hello everyone, can You explain please, can grep pick rows if at least one element from the list appeared, for exmaple
grep "hello world" file1
grep must give me all rows which have or word hello or world or both of them, thanks in advance
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43answers:
3
A:
how about
grep -r "hello\|world" file1
that's a recursive grep by the way. it searches recursively for the term "hello world" in file1. it can also apply to a directory like so:
grep -r "hello\|world" dir/dir2/
corroded
2010-06-02 07:38:56
no, doesn't work:<
lego69
2010-06-02 07:44:58
I need also cases when appears only hello or only world
lego69
2010-06-02 07:48:12
you can use the above grep by Anton but just add the -r for recursive. something like grep -r "hello\|world" file1
corroded
2010-06-02 08:00:36
sorry, but I have something like "$numbers" not exactly "hello world", so it will not work, any other ideas?
lego69
2010-06-02 07:47:07
yes, exactly and now I want to choose all rows which contain these numbers
lego69
2010-06-02 07:54:49
@Anton; you need a semi-colon before the grep (in your comment, not your answer). Without the semi-colon, or_nums is being set in grep's environment, but the shell is not expanding $or_nums in the argument list to grep.
William Pursell
2010-06-02 08:20:28
@William Pursell: Well actually I had a newline - but I couldn't figure out how to preserve it in the comment and format the block as code :(
Anton
2010-06-02 08:24:50
A:
put your patterns in some file patterns.txt, one pattern per line, and run
grep -Ff patterns.txt file1
zed_0xff
2010-06-02 08:08:23