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grep string from a file

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# 8  
Old 08-31-2010
Quote:
Originally Posted by Scrutinizer
Just for the record, I think you two mean grep -f, not fgrep ..
Isn't fgrep an alias for grep -F (uppercase) ?
# 9  
Old 08-31-2010
Quote:
Originally Posted by frans
Isn't fgrep an alias for grep -F (uppercase) ?
"grep -F(upper case)"; cannot get the result.
# 10  
Old 08-31-2010
I meant fgrep -f as jimmy_y tried out and according to the man page frans is correct.
Last edited by zaxxon; 08-31-2010 at 07:33 AM.. Reason: typo
# 11  
Old 08-31-2010
Ok, I understand what you mean now..
Indeed Frans, grep -F is equivalent to fgrep. In fact it is preferred as fgrep is deprecated, so it would become:
Code:
grep -Ff 1.txt 2.txt

# 12  
Old 08-31-2010
Quote:
Originally Posted by zaxxon
I meant frgep -f as jimmy_y tried out and according to the man page frans is correct.
hi zaxxon,
thanks for hint using "fgrep -f 1.txt 2.txt" it saves me so much time. just now the original script by using grep took me 10mins, now just 2,3 seconds.
Smilie amazing
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