All processes running on a Linux system are descended from the init (or systemd) process.

A process (e.g. firefox) that is run from a Linux shell becomes a direct child process of the init process.

A process (e.g. firefox) that is run from a shell becomes the parent process of that shell.

It is possible to kill all the processes running on a system when logged in your normal student QMUL account by using the killall command.

Issuing the command “ps” will return a list of all processes running on a system.

Using the top command allows us to see in real time what is going on with processes on our system.