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• Installing SATA dvd burner on machine with no spare SATA ports/connectors

  - by Faheem Mitha

  Greetings. I have the following motherboard Tyan Thunder K8WE S2895A2NRF Motherboard - extended ATX - nForce Pro 2200/2050 - Socket 940 - UDMA133, Serial ATA-300 (RAID) - 2 x Gigabit Ethernet - FireWire - 6-1 channel audio This is part of a computer that was assembled in the winter of 2006/2007. The user manual says the following with regard to SATA Integrated SATAII Generation 1 Controllers (from NForce Professional 2200) Two integrated dual port SATA II controllers Four SATA connectors support up to four drives 3 Gb/s per direction per channel NvRAID v2.0 support Supports RAID 0, 1, 0+1 and JBOD. I just purchased a SATA DVD burner. Here is the page for the product http://www.amazon.ca/gp/product/B002QGDWLK/ The problem I am facing is that I already have 4 SATA drives installed. I don't want to remove any of them. However, I want the DVD burner above installed as well. The person I am consulting with here (Bombay, India) tells me that my four available SATA ports are filled, and that my only option is to install a SATA card into the one free PCI slot on the motherboard. However, he says that with this setup I will not be able to boot from the DVD drive. Are these statements correct, and what are my other options if any? Even it the statements in the last para are true, I suppose I could use one of the motherboard connectors/ports there are currently being used with the hard drives with the DVD drive, and use the "add-on" connector with one of the hard drives. Not all the 4 hard drives need to be bootable. BTW, despite having read through http://en.wikipedia.org/wiki/Serial_ATA#Cables.2C_connectors.2C_and_ports I am fuzzy on the differences between connectors, cables and ports. Thanks in advance.

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• Cant connect to MySQL server from Java application

  - by RN

  This is on VPS\Centos server. The MySQL server is pre configured. I am running the Java application on Tomcat My Java web application is not able to connect to the MySQL server. I get an error - "Caused by: java.net.ConnectException: Connection refused" I suspect this to be a configuration problem rather than a coding problem- hence I have posted this on ServerFault And yes, The same web-app is able to connect to MySQL on a different linux box This is the URL that I provided to my Java application (note- it assumes default port) url = "jdbc:mysql://localhost/pickupgames" My first suspicion was that I am running on a non-default port So I tried to find the port where mySQL server is running I tried every trick mentioned in http://serverfault.com/questions/116100/how-to-check-what-port-mysql-is-running-on But no luck ! SHOW GLOBAL VARIABLES LIKE 'PORT'; This shows port 0 netstat -tlnp doesn't show mysql at all /etc/my.cnf It has no port entry telnet localhost 3306 Doesn't connect And in case you are wondering if mysql server is running at all or not It is And I know for sure, because I have been able to login using the mysql command Also # ps -ef|grep 'mysql' root 31839 27662 0 00:49 pts/3 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:06 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking Please note the --skip-networking parameter Does this have something to do with the issue ? Any explanation why I cant connect to mysql server on port 3306 by telnet? Or why it docent show up under netstat? Any suggestion on whet I should try next ?

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• Intel z77 vs h77 for intensive compiling, gaming [closed]

  - by Bilal Akhtar

  I'm in the market for a desktop motherboard (preferably ATX) that functions well with Intel i7-3770 Ivy Bridge processor at 3.4 GHz with LGA1155 socket. That processor is very fast, and it should handle all my tasks. My question is about the type of motherboard chipset I should choose to accompany it. I plan to use my rig for compiling and developing Debian package and other OS components, web development, occasional Android apps, chroots, VMs, FlightGear, other gaming but nothing serious, and heavy multitasking, all on Ubuntu. I do NOT plan to overclock, and I never will, so that's not a cause of concern for me. That said, I'm down to three chipset choices: Intel H77 Intel Z68 Intel Z77 I'm planning to go for H77 since I don't need any of the new features in Z77. I don't plan to use a second GPU and I will never overclock my CPU/GPU. My question is, will H77 based MoBos handle all my tasks well? Intel advertises that chipset as "everyday computing" but other sites say it's base functionality is the same as Z77. Intel rather advertises Z77 for "serious multitaskers, hardcore gamers and overclocking enthusiasts". But the problem with all Z77 motherboards I've seen is, they're way too expensive and their main feature seems to be overclocking, which won't be useful to me. Will I lose any raw CPU/GPU performance or HDD R/w with the H77 when comparing it to a Z77? Will heat, etc be an issue too? From what I've seen, Z77 motherboards have larger heat sinks when compared to H77 ones. Will that be an issue too, if I go with an H77 motherboard with no heat sinks for the chipset? The CPU will have a fan in both cases, of course. tl;dr When it comes to CPU/GPU performance and HDD r/w, is the Intel H77 chipset slower than the Z77? I don't care about overclocking or multiple GPUs, and for the processor, I'm set on Ivy Bridge i7-3770.

