nologin

politely refuse a login

TLDR

Set a user's login shell to nologin to prevent the user from logging in

$ chsh -s [user] nologin
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Customize message for users with the login shell of nologin

$ echo "[declined_login_message]" > /etc/nologin.txt
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SYNOPSIS

nologin [-V] [-h]

DESCRIPTION

nologin displays a message that an account is not available and exits non-zero. It is intended as a replacement shell field to deny login access to an account.

If the file /etc/nologin.txt exists, nologin displays its contents to the user instead of the default message.

The exit status returned by nologin is always 1.

OPTIONS

-c, --command command

--init-file

-i --interactive

--init-file file

-i, --interactive

-l, --login

--noprofile

--norc

--posix

--rcfile file

-r, --restricted

These shell command-line options are ignored to avoid nologin error.

-h, --help

Display help text and exit.

-V, --version

Display version information and exit.

NOTES

nologin is a per-account way to disable login (usually used for system accounts like http or ftp). nologin uses /etc/nologin.txt as an optional source for a non-default message, the login access is always refused independently of the file.

pam_nologin(8) PAM module usually prevents all non-root users from logging into the system. pam_nologin(8) functionality is controlled by /var/run/nologin or the /etc/nologin file.

HISTORY

The nologin command appeared in 4.4BSD.

AUTHORS

REPORTING BUGS

For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.

AVAILABILITY

The nologin command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.

SEE ALSO

login(1), passwd(5), pam_nologin(8)

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