To disable access by users to console programs, run the
following command as root:
rm -f /etc/security/console.apps/*
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In environments where the console is otherwise secured (BIOS and
boot loader passwords are set, [Ctrl]-[Alt]-[Delete] is
disabled, the power and reset switches are disabled, and so forth),
you may not want to allow any user at the console to run poweroff, halt, and
reboot, which are accessible from the
console by default.
To remove these abilities, run the following commands as
root:
rm -f /etc/security/console.apps/poweroff
rm -f /etc/security/console.apps/halt
rm -f /etc/security/console.apps/reboot
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