Query on md5/md5sum

just i need to know. I saw md5 or not sure may be md5sum command in this unix forum something like (not exact)

