>Any of you folks have a recommendation on a replacement?

This is a new book written specifically for Linux by the same authors of the purple UNIX System Administration Handbook. It was just released back in March   I've sent my order in for mine.

Linux Administration Handbook
by Evi Nemeth, Garth Snyder, Trent R. Hein
1st edition (March 25, 2002) 
http://www.amazon.com/exec/obidos/ASIN/0130084662/ref=ase_acoupleofguru-20/102-9460510-2872112

-Keith