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+CU sudo 1.3.1 is known to work on the following platforms:
+
+AIX 3.x
+4.3 BSD (including MORE/BSD)
+BSDI (BSD/386)
+ConvexOS 9.1
+HP BSD 2.0
+HP-UX 8.x and 9.x
+Irix 4.x
+KSR OS
+Linux (with and w/o shadow passwords)
+NextStep 2.x and 3.x
+DEC OSF/1 1.2 and 1.3
+Solaris 2.x
+Sunos 4.x
+Ultrix 4.x