Archive for June 2013

Letting NIS master notify a firewalled NIS slave server of updates

We have a NIS master on our corporate network. One of it’s slaves has it’s Shorewall configured iptables firewall enabled. Whenever we would update the NIS maps on the master and run “make -C /var/yp” to push the changes out, we’d get RPC errors about that firewalled slave server. They looked like this (names changed […]

Finding the du – df difference.

Long time system admins will have run into this from time to time: a file system appears to be full when you look at it with df but not when you use du to check it out. Today, this problem appeared dramatically. Our monitoring system reported that the root file system one of our servers, […]