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How do we make parent-child process become separated parallel?


#1

How do we make parent-child process become separated simultaneous parallel processes by means of Bash script/commands on xterm terminal.

Then user may terminate the parent process with no effect whatsoever to the child… . tried (a, b any binary executable):

$ a & b ;exit
$ a &&bg &b ;exit
$ a &b &&fg ;exit

to no avail
thanks in advance