CTRLALTDEL(8)               System Administration              CTRLALTDEL(8)

NAME         top

       ctrlaltdel - set the function of the Ctrl-Alt-Del combination

SYNOPSIS         top

       ctrlaltdel hard|soft

DESCRIPTION         top

       Based on examination of the linux/kernel/reboot.c code, it is clear
       that there are two supported functions that the Ctrl-Alt-Del sequence
       can perform.

       hard   Immediately reboot the computer without calling sync(2) and
              without any other preparation.  This is the default.

       soft   Make the kernel send the SIGINT (interrupt) signal to the init
              process (this is always the process with PID 1).  If this
              option is used, the init(8) program must support this feature.
              Since there are now several init(8) programs in the Linux
              community, please consult the documentation for the version
              that you are currently using.

       When the command is run without any argument, it will display the
       current setting.

       The function of ctrlaltdel is usually set in the /etc/rc.local file.

OPTIONS         top

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

FILES         top


SEE ALSO         top

       init(8), systemd(1)

AUTHOR         top

       Peter Orbaek ⟨⟩

AVAILABILITY         top

       The ctrlaltdel command is part of the util-linux package and is
       available from Linux Kernel Archive 

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found at 
       ⟨⟩.  If you have a
       bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository
       ⟨git://⟩ on
       2018-02-02.  (At that time, the date of the most recent commit that
       was found in the repository was 2018-02-01.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

util-linux                      October 2015                   CTRLALTDEL(8)

Pages that refer to this page: reboot(2)