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I used

ps -fT pid

to manage a bunch of process forked from the specified pid.

Now I want to modify some settings so I want to stop the processes whose pid is in ps -fT pid. After the modification I want them to continue running from the stopped state(not redo the process). For example if a process have 4 stages. If I stopped it when it was in second stage, I want to continue it from the second stage. How to do that?

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To suspend a process:

kill -STOP pid

To continue a suspended process:

kill -CONT pid
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