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Find the 10 users that take up the most disk space

print crontab entries for all the users that actually have a crontab
This is how I list the crontab for all the users on a given system that actually have a crontab. You could wrap it with a function block and place it in your .profile or .bashrc for quick access. There's prolly a simpler way to do this. Discuss.

uniq without pre-sorting
Reads stdin, and outputs each line only once - without sorting ahead of time. This does use more memory than your system's sort utility.

list files recursively by size

View and review the system process tree.
The "pstree" command uses special line-drawing characters. However, when piped into the "less" pager, these are normally disabled.

This will allow you to browse web sites using "-dump" with elinks while you still are logged in
README: This require you to login on facebook with elinks without using '-dump' first time and when you have logged in you will then be able to dump all data from facebook without any advanced combos, dump is all you need for see all your friends newsfeed or whatever you wish to view in cli/terminal. Facebook is just an example, same requirements for all websites that have a login form.

list files by testing the ownership
Alternative to mnikhil's ls/awk solution

It decripts all pgp files in a selection folder and move the output into a file.

Add prefix onto filenames
Best to try first with -n flag, to preview

Running a command at a specific time


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