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[Solved] Replacing line of text while file is closed

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# 1  
Old 01-14-2014
[Solved] Replacing line of text while file is closed
Is it possible to replace a line of text within a file while it's closed with a single command or a script? Please show me an example or point me to a webpage that shows an example. The file has this line of text:

LoginGraceTime 100

I want to replace it with the following:

LoginGraceTime 0

I want a script to complete this action, I can hardcode the filename, the line that should be replaced and the text that I want to replace it with.

Thank you in advance.
# 2  
Old 01-15-2014
Not sure what you mean by file is closed. You can update file using sed from the command line liks this:

Code:
sed -r --in-place 's/LoginGraceTime\s+100/LoginGraceTime 0/' /etc/ssh/sshd_config

# 3  
Old 01-15-2014
By "file is closed", I meant that I didn't want to be viewing the contents of the file in an editor like vi. Your command is exactly what I was looking for, Thank you.
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