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check open ports without netstat or lsof

prevents replace an existing file by mistake
Use set +o noclobber and you will be able to replace files again

recursive transform all contents of files to lowercase
In this way it doesn't have problems with filenames with spaces.

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

convert ascii string to hex
just a bit simpler

Convert JSON to YAML
Requires installing json2yaml via npm: npm install -g json2yaml (can also pipe from stdin) Ref: https://www.npmjs.com/package/json2yaml

Ultimate current directory usage command
Based on the MrMerry one, just add some visuals to differentiate files and directories

find external links in all html files in a directory list
Just a handy way to get all the unique links from inside all the html files inside a directory. Can be handy on scripts etc.

Matrix Style

Play random music from blip.fm

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