What is difference between a job and a process in Unix?

Question

What is the difference between a job and a process in Unix ? Can you please give an example ?

Answer 1

job is when you want to know about processes started from the current shell.

process is when you want to know about a process running from any shell or computer.

Answer 2

Jobs are processes which are started by a shell. The shell keeps track of these in a job table. The jobs command shows a list of active background processes. They get a jobspec number which is not the pid of the process. Commands like fg use the jobspec id.

In the spirit of Jürgen Hötzel's example:

find $HOME | sort &
[1] 15317
$ jobs
[1]+  Running                 find $HOME | sort &
$ fg
find $HOME | sort
  C-c C-z
[1]+  Stopped                 find $HOME | sort
$ bg 1
[1]+ find $HOME | sort &

Try the examples yourself and look at the man pages.

Answer 3

A job consists of multiple processes running in series or parallel. A process is a program under execution.

Answer 4

Jobs are one or more processes that are grouped together as a 'job', where job is a UNIX shell concept. A job consists of multiple processes running in series or parallel. while A process is a program under execution. job is when you want to know about processes started from the current shell.

Answer 5

http://en.wikipedia.org/wiki/Job_control_%28Unix%29:

Processes under the influence of a job control facility are referred to as jobs.

Answer 6

http://en.wikipedia.org/wiki/Job_control_%28Unix%29

Jobs are one or more processes that are grouped together as a 'job', where job is a UNIX shell concept.