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PLEASE NOTE: I am in the process of making my notes public. This docs section is still work in progress. It currently is a summary of random tips for various things.
Found a mistake? Want to add something? Feel free to open an issue, send a pull request or an e-mail.

Source - Contributions are welcome!

Disclaimer: I mostly worked with Debian and Debian derivatives. And yes, Linux is just the Kernel, I know.

General info:
Source code

Linux und ports

What process is using/ blocking port?:
lsof -i:<port no>
How can I kill process that blocks the port?:
kill $(lsof -t -i:<port no>)
kill -9 $(lsof -t -i:<porn no>)

Killing programms

Useful links:

kill man page

kill kill -9 #if necessary

Finding of process:

ps -aux | grep firefox

pkill firefox # works too

ctrl + alt + F2 to open a new session if your system crashed.


Show permissions recursive:
ls -Rla .

Umount target is busy

Finding the process:
lsof | grep '<mountpoint of /dev/sda1>'A
Some solution that I have not tested yet:
mount -o remount,ro /dev/device
lsof +f -- /dev/<devicename> | awk 'NR==1 || $4~/[0-9]+[uw -]/'
fuser -m /dev/<my-device>

E-Mail hellofoo@ittafoovern.comcom