Process
programs executing in memory are called processes.
each process is identified by a guaranteed unique, non-negative integer called the the processes ID( a.k.a PID)
Create new process - fork(2)
new processes can only created via the fork(2) system call.
Bring process into memory - exec(3)
Programs are brought into memory via exec(3) function.
Process control
process control is performed mainly by the fork(2), exec(3), and wait(2) functions.
PPID : the parent process id.
UID : the user id of the process owner.
CMD : the executable command.
C : the CPU utilization in percentage.
