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Shell Programming and Scripting

Background Job

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# 1  
Old 04-10-2011
Background Job
Hello Everyody,
Having a doubt.
sort file1 &
when we sent a job to the background it returns
Job Number
PID
again if we want to put it into foreground we have to use
job number

WHY NOT PID ?
that is also unique for the process .
# 2  
Old 04-10-2011
The job is not only for one command, it can be shell scripting, which include thousands of commands, after you run it, it will generate different PIDs.

So which PID you need forground then?

To man jobs maybe give you full idea on the background and foreground jobs.
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