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Grep Three Words

 
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# 8  
Old 09-02-2005
grep -l CCC $(grep -l BBB $(grep -l AAA files*)) is not working for me. It says "Illegal variable name.". Does it depend on shell also like born, korn, C etc?
Anyway I am using C shell. Comments please!
# 9  
Old 09-05-2005
The $( ) syntax is used by ksh-based shells, including bash.
Csh Programming Considered Harmful
# 10  
Old 09-05-2005
If you only want to return lines that contain all three:
egrep '(AAA.*BBB.*CCC)' filename
# 11  
Old 09-05-2005
Quote:
Originally Posted by 98_1LE
If you only want to return lines that contain all three:
egrep '(AAA.*BBB.*CCC)' filename
echo 'CCCfooAAAbarFredBBBfoo' | egrep '(AAA.*BBB.*CCC)'
# 12  
Old 09-06-2005
Quote:
Originally Posted by Ygor
The $( ) syntax is used by ksh-based shells, including bash.
Csh Programming Considered Harmful

Thanks Ygor. I was under the impression that 'Csh is easy to learn' but unaware it has so many disads.
# 13  
Old 08-14-2008
Quote:
Originally Posted by adurga
wondering whether will not suffice?
grep AAA file* | grep BBB | grep CCC
Almost, but not quite. You need the -l option on the first two.

Code:
grep -l AAA file* | xargs grep -l BBB | xargs grep CCC

A pipeline is somewhat more robust than backticks, IMHO, but this is by and large the same concept as blowtorch's posting.
 
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