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: src/usr.bin/nohup/nohup.1,v 1.6.2.4 2001/08/16 13:16:59 ru Exp $ 37.\" $DragonFly: src/usr.bin/nohup/nohup.1,v 1.2 2003/06/17 04:29:30 dillon Exp $ 38.\" 39.Dd July 19, 2001 40.Dt NOHUP 1 41.Os 42.Sh NAME 43.Nm nohup 44.Nd invoke a command immune to hangups 45.Sh SYNOPSIS 46.Nm 47.Op Fl Fl 48.Ar command 49.Op Ar arguments 50.Sh DESCRIPTION 51The 52.Nm 53utility invokes 54.Ar command 55with its 56.Ar arguments 57and at this time sets the signal 58.Dv SIGHUP 59to be ignored. 60If the standard output is a terminal, the standard output is 61appended to the file 62.Pa nohup.out 63in the current directory. 64If standard error is a terminal, it is directed to the same place 65as the standard output. 66.Pp 67Some shells may provide a builtin 68.Nm 69command which is similar or identical to this utility. 70Consult the 71.Xr builtin 1 72manual page. 73.Sh ENVIRONMENT 74The following variable is utilized by 75.Nm : 76.Bl -tag -width flag 77.It Ev HOME 78If the output file 79.Pa nohup.out 80cannot be created in the current directory, the 81.Nm 82utility uses the directory named by 83.Ev HOME 84to create the file. 85.El 86.Sh DIAGNOSTICS 87The 88.Nm 89utility exits with one of the following values: 90.Bl -tag -width Ds 91.It 126 92The 93.Ar command 94was found, but could not be invoked. 95.It 127 96The 97.Ar command 98could not be found or an error occurred in 99.Nm . 100.El 101.Pp 102Otherwise, the exit status of 103.Nm 104will be that of 105.Ar command . 106.Sh SEE ALSO 107.Xr builtin 1 , 108.Xr csh 1 , 109.Xr signal 3 110.Sh STANDARDS 111The 112.Nm 113utility is expected to be 114.St -p1003.2 115compatible. 116.Sh BUGS 117Two or more instances of 118.Nm 119can append to the same file, which makes for a confusing output. 120