From the directory /srv/import you run `nohup ./load.sh &` and redirect nothing. The script writes progress messages to standard output. Where do those messages go?
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands hard
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The options
Correct They are appended to /srv/import/nohup.out.
Correct. When standard output is a terminal, nohup redirects it to a file called nohup.out in the current directory, appending rather than truncating.
Not correct They are discarded, because nohup connects standard output to /dev/null.
Wrong. nohup discards nothing; that is what an explicit `> /dev/null` would do.
Not correct They are appended to $HOME/nohup.out.
Wrong as the first choice. The home directory is only the fallback used when nohup.out cannot be created in the current directory.
Not correct They stay on the terminal and are lost when the session ends.
Wrong. nohup deliberately moves the output off the terminal, precisely because the terminal is expected to go away.
Why
nohup makes the command immune to SIGHUP and, if standard output is still a terminal, appends it to nohup.out in the working directory; if that file cannot be created there, it falls back to $HOME/nohup.out. Standard error is redirected to wherever standard output goes. Explicit redirection wins over both, so `nohup ./load.sh > /var/log/load.log 2>&1 &` puts the output where you want it and no nohup.out appears.
Where this comes from
- Cited
- manual page nohup(1)
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 103 and space the ones you get wrong.
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