 16.00 MiB Total PE 59604 Free PE 0 Allocated PE 59604

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• Lock ups, crashing, transferring files using TrueCrypt with iSCSI

  - by Anthony

  I have looked into this error and it seems that it hasn't been discussed yet - or at least I can't find any information relating. I'm having issues transferring files, usually larger files over a couple of hundred MB. Here is the setup: QNAP 410 as iSCSI Target with multiple LUNs. (CRC is turned on (Data Digest and Header Digest) Server 2003 with iSCSI Initiator version 2.08 - build 3825 (I'm copying files from anothe machine to shares on Server 2003 = into TrueCrypt volume ergo onto the NAS) I have mounted the LUN and formatted it with TrueCrypt using NTFS (Full format, not a quick one). What happens is some files, mainly RAR/Compressed files, appear as if they copy but fail. I've tested this in a number of ways and can repeat the process every time. So I thought to check transfer over iSCSI without TrueCrypt in between, a plain NTFS format - no problem at all. So it would seem TrueCrypt is at least part of the problem here. I haven't tried copying directly from the server yet, I will try that. I also haven't tried it without CRC but fail to see how that would affect this. I will update with my findings later. In the meantime does anyone have any ideas as to what could be wrong? Thanks for your time. Update: I copied a set of files, the ones I was having issues with, to the server then from there I copied those into two places within the TrueCrypt volume (Mounted on the NAS). A seperate directory create in the root of the volume The same initial directory I was using in the first instance Both worked fine. So it now seems clear that this is a link between TrueCrypt, iSCSI and Windows Shares. I say this because I originally setup the whole system using TrueCrypt volume files, not iSCSI. I changed it as it didn't suit my requirements - day wasted as well. While I had this setup though I copied my entire file set to the volume files and all files copied without error - over the network, from a pc, to the server where TrueCrypt had the volume files mounted from the NAS. I didn't bother turning off CRC on the iSCSI system as I highly doubt that is the cause in light of this finding. So any ideas?

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• Run Flyff without elevating user to Admin or requiring Admin Password

  - by AnonJr

  Bottom Line: I need to set up one game on my little sister's laptop to run without requiring an admin password/account. Its the only game that seems to insist on it... so far. Detailed Version: I set up my 14-year-old sister as a regular user on her Windows 7 Home Premium laptop, and almost everything has been fine - until she found a new game (Flyff) that doesn't seem to want to run without an Admin Password (or being logged in as an Admin). For what should be obvious reasons, I'm not going to make her an Admin. or give her the Admin password (which she swears she'll only use to run this game... anyone else buying that? Bueller?) Also, the parents aren't admins on her laptop (they are on their own, but that's another discussion for another day) and I'm not going to set them up as one as I know from past experience that the 3rd time my sister asks them to put in their password, they'll just tell her what it is - at which point I might as well as have just set her up as an admin from the outset. This is a Win7 Home Premium (64-bit, but I doubt that makes a difference) laptop, so using GPEdit is out. I also tried an answer provided in a related (but less specific) question. The app has read/write permissions for its folder in Program Files (x86), yet that doesn't seem to make a difference. I have not yet dug through the registry as mentioned in another answer to the aforementioned question. Just to be thorough, I have checked the "Run as Admin" option on the shortcut's properties to no avail. Am I missing something? Addendum 2010-11-11: Re-Checked permissions as per Joel's answer, and it didn't make a difference. Followed Jane T's suggestion (and Aeo's second) and created a "Games" folder outside Program Files, installing the game there - and making sure regular users had all the permissions they would need. No joy. After the latter of the above two changes, it occurred to me that it may be a UAC issue, so for kicks I turned off UAC - still the damn message. Last item noted: could it be a result of the publisher not being specified/verified? I've been taking a closer look at the error message and it occurred to me that the missing/unverified publisher info could have been the problem all along... Correct me if I'm wrong, but if that's the case, that means there's nothing I can do short of giving her some sort of Admin privileges (i.e. elevating her account, or giving her the password to a separate Admin account) or giving Mom an Admin account.

