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Redirect to the same file [message #161866] Tue, 07 March 2006 10:05 Go to next message
Daxesh
Messages: 61
Registered: July 2004
Member
Hello Friends,

I have really simple question on Unix.

I have one big file (test1.txt). Now I want to keep last 10 lines from this file with the same file name.

I was thinking to do like this

tail -10 test1.txt > test1.txt

But in this case my file size become '0'

Is there a way to do this?

Thanks again Mad
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Re: Redirect to the same file [message #162121 is a reply to message #161866 ] Wed, 08 March 2006 19:11 Go to previous message
rleishman
Messages: 3118
Registered: October 2005
Location: Melbourne, Australia
Senior Member
Not the way you want. Best way is:

tail -10 test1.txt > .tmp.test1.txt && mv .tmp.test1.txt test1.txt


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Ross Leishman
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