Commands using exit (19)

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Hits per hour apache log

list files recursively by size

Count number of files in subdirectories
For each directory from the current one, list the counts of files in each of these directories. Change the -maxdepth to drill down further through directories.

Network Discover in a one liner

Use bash history with process substitution
Bash has a great history system of its commands accessed by the ! built-in history expansion operator (documented elsewhere on this site or on the web). You can combine the ! operator inside the process redirection

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Remove a line in a text file. Useful to fix "ssh host key change" warnings

Display IPs accessing your Apache webserver.

Export unpushed files list

Reload all sysctl variables without reboot
Reload all defined kernel variables from /etc/sysctl.conf(if no parameter after -p is given) without the old myth "Ah, you'll need to reboot to apply those variables"...


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