Commands by Quiryaki (1)

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Delete empty, 24-hours-old directories recursively, without consider hidden directories

Extract all 404 errors from your apache accesslog (prefix lines by occurrences number)

Use AWS CLI and JQ to get a list of instances sorted by launch time
Use the AWS CLI tools to generate a list instances, then pipe them to JQ to show only their launch time and instance id. Finally use sort to bring them out in runtime order. Find all those instances you launched months ago and have forgotten about.

Recursively find disk usage, sort, and make human readable (for systems without human-readable sort command)
Recursively find disk usage, sort, and make human readable: * For systems without human-readable sort command * awk, not perl

Count lines of code across multiple file types, sorted by least amount of code to greatest
Gives you a nice quick summary of how many lines each of your files is comprised of. (In this example, we just check .c, .h, .php and .pl). Since we just use wc -l to count, you'll just get a very rough estimate of how many lines of actual code there are. Use a more sophisticated algorithm instead if you need to.

resize all JPG images in folder and create new images (w/o overwriting)
Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

Look up a unicode character by name
No need for further filedes or substitution for splitting. Simply use read a b

Watch the size of a directory using figlet
You can substitute /home/$USER with any path you like.

Synthesize text as speech
The Festival Speech Synthesis System converts text into sound. Or: links -dump http://youfavoritewebsite.com | festival --tts

Monitor a file's size
use "watch" instead of while-loops in these simple cases


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