I have never posted a question here. I would really appreciate if any one can answer this. Please let me know if the question is not clear

I have 2 files which are file1 and file2. I need to search for each of the lines from file1 in file2. And if it exists then comment that line in file2. The line thats being searched will be just part of the line in file2.

Ex:
Text in file1:
perlmonks

Text in file2:
I am in perlmonks
I am posting question

output file which is again file2 should look like this:
#I am in perlmonks
I am posting question

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