Useful Links : Live Migration: http://www.linux.com/archive/feed/55773
Archive for September, 2010
Miscellaneous useful websites about xen
Monday, September 27th, 2010Linux:How to force puppet client to download updates from puppet server
Friday, September 17th, 2010By default puppetd (puppet server) applies the client configuration; in 1800 seconds. If you have some emergency updates which has to be apply to every puppet clients instanly , you can do followings : (a) puppetrun (This commands run from the puppet server) SYNOPSIS Trigger a puppetd run on a set of hosts. USAGE [...]
Linux:InnoDB: Unable to lock ./ibdata1, error: 37
Tuesday, September 14th, 2010Ref: http://bugs.mysql.com/bug.php?id=47769 Database is located on the remote storage that mount via NFS. During mysql startup the following entries appear in the .err file: InnoDB: Unable to lock ./ibdata1, error: 37 Solution: mount -t nfs -o nolock IP:/data /data
Linux: Troubleshooting Redhat Cluster Suite
Wednesday, September 8th, 2010Ref:http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Configuration_Example_-_NFS_Over_GFS/NFS_GFS_Troubleshoot.html If you find that you are seeing error messages when you try to configure your system, or if after configuration your system does not behave as expected, you can perform the following checks and examine the following areas. * Connect to one of the nodes in the cluster and execute the clustat(8) command. This [...]
Linux:named: transfer of ‘domain.com/IN’ from #53: failed while receiving responses: permission denied
Friday, September 3rd, 2010When you setup a Slave Dns server and trying to transfer zone from master server, you might see problem as bellow : Sep 3 09:52:37 publicdns1.domani.local named[13635]: dumping master file: tmp-PKhZ6y6rRp: open: permission denied Sep 3 09:52:37 publicdns1.domain.local named[13635]: transfer of ‘domain.com/IN’ from 11.22.33.44#53: failed while receiving responses: permission denied Sep 3 09:52:37 publicdns1.domain.local named[13635]: [...]
How to run perl/Python script from Linux Apache server
Thursday, September 2nd, 2010For httpd.conf ( /usr/local/apache/conf – if you compile by source OR /etc/httpd/conf/httpd -: if you compile by yum) ScriptAlias /cgi-bin/ "/usr/local/apache/cgi-bin/" If you want to run cgi script from under your domain , example , www.fosiul.com/cgi-bin/test.cgi , do as bellow <VirtualHost *:80> ServerAdmin fosiul@example.co.uk DocumentRoot /usr/local/apache/htdocs/example/ ServerName www.example.co.uk ServerAlias example.co.uk ……………………………….. ……………………………….. <Directory "/usr/local/apache/htdocs/example/"> [...]
Linux:How to configure/secure public primary/secondary bind dns server
Wednesday, September 1st, 2010Localhost Resolver : (a) install bind yum install bind bind-chroot bind-devel (b) Copy named.conf and related files from /usr/share/doc/bind-9.3.6/sample/etc/ cp /usr/share/doc/bind-9.3.6/sample/etc/* /var/named/chroot/etc/ (c) File lists in /var/named/chroot/etc are as bellows : [root@publicdns1 etc]# ls localtime named.rfc1912.zones rndc.conf named.conf named.root.hints rndc.key Check the Ownership of files. Ownership should be root:named as bellow: [root@publicdns1 etc]# pwd /var/named/chroot/etc [...]