Unix substr in shell script?

Posted by KnockKnockWhosThere on Stack Overflow See other posts from Stack Overflow or by KnockKnockWhosThere
Published on 2010-03-24T20:42:10Z Indexed on 2010/03/24 20:43 UTC
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shell

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script

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substr

I have a string like sample.txt.pgp and I want to return sample.txt in a shell script. Is there a substr function? Like, if I did substr('sample.txt.pgp', -4, 0), is it supposed to return sample.txt? Right now it isn't, so I'm wondering if I have the syntax wrong, or maybe substr isn't a function?

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