about pid of process
 

Hello dear friends
Is the PID of a process changes during it’s life cycle in linux ?
Or it’s PID is fixed throughout of process’s life cycle.
tanx

What is the context of your question?

Here's a big hint:
Does your house address change with time?
Does your car license number change as you drive down the road?
Do you personal ID #'s ( eg drivers license and Social Security in the USA, or passport) change with time?
What would happen if any of these were "yes"?

PID is fixed during the lifetime of the process. This is necessary for a number of programming and system-related reasons.

Of course, each time an application becomes a process (i.e., the program is started) it will get a different PID.