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Whether we can search multiple strings using or in grep -F

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# 1  
Old 04-22-2013
Whether we can search multiple strings using or in grep -F
Hi,

Whether we can search multiple strings using or in grep -F

In Generally,

Code:
 grep -F "string1" "filename.txt"

How to search for multiple string using grep -F as we using grep

Code:
 grep "string1\|string2" "filename.txt"


Regards,
Nanthagopal A
# 2  
Old 04-22-2013
AND or OR logic?
Does it have to include both strings or either string?
# 3  
Old 04-22-2013
Quote:
Originally Posted by joeyg
AND or OR logic?
Does it have to include both strings or either string?
I need to search for both the string.
Last edited by nanthagopal; 04-22-2013 at 10:58 AM..
# 4  
Old 04-22-2013
Code:
man grep
man fgrep

I think a newline separator works with all fgrep
Code:
grep -F "\
string1
string2"
"filename.txt"

This is string1 OR string2
# 5  
Old 04-22-2013
Quote:
I need to search for both the string.
It would help greatly to give example test input, and expected output.
# 6  
Old 04-22-2013
If you want lines containing both string1 and string2, try:
Code:
grep -F 'string1' filename.txt|grep -F 'string2'

If you want lines containing string1, string2, or both; try:
Code:
grep -F 'string1
string2' filename.txt

# 7  
Old 04-22-2013
Quote:
If you want ..., try
Quote:
If you want ..., try
That's why I asked for test input. The problem statement is too vague. Smilie
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