The process identifier (process ID or PID) is a number used by Linux or Unix operating system kernels. It is used to uniquely identify an active process.

What is Process name?

The process name is used to register application defaults and is used in error messages. It does not uniquely identify the process. Warning. User defaults and other aspects of the environment might depend on the process name, so be very careful if you change it.

What is the process in Linux?

Processes carry out tasks within the operating system. A program is a set of machine code instructions and data stored in an executable image on disk and is, as such, a passive entity; a process can be thought of as a computer program in action. … Linux is a multiprocessing operating system.