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Apply an xdelta patch to a file
xdelta is a command line program for delta encoding, which generates the difference between two files. This is similar to diff and patch, but it is targeted for binary files and does not generate human readable output. http://xdelta.org/

Show the command line for a PID, converting nulls to spaces and a newline
If you cat the file, all the parts of the command line are bunched up. If you use tr to convert the nulls to spaces, you're still left without a newline unless you add another step. This command does everything for you.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

E-mail a traditional Berkeley mbox to another recipient as individual e-mails.

Install pip with Proxy
Installs pip packages defining a proxy

Switch to the previous branch used in git(1)
Very useful if you keep switching between the same two branches all the time.

Make a directory named with the current date
Create a directory named with the current date in ISO 8601 format (yyyy-mm-dd). Useful for storing backups by date. The --iso switch may only work with GNU date, can use format string argument for other date versions.

This command provides more color variety for the rainbow-like appearance by generating random color codes from 16 to 231 for adb logcat.

Wrap text files on the command-line for easy reading
fold wraps text at 80 characters wide, and with the -s flag, only causes wrapping to occur between words rather than through them.

Do some learning...
compgen -c finds everything in your path.


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