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how to grep special character regular expression?

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Operating Systems Linux how to grep special character regular expression?
# 8  
Old 09-26-2009
Maybe this will work:

Code:
cat file1 | while read LINE
do
grep -e $LINE file2 >> file3
done

# 9  
Old 09-27-2009
mark54g:
Could it be that grep is limited to certain line numbers. When I had close to 1/2 million columns I did not have a problem. BUT, now that I have that many rows, grep does not seem to work.


treedroppings:
Yes I have tried the man pages since I know very little about unix.
# 10  
Old 09-27-2009
why don't you use the below code,

for line in `cat file1`
do
grep -w "$line" file2 >>file3
done
# 11  
Old 09-27-2009
Could you feed it to cat and then use xargs to append the file?
# 12  
Old 09-28-2009
mark54g and apsprabhu;

You were very helpful. THANK YOU!. This code works:

Code:
file="file1.txt"
while read line
do
grep $line file2 >> file3
done < $file
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