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• OpenVZ multiple networks on CTs

  - by picca

  I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public interface). But I can't get CTs to get access to eth1 (private network). I tried: # on HN vzctl set 101 --ipadd 192.168.1.101 --save vzctl enter 101 ping 192.168.1.2 # no response here ifconfig # on CT returns lo (127.0.0.1), venet0 (127.0.0.1), venet0:0 (95.168.xxx.xxx), venet0:1 (192.168.1.101) I believe that the main problem is that all packets flows through eth0 on HN (figured out using tcpdump). So the problem might be in routes on HN. Or is my logic here all wrong? I just need access to both interfaces (networks) on HN from CTs. Nothing complicated.

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• Better antivirus for Windows Server 2008 R2 x64 VPS

  - by raja

  I have only one VPS with Windows Server 2008 R2 x64 and want to buy an Antivirus. I tried NOD32 but they do not give less than 5 users in business edition (I have only one server). Kaspersky may be another solution but whether should i go for Internet Security or Anti-virus? I have few website hosted on this server and user have ability to upload .jpg, .gif, .zip files in few of the folders. Apart from above two any other suggestions on Antivirus that works well on above configuration and available for only one user? Thanks

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• Optimizing MySQL for small VPS

  - by Chris M

  I'm trying to optimize my MySQL config for a verrry small VPS. The VPS is also running NGINX/PHP-FPM and Magento; all with a limit of 250MB of RAM. This is an output of MySQL Tuner... -------- General Statistics -------------------------------------------------- [--] Skipped version check for MySQLTuner script [OK] Currently running supported MySQL version 5.1.41-3ubuntu12.8 [OK] Operating on 64-bit architecture -------- Storage Engine Statistics ------------------------------------------- [--] Status: -Archive -BDB -Federated +InnoDB -ISAM -NDBCluster [--] Data in MyISAM tables: 1M (Tables: 14) [--] Data in InnoDB tables: 29M (Tables: 301) [--] Data in MEMORY tables: 1M (Tables: 17) [!!] Total fragmented tables: 301 -------- Security Recommendations ------------------------------------------- [OK] All database users have passwords assigned -------- Performance Metrics ------------------------------------------------- [--] Up for: 2d 11h 14m 58s (1M q [8.038 qps], 33K conn, TX: 2B, RX: 618M) [--] Reads / Writes: 83% / 17% [--] Total buffers: 122.0M global + 8.6M per thread (100 max threads) [!!] Maximum possible memory usage: 978.2M (404% of installed RAM) [OK] Slow queries: 0% (37/1M) [OK] Highest usage of available connections: 6% (6/100) [OK] Key buffer size / total MyISAM indexes: 32.0M/282.0K [OK] Key buffer hit rate: 99.7% (358K cached / 1K reads) [OK] Query cache efficiency: 83.4% (1M cached / 1M selects) [!!] Query cache prunes per day: 48301 [OK] Sorts requiring temporary tables: 0% (0 temp sorts / 144K sorts) [OK] Temporary tables created on disk: 13% (27K on disk / 203K total) [OK] Thread cache hit rate: 99% (6 created / 33K connections) [!!] Table cache hit rate: 0% (32 open / 51K opened) [OK] Open file limit used: 1% (20/1K) [OK] Table locks acquired immediately: 99% (1M immediate / 1M locks) [!!] InnoDB data size / buffer pool: 29.2M/8.0M -------- Recommendations ----------------------------------------------------- General recommendations: Run OPTIMIZE TABLE to defragment tables for better performance Reduce your overall MySQL memory footprint for system stability Enable the slow query log to troubleshoot bad queries Increase table_cache gradually to avoid file descriptor limits Variables to adjust: *** MySQL's maximum memory usage is dangerously high *** *** Add RAM before increasing MySQL buffer variables *** query_cache_size (> 64M) table_cache (> 32) innodb_buffer_pool_size (>= 29M) and this is the config. # # The MySQL database server configuration file. # # You can copy this to one of: # - "/etc/mysql/my.cnf" to set global options, # - "~/.my.cnf" to set user-specific options. # # One can use all long options that the program supports. # Run program with --help to get a list of available options and with # --print-defaults to see which it would actually understand and use. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html # This will be passed to all mysql clients # It has been reported that passwords should be enclosed with ticks/quotes # escpecially if they contain "#" chars... # Remember to edit /etc/mysql/debian.cnf when changing the socket location. [client] port = 3306 socket = /var/run/mysqld/mysqld.sock # Here is entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. Both versions are currently parsed. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] # # * Basic Settings # # # * IMPORTANT # If you make changes to these settings and your system uses apparmor, you may # also need to also adjust /etc/apparmor.d/usr.sbin.mysqld. # user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer = 32M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 sort_buffer_size = 4M read_buffer_size = 4M myisam_sort_buffer_size = 16M # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP max_connections = 100 table_cache = 32 tmp_table_size = 128M #thread_concurrency = 10 # # * Query Cache Configuration # #query_cache_limit = 1M query_cache_type = 1 query_cache_size = 64M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. # As of 5.1 you can enable the log at runtime! #general_log_file = /var/log/mysql/mysql.log #general_log = 1 log_error = /var/log/mysql/error.log # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log #long_query_time = 2 #log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # * InnoDB # # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. # Read the manual for more InnoDB related options. There are many! # # * Security Features # # Read the manual, too, if you want chroot! # chroot = /var/lib/mysql/ # # For generating SSL certificates I recommend the OpenSSL GUI "tinyca". # # ssl-ca=/etc/mysql/cacert.pem # ssl-cert=/etc/mysql/server-cert.pem # ssl-key=/etc/mysql/server-key.pem [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M # # * IMPORTANT: Additional settings that can override those from this file! # The files must end with '.cnf', otherwise they'll be ignored. # !includedir /etc/mysql/conf.d/ The site contains 1 wordpress site,so lots of MYISAM but mostly static content as its not changing all that often (A wordpress cache plugin deals with this). And the Magento Site which consists of a lot of InnoDB tables, some MyISAM and some INMEMORY. The "read" side seems to be running pretty well with a mass of optimizations I've used on Magento, the NGINX setup and PHP-FPM + XCACHE. I'd love to have a kick in the right direction with the MySQL config so I'm not blindly altering it based on the MySQLTuner without understanding what I'm changing. Thanks

