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+====== lockscreen ======
+===== Default Keybindings =====
+  * ''C-a x''
+  * ''C-a C-x''
+===== Syntax =====
+  * ''**lockscreen**''
+===== Description =====
+Lock this display.  Call a screenlock program (''/local/bin/lck'' or
+''/usr/bin/lock'' or a builtin if no other is available).  ''screen'' does
+not accept any command keys until this program terminates.  Meanwhile,
+processes in the windows may continue, as the windows are in the
+"detached" state.  The screenlock program may be changed through the
+[[man:Environment|environment variable]] $LOCKPRG (which must be set in
+the shell from which screen is started) and is executed with the user's
+uid and gid.
+Warning:  When you leave other shells unlocked and you have no password
+set on ''screen'', the lock is effectively void: one could easily
+re-attach from an unlocked shell.  This feature should rather be called
+"lockterminal".
+===== Examples =====
+None yet.
+===== See Also =====
+  * ''[[commands:password]]''
+  * [[:Window Management]]

GNU screen