Commands by Barabbas (1)

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See most used commands
It will return a ranked list of your most commonly-entered commands using your command history

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"

Display a markdown file in a new tab in firefox

Find out when your billion-second anniversary is (was).
Replace 12/31/1970 with your birth date.

Generat a Random MAC address
Generate a random MAC address with capital letters

Print the 10 deepest directory paths

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

Help shell find freshly installed applications (re: PATH)
Immediately after installing things into your PATH (e.g. under /usr/bin), currently open shells cannot find them ("zsh: command not found"). Use rehash to get the shell to rescan available executables.

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Use Perl like grep
Much better alternatives - grep-alikes using perl regexps. With more options, and nicer outputs.


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