NOLOGIN(8) MidnightBSD System Manager’s Manual NOLOGIN(8)
nologin — politely refuse a login
The nologin utility displays a message that an account is not available and exits non-zero. It is intended as a replacement shell field for accounts that have been disabled.
To disable all logins, investigate nologin(5).
The nologin utility appeared in 4.4BSD.
MidnightBSD 0.3 June 19, 1993 MidnightBSD 0.3