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• Changing the mac address in a libvirt xml config file breaks network connectivity for the guest

  - by foob

  I'm using Xen with libvirt and trying to set it up on a bridged interface. I am able to install an OS and everything works as I would expect. If I save the xml output from "virsh dumpxml guest", edit the mac address for the interface, and then define the domU with this new xml file I find that traffic is no longer forwarded from the vif0.0 interface to br0. The ifcfg-eth0 file on the guest was automatically updated to reflect the new mac address and the ifconfig output looks the same. Does anyone know why this is happening or how to properly change the mac address for a libvirt configuration?

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• Different block sizes for partition and underlying logical disk on HP Raid Controller (Linux)

  - by Wawrzek

  Following links collected in this thread I started to check blockdev and found the following output indicating different sizes for partition c0d9p1 and the underlying device (c0d9): [root@machine ~]# blockdev --report /dev/cciss/c0d9 RO RA SSZ BSZ StartSec Size Device rw 256 512 4096 0 3906963632 /dev/cciss/c0d9 [root@machine ~]# blockdev --report /dev/cciss/c0d9p1 RO RA SSZ BSZ StartSec Size Device rw 256 512 2048 1 3906959039 /dev/cciss/c0d9p1 We have a lot of small files, so yes the block size is smaller than normal. The device is a logical driver on an HP P410 raid controller, simple disk without any raid - RAID 0 on one disk to be precise. (Please note that above configuration is a feature not a bug). Therefore, I have the following questions. Can the above discrepancy in the block size affect disk performance? Can I control the block size using hpacucli?

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• Unable to connect to the Report Server

  - by pghcpa

  Win/7 Professional SQL Server 2008 R2 Express Reporting Services Configuration Manager When I launch it, shows correct Server Name, but report server instance is blank. When I press FIND I get: "Unable to connect to the Report Server " This is my development workstation, so no IIS installed. Seems to work fine on XP. SSMS works fine - no issues. I tried uninstalling SQL Server completely, rebooting, reinstalling a fresh download. Same result. I've googled every article I can find - nothing. Can anyone point me in the right direction in case you've come across this yourself? Thanks.

