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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 all installed PERL modules by CPAN
This command will give you the detailed information about the installed perl modules i.e. installed path, Link type, version, files etc.

Show a listing of open mailbox files (or whatever you want to modify it to show)

Show what PID is listening on port 80 on Linux

Lists installed kernels
no need for rpm, no need for piping to another command. also no real fu but lacking in unnecessary complexity and distro specific commands.

Equivalent to ifconfig -a in HPUX
Command is properly working on HP-UX 11.31

A command to post a message to Twitter that includes your geo-location and a short URL.
A command to post a message to Twitter that includes your geo-location and a short URL. The link shortening service is provide by TinyURL, the geo-location service is provided by HostIP and the IP address lookup service is provided by AppSpot. This is an upgrade of an of one of my previous contributions: http://tinyurl.com/yd2xtzv.

Capture all plaintext passwords

Clean way of re-running bash startup scripts.
This replaces the current bash session with a new bash session, run as an interactive non-login shell... useful if you have changed /etc/bash.bashrc, or ~/.bashrc If you have changed a startup script for login shells, use $ exec bash -l Suitable for re-running /etc/profile, ~/.bash_login and ~/.profile. edit: chinmaya points out that $ env - HOME=$HOME TERM=$TERM bash -s "exec bash -l" will clear any shell variables which have been set... since this verges on unwieldy, might want to use $ alias bash_restart='env - HOME=$HOME TERM=$TERM bash -s "exec bash -l"'

create a temporary file in a command line call
Sometimes you have a script that needs and inputfile for execution. If you don't want to create one because it may contain only one line you can use the `


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