nohup - Start a process that is immune to hangups
Format
nohup command-line
tcsh shell: nohup command
Description
nohup invokes a utility program using the given command-line. The utility runs normally; however, it ignores the SIGHUP signal.
If the standard output is a terminal, nohup appends the utility's output to a file named nohup.out in the working directory. This file is created if it does not already exist; if it cannot be created in the working directory, it is created in your home directory.
If the standard error stream is a terminal, nohup redirects the utility's error output to the same file as the standard output.
nohup sh -c 'command*'
where
command can contain such constructs.In the tcsh shell, with command, nohup runs command such that it will ignore hang up signals. Commands can set their own response to hang ups, overriding nohup. Without an argument (allowed only in a shell script), nohup causes the tcsh shell to ignore hang ups for the remainder of the script. See tcsh: Invoke a C shell.
Localization
- LANG
- LC_ALL
- LC_CTYPE
- LC_MESSAGES
- NLSPATH
See Localization for more information.
Exit values
126
- nohup found the utility program but could not invoke it.
127
- An error occurred before nohup invoked the utility, or nohup could not find the utility program.
Otherwise, the exit status is the exit status of the utility program that is invoked.
Portability
POSIX.2, X/Open Portability Guide, UNIX Systems
Related information
exec, hup, nice, sh, tcsh