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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"

list files recursively by size

Find the process you are looking for minus the grepped one
faster ;) but your idea is really cool

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

urldecoding

List last opened tabs in firefox browser

statistics in one line
In this example, file contains five columns where first column is text. Variance is calculated for columns 2 - 5 by using perl module Statistics::Descriptive. There are many more statistical functions available in the module.

find broken symbolic links
== remove broken links == find -L . -type l -exec rm -rf {} \; == how this work == "symbolic link; this is never true if the -L option or the -follow option is in effect, unless the symbolic link is broken. If you want to search for symbolic links when -L is in effect, use -xtype." -- manpage of find.

SSH Auto-login with password
You need to install "sshpass" for this to work. apt-get install sshpass

Get the 10 biggest files/folders for the current direcotry


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