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• Qmail does not forward mail to a specific domain

  - by jahufar

  Hi I have a dedicated hosting account with GoDaddy.com. I've pointed my domain's email to work with Google apps. The server has qmail running and it forwards email to all domains just fine except for MY domain (mydomain.com) - it says 550 User xxx not found in mydomain.com I believe it thinks I've hosted email on the server itself (not gmail) and it's trying to validate if [email protected] exists on my server (which is not the case since it's all handled by google apps). How do I make it forward mail to all domains? Thank you :) EDIT: I would only need it forwarding emails if the connection originates from 127.0.0.1 - which I believe is the default way it's configured. So to clarify: I just need a purely forwarded configuration so my PHP scripts have the ability to send email.

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• How much should a Systems Administrator be making?

  - by Curtis

  Hello, I'm a Sys Admin for a small (but successful and growing) company (~60 employees). I've got roughly 5-6 years of actual sys admin experience, plus another 5+ years of lower level work in the industry. I'm responsible for most everything above a helpdesk level in the company (server[windows]/network[cisco]/firewall/SAN[emc] setup/configuration/maintenance/troubleshooting), lead many projects, analyze system data -- I'm sure you've heard it all before...I have a bunch of certs, most are just "nice to have", but the ones that actually apply to my role are CCNA, MSCE, VCP (VMware). If things go wrong, I'm first in line to resolve the issue. I'm not management (no one reports to me). I've seen many of these sorts of questions online before, and I know the typical response is "too many variables, depends on location, industry type" etc etc. I'm just wondering (ballpark) what I should be looking for. I've tried to give as much detail as I can, but if I'm missing something, I'd be glad to post it. Thanks anyone.

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• Workflow: Operate Zones

  - by Owen Allen

  The Operate Zones workflow is another of the workflow documents that we introduced recently. It follows naturally after the Deploy Oracle Solaris 11 Zones workflow that I talked about last week, so I thought I'd talk about it next. This workflow is less linear than the zone deployment workflow. It's built around this image: The left side shows you the prerequisites for zone operation: you have to deploy libraries and deploy either Oracle Solaris 10 or 11 zones - whichever type you want to manage using this workflow. Once you have the zones deployed, you can begin to operate them. If you want to associate resources with the global zone, the workflow directs you to the Exploring Your Server Pools how-to, which talks about adding global zones to server pools and associating libraries and network resources with them. Otherwise, it directs you to a set of how-tos about zone management: Managing the Configuration of a Zone, which explains how to add storage, edit zone attributes, and connect zones to networks; Lifecycle Management of Zones, which explains how to halt, shut down, boot, reboot, or delete a zone; and Migrating Zones, which explains how to move a zone to a new global zone in the same server pool. Finally, it directs you to the Update Oracle Solaris workflow when you want to update your zones, and to the Monitor and Manage Incidents workflow to learn more about monitoring your assets.

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• Secondary DHCP server won't start on Centos 6.2

