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Shell Programming and Scripting

print a line when NOT in a file

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Top Forums Shell Programming and Scripting print a line when NOT in a file
# 8  
Old 11-08-2009
Quote:
Originally Posted by TonyLawrence
And yet another way which, depending upon what you are doing next, may or may not be more convenient:

Code:
for i in `cat list1.txt`; do grep -q $i paragraph.txt || echo $i; done

or
Code:
for i in `cat list1.txt`; do grep -iq $i paragraphs.txt || echo $i; done

that's expensive operation, calling grep for each line in list1.txt. use grep's -f option when possible
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