Unix Operating System Patches
Sun Microsystems - SunOS 4 (Solaris 1), SunOS 5 (Solaris 2)
ftp://sunsolve.sun.com/pub/patches
Santa Cruz Operation - SCO UNIX (SLS's, EFS's)
ftp://ftp.sco.com/pub/
Hewlett Packard - HP-UX 9, HP-UX 10
ftp://i3107ffs.external.hp.com/hp-ux_patches
Linux (Red Hat) patches
ftp://ftp.redhat.com/pub/redhat/updates/
comp.sys.linux.answers
Unix Operating Newsgroups and Mailing Lists
Sun Managers
sun-managers-request@sunmanagers.ececs.uc.edu