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Old 09-20-2004, 09:57 PM   #1
Registered: Oct 2003
Posts: 37

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How to run script that doesn't terminate when shell closes?

The title says it all. The problem I have is my internet connection disconnects after 4 hours of being online. When I open a shell (ssh) to my server and perform a virus scan or sometimes backups from command line, because our server is a large Dual 2.8Ghz with 3 drives and many users there is a heap of work to do each time these commands execute. It always takes longer than 4 hours - mainly because some of the accounts on the server have enormous file structures. Just listing these directories can take over an hour! So anyway how do I execute a command from shell that will not then die when the shell terminates, but instead keep running until it finishes.

Old 09-20-2004, 10:08 PM   #2
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Registered: Mar 2003
Location: Burke, VA
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Usually running the command with an ampersand:
appended will do it.

ls -al &
for example.

For more intricate work, the application "screen" may be of more use
Screen is mentioned in many posts of this type, and also has a very useful (if complicated) manpage. The server may or may not have that application installed. If you don't have root access, contact someone who does to install it for you, or try installing it within your home/bin.

Old 09-20-2004, 10:20 PM   #3
Registered: Feb 2003
Location: Wichita, KS
Distribution: Heavily modified Redhat
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Also, try the nohup command

nohup long_command &

It will redirect the output to nohup.out.

Without the nohup command, ssh will not terminate your session until the job is finished.


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