If you are going to be working on RH-centric systems eg. RH/Centos/FC, I recommend RedHat's PDF and online manuals found here: https://www.redhat.com/docs/manuals/enterprise/ These manuals mostly describe the use of command line utils, and they are broken down into categories such as administration, security etc. _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos