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Old 10-25-2007, 05:17 AM   #1
thodo
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Registered: Apr 2006
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problem with grep command


Hi guys,

I have the following problem when using the grep command:

I want to select some entries from a file (source_file.cat),
using as a reference a one-column file (ref_file.cat)
with entries (I call them "ID") common in both files, such as

75963
71903
-20486

the grep command will work fine for the first two entries, but it will complain
for the third one as grep does not like the "-" sign. It will only work if I convert
the - sign to '\-' in my do loop. Is there a smart way of doing that?

Thanks in advance,

Thodo
 
Old 10-25-2007, 05:20 AM   #2
acid_kewpie
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Registered: Jun 2001
Location: UK
Distribution: Gentoo, RHEL, Fedora, Centos
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check the grep manpage...
Code:
       -e PATTERN, --regexp=PATTERN
              Use PATTERN as the pattern; useful to protect patterns beginning
              with -.
 
  


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