-rewind (1) - rewind tape drive
-rk (4) - RK-11/RK07
-rm, rmdir (1) - remove (unlink) files
-rv (4) - Racal/Vadic ACU interface
+rexec (3X) - return stream to a remote command
+rexecd (8C) - remote execution server
+rlogin (1C) - remote login
+rlogind (8C) - remote login server
+rm, rmdir (1) - remove (unlink) files or directories
+rmail (1) - handle remote mail received via uucp
+rmdir (2) - remove a directory file
+rmdir, rm (1) - remove (unlink) directories or files
+rmt (8C) - remote magtape protocol module
+rogue (6) - Exploring The Dungeons of Doom
+route (8C) - manually manipulate the routing tables
+routed (8C) - network routing daemon
+rrestor (8C) - restore a file system dump across the network
+rsh (1C) - remote shell
+rshd (8C) - remote shell server
+ruptime (1C) - show host status of local machines
+rwho (1C) - who's logged in on local machines
+rwhod (8C) - system status server
+rx (4V) - DEC RX02 floppy disk interface