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how to compare a two files in unix server.


 
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# 1  
Old 10-15-2009
how to compare a two files in unix server.

Hi Friends,

I have a requirement like i have two files in diffrent locations. i want to compare these two files, if both the files are same i want to return "0" else return 1.

Please help me on this.

Thanks
sreenu.
# 2  
Old 10-15-2009
I'd recommend searching for a good book on basic UNIX commands. It's been so long since I had a UNIX class that I'm sure newer and better ones exist than when I was in school.

Try 'man diff' or Google for something like 'unix compare files'.

For something generic and simple like this, Google's probably a better choice than a forum like this. You'll get a lot more information much faster.
# 3  
Old 10-15-2009
Quote:
Originally Posted by sreenu80
i want to compare these two files, if both the files are same i want to return "0" else return 1.

Please help me on this.

Thanks
sreenu.
You could use the diff tool on that.
Please look at the diff man page.

Another solution may be to create checksums on the 2 files
with the md5sum binary, and afterwards compare the 2 checksums in your script.
# 4  
Old 10-15-2009
Code:
diff <file1> <file2> &>/dev/null && echo 0 || echo 1

Code:
[ "$(md5sum <file1> 2>/dev/null | cut -d' ' -f1)" ==  "$(md5sum <file2> 2>/dev/null | cut -d' ' -f1)" ] && echo 0 || echo 1


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