OpenBSD: Reload / Restart / Stop dhcpd Server Command

Posted on in Categories , , , last updated November 19, 2013

I manage MS-Windows server and recently started to play with OpenBSD server. How do I reload or restart the dhcpd server on OpenBSD using shell command line option?

If you made changes to the configuration of your DHCP (dhcpd) server, you will have to stop and restart the server manually. On OpenBSD and Unix like operating system, you kill the dhcpd server and restart manually. Another option is to send HUP (SIGHUP) to dhcpd server.

Method#1: Find dhcpd PID and kill it

Type the following ps command to find dhcpd PID as root user:
# ps ax | grep dhcpd
Sample outputs:

_dhcp    13420  0.0  0.1   588   568 ??  Ss    10:27PM    0:00.04 dhcpd re0

You need to kill that process with kill command.
# kill -9 13420

To start dhcpd, type the following commands:
# touch /var/db/dhcpd.leases
# dhcpd -q re0

Method #2: Say hello to /etc/rc.d/dhcpd script

You can skip all of the above commands. Use rc script as follows to start, stop, restart, and check dhcpd server on OpenBSD:
/etc/rc.d/dhcpd start
/etc/rc.d/dhcpd stop
/etc/rc.d/dhcpd restart
/etc/rc.d/dhcpd check

4 comment

  1. I’m using OpenBSD 6.0 and I know dhcpd is running (clients obtain leases), but I don’t have it on my list of processes:

    [email protected] /root# ps aux | grep dhcpd
    root 49136 0.0 0.0 1996 1488 p0 R+ 12:10PM 0:00.00 grep dhcpd (z

    How do I check it’s PID?

    1. Not really sure why you asked this question the PID is in your comments 49136.
      do a
      /etc/rc.d/dhcpd check
      /etc/rc.d/dhcpd restart
      ps -axc | grep ‘dhcpd’ | sed -E ‘s/([^ ]+){1}.*/\1/’
      That will give you your pid

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