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system beep off

Create an eicar.com test virus
Test whether real-time virus detection is working by running this command and checking for eicar.com in /tmp. Requires real-time scanning to be enabled and active on the /tmp directory. If scanning is active, the file should be quarantined/deleted (depending on your settings) moments after running this command. If not, the (harmless) test file should remain in your /tmp directory.

RTFM function
Sometimes you don't have man pages only '-h' or '--help'.

Have an ssh session open forever
Open a ssh session opened forever, great on laptops losing Internet connectivity when switching WIFI spots.

Generate a random password 30 characters long

Get a regular updated list of zombies
Shows all those processes; useful when building some massively forking script that could lead to zombies when you don't have your waitpid()'s done just right.

Translate your terminal into Swedish Chef
Bork, bork, bork! To keep it short, the first terminal line doesn't show a prompt.

Find the package that installed a command

File rotation without rename command
Rotates log files with "gz"-extension in a directory for 7 days and enumerates the number in file name. i.e.: logfile.1.gz > logfile.2.gz I needed this line due to the limitations on AIX Unix systems which do not ship with the rename command.

Clean apt-get and gpg cache and keys
Cleans apt-get and gpg cache and keys


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