1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd April 15, 2020 29.Dt NOLOGIN 8 30.Os 31.Sh NAME 32.Nm nologin 33.Nd politely refuse a login 34.Sh SYNOPSIS 35.Nm 36.Sh DESCRIPTION 37The 38.Nm 39is intended as a replacement shell field for accounts that 40have been disabled. 41.Pp 42When executed, 43.Nm 44first writes about the login attempt to 45.Xr syslog 3 46and then displays a message that an account is not available. 47.Pp 48To disable all logins, 49investigate 50.Xr nologin 5 . 51.Sh EXIT STATUS 52The 53.Nm 54utility always exits non-zero. 55.Sh EXAMPLES 56Here is a demonstration of executing 57.Nm : 58.Bd -literal -offset 4n 59$ nologin 60This account is currently not available. 61$ tail -n 1 /var/log/messages 62Mar 30 21:53:07 example.org nologin[65992]: Attempted login by beastie on /dev/pts/18 63.Ed 64.Sh SEE ALSO 65.Xr login 1 , 66.Xr nologin 5 67.Sh HISTORY 68The 69.Nm 70utility appeared in 71.Bx 4.4 . 72