  - by Slowjoe

  I'm trying to create a backup DHCP server. Server times are in sync. Primary server starts fine. Secondary server won't start. Error from /var/log/messages is: Sep 15 14:47:45 stream dhcpd: Copyright 2004-2010 Internet Systems Consortium. Sep 15 14:47:45 stream dhcpd: All rights reserved. Sep 15 14:47:45 stream dhcpd: For info, please visit https://www.isc.org/software/dhcp/ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 25: invalid statement in peer declaration Sep 15 14:47:45 stream dhcpd: #011max-response-default Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 41: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 49: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: WARNING: Host declarations are global. They are not limited to the scope you declared them in. Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 70: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: /etc/dhcp/dhcpd.conf line 78: failover peer dhcp-failover: not found Sep 15 14:47:45 stream dhcpd: failover peer "dhcp-failover" Sep 15 14:47:45 stream dhcpd: ^ Sep 15 14:47:45 stream dhcpd: Configuration file errors encountered -- exiting Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: This version of ISC DHCP is based on the release available Sep 15 14:47:45 stream dhcpd: on ftp.isc.org. Features have been added and other changes Sep 15 14:47:45 stream dhcpd: have been made to the base software release in order to make Sep 15 14:47:45 stream dhcpd: it work better with this distribution. Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: Please report for this software via the CentOS Bugs Database: Sep 15 14:47:45 stream dhcpd: http://bugs.centos.org/ Sep 15 14:47:45 stream dhcpd: Sep 15 14:47:45 stream dhcpd: exiting. Config file contents: # DHCP Server Configuration file. # see /usr/share/doc/dhcp*/dhcpd.conf.sample # see 'man 5 dhcpd.conf' # option domain-name "eng.foo.com"; option domain-name-servers ns0.eng.foo.com, ns1.eng.foo.com; option ntp-servers ntp.eng.foo.com; #option time-servers ntp.eng.foo.com; default-lease-time 3600; max-lease-time 7200; authoritative; log-facility local7; failover peer "dhcp-failover" { secondary; address 10.0.1.70; port 647; peer address 10.0.1.11; peer port 647; max-response-default 30; max-unacked-updates 10; load balance max seconds 3; } # # Management subnet # subnet 10.0.0.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option broadcast-address 10.0.0.255; option routers 10.0.0.1; option domain-search "eng.foo.com", "foo.com"; # Unknown clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 300; range 10.0.0.240 10.0.0.249; allow unknown-clients; } # Known clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 28800; range 10.0.0.150 10.0.0.199; deny unknown-clients; } include "/etc/dhcp/dhcpd.conf-engmgmt"; } # # Data subnet # subnet 10.0.1.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option broadcast-address 10.0.1.255; option routers 10.0.1.1; option domain-search "eng.foo.com", "foo.com"; # Unknown clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 300; range 10.0.1.240 10.0.1.249; allow unknown-clients; } # Known clients get this pool pool { failover peer "dhcp-failover"; max-lease-time 28800; range 10.0.1.150 10.0.1.199; deny unknown-clients; } # For centos network installs if substring (option vendor-class-identifier, 0, 8) = "anaconda" { filename "/autohome/distro/ks/"; next-server eng-data.eng.foo.com; } # For PXE network installs if substring (option vendor-class-identifier, 0, 9) = "PXEClient" { filename "pxelinux.0"; next-server eng-data.eng.foo.com; } # For KVM PXE network installs if substring (option vendor-class-identifier, 0, 9) = "Etherboot" { filename "pxelinux.0"; next-server eng-data.eng.foo.com; } include "/etc/dhcp/dhcpd.conf-engdata"; }

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• Caching of path environment variable on windows?

  - by jwir3

  I'm assisting one of our testers in troubleshooting a configuration problem on a Windows XP SP3 system. Our application uses an environment variable, called APP_HOME, to refer to the directory where our application is installed. When the application is installed, we utilize the following environment variables: APP_HOME = C:\application\ PATH = %PATH%;%APP_HOME%bin Now, the problem comes in that she's working with multiple versions of the same application. So, in order to switch between version 7.0 and 8.1, for example, she might use: APP_HOME = C:\application_7.0\ (for 7.0) and then change it to: APP_HOME = C:\application_8.1\ (for 8.1) The problem is that once this change is made, the PATH environment variable apparently still is looking at the old expansion of the APP_HOME variable. So, for example, after she has changed APP_HOME, PATH still refers to the 7.0 bin directory. Any thoughts on why this might be happening? It looks to me like the PATH variable is caching the expansion of the APP_HOME environment variable. Is there any way to turn this behavior off?

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• Is there a way to import email from the raw email files?

  - by Chris Schmitz

  I have a client who recently switched hosts. When they switched hosts they didn't backup their email and updated their configuration settings so they lost everything. However, I was able to log in to their old hosting control panel and download their mail folder. I am wondering if there is a way to extract their emails and/or contacts from the files. I'm not sure what type of files they are, there is no extension, but the folder directory is structured like this: mail/ .Drafts/ .Sent/ .Trash/ cur/ new/ theirdomain.com/ tmp/ [email protected] maildir Inside of the theirdomain.com folder, there is a folder for each account and inside of that is a folder called "cur" which has a whole bunch of files with names like 1292945327.H169813P25958.uscentral21.myserverhosts.com,S=10117/2,S and if I preview those files I can see the actual email messages inside of them but I have no idea how to get that information from those files to an email client. Anyone know of a way to work with these files? Thanks in advance for any insight you can share!

