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.
-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
-V, --version
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.
The nologin command appeared in 4.4BSD.
login(1), passwd(5), pam_nologin(8)
For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.
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/>.