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neziric
Asked: 2010-12-02 05:15:26 +0800 CST

Can process be reloaded by PID?

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I run a daemon which cannot be restarted via init.d or service command.

Is there a way to restart a process just by passing a process id to some command?

process

2 Answers

  1. Best Answer

    Killing or Reconfiguring a Daemon without Restarting

    kill -HUP 1721

    Restarts the process 1721 by sending the hangup signal.

    killall -HUP inetd

    Causes the daemon to reload its config file by sending the hangup signal.

    killall -1 inetd

    Restarts inetd by sending signal number 1 which is the hangup signal.

    The difference between this example and the previous one is the signal is called by name here rather than number.

    Reference: http://www.comptechdoc.org/os/linux/usersguide/linux_ugprocesses.html

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  2. you can use the following command

    CMD=`cat /proc/1234/cmdline |sed 's/\x0/ /g'` && kill 1234 && `$CMD` &

    where 1234 is the process id.

    What this line does is that first it copies the command line that was used to run that process into a variable, then it kills that process and restarts it using the stored command line.

    Update: above command line has been updated

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