This command adds the numbers 10, 12, 14 to a bunch of mp3's in the current working directory. You can then run the command replacing the inital i=10 with i=11 to add 11,13,15 in another directory then mv the files together and the first files interweave with the second group of files. I used this to weave a backlog of a podcast with other podcast so I didn't get sick of one while I was catching up. I started at 10 because printf blows up with 0 padded numbers 08 and 09 which kind of makes the printf command redundant as it was used to pad numbers 1 - 9 so they would come first and not get sorted incorrectly

Returns the index of the last element in the array.

Requires html2text. Print bad, but often funny commit messages from whatthecommit.com

If you have many screen sessions, it can be difficult to find the id of the one you just detached from so you can re-attach using `screen -x -S `

The only pre-requisite is jq (and curl, obviously).

The other version used grep, but jq is much more suited to JSON parsing than that.

This runs a command continuously, restarting it if it exits. Sort of a poor man's daemontools. Useful for running servers from the command line instead of inittab.

This is a simple but useful command to search for multiple terms in a file at once. This prevents you from having to do mutliple grep's of the same file.

One of my friends committed his code in the encoding of GB2312, which broke the build job. I have to find his code and convert.

Sometimes you might need to have two copies of data that is in tar. You might unpack, and then copy, but if IO is slow, you might lower it by automatically writing it twice (or more times)

quivalent to

Add -n to last command to restrict to last num logins, otherwise it will pull all available history.

This command will delete all branches in your git repository other than next and master. I use this to cleanup my git repos after making multiple branches and merging them back into next. It's much faster than individually deleting each expired branch using:

show physical disk using, except tmpfs, gvfs, and so on.

Batch Convert MP3 Bitrate to xxxkbps, all the new files will be placed in a folder called "save". Please replace xxx with the desired bitrate. WARNING!!! This will erase any tag information; this is where Picard or EasyTAG will come in handy.

finds all forms instanciated into a symfony project, pruning svn files.

I found Flash eating one of my CPUs after resume, the command above will help with that. For optional kicks you can put it into a script in /etc/pm/sleep.d/ (aspect in #swhack wrote this for me)

This command works at least in 9.04+

Deletes capistrano-style release directories (except that there are dashes between the YYYY-MM-DD)

After installing Termbeamer (see termbeamer.com) you can use it to share a terminal session with one or more others even from behind a firewall or NAT.

Undo accidental file add to mercurial.

This command undo file adds to all recent adds