http://www.halfgaar.net/backing-up-unix General notes about backup systems, useful when u need to explain something to other ppl, – use can use this notes instead of writing your own. (no info about “advanced” topics, like differential, incremental, reverse vs forward deltas, bare-metal recovery, check sums, etc. )
http://zumastor.org/man/ddsnap.8.html a way to ‘sync’ block devices in ‘rsync’ style. Useful to implement backup of xen VMs based on LVM volumes. Also see http://serverfault.com/questions/27397/sync-lvm-snapshots-to-backup-server
http://www.youtube.com/watch?v=n6DfoOrh-cs demo of the interface with comments for http://www.redhat.com/virtualization/rhev/server/
http://forum.nag.ru/forum/index.php?s=8b3a4967a6e80673cbe5518c91520d10&showtopic=53979&pid=482449&st=20&#entry482449 pieces of info about how to compile and use ipt_netflow kernel module on centos 5
http://www.robtex.com/ websites that provides a lot of useful info, like RBL (Relay Black Lists ), DNS, AS, BGP, etc
http://kbase.redhat.com/faq/docs/DOC-17338 writing udev rules for ethernet inteffaces
http://www.greensql.net/ SQL-proxy/filtering software for MySQL and PostgreSQL databases, used to prevent SQL-injection-like attacks, filter-out dangerous SQL, etc
http://engineering.twitter.com/ all sorts of system and software engineering info from Twitter. Also see http://twitter.com/about/opensource
http://www.ibm.com/developerworks/linux/library/l-libvirt/index.html useful article about “libvirt” - a common management interface for different visualization software
http://support.microsoft.com/default.aspx?scid=kb;en-us;317652 MS Exchange 2000 and 2003 do not allow users to create auto-reply/vacation/forwarding rules