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Basically I want to dynamically start some processes which may create their own children processes, also I want to kill a certain group of processes I just created whenever I want.

One way I could think of is to start processes with a name (to distinguish as a group), then use pkill to kill them by the name.

The question is how to start a process with a name so that I can use pkill to kill them by the name? I am open to other solutions as well.

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Are you asking how to start a process with a name different from what it usually uses? Or are you just asking how to start a process from the command-line? – Eliah Kagan Jun 21 '12 at 2:09
The process name is shown the same as its file name by default in Linux. I dont want to use its default file name as its process name nor change the file name every time I run. So I want to start the processes with a specific name that I want so that I can use 'pkill -f MyOwnName' to kill all the processes that I just started named MyOwnName at once . – cache Jun 21 '12 at 2:13

You can use the exec shell builtin:

bash -c "exec -a MyUniqueProcessName <command> &"

<command> replaces the current shell, no new process is created, that's why I'm starting a new shell to call exec.

Then you can kill the process with:

pkill -f MyUniqueProcessName

You can start more than one process under the same name, then pkill -f <name> will kill all of them.

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