1.\" Copyright (c) 1989, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)nohup.1 8.1 (Berkeley) 6/6/93 36.\" $FreeBSD$ 37.\" 38.Dd June 6, 1993 39.Dt NOHUP 1 40.Os 41.Sh NAME 42.Nm nohup 43.Nd invoke a command immune to hangups 44.Sh SYNOPSIS 45.Nm 46.Ar command 47.Op Ar arguments 48.Sh DESCRIPTION 49The 50.Nm 51utility invokes 52.Ar command 53with 54its 55.Ar arguments 56and at this time sets the signal 57.Dv SIGHUP 58to be ignored. 59The signal 60.Dv SIGQUIT 61may also be set 62to be ignored. 63If the standard output is a terminal, the standard output is 64appended to the file 65.Pa nohup.out 66in the current directory. 67If standard error is a terminal, it is directed to the same place 68as the standard output. 69.Pp 70.Nm Nohup 71exits 1 if an error occurs, otherwise the exit status is that of 72.Ar command . 73.Pp 74Some shells may provide a builtin 75.Nm 76command which is similar or identical to this utility. 77Consult the 78.Xr builtin 1 79manual page. 80.Sh ENVIRONMENT 81The following variable is utilized by 82.Nm : 83.Bl -tag -width flag 84.It Ev HOME 85If the output file 86.Pa nohup.out 87cannot be created in the current directory, the 88.Nm 89utility uses the directory named by 90.Ev HOME 91to create the file. 92.El 93.Sh SEE ALSO 94.Xr builtin 1 , 95.Xr csh 1 , 96.Xr signal 3 97.Sh STANDARDS 98The 99.Nm 100utility is expected to be 101.St -p1003.2 102compatible. 103