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. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)nohup.1 8.1 (Berkeley) 6/6/93 32.\" $FreeBSD$ 33.\" 34.Dd November 9, 2018 35.Dt NOHUP 1 36.Os 37.Sh NAME 38.Nm nohup 39.Nd invoke a utility immune to hangups 40.Sh SYNOPSIS 41.Nm 42.Op Fl Fl 43.Ar utility 44.Op Ar arguments 45.Sh DESCRIPTION 46The 47.Nm 48utility invokes 49.Ar utility 50with its 51.Ar arguments 52and at this time sets the signal 53.Dv SIGHUP 54to be ignored. 55If the standard output is a terminal, the standard output is 56appended to the file 57.Pa nohup.out 58in the current directory. 59If standard error is a terminal, it is directed to the same place 60as the standard output. 61.Pp 62Some shells may provide a builtin 63.Nm 64command which is similar or identical to this utility. 65Consult the 66.Xr builtin 1 67manual page. 68.Sh ENVIRONMENT 69The following variables are utilized by 70.Nm : 71.Bl -tag -width flag 72.It Ev HOME 73If the output file 74.Pa nohup.out 75cannot be created in the current directory, the 76.Nm 77utility uses the directory named by 78.Ev HOME 79to create the file. 80.It Ev PATH 81Used to locate the requested 82.Ar utility 83if the name contains no 84.Ql / 85characters. 86.El 87.Sh EXIT STATUS 88The 89.Nm 90utility exits with one of the following values: 91.Bl -tag -width Ds 92.It 126 93The 94.Ar utility 95was found, but could not be invoked. 96.It 127 97The 98.Ar utility 99could not be found or an error occurred in 100.Nm . 101.El 102.Pp 103Otherwise, the exit status of 104.Nm 105will be that of 106.Ar utility . 107.Sh SEE ALSO 108.Xr builtin 1 , 109.Xr csh 1 , 110.Xr signal 3 , 111.Xr daemon 8 112.Sh STANDARDS 113The 114.Nm 115utility is expected to be 116.St -p1003.2 117compatible. 118.Sh BUGS 119Two or more instances of 120.Nm 121can append to the same file, which makes for a confusing output. 122