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• second ip address on the same interface but on a different subnet

  - by fptstl

  Is it possible in CentOS 5.7 64bit to have a second IP address on one interface (eg. eth0) - alias interface configuration - in a different subnet? Here is the original config for eth0 more etc/sysconfig/network-scripts/ifcfg-eth0 # Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express DEVICE=eth0 BOOTPROTO=static BROADCAST=192.168.91.255 HWADDR=00:1D:09:FE:DA:04 IPADDR=192.168.91.250 NETMASK=255.255.255.0 NETWORK=192.168.91.0 ONBOOT=yes And here is the config for eth0:0 more etc/sysconfig/network-scripts/ifcfg-eth0:0 # Broadcom Corporation NetXtreme BCM5721 Gigabit Ethernet PCI Express DEVICE=eth0:0 BOOTPROTO=static BROADCAST=10.10.191.255 DNS1=10.10.15.161 DNS2=10.10.18.36 GATEWAY=10.10.191.254 HWADDR=00:1D:09:FE:DA:04 IPADDR=10.10.191.210 NETMASK=255.255.255.0 NETWORK=10.39.191.0 ONPARENT=yes How would the resolv.conf file should change since there are two different gateways? Any other change needed?

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• How to enable mod_info in Apache?

  - by Amit Nagar

  I gone through the apache guide to enable to mod_info. As per doc: To configure mod_info, add the following to your httpd.conf file. Location /server-info SetHandler server-info /Location You may wish to use mod_access inside the directive to limit access to your server configuration information: Location /server-info SetHandler server-info Order deny,allow Deny from all Allow from yourcompany.com Location Once configured, the server information is obtained by accessing http://your.host.dom/server-info In my case the this link is not giving any info. Http 404 NOT FOUND error Is there anything I need to install as mod_info.c or something ? Is there anything i need to put as AddModule or something ? In Error log : File does not exist: /usr/local/apache2/htdocs/example1/server-info I have 3 virtual host. One of this as default which use example1 as Docroot dir. I am not sure where this page (server-info) should be ? in case of server-status, it's working fine

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• What ports to open in aws security group for aws?

  - by HarrisonJackson

  I am building the backend for a turn based gamed. My experience is mostly with a lamp stack; I've dabbled in nginx on a node side project. I just read Scaling PHP Applications by Stephen Corona of Twit Pic. He recommends an nginx server over apache. He says that his ubuntu machine has 32768-61000 ports open. On AWS do I need to modify my security to group to allow access to those ports? How do I ensure nginx is taking full advantage of this configuration?

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• nginx regex characters that require quoting?

  - by Michael Louis Thaler

  So I was configuring nginx today and I hit a weird problem. I was trying to match a location like this: location ~ ^/([0-9]+)/(.*) { # do proxy redirects } ...for URLs like "http://my.domain.com/0001/index.html". This rule was never matching, despite the fact that it by all rights should. It took me awhile to figure out, based on this documentation, that some characters in regexes need to be quoted. The problem is, the documentation is for rewrites, and it specifically calls out curly braces, not square brackets. After a fair bit of experimentation that involved a lot of swearing, I discovered that I could fix the problem by quoting the regex like so: location ~ "^/([0-9]+)/(.*)" { # do proxy redirects } Is there a list somewhere of characters that nginx requires quoting regexes with? Or could there be something else going on here that I'm totally missing? This is my first nginx configuration job, so it's very possible I've misunderstood something...

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• How to enter into BusyBox when booting?

  - by ???

  I have occasionally installed cloud-init package in Ubuntu, which blocks me from booting. Neither recovery mode works. Because cloud-init installed some upstart job configuration. So I want to enter into busybox to remove /etc/init/cloud-init*.conf, but it seems like no way to do it. I can press Ctrl+Alt+SysRq which brings on a rough hack menu, but there is no busybox option. So is it possible? My CDROM is broken so I can't use Live CD too.

