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cksum command usage

 
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# 1  
Old 04-03-2008
cksum command usage
Hi All,

I am using cksum command in s script to check integrity of set of files transffred across the network.

What are the advantages and disadvantages/limitations of this command?
Is the byte count return reliable?
What are the other alternatives I could use for this purpose?

Appreciate your idea.

Thanks and Regards,
# 2  
Old 04-03-2008
cksum command usage
Hi All,

I am using cksum command in s script to check integrity of set of files transffred across the network.

What are the advantages and disadvantages/limitations of this command?
Is the byte count return reliable?
What are the other alternatives I could use for this purpose?

Appreciate your idea.

Thanks and Regards,
# 3  
Old 04-04-2008
Hello, please don't double post or bump your messages. Since your posts have appeared in 1 minute interval, though, I would assume that the Internet connection has lagged a little bit Smilie
For your question : cksum is a standard POSIX implementation, and byte count is reliable, I don't see any obvious downsides of its use. In the man pages it's written that :
Quote:
The cksum command is typically used to quickly compare a
suspect file against a trusted version of the same, such as
to ensure that files transmitted over noisy media arrive
intact. However, this comparison cannot be considered cryp-
tographically secure. The chances of a damaged file produc-
ing the same CRC as the original are astronomically small;
deliberate deception is difficult, but probably not impossi-
ble.
Another alternative is md5sum or md5 only, depends on what OS you're using. I have, for example, cksum on AIX and SunOS.
 
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