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How to find lines in a .txt contains the strings I want

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# 1  
Old 11-28-2011
How to find lines in a .txt contains the strings I want
I have a .txt contains a lot of lines.
Now I want to write a shell script to find out all the lines which contain the strings I want, and print these lines.


For example:
A.txt
Code:
when you post any code
you can easily do this
highlighting your code and then click
you should do a Google Site Search or internal search before posting

Now I want to find all lines contains string 'code' and 'when', how to write this script?
Last edited by Scott; 11-28-2011 at 06:29 PM.. Reason: Code tags :)
# 2  
Old 11-28-2011
Code:
grep -E "code|when" file

Talking of which, when posting code, input, output or terminal-screen information, please use code tags. Thanks Smilie
# 3  
Old 11-28-2011
I want lines contain code and when, not code or when...
# 4  
Old 11-28-2011
So you do. Excuse me!

Code:
awk '/code/&&/when/' file

# 5  
Old 11-28-2011
Ok, thank you very much
But one more question, if there is a txt B
B.txt
code
when

Now I just know these two txts, I have to find the lines in A.txt which contains the strings in B.txt. How can I do that?
# 6  
Old 11-28-2011
grep -f B.txt A.txt?
# 7  
Old 11-28-2011
Yes, thank you
This will print the line I want.
But if B.txt is like this:

B.txt
code
when
google

I want to search in A.txt that which words are contain in A and in B, then print them.
How to do that?
I am very appreciate for your help!
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