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Editorial Team
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Asked: 2026-06-07T12:31:04+00:00

I have confusion while I’m execute the command # find / -name mysqld. Because

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I have confusion while I’m execute the command “# find / -name mysqld”. Because the mysqld is located in four places which are:

  1. /usr/libexec/mysqld
  2. /etc/rc.d/init.d/mysqld
  3. /var/lock/subsys/mysqld
  4. /var/run/mysqld

What is the purpose of another three mysql daemons?

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1 Answer

  1. Editorial Team

    Here is the following explanations

    • /usr/libexec/mysqld : The actual binary executable
    • /etc/rc.d/init.d/mysqld : The service startup file (text file)
    • /var/run/mysqld : PID/run file folder (mysqld writes a run file in this folder)
    • /var/lock/subsys/mysqld : not sure

    If you run which mysqld you should see the first one

    You never run that directly

    When you run service mysqld start, it calls /etc/rc.d/init.d/mysqld to kickoff a program called mysqld_safe (Run which mysqld_safe). mysqld_safe and mysqld work together to be the server daemon.

    In turn, mysqld_safe will kickoff mysqld and then checks for an exit code. You can run less /etc/rc.d/init.d/mysqld and see this. If mysqld did not end due to system shutdown or a normal service mysql stop, mysqld_safe will attempt to restart mysqld.

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