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+====== su ======
+===== Default Keybindings =====
+None.
+===== Syntax =====
+  * ''**su** [//username// [//password// [//password2//]]]''
+===== Description =====
+Substitute the user of a display.  The command prompts for all parameters
+that are omitted.  If passwords are specified as parameters, they have to
+be specified un-crypted.  The first password is matched against the
+system's passwd database and the second password is matched against the
+screen password as set with the commands ''[[acladd]]'' or
+''[[password]]''.  ''su'' may be useful for the ''screen'' administrator
+to test multiuser setups.  When the identification fails, the user has
+access to the commands available for user **nobody**.  These are
+''[[detach]]'', ''[[license]]'', ''[[version]]'', ''[[help]]'' and
+''[[displays]]''.
+===== Examples =====
+None yet.
+===== See Also =====
+  * [[:Multiuser]]

GNU screen

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