On the one hand, I keep seeing comments that Perl is obsolete, and that no one really writes new code in Perl anymore.
On the other hand, almost every Linux or Unix system administration job I've seen advertised in the last several years has, explicitly, listed knowledge of Perl as a requirement. About equally often, I see shell scripting listed; much less often, though still common, I see Python. I can't think of a specific skill requirement I see more often than Perl. So from the looks of it, Perl is still, overwhelmingly, the language of choice for system administration.