In order to run a linux process in background just add the symbol "&" at the end of the command utility.
For example type the command in linux shell prompt:
sort -n linux.txt
This sorts the file in numerical order in background.
In order to suspend a process in background,press the keys [ctrl-[Z].This suspends an application in background.
To allow it to continue running without displaying standard output, type bg and press [Enter]. In linux this is referred to as running the application in the background.
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