Commands by Tenzer (1)

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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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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

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

diff current vi buffer edits against original file

Exclude multiple columns using AWK
Print all columns except the 1st and 3rd.

Merge several pdf files into a single file
merge a.pdf b.pdf and c.pdf and create ./out.pdf

Find all folder in /var that contains log in their path and have more than 10 files inside them, print the folder and the count
-L is for following symbolic links, it can be omitted and then you can find in your whole / dir

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"

Find files with root setuids settings

Download Englishword pronounciation as mp3 file

Take aWebcam Picture When the Mouse Moves
This takes a webcam picture every everytime the mouse is moved (waits 10 seconds between checking for movement) and stores the picture wherever you want it. Ideas: Use in conjunction with a dropbox type application to see who is using your computer Use /dev/input/mice if /dev/input/mouse* doesn't work Use the bones of this to make a simple screensaver


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