General :: Difference Between Nohup And Bg Commands?
May 7, 2010
Does the nohup command make a process immune to the HUP signal by sending the process to the background or does it achieve this by some other means? If it it does send it to the background, then are all background processes immune to the HUP signal? If yes, then we can make processes go to the background for getting immunity against HUP by using the bg command as well can't we?
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Mar 20, 2010
I ran a perl script in background with nohup and disown to make sure my script runs even after the parent process is terminated.
Method 1: nohup
> nohup perl run.pl &
[1] 2080
Method 2: disown
> perl run.pl &
[2] 2448
> disown
In either method, the script process doesn't seem to connect to init process, when I checked using pstree command. I thought, the disown or nohup command detaches the process from its parent and attaches it to grand grand parent init process. And it disables SIGHUP signal to my script process. But the pstree command didn't show me what I expected. It still shows my script process attached to my current terminal process. I just don't understand the concept behind these two commands (nohup and disown). Is there any way, I can see the list of processes that are run by nohup or disown command?
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I have a ssh command as shown:
Code:
ssh remoteusr@<ip> "perl ./monitor.pl count_pages" | /monty/graphs/mail.pl
This command connects to remote machine and fetches data which gets continously streamed at screen(shown at terminal). If I do Ctrl+Z and bg to put it into background. Works Fine. But when i close the putty, it gets closed surprisingly.
I tried with nohup <command> & But wonder how to provide password.
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Apr 11, 2011
I run
nohup bash -c "while [ true ]; do echo test; done"
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SW version: nohup (GNU coreutils) 8.5
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Jun 3, 2011
If I start a process with nohup:
nohup WHATEVER &
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Code:
find . -name *.txt
Code:
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Nov 8, 2010
I want to use nohup and script command together but they don't work. Normally I use
Code:
script -c "./run arg1" run-log.txt
Then I want to send that command in background with nohup:
Code:
nohup "script -c "./run arg1" run-log.txt" &
but I get this error:
Code:
nohup: ignoring input and appending output to `nohup.out'
nohup: cannot run command `script -c "./run arg1" run-log.txt': No such file or directory
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