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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"

extracting audio and video from a movie
rips the audio and video stream of a movie. The two streams are stored separately.

Disable system bell in an X session
Execute this command in a terminal to disable the system-bell during X-session lifetime.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

print line and execute it in BASH
!# is the currennt line so far, by using !#:- you can go from the second arg (it's zero indexed) to the last ($) (did I understand the problem correctly?)

Email a file to yourself
This uses mutt to send the file, and doesn't require uuencode etc

Clear your history saved into .bash_history file!
Note the space before the command; that prevents your history eliminating command from being recorded. ' history -c && rm -f ~/.bash_history' Both steps are needed. 'history -c' clears what you see in the history command. 'rm -f ~/.bash_history' deletes the history file in your home directory.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Check whether laptop is running on battery or cable


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