Answer Posted / saroj kumar rout (tcs)
A process is an executing program identified by a unique
PID (process identifier). To see information about your
processes, with their associated PID and status, type
% ps
A process may be in the foreground, in the background, or
be suspended. In general the shell does not return the UNIX
prompt until the current process has finished executing.
Some processes take a long time to run and hold up the
terminal. Backgrounding a long process has the effect that
the UNIX prompt is returned immediately, and other tasks
can be carried out while the original process continues
executing.
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