Cool Linux Stuff: Live Resize of Libvirt Guest’s Disk Served as LVM Logical Volume on SAN Volume

Here is the situation: We have a FC SAN with one volume dedicated for virtual machines’ disks. That SAN volume is available on the server via 2 paths (two storage controllers, two FC switches and two HBAs) and failover is handled by multipath-tools. This SAN volume has no partition table but is a LVM’s physical … Read moreCool Linux Stuff: Live Resize of Libvirt Guest’s Disk Served as LVM Logical Volume on SAN Volume

Bash Does Not Support RegExps? Read The Fucking Manual!

I have stumbled on this again. There is so many places on the Net (for example Advanced Bash-Scripting Guide) where you can read that Bash does not support regular expression by itself and you have to use other tools (usually grep, sed and awk are mentioned) to match/replace with regex. Since regular expressions are part … Read moreBash Does Not Support RegExps? Read The Fucking Manual!