Commands by caruccio (1)

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Copy the sound content of a video to an mp3 file
-vn removes tha video content, the copy option tells ffmpeg to use the same codec for generating the output

Connect to TCP port 5000, transfer data and close connexion.
With no '-q 0' switch, nc simply waits, and whatever awaits the data hangs.

exclude a column with awk
Here's an awk alternative, for those lacking the version of cut with the --complement argument.

(Git) Revert files with changed mode, not content
I sometimes (due to mismanagement!) end up with files in a git repo which have had their modes changed, but not their content. This one-liner lets me revert the mode changes, while leaving changed-content files be, so I can commit just the actual changes made.

Execute a command before display the bash prompt
For example, if you are the type who type ls very often, then $ PROMPT_COMMAND=ls will ls after every command you issue.

Convert a Python interactive session to a python script
Used to copy and paste a terminal buffer of a python interactive session into an editor

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

check open ports without netstat or lsof

va - alias for editing aliases
When setting up a new aliases file, or having creating a new file.. About every time after editing an aliases file, I source it. This alias makes editing alias a bit easier and they are useful right away. Note if the source failed, it will not echo "aliases sourced". Sub in vi for your favorite editor, or alter for ksh, sh, etc.

View a file with less, starting at the end of the file
The same as typing 'less filename' then 'G' or '>' or the END key. Comes in handy with shell scripts or aliases: alias weblog='less +G /var/log/httpd/access_log' alias errlog='less +G /var/log/httpd/error_log'


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