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• dnsmasq(as DHCP server) isn't working in KVM+libvirt envirmont

  - by user2681054

  I'm using dnsmasq as DHCP server in VM environment. But It didn't working. I disabled basic DHCP feature in libvirt. <network> <name>default</name> <uuid>84da0678-e56d-8fc2-6f8b-e8eba784849a</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:7B:64:0B'/> <ip address='192.168.122.1' netmask='255.255.255.0'> </ip> </network> As you can see, I removed this tag! <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> </dhcp> And I installed dnsmasq in Host machine. During installation dnsmasq, there was an error message about 127.0.0.1.(dnsmasq: failed to create listening socket for 127.0.0.1) So I commented out listen-address option, and added dhcp-range/dhcp-option options, like this. listen-address=127.0.0.1 dhcp-range=192.168.122.100,192.168.122.200,24h dhcp-option=option:router,192.168.122.1 That's all I've done with dnsmasq. But guest VM couldn't get IP address from host which is dnsmasq server running. After that , I installed isc-dhcp-server instead of dnsmasq.... and it works! But I still want to use dnsmasq instead of isc-dhcp-server. Are there any helping hands? I disabled host machine's firewall. I've heard that libvirt basically use dnsmasq. Is this the reason why I couldn't use dnsmasq in libvirt environment?

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• WAMP server not starting and a mystery service is using port 80

  - by David Gard

  I'm using WAMP on Windows 7 and tonight I'm unable to start it (it's been working fine for about 3 years previously). I first checked the logs, but nothing in there. So I checked the Windows Event Viewer (eventvwr), where I saw 2x errors for each attempted start - The Apache service named reported the following error: (OS 10048)Only one usage of each socket address (protocol/network address/port) is normally permitted. : make_sock: could not bind to address 0.0.0.0:80. The Apache service named reported the following error: no listening sockets available, shutting down. After this, I opened the command prompt and ran netstat -a, and to my surprise there were 3 entries for port 80 - Prot   Local Address  Foreign Address   State TCP   127.0.0.1:80       MyPCName:53831   TIME_WAIT TCP   127.0.0.1:80       MyPCName:57834   TIME_WAIT TCP   127.0.0.1:80       MyPCName:57839   TIME_WAIT From here, I'm kind of lost. As far as I can tell, something is utalising port 80, but I don't know what or why. If anyone is able to suggest what I might do next I'd be most greatful. Thanks.

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• Odd IIS FTP Failure

  - by Monkey Boson

  We're running a script on our production box that zips up our database and FTPs it to a backup box every night. Our production box is running Redhat Enterprise 5. Our backup box is running Windows XP Pro / IIS 5.1. Both machines are on the same VLAN (not sure if this is imporatant). The backup file usually clocks in at around 3GB. Every now and again (~5% of the time), the backup script fails. The shell script on the "client side" - which looks at return codes - never identifies any problem since ftp always returns 0. On the "server side", IIS writes out a log that looks like this: #Software: Microsoft Internet Information Services 5.1 #Version: 1.0 #Date: 2009-08-08 07:04:25 #Fields: time c-ip cs-method cs-uri-stem sc-status sc-win32-status 07:04:25 192.168.111.235 [15]USER backup 331 0 07:04:25 192.168.111.235 [15]PASS - 230 0 07:05:54 192.168.111.235 [15]created backup_20090808.zip 426 10035 07:06:16 192.168.111.235 [15]QUIT - 426 0 Now, I know that 426 means "Connection closed, transfer aborted", which is sort-of a catch-all for "IIS was not happy". The real puzzler is the wincode: 10035 (WSAEWOULDBLOCK -- Resource temporarily unavailable). My understanding is that this code is normal when using non-blocking socket calls - which would almost certainly be used by any FTP Server implementation. My first guess that it might be a timeout issue doesn't make sense, since we're only talking about a few minutes here and the timeout was left at the default 900 s. Does anybody have any ideas about what is causing this problem, and how it may be fixed? Thanks!