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• Problems updating to Windows 8.1

  - by user52428

  yesterday I attempted to upgrade to windows 8.1 from windows 8. My brother downloaded it on his computer the day before then. I got it from the Windows store. It downloaded and prompted me to restart so I did. It just had the windows 8 loading screen with the HP sign above it, no percentages or anything else, I waited for about 2 hours and while I was waiting I did some research. After reading I saw it could take 20 minutes to an hour to update, but it had already been 2 hours. I read another article and it said someone restarted their computer and it restored to windows 8.0. That's what I did and it worked. So I tried again and the same thing happens, so instead of waiting I decided I would just restart it again. I tried again and this time it showed a percentage it said,"Setting Up" After it reached 100% it went back to what happened before HP sign and just loaded again, I thought it would be different this time because it did show percentages. I waited an hour and nothing happened so I restarted the computer again. This time when I restarted it, it didn't restore, so I turned the laptop of for around 30 minutes turned it back on and it said,"Attempting to restore to previous version of Windows" It said that for around 10 minutes and it restored, so I shut downed my computer for an hour and did some more research, later I found that I needed to update my drivers my drivers we're updated so I did some more research after this I saw I needed to search for updates via: SettingsChange PC settingsWindows Update. It said I already had automatic updates on, I decided to check for updates and it said there was one update scheduled for Saturday. I didn't think this could change anything so I updated what I could. I tried to install it again it was around 11:30 last night when it was done downloading and it prompted me to restart but I had gone to sleep. I woke up today and saw it showed the HP sign and loaded again. I tried restarting it again but this didn't work I had to shut it of for 30 minutes and try again and it worked. So now I'm posting this seeing If I can get any help with this problem. Any help is appreciated. Thanks!

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• Sysadmin 101: How can I figure out why my server crashes and monitor performance?

  - by bflora

  I have a Drupal-powered site that seems to have neverending performance problems. It was butt-slow about 5 months ago. I brought in some guys who installed nginx for anonymous visitors, ajaxified a few queries so they wouldn't fire during page load, and helped me find a few bottlenecks in the code. For about a month, the site was significantly faster, though not "fast" by any stretch of the word. Meanwhile, I'm now shelling out $400/month to Slicehost to host a site that gets less than 5,000/uniques a day. Yes, you read that right. Go Drupal. Recently the site started crashing again and is slow again. I can't afford to hire people to come in, study my code from top to bottom, and make changes that may or may not help anymore. And I can't afford to throw more hardware at the problem. So I need to figure out what the problem is myself. Questions: When apache crashes, is it possible to find out what caused it to crash? There has to be a way, right? If so, how can I do this? Is there software I can use that will tell me which process caused my server to die? (e.g. "Apache crashed because someone visited page X." or "Apache crashed because you were importing too many RSS items from feed X.") There's got to be a way to learn this, right? What's a good, noob-friendly way to monitor my current apache performance? My developer friends tell me to "just use Top, dude," but Top shows me a bunch of numbers without any context. I have no clue what qualifies as a bad number or a good number in Top, or which processes are relevant and which aren't. Are there any noob-friendly server monitoring tools out there? Ideally, I could have a page that would give me a color-coded indicator about how apache is performing and then show me a list of processes or pages that are sucking right now. This way, I could know when performance is bad and then what's causing it to be so bad. Why does PHP memory matter? My apparently has a 30MB memory foot print. Will it run faster if I bring that number down? Thanks for any advice. I spent a year or so trying to boost my advertising income so I could hire a contractor to solve my performance woes. I didn't want to have to learn all this sysadmin voodoo. I'm now resigned to the fact that might not have a choice.

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• Intermittent Disconnection of Client Computers from Domain Server

  - by dilip nagle

  The Background: I have Windows 2008 server Enterprise Version with 25 user cal licences. It has a domain and all users and a network shared HP printer in it. The Server has two network cards and both these cards as well as all client machines are on IP addressing scheme of 192.168.1.* with subnetmask 255.255.255.0. Of the two network cards viz. 192.168.1.231 and 192.168.1.233, only 192.168.1.231 is registered with DNS. In 192.168.1.233(i.e. 2nd network card) has default getway as 192.168.1.231 and dns address as 192.168.1.231. The Server has three hard disks with capacities as 500gb, 500gb and 1TB and are partitioned as (C,D,E), (F,G) and (K) with partition K having all user data into various Shared Folders. Each of these folders(On Partition K), are mapped onto each user's computer as per the right of access given to them. The Problem: The Server was installed about 6 months ago and till date not even once, the Server has Hung or has given any problem. All the Clients computers are able to run the web based software from their computers via ip address, e.g. http://192.168.1.231/webERP/default.aspx. However, occassionally, when any client computer tries to browse network mappings, it hangs. Again, there is no fixed pattern. This may happen after running smoothly for say 3 days. On each Client's machine, the network settings are as follows: IP Address: 192.168.1.* where * is 1,2,3 .... Sunnetmask: 255.255.255.0 defauly getway: 192.168.1.231 Which is a server card and DNS address. preferred DNS Server: 192.168.1.231 In Advanced Tab under Wins: LMHostLookup is Unticked and default is radio buttoned. Ideally, I would have loved to have Disabled NETBIOS over TCP/IP but some network printers do not get accessed if this option is enabled(ie. Radio Buttoned). Bacause Disabling Netbios will drastically reduce traffic of NETBIOS broadcasting to all the computers on the net to do naming resolution. On Server, I have WINs Running which I have Scavanged Records, verified Database Integrity etc, removed Tombstoned Records etc. The Critical Errors shown only once a day when the server is statred are 4224(WINS) and 12923 - Server Licencing failed to Update DNS Record. I fail to understand as why do client machines HANG when they try to browse mapped network shared folders on K Drive. Kindly Advice