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• unable to get local issuer certificate - Ubuntu 11.04

  - by user1443867

  I'm facing a strange issue. My vps from Linode has no issue connecting to apple push server with following command. openssl s_client -connect gateway.sandbox.push.apple.com:2195 -cert Test_dev_apns_cert.pem -key Test_dev_apns_key.pem However, I was using the same pem files with above command testing from my another low budget vps and I'm getting this: Verify return code: 20 (unable to get local issuer certificate) Both are running Ubuntu 11.04 and installed LAMP as usual. No special configuration is done to both servers for SSL. Am I missing something here?

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• webmin bind issue- error when i try to start bind

  - by Arvind

  I am setting up a domain = mydomain.com with 2 nameservers ns1.mydomain.com and ns2.mydomain.com in Webmin - BIND. For this, I have registered 2 child nameservers at my domain registrar, and in Webmin-Bind I have set up a new zone for this domain. In this zone, i have specified 2 nameserver records- one each for ns1 and ns2. Also, I have defined 2 address records- one each for ns1.mydomain.com -> IP Address #1 and for ns2.mydomain.com -> IP Address #2 However when I try to start BIND in Webmin, I get the following error-- Failed to start BIND : Starting named: Error in named configuration: zone mydomain.com/IN: has no NS records zone mydomain.com/IN: not loaded due to errors. _default/mydomain.com/IN: bad zone [FAILED]

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• Linux: multiple network connections - 3G/4G / Wifi / LAN / etc; how can i set a preferred network connection to use?

  - by Alex

  I've been looking at how I can setup a laptop that has multiple network interfaces, but a problem exists if all the connections are active, i.e. 3G, WiFi and LAN are all connected, I would like it to default to LAN. I would like to set "weights" or "priority" to each connection, so that if the LAN is unplugged, it'll default to WiFi - if its in range and working, otherwise, it'll switch and use the 3G dongle; I've been looking around and I can see that the "metric" counter for route isn't being used for recent kernels. I thought that would be able to set the preferred gateway / connections - but according to the man page: man route: OUTPUT Metric The 'distance' to the target (usually counted in hops). It is not used by recent kernels, but may be needed by routing daemons. So I'm confused, are there any scripts / apps / anything that can detect active network connections, and by way of configuration, send my default gateway network traffic through that interface if its active / alive?

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• Partimage and autocheck problem when restoring Windows XP from image

  - by Xolstice

  I'm trying to create an image of Windows XP and clone it to several partitions on the same hard drive using Partimage. I seem to be running into a problem when I restore the image onto another partition - when I boot into the OS from the partition I just restored, it brings up this message during the boot sequence: autochk program not found - skipping autocheck, and then after this, the OS reboots the PC and the whole process repeats itself in an infinite loop. After doing some Google search, it is suggested that this loop was caused by the partition being hidden or the mountmgr.sys file is missing. I checked my configuration and verified that this was not the case. I'm just wondering: Has anyone else experienced this and is there a solution for it? Is this what happens when you try to restore the image to a different partition on the same hard disk or is Partimage itself the problem? Should I be trying out a different partition cloning software?

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• Ubuntu server failing daily

  - by deanvz

  Symptoms: Server becomes unresponsive - Increase in load, all services stop Loss of connectivity - Ping/SSH Flush MySQL hosts after reboot - As MySQL refuses new connections Intermittent Apache crashes Generally happens early morning hours - 2 days of the week are however excluded Changes made: Updated the OS - to Ubuntu 10.04.4 LTS Not sure if the MySQL server was also updated in the process Current MySQL version - mysql Ver 14.14 Distrib 5.1.63, for debian-linux-gnu (x86_64) using readline 6.1 Updated Plesk from 10.4.4 Update #47 to 11.0.9 Update #23 Rebooted on almost daily basis All crons stopped for the times corresponding to the server crashes Created a MySQL log to monitor the lock times on queries Possible causes: Failing hardware Incorrect software configuration (MySQL, Apache etc) Responsibilities: Small webserver Runs our billing system - WHMCS Responsible for CRONs Bulk-email solution - No delivery times coincide with server crashes Proposed solutions: Move machine over to VM Format and restore the Plesk server backup and take it from there? Side notes: Seems to be a general Apache failure across all our linux servers - Intermittent problem Are we doing something fundamentally wrong in the Apache config? (I understand that this is a secondary question, just making sure that it isnt possibly holding any relevance)

