Ps is a Unix command that prints a list of all processes that are currently running or are in the Zombie status on the screen. The term 'ps' is an abbreviation for process status.
The command is available at least since the Unix version V3. Call parameters are frequently used are "ax " or " ef" (depending on the Unix derivative ). These bring a list of all processes, including the respective command line.
The output of this command has the following meaning:
Under Microsoft Windows, there is a similar tool called tasklist.exe.