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• Blank displays after inactivity, mouse cursor not showing up

  - by Mike Christiansen

  I have a Windows 7 Enterprise x86 machine that is exhibiting some strange problems. After some inactivity (it varies how long it takes), when I come back to my computer, both of my monitors are black. The monitors are on, with a black display. Moving the mouse and pressing keys on the keyboard do not work. This happens at least once a day. When I first encountered the issue, I performed a hard shutdown and restarted the computer. About 10% of the time when I did this, the resolutions on my monitors were messed up. The native resolution on the primary monitor is 1600x900, and the native on my secondary is 1440x900. None of the widescreen resolutions would be present in the display properties. I had 800x600, 1024x768, and 1280x1024. As a workaround to this issue, I've found that if I plug in my secondary monitor as the primary monitor, and leave the secondary unplugged, then Windows will start in 1024x768 on the secondary. Then, I can use Windows 7's "Detect" feature and it finds the 1440x900 resolution, and sets it. Then I have to connect the primary monitor to the secondary port and set it as the primary. Then I can switch the two cables, putting the primary into the primary, the secondary into the secondary. Then use the "Detect" feature again, and it finds the correct resolutions. Some time after performing the above, I discovered that when the screens were blanked, I could simply press "Control+Alt+Delete", type in my password, and everything comes up fine - except my mouse cursor. All applications and features work as intended, except there is no mouse cursor (the mouse actually works though...). I have the "Show location of pointer when I press CTRL key" option selected, so I can press CTRL and use my mouse as normal - but I have no actual cursor. When the computer is in this state, UAC is also not functional. Whenever a UAC prompt appears, the screens go black (the original symptoms) and I have to press Escape to exit UAC. Because of the above symptoms (the UAC black screen thing, etc) I beleive winlogon.exe may be the culprit. However, I have no idea how to fix it. I am unable to restart winlogon.exe due to the problems I am having with winlogon.exe (the UAC black screen) Looking for any ideas.... More information Windows 7 x86 Enterprise Domain environment (I have a secondary account with administrator rights) Dell Optiplex 960 Cannot perform "optional" windows updates due to an activation issue (I am testing a windows 7 image, and an activation infrastructure has not been created yet. However, this issue was happening before I was unable to perform windows update, and windows was up to date at the time Updated video card driver (as an attempt to fixing the resolution issue) Disabled all power saving options Please let me know what else you need to help me solve this issue! Thanks in advance, Mike

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• Brand new Mac Pro tower fan suddenly runs full-tilt

  - by Caffeine Coma

  My Quad-Core Mac Pro tower is two days old. Initially, I was impressed with how quiet it was compared to my older Macbook Pro. Then on day two, for some reason it started running very loudly. It's not just a "little" loud- my wife walked into the room and asked what the noise was. At first I thought this was just because I was hitting the CPU a bit (importing my iPhone library into iLife '09, and running Eclipse). But now that that's done, Activity Monitor shows a virtually idle CPU; there's nothing running that ought to be causing this, as far as I can tell. I tried powering it off & letting it cool down for a few minutes to no avail; about 10 seconds after powering up, the box gets loud again. I took a look at it with the side cover off, and it seems to be the fan near the top middle, between the power supply and the disk drive. It can't be a dust issue, as the machine is only 2 days old (and I peeked inside anyway just to be sure- clean). I did do a software update over the past 24 hours or so, but I can't say that it occurred immediately after that. I also did a migration of my old apps and data from my MBPro, for what it's worth. Why is it suddenly so loud? How can I monitor the fan speed and various system temperatures? Here's a link to my temps and fan speeds. UPDATE 1: Took it to the Apple Store. They took it in the back (where it's presumably quieter) and ran a fan diagnostic; no problems were found. The guy also told me that it was "a little loud", but normal. I don't buy it. It was virtually silent the first 24 hours I was using it. They would not replace/service it in the store (grrr... that's why I went there, as directed by Apple Care) but said I could get a replacement from the online store, as it was just purchased. I think I will try that. UPDATE 2: Apple is letting me send it back for a replacement. Glad to see so many responses to this question mentioning that the MacPros are usually silent; it's not all just in my head. :-)

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