Commands by MelissaPerez (0)

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Make sure your script runs with a minimum Bash version
If you use new features of a certain Bash version in your shell script, make sure that it actually runs with the required version.

Suspend to ram

list files recursively by size

Watch command
Repeat command after every 2 secs

Find if $b is in $a in bash
Find if $b is in $a in bash

watch iptables counters
This will allow you to watch as matches occur in real-time. To filter out only ACCEPT, DROP, LOG..etc, then run the following command: watch 'iptables -nvL | grep -v "0 0" && grep "ACCEPT"' The -v is used to do an inverted filter. ie. NOT "0 0"

Losslessly rotate videos from your phone by 90 degrees.
Takes all the .3gp files in the directory, rotates them by 90 degrees, and saves them in the lossless ffv1 encoding. If this rotates in the wrong direction, you may want transponse=1 Re-encoding to ffv1 may result in a significant increase in file size, as it is a lossless format. Other applications may not recognize ffv1 if they don't use ffmpeg code. "huffyuv" might be another option for lossless saving of your transformations. The audio may be re-encoded as well, if the encoding used by your 3gp file doesn't work in a avi container.

ssh X tunneling over multiple ssh hosts (through ssh proxy)
Simply makes it possible to launch any X application residing on sshhost through sshproxy and display it on your screen where ever you are.

display a smiling smiley if the command succeeded and a sad smiley if the command failed
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

Display GCC Predefined Macros
doesn't need /dev/null

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