Tutorial

To enable developer options, tap the Build Number option 7 times. You can find this option in Configurations > About the Phone > Software Info > on Compilation Number tap if for 7 times.

sudo mkdir /media/iso
sudo mount -o loop -t iso9660 /home/user/file.iso /media/iso

Counting lines in Python files:

It's safe to run the following command while containers are running, because it removes only unused resources (not used by at least one container):

Get directory size:

This command shows all available Debian packages to install: