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Strange error: grep does not read from file

 
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# 1  
Old 09-20-2011
Strange error: grep does not read from file
I have two files
file1.txt
Code:
angie
mary
susan

file2.txt
Code:
angie blond
mary brunnet
susan red
christine black

I want to get this output
Code:
angie blond
mary brunnet
susan red

I write
Code:
grep --file=file1.txt file2.txt

and i get no results

i also wrote
Code:
cat file1.txt|while read line file1.txt;do grep "$line" file2.txt;done

again no results

I tried
Code:
while read line file1.txt;do echo -e "$line";done

nothing

but when i write
Code:
while read line;do echo -e "$line";done<file1.txt

it reads the lines


I don't understand that, why it does not read the input files inside the code?

If i solve this i will be able to run the first command, right?
# 2  
Old 09-20-2011
Should be:
Code:
cat file1.txt|while read line ;do grep "$line" file2.txt;done

But your last example is maybe better still...
# 3  
Old 09-20-2011
Hi, Use grep with option -f

grep -f file1.txt file2.txt.

Hope it should work.
# 4  
Old 09-20-2011
Quote:
Originally Posted by vbe
Should be:
Code:
cat file1.txt|while read line ;do grep "$line" file2.txt;done

But your last example is maybe better still...
I tried but it does not work...

---------- Post updated at 09:38 AM ---------- Previous update was at 09:38 AM ----------

Quote:
Originally Posted by Abhishek_1984
Hi, Use grep with option -f

grep -f file1.txt file2.txt.

Hope it should work.
It does not work either....
# 5  
Old 09-20-2011
Who are you kidding?
Code:
ran:/home/vbe $ cat file1.txt|while read line ;do grep "$line" file2.txt;done
angie blond
mary brunnet
susan red

# 6  
Old 09-20-2011
Quote:
Originally Posted by vbe
Who are you kidding?
Code:
ran:/home/vbe $ cat file1.txt|while read line ;do grep "$line" file2.txt;done
angie blond
mary brunnet
susan red

for me it does not work, with the actual files i have.
That is why i wrote "strange" in the beginning. I've run it before and it worked fine
but i do not know what could be wrong now.
# 7  
Old 09-20-2011
I created exactly the files with the given names and content...
So start to see if the cat command part works or check your perms on those files try to give var name using UPPERCASE which will prevent you to having to look for reseved words or aliases...
 
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