> Nobody thought to run "df"? Disk being full is a common source of all sorts of weird server problems.

Yep, to the point where `df -h` has become one of the first things I run when a server starts acting funny or things stop working.

Disk being full is far too common - run away logging, weird temp files, etc, or sometimes just a box that nobody maintained for years and years.

The fun part starts after you've identified which partition or drive is full - now you have to identify the problem files!

First things you run on login?

It ought to be monitored with alerting by default and inode use too.

True. Unfortunately good monitoring is an afterthought in most organizations.