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• Joining two routers together, but I have no access to the second router, although I know it's IP address and Gateway

  - by JohnnyVegas

  I have temporarily moved into a rented apartment for 4 months, which has wireless. The trouble I am having is that the access points here are wifi only and no RJ45 and I need to use RJ45 to connect some equipment that I am working with. I have purchased an RT-N66U and installed Tomato (shibby ver. 1.28) and successfully replaced the existing access point, but now I want to enable the access point that I have replaced as it links wirelessly to 3 others. Can I plug in a cable from the access point to my RT-N66U and get it to access the internet via my router? I have no access to the existing wireless access point, and don't want to reset it as it's not mine. There is another router situated in the roof somewhere which I also have no access to, but it's supplying my RT-N66U internet and I most definitely have a double-nat, which although isn't the best way of doing things I am limited with what I can do. Any suggestions on routing tables, vlans etc would be helpful, but I have no experience in these fields before - but I know the tomato firmware can cater for this. My router is set to IP 10.0.1.1 and dhcp is 10.0.1.100-200 The wireless access point address was 192.168.1.2 but this was assigned by the router in the roof which has the address 192.168.1.1. There is a cable from this router going to a wall socket which I now have my RT-N66u attached to via the WAN port. I understand it's scruffy and it isn't the way to do things but I have tried to ask for the admin details but as the wireless network is looked after by a third party and nobody knows their details I am stuck with this dilemma. I could buy three wireless access points and replace the existing but this isn't what I want to do, and although I have installed plenty of DD-WRT wireless repeater bridges they simply don't work here for some unknown reason. The phone line here is very noisy too and I don't have the rights to install ADSL in a building that isn't mine, and 3G coverage isn't good enough either. Thanks for your time

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• Nginx all subdomain points to one subdomain (gitlab) rule

  - by Alkimake

  I have installed gitlab on my server and use nginx as http server... I simply used recipe for gitlab on nginx # GITLAB # Maintainer: @randx # App Version: 3.0 upstream gitlab { server unix:/home/gitlab/gitlab/tmp/sockets/gitlab.socket; } server { listen 192.168.250.81:80; # e.g., listen 192.168.1.1:80; server_name gitlab.xxx.com; # e.g., server_name source.example.com; root /home/gitlab/gitlab/public; # individual nginx logs for this gitlab vhost access_log /var/log/nginx/gitlab_access.log; error_log /var/log/nginx/gitlab_error.log; location / { # serve static files from defined root folder;. # @gitlab is a named location for the upstream fallback, see below try_files $uri $uri/index.html $uri.html @gitlab; } # if a file, which is not found in the root folder is requested, # then the proxy pass the request to the upsteam (gitlab unicorn) location @gitlab { proxy_read_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694 proxy_connect_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694 proxy_redirect off; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://gitlab; } } gitlab.xxx.com works fine and i get gitlab web documents. But if i want another subdomain i use for Jira (jira.xxx.com) on port 80 (i setup jira on 8080 port normally) gets gitlab web site also. How can i restrict this rule only serving for gitlab, or may be i can redirect jira.xxx.com to jira.xxx.com:8080

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• ADSL with RFC 2684 Bridging

  - by Axel Isouard

  My new ADSL line is now enabled, I can finally use my Netgear DM111Pv2 to use to the Internet. My ISP has told me a big surprise : I don't need to use a login and a password to connect to the Internet, then I must use the RFC 2684 bridging mode. It works pretty fine on the ADSL modem's side, but I've spent one night trying to figure out how to connect to the Internet through this modem. I only have a Fonera 2.0n and a computer running Gentoo Linux. I've been trying to use the br2684ctl utility with brctl on my Gentoo, first I've configured my kernel in that way : CONFIG_PPP=y CONFIG_PPP_BSDCOMP=y CONFIG_PPP_DEFLATE=y # CONFIG_PPP_FILTER is not set CONFIG_PPP_MPPE=y # CONFIG_PPP_MULTILINK is not set CONFIG_PPPOATM=y CONFIG_PPPOE=y CONFIG_PPP_ASYNC=y CONFIG_PPP_SYNC_TTY=y [...] CONFIG_ATM=y CONFIG_ATM_CLIP=y CONFIG_ATM_CLIP_NO_ICMP=y CONFIG_ATM_LANE=y CONFIG_ATM_MPOA=y CONFIG_ATM_BR2684=y # CONFIG_ATM_BR2684_IPFILTER is not set And I still get these messages : cirus nais # br2684ctl -b -c 0 -e 0 -a 8.35 br2684ctl[8041]: Interface "nas0" created sucessfully br2684ctl[8041]: Communicating over ATM 0.8.35, encapsulation: LLC br2684ctl[8041]: Fatal: failed to connect on socket; No such device The brctl utility keeps telling me "Invalid argument" each time I try to add the nas0 interface into my bridge, I'm honestly hoping I'm doing wrong. I've been following this README carefully and this tutorial on setting up a PPPoE connection with Gentoo, but the PPPoE interface just tries to start, and nothing special related to PPP happens, I can't see the interface when I do ifconfig. So, I'm asking you if there's something huge I've been missing since the beginning ! Maybe I should wait to buy a new router fully supporting the RFC2684 bridging mode, but I'm more interested in setting up this mode on my Fonera 2.0n and even my Raspberry Pi !

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• General logging won't work in MySQL

  - by leonstr

  I saw on SF that there's an option in MySQL to log all queries. So, in my version (mysql-server-5.0.45-7.el5 on CentOS 5.2) this appears to be a case of enabling the 'log' option, so I edited /etc/my.cnf to add this: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql old_passwords= log=/var/log/mysql-general.log [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I then created the file and set permissions: # touch /var/log/mysql-general.log # chown mysql. /var/log/mysql-general.log # ls -l /var/log/mysql-general.log -rw-r--r-- 1 mysql mysql 0 Jan 18 15:22 /var/log/mysql-general.log But when I start mysqld I get: 120118 15:24:18 mysqld started ^G/usr/libexec/mysqld: File '/var/log/mysql-general.log' not found (Errcode: 13) 120118 15:24:18 [ERROR] Could not use /var/log/mysql-general.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 120118 15:24:18 InnoDB: Started; log sequence number 0 182917764 120118 15:24:18 [Note] /usr/libexec/mysqld: ready for connections. Can anyone suggest why this isn't working?

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• Installing Mysql Ruby gem on 64-bit CentOS

  - by Jacek

  Hi, I have a problem installing mysql ruby gem on 64bit CentOS machine. [jacekb@vitaidealn ~]$ uname -a Linux vitaidealn.local 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux Mysql and mysql-devel packages are installed. Mysql_config provides following paths: Usage: /usr/lib64/mysql/mysql_config [OPTIONS] Options: --cflags [-I/usr/include/mysql -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing -fwrapv] --include [-I/usr/include/mysql] --libs [-L/usr/lib64/mysql -lmysqlclient -lz -lcrypt -lnsl -lm -L/usr/lib64 -lssl -lcrypto] --libs_r [-L/usr/lib64/mysql -lmysqlclient_r -lz -lpthread -lcrypt -lnsl -lm -lpthread -L/usr/lib64 -lssl -lcrypto] --socket [/var/lib/mysql/mysql.sock] --port [3306] --version [5.0.45] --libmysqld-libs [-L/usr/lib64/mysql -lmysqld -lz -lpthread -lcrypt -lnsl -lm -lpthread -lrt -L/usr/lib64 -lssl -lcrypto] Trying to install: [jacekb@vitaidealn ~]$ gem install mysql -- --with-mysql-include=/usr/include/mysql --with-mysql-libs=/usr/lib64/mysql ... ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb --with-mysql-include=/usr/include/mysql --with-mysql-libs=/usr/lib64/mysql checking for mysql_query() in -lmysqlclient... no checking for main() in -lm... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lz... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lsocket... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lnsl... no checking for mysql_query() in -lmysqlclient... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. I would appreciate any help. Thanks for reading :).

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• django, mod_wsgi, MySQL High CPU - Problems

  - by Red Rover

  Good Evening, and thank you for reading this post. I am having a problem with Django after migrating the dB from SQLlite to MySQL. Initially, for the first 48hours, all ran well. But now we are experiencing high cpu about every 30 minutes. This is a production ESX4i VM host, with 2 x 2.8 ghz CPUs and 12 GB ram. I have allocated 4 cpu's to this VM and 4 GB memory. Any insight into this configuration and help with the spikes in CPU would be appreciated. IT is configured to use the prefork MPM. Outlined are the config's for the different services: MySQL Server version: 5.1.61 Source distribution Django 1.3 mod_wsgi Apache/2.2.15 httpd.conf Timeout 120 KeepAlive Off MaxKeepAliveRequests 400 KeepAliveTimeout 3 prefork MPM StartServers 8 MinSpareServers 8 MaxSpareServers 16 ServerLimit 40 MaxClients 40 MaxRequestsPerChild 0 worker MPM StartServers 16 MaxClients 1024 MinSpareThreads 64 MaxSpareThreads 256 ThreadsPerChild 64 MaxRequestsPerChild 10240 MySQL my.conf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql symbolic-links=0 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid my.cnf wsgi.conf LoadModule wsgi_module modules/mod_wsgi.so /etc/httpd/conf.d/wsgi.conf WSGISocketPrefix /var/run/wsgi WSGIPythonEggs /var/tmp WSGIDaemonProcess SITE maximum-requests=10000 WSGIProcessGroup SITE

