Commands by gean01 (6)

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ROT13 using the tr command

Join the content of a bash array with commas
This type of join is clearly documented in the bash manual. Only the first character of IFS is used for the delimiter.

Query well known ports list
Uses the file located in /etc/services

Diff two directories by finding and comparing the md5 checksums of their contents.
Compares the md5 checksums of the contents of two directories, outputting the checksum and filename where any files differ. Shows only the file name, not the full path.

Get count of kilobytes brew cleanup would free

delete file name space
delete file name space the rename is rename perl version

Remove all backup files in my home directory
I use this simple command for remove all backup files generated usually by editors like Vim and Emacs.

display a one-liner of current nagios exit statuses. great with netcat/irccat

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.

FInd the 10 biggest files taking up disk space


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