sed delete lines from file one if regexp are listed in file two
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sed delete lines from file one if regexp are listed in file two
Thanks for both answers, they provide useful hints. Actually the situation is more complicated. Sorry if my previous message was a bit misleading. Image that file one.txt contains several hundreds lines of text with several words in each line while file two.txt contains a list of a couple of hundred words. What I would like is to delete every line in one.txt that contains at least one word listed in file two.txt.
Also look at the options for grep. You can use a file for the source of the patterns. You can also use an option that returns lines not matching the patterns. These combined would have the effect of deleting lines in one file that don't contain words in a list.
Also look at the options for grep. You can use a file for the source of the patterns. You can also use an option that returns lines not matching the patterns. These combined would have the effect of deleting lines in one file that don't contain words in a list.
Thanks again to both! It works, provide it that I remove empty lines first.
> sed '/^$/d' one.txt
> sed '/^$/d' two.txt
> cat one.txt | grep -v -f two.txt > output.txt
> cat one.txt
a
b
c
d
e
f
g
> cat two.txt
c
d
e
> cat output.txt
a
b
f
g
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