On Sunday 06 July 2008 16:06:49 David Allen wrote: > I need to make several wholesale changes to a few different systems, > and I'd prefer to do it over SSH without losing connectivity where > possible. I know I can use ifconfig, or edit /etc/rc.conf directly > and reboot, but is there a canonical way to make the changes in > /etc/rc.conf and "reload" those changes to ensure everything is in a > known state? From what I can determine, running netif stop/start > would work, but would require I do that locally.
So, you want to make changes to a machine and confirm they're correct, but when they're not, the old settings should be restored: 0) make sure sshd listens on all ip's ('INADDR_ANY'), not preconfigured set. # cp -p /etc/rc.conf /etc/rc.conf.BEFORE_CHANGE # ${EDITOR} /etc/rc.conf # cp -p /etc/rc.conf /etc/rc.conf.CHANGES Then this script, say /root/bin/testrc.sh: ===================================================================== #!/bin/sh /etc/rc.d/netif stop sleep 1 /etc/rc.d/netif start # sleep for 5 minutes, should be ample time to re-establish the ssh # connection. sleep 300 # We were not killed, this means the connection is faulty cp -p /etc/rc.conf.BEFORE_CHANGE /etc/rc.conf /etc/rc.d/netif stop sleep 1 /etc/rc.d/netif start ===================================================================== Then run as: daemon -p /var/run/testrc.pid /root/bin/testrc.sh When you can log back in, simply: kill `cat /var/run/testrc.pid` ; rm /var/run/testrc.pid And rm /etc/rc.conf.BEFORE_CHANGE if you feel comfy. If you couldn't log back in, inspect /etc/rc.conf.CHANGES and adjust, rm the pid file, rince and repeat. -- Mel Problem with today's modular software: they start with the modules and never get to the software part. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"