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Operating Systems Linux Red Hat Nohup with ampersand & process gets disconnected Post 303033345 by Corona688 on Wednesday 3rd of April 2019 05:02:18 PM
Old 04-03-2019
If these programs are opening /dev/tty by themselves, nohup can't stop them from getting the boot. Running from crontab they wouldn't, as opening /dev/tty wouldn't get anything anyway.

I'd be really curious what file descriptors you find open in all PID's owned by you after you do a nohup ./script & disown ; exit, visible in /proc/####/fd. If some database client is grabbing /dev/tty maybe it can be convinced not to do so with a commandline switch.

There's also the "at" daemon if you have it, a kind of cron equivalent for one time tasks which lets you specify something to run at a time in the future.

Last edited by Corona688; 04-03-2019 at 06:08 PM..
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NOHUP(1)						    BSD General Commands Manual 						  NOHUP(1)

NAME
nohup -- invoke a utility immune to hangups SYNOPSIS
nohup [--] utility [arguments] DESCRIPTION
The nohup utility invokes utility with its arguments and at this time sets the signal SIGHUP to be ignored. If the standard output is a ter- minal, the standard output is appended to the file nohup.out in the current directory. If standard error is a terminal, it is directed to the same place as the standard output. Some shells may provide a builtin nohup command which is similar or identical to this utility. Consult the builtin(1) manual page. ENVIRONMENT
The following variables are utilized by nohup: HOME If the output file nohup.out cannot be created in the current directory, the nohup utility uses the directory named by HOME to create the file. PATH Used to locate the requested utility if the name contains no '/' characters. EXIT STATUS
The nohup utility exits with one of the following values: 126 The utility was found, but could not be invoked. 127 The utility could not be found or an error occurred in nohup. Otherwise, the exit status of nohup will be that of utility. SEE ALSO
builtin(1), csh(1), signal(3) STANDARDS
The nohup utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BUGS
Two or more instances of nohup can append to the same file, which makes for a confusing output. BSD
July 19, 2001 BSD
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