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• Postfix relay to multiple servers and multiple users

  - by Frankie

  I currently have postfix configured so that all users get relayed by the local machine with the exception of one user that gets relayed via gmail. To that extent I've added the following configuration: /etc/postfix/main.cf # default options to allow relay via gmail smtp_use_tls=yes smtp_sasl_auth_enable = yes smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt smtp_sasl_security_options = noanonymous # map the relayhosts according to user sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_maps # keep a list of user and passwords smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd /etc/postfix/relayhost_maps user-one@localhost [smtp.gmail.com]:587 /etc/postfix/sasl_passwd [smtp.gmail.com]:587 [email protected]:user-one-pass-at-google I know I can map multiple users to multiple passwords using smtp_sasl_password_maps but that would mean that all relay would be done by gmail where I specifically want all relay to be done by the localhost with the exception of some users. Now I would like to have a user-two@localhost (etc) relay via google with their own respective passwords. Is that possible?

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• Install DC again after removing on exchange server

  - by Kawharu

  I had a DC and Exchange 2010 installed on the same machine. I removed the DC role, and Exchange server went crazy. I tried to install the DC role again to fix the problem but ran into this error when running DCPROMO: Active Directory Domain Services could not create the NTDS Settings object for this Active Directory Domain Controller CN=NTDS Settings,CN=DC1,CN=Servers,CN=Manukau,CN=Sites,CN=Configuration,DC=AccessGroupnz,DC=com on the remote AD DC Server1.AccessGroupnz.com. Ensure the provided network credentials have sufficient permissions. "The DSA operation is unable to proceed because of a DNS lookup failure." Do you think I need to run this in an elevated command prompt, or change credentials somewhere to domain admin? Or is it something else?

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• Oracle Linux Partner Pavilion Spotlight

  - by Ted Davis

  With the first day of Oracle OpenWorld starting in less than a week, we wanted to showcase some of our premier partners exhibiting in the Oracle Linux Partner Pavilion ( Booth #1033) this year. We have Independent Hardware Vendors, Independent Software Vendors and Systems Integrators that show the breadth of support in the Oracle Linux and Oracle VM ecosystem. We'll be highlighting partners all week so feel free to come back check us out. Centrify delivers integrated software and cloud-based solutions that centrally control, secure and audit access to cross-platform systems, mobile devices and applications by leveraging the infrastructure organizations already own. From the data center and into the cloud, more than 4,500 organizations, including 40 percent of the Fortune 50 and more than 60 Federal agencies, rely on Centrify's identity consolidation and privilege management solutions to reduce IT expenses, strengthen security and meet compliance requirements. Visit Centrify at Oracle OpenWorld 2102 for a look at Centrify Suite and see how you can streamline security management on Oracle Linux.  Unify identities across the enterprise and remove the pain and security issues associated with managing local user accounts by leveraging Active Directory Implement a least-privilege security model with flexible, role-based controls that protect privileged operations while still granting users the privileges they need to perform their job Get a central, global view of audited user sessions across your Oracle Linux environment  "Data Intensity's cloud infrastructure leverages Oracle VM and Oracle Linux to provide highly available enterprise application management solutions.  Engineers will be available to answer questions about and demonstrate the technology, including management tools, configuration do's and don'ts, high availability, live migration, integrating the technology with Oracle software, and how the integrated support process works."    Mellanox’s end-to-end InfiniBand and Ethernet server and storage interconnect solutions deliver the highest performance, efficiency and scalability for enterprise, high-performance cloud and web 2.0 applications. Mellanox’s interconnect solutions accelerate Oracle RAC query throughput performance to reach 50Gb/s compared to TCP/IP based competing solutions that cap off at less than 12Gb/s. Mellanox solutions help Oracle’s Exadata to deliver 10X performance boost at 50% Hardware cost making it the world’s leading database appliance. Thanks for reviewing today's Partner spotlight. We will highlight new partners each day this week leading up to Oracle OpenWorld.

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