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• Can't Connect To Local Mysql Using IP Address, but CAN connect from remote server

  - by user1782041

  Here's an interesting one that does not seem to fall into any of the mysql connection issues I've read about or searched for: On an Ubuntu 12.04 box I had some system updates waiting to install, and I took care of that this evening. After the install, I started seeing some errors in my syslog complaining about a particular php script that could no longer connect to the mysql instance on the box. Here is the specific error: PHP Warning: mysql_connect(): Can't connect to MySQL server on '192.168.0.40' (4) Now, the server's IP address is 192.168.0.40, and I've checked to make sure that I have mysql listening on 0.0.0.0 so that I can connect using either "localhost" or "192.168.0.40". Here's where things get odd: From the local machine, if I try the following: mysql -uroot -p -h192.168.0.40 I get this error: ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.0.40' (110) I've checked, and error 110 indicates an OS timeout, and error 2003 is the mysql generic "can't connect" error. This indicates that it is not permissions with the user. However, if I do the same thing from a remote machine (say, from 192.168.0.30), I log right in with no problems. Futher, other scripts on the local machine that connect to mysql using "localhost" for the host rather than "192.168.0.40" connect with no problems. Also, I can connect via the mysql socket with no problems both from the command line and php scripts. So, this feels like a networking issue of some kind on the local box, but there are no iptables rules on this box (it is firewalled externally) and I can't figure out what else may be causing this. This problematic script worked perfectly prior to the latest system update. For now, I'll simply change the script to connect via localhost, but I'd really like to know why it broke for 2 reasons: There may be other scripts that connect using 192.168.0.40 that don't run very often which are now broken. Auditing them all will take more time than I feel like devoting at the moment. I'm curious, and want to know why it broke so I can fix it correctly. Any help?

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• Ubuntu server PPTPD with OS X clients Problems

  - by Nakedsteve

  I'm trying to get a PPTP server running on a ubuntu server, but I've run into some issues with it. I followed this guide on how to set up pptpd on my server, and everything went smooth, but when I try to connect with my mac, it gives me this error: Here's my configuration: Does anyone have any idea as to what I'm doing wrong here? Update: Here's what the pptpd.log has to say about it: steve@debian:~$ sudo tail /var/log/pptpd.log sudo: unable to resolve host debian Sep 3 21:46:43 debian pptpd[2485]: MGR: Manager process started Sep 3 21:46:43 debian pptpd[2485]: MGR: Maximum of 11 connections available Sep 3 21:46:43 debian pptpd[2485]: MGR: Couldn't create host socket Sep 3 21:46:43 debian pptpd[2485]: createHostSocket: Address already in use Sep 3 21:46:56 debian pptpd[2486]: CTRL: Client 192.168.1.101 control connection started Sep 3 21:46:56 debian pptpd[2486]: CTRL: Starting call (launching pppd, opening GRE) Sep 3 21:46:56 debian pptpd[2486]: GRE: read(fd=6,buffer=204d0,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs Sep 3 21:46:56 debian pptpd[2486]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7) Sep 3 21:46:56 debian pptpd[2486]: CTRL: Reaping child PPP[2487] Sep 3 21:46:56 debian pptpd[2486]: CTRL: Client 192.168.1.101 control connection finished My pptpd options are: asyncmap 0 noauth crtscts lock hide-password modem debug proxyarp lcp-echo-interval 30 lcp-echo-failure 4 nopix

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• UPS with a HP Proliant server

  - by Groo

  We placed a EATON Ellipse Max 1500 (900W) as the UPS for our HP Proliant ML350 G6. Upon first power failure (actually we only moved the UPS' input plug to a different socket), server immediatelly turned off, and the Health LED turned red and started blinking. UPS was in operation for about a week before that, with battery fully charged to 100%. Since our server's hot-plug supply is 460W, we are pretty sure we haven't overloaded it, the server was completely idle at that time (no web or win apps running except Windows Server core services). Then we tried to do the same with a different, no-name older PC (Core 2 Duo, 2Gb RAM) with a generic power supply (not sure what the power is) and it continued working when we pulled the plug out. UPS load was less than 15% (measured in the provided Eaton utility). We measured the UPS' output voltage using a smart oscilloscope and the THD of the UPS output waveform turned out to be 40%. Did you have similar experiences? Could this be a faulty UPS? Or a faulty power supply? Or some HP sensors configured to trigger too strictly? I wouldn't like replacing this UPS with the same brand, to get same results. [Edit] I also tried to do this while the server is turned off. While the UPS is working on battery, server will not start - as soon as I press the power button, Health LED starts blinking red.

