[CentOS] df to get total disk usage on all filesystems?

Mon Aug 11 19:10:18 UTC 2008
Sean Carolan <scarolan at gmail.com>

> df -kl | awk '/^\/dev\// { avail += $3/1024 } END { printf("%d Mb used\n",avail)} '

Awesome, this is going into my bag of goodies.  Thanks!