specialization….

A System Administrator should be able to:

install a server, patch a kernel, create a RAID group, backup (and restore) a system, plan and build a network, configure a firewall, fix email, use at least three operating systems, debug a SCSI chain, write a script, install a database, replace a switch, mentor a colleague, explain what they do to their manager, find out what a customer really needs not what they want, fix “teh Internet”, investigate a security incident, and never, ever panic.

Specialization is for insects.  (with apologies to Robert A. Heinlein)