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• Accessing SSH_AUTH_SOCK from another non-root user

  - by Danny F

  The Scenario: I am running ssh-agent on my local PC, and all my servers/clients are setup to forward SSH agent auth. I can hop between all my machines using the ssh-agent on my local PC. That works. I need to be able to SSH to a machine as myself (user1), change to another user named user2 (sudo -i -u user2), and then ssh to another box using the ssh-agent I have running on my local PC. Lets say I want to do something like ssh user3@machine2 (assuming that user3 has my public SSH key in their authorized_keys file). I have sudo configured to keep the SSH_AUTH_SOCK environment variable. All users involved (user[1-3]), are non privileged users (not root). The Problem: When I change to another user, even though the SSH_AUTH_SOCK variable is set correctly, (lets say its set to: /tmp/ssh-HbKVFL7799/agent.13799) user2 does not have access to the socket that was created by user1 - Which of course makes sense, otherwise user2 could hijack user1's private key and hop around as that user. This scenario works just fine if instead of getting a shell via sudo for user2, I get a shell via sudo for root. Because naturally root has access to all the files on the machine. The question: Preferably using sudo, how can I change from user1 to user2, but still have access to user1's SSH_AUTH_SOCK?

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• Nginx's speed, and how to replicate it [migrated]

  - by Mediocre Gopher

  I'm interested in this from more than an academic standpoint rather than a practical standpoint; I don't plan on creating a production webserver to compete with nginx. What I'm wondering is how exactly nginx is so fast. The top google response for this is this thread, but it merely links to a cryptic slideshow and a general covering of different io strategies. All other results seem to simply describe how fast nginx is, rather then the reason. I tried building a simple erlang server to try to compete with nginx, but to no avail; nginx won out. All my server does is spawn a new process for each request, uses that process to read the file to a socket, then closes the file and kills the thread. It's not complicated, but given erlang's lightweight processes and underlying aio structure I thought it would compete, but nginx still wins out by a consistent 300 ms average under a heavy stress test. What is nginx doing that my simple server isn't? My first thought would be keeping files in main memory instead of tossing them between requests, but the filesystem cache does this already so I didn't think it would make that great of difference. Am I wrong? Or is there something else that I'm missing?

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• Installing MySQL 5.1 on OS X 10.7 Lion

  - by xisal

  I am trying to install MySQL 5.1. I am on Lion, and when I remove all files associated with MySQL on my machine it still tells me that I have a newer version installed when I try to install it from the DMG file. Has anyone successfully installed MySQL 5.1 on Lion? I found a solution using Homebrew: Completely remove MySQL from your system (just in case) sudo rm /usr/local/mysql sudo rm -rf /usr/local/mysql* sudo rm -rf /Library/StartupItems/MySQLCOM sudo rm -rf /Library/PreferencePanes/My* vim /etc/hostconfig and removed the line MYSQLCOM=-YES- rm -rf ~/Library/PreferencePanes/My* sudo rm -rf /Library/Receipts/mysql* sudo rm -rf /Library/Receipts/MySQL* sudo rm -rf /var/db/receipts/com.mysql.* Source:http://stackoverflow.com/questions/1436425/how-do-you-uninstall-mysql-from-mac-os-x Install homebrew /usr/bin/ruby -e "$(curl -fsSL https://raw.github.com/gist/323731)" Source: https://github.com/mxcl/homebrew/wiki/installation Install MySQL 5.1 via brew brew install mysql51 if that doesn't work, do this: brew install https://raw.github.com/adamv/homebrew-alt/master/versions/mysql51.rb Source: http://stackoverflow.com/questions/4359131/brew-install-mysql-on-mac-os/6399627#6399627 Make MySQL Work Create mysql.sock file touch /tmp/mysql.sock Install MySQL default tables /usr/local/Cellar/mysql51/5.1.58/bin/mysql_install_db ...or your path Source: http://stackoverflow.com/questions/4788381/getting-cant-connect-through-socket-tmp-mysql-when-installing-mysql-on-ma/5140849#5140849

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• Authenticating Active Directory Users to Mac OS X Mavericks Server L2TP VPN Service

  - by dean

  We have a Windows Server 2012 Active Directory Infrastructure that consists of two domain controllers. Bound to the Active Directory Domain is a Mac OS X Mavericks Server 10.9.3. The server runs Profile Manager and VPN Services. My Active Directory users are able to authenticate to the Profile Manager, but not the VPN. I have found several threads on other forums of other users reporting similar issues, here is just one of many references: https://discussions.apple.com/thread/5174619 It appears as though the issue is related to a CHAP authentication failure. Can anyone suggest what next troubleshooting steps I might take? Is there a way to liberalize the authentication mechanism to include MSCHAP? Here is an excerpt of the transaction from the logs. Please note the domain has been changed to example.com. Jun 6 15:25:03 profile-manager.example.com vpnd[10317]: Incoming call... Address given to client = 192.168.55.217 Jun 6 15:25:03 profile-manager.example.com pppd[10677]: publish_entry SCDSet() failed: Success! Jun 6 15:25:03 --- last message repeated 2 times --- Jun 6 15:25:03 profile-manager.example.com pppd[10677]: pppd 2.4.2 (Apple version 727.90.1) started by root, uid 0 Jun 6 15:25:03 profile-manager.example.com pppd[10677]: L2TP incoming call in progress from '108.46.112.181'... Jun 6 15:25:03 profile-manager.example.com racoon[257]: pfkey DELETE received: ESP 192.168.55.12[4500]->108.46.112.181[4500] spi=25137226(0x17f904a) Jun 6 15:25:04 profile-manager.example.com pppd[10677]: L2TP connection established. Jun 6 15:25:04 profile-manager kernel[0]: ppp0: is now delegating en0 (type 0x6, family 2, sub-family 0) Jun 6 15:25:04 profile-manager.example.com pppd[10677]: Connect: ppp0 <--> socket[34:18] Jun 6 15:25:04 profile-manager.example.com pppd[10677]: CHAP peer authentication failed for alex Jun 6 15:25:04 profile-manager.example.com pppd[10677]: Connection terminated. Jun 6 15:25:04 profile-manager.example.com pppd[10677]: L2TP disconnecting... Jun 6 15:25:04 profile-manager.example.com pppd[10677]: L2TP disconnected Jun 6 15:25:04 profile-manager.example.com vpnd[10317]: --> Client with address = 192.168.55.217 has hung up

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• MySQL -- enable connection to remote server via local /tmp/mysql.sock

  - by Kevin

  Hey all, I run a shared hosting provider and we're looking to move to a High Availability (replicated across multiple datacenters) setup for our hosting. We have created a replicated MySQL setup with failover that works wonderfully, and we'd like to move all of our clients' databases to it. The only trouble is that we have many many customers, all of whom have configured their Wordpress, Drupal, etc. installations to connect to MySQL via a local socket, not to the address of the remove server. I would hate to have to go through manually and change the connection statement in all of our clients' sites. What I'd ideally love to see is a program that listens on /tmp/mysql.sock and forwards connections there to the remote server I specify. I've seen SQL Relay, but it seems to require that I hardcode all of the database names and usernames and passwords into its configuration file. This is not going to work for me because our users add new databases dynamically all of the time, and I'd rather not have to write code to updated SQLRelay's config file every time. Does anyone have an idea on how to do this? Alternatively, I'd accept idea on how to handle this at the PHP level. (i.e. redirect any attempted calls to mysql_connect() to use that hostname rather than localhost) Thanks, Kevin

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• does my machine configuration make sense?

  - by user1227914

  i couldn't think of a better place to ask this question, so here it goes. we're putting together a dedicated server for a website that will initially host the web server and the mysql database. as the website grows, we'll move the database to a different server and this machine will eventually only server the actual website. so the question is ...does my configuration look okay? it's the first time i'm building a server from scratch so i want to make sure i don't combine components that don't fit or something. things like ..do the drives i picked work for the hot swap ..etc. what do you guys think? am i good to go with this configuration? :) Chassis: Supermicro SuperServer 6016T-MTHF (6x DDR3 SDRAM - ECC DIMM 240-pin, 2x LGA1366 Socket, Power Provided: 600 Watt, 4 (free) x hot-swap - 3.5") CPU: Intel BX80614E5620 Xeon E5620 Processor - 4 Core, 2.40GHz, LGA 1366, 5.86GT/s QPI 12MB Cache, 64-Bit, 80W, HyperThreading Memory: Crucial CT51272BB1339 4GB PC10600 DDR3 Memory - 1333MHz, ECC, Registered, 1x4096MB (possibly 3 or 4 of them) Hard Drives: Western Digital WD2002FAEX Caviar Black Hard Drive - 2TB, 3.5", SATA 6Gbps, 7200 RPM, 64MB (possibly 2 or 3). thank you very much for any professional advice :)

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• MySQL 5.6 won't start on OS X - ambiguous option

