Commands by unixx (2)

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Selecting a random file/folder of a folder
Also looks in subfolders

Search specified $TEXT1 and Replace that by specified arg ($TEXT2)

Terrorist threat level text

list block devices
Shows all block devices in a tree with descruptions of what they are.

Send an http HEAD request w/curl

Mount a disk image (dmg) file in Mac OSX
To unmount, replace "attach" with "eject"

Check which files are opened by Firefox then sort by largest size.
Check which files are opened by Firefox then sort by largest size (in MB). You can see all files opened by just replacing grep to "/". Useful if you'd like to debug and check which extensions or files are taking too much memory resources in Firefox.

Keep one instance of an irc chat client in a screen session
This command attempts to attach to existing irssi session, if one exists, otherwise creates one. I use "irc" because I use different irc clients depending on what system I am working on. Consistency is queen.

copy ACL of one file to another using getfacl and setfacl
If you copy windows file in e.g. cygwin the ACL might miss on the copied file. With this command you can copy the ACL of an existing file to another. WARNING: Existing ACL will get lost.

find your release version of your ubuntu / debian distro


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