  - by MaticPetek

  I would like to try MySQL 5.6 on my machine, but I cannot start it. I always get an error : [ERROR] /usr/local/mysql-5.6.5-m8-osx10.6-x86/bin/mysqld: ambiguous option '--log=/var/log/mysqld.log' (log-bin, log_slave_updates) my.cnf: [mysqld]<br/> pid-file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/mysql.pid<br/> log-error=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-error.log<br/> log-slow-queries=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-slowquery.log<br/> log-bin=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-bin.log<br/> general_log_file=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql-general_log_file.log<br/> log=/usr/local/mysql-5.6.5-m8-osx10.6-x86/data/mysql.log<br/> I try to set "log" and "log-bin" paramether in my.cnf file and also as start parameters for mysqld, but with no luck. Any idea what I can do? Thank you. My environment: OS X 10.6.8 mysql-5.6.5-m8-osx10.6-x86 (not _x64 version) Note: I'm also running Mysql 5.5 on this machine (different port and socket). I also try to stop this instance but I get the some error.

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• How to run VisualSvn Server on port 443 running IIS on same server?

  - by Metro Smurf

  Server 2008 R2 SP1 VisualSvn Server 2.1.6 The IIS server has about 10 sites. One of them uses https over port 443 with the following bindings: http x.x.x.39:80 site.com http x.x.x.39:80 www.site.com https x.x.x.39:443 VisualSvn Server Properties server name: svn.SomeSite.com server port: 443 Server Binding: x.x.x.40 No sites on IIS are listening to x.x.x.40. When starting up VisualSvn server, the following errors are thrown: make_sock: could not bind to address x.x.x.40:443 (OS 10013) An attempt was made to access a socket in a way forbidden by its access permissions. no listening sockets available, shutting down When I stop Site.com on IIS, then VisualSvn Server starts up without a problem. When I bind VisualSvn server to port 8443 and start Site.com, then VisualSvn Server starts without a problem. My goal is to be able to access the VisualSvn Server with a normal url, i.e., one that does't use a port number in the address: https://svn.site.com vs https://svn.site.com:8443 What needs to be configured to allow VisualSvn Server to run on port 443 with IIS running on the same server?

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• Why is /usr/bin/env permission denied to rails server?

  - by Eric Hopkins

  I've just set up rails on an apache server running on Ubuntu, and when I try to go to the root page it gives this error: /usr/bin/env: bash: Permission denied env and all the directories in the path all have permissions 755. I tried setting env to have permissions 777 but still got the same error. Rails is running as "nobody". Why is this happening? I don't know what else to try. In /etc/apache2/sites-available/api.conf: <VirtualHost *:80> ServerName api.thinknation.ca ServerAlias api.thinknation.ca DocumentRoot /var/www/api/public ErrorLog /var/www/logs/error.log CustomLog /var/www/logs/access.log combined RailsSpawnMethod smart <Directory /var/www/api/public> # This relaxes Apache security settings. AllowOverride all # MultiViews must be turned off. Options -MultiViews -Indexes # Uncomment this if you're on Apache >= 2.4: Order allow,deny Allow from all #Require all granted </Directory> </VirtualHost> From config/database.yml in my rails directory (with sensitive user names and passwords omitted): default: &default adapter: mysql2 encoding: utf8 pool: 5 username: root password: socket: /var/run/mysqld/mysqld.sock development: <<: *default database: api_development test: <<: *default database: api_test production: <<: *default url: <%= ENV['DATABASE_URL'] %> database: api username: ------------ password: ------------ Not sure what other details or files are relevant, I will add them if needed.

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• Issue with InnoDB engine while enabling and [ skip-innodb ] - [ERROR] Plugin 'InnoDB' init function returned error

  - by Ahn

  How to enable InnoDB, which was previously disabled with skip-innodb option. Case 1: Disabled the innodb with skip-innodb option and show engines givens as below. Engine | Support ... | InnoDB | NO ...... Case 2: As I want to enable the innodb, I commanded the #skip-innodb option and restarted. But now the show engines even not showing the InnoDB engine in the list. ? Mysql Version : 5.1.57-community-log OS : CentOS release 5.7 (Final) Log: 120622 13:06:36 InnoDB: Initializing buffer pool, size = 8.0M 120622 13:06:36 InnoDB: Completed initialization of buffer pool InnoDB: No valid checkpoint found. InnoDB: If this error appears when you are creating an InnoDB database, InnoDB: the problem may be that during an earlier attempt you managed InnoDB: to create the InnoDB data files, but log file creation failed. InnoDB: If that is the case, please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html 120622 13:06:36 [ERROR] Plugin 'InnoDB' init function returned error. 120622 13:06:36 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120622 13:06:36 [Note] Event Scheduler: Loaded 0 events 120622 13:06:36 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.57-community-log' socket: '/data/mysqlsnd/mysql.sock1' port: 3307 MySQL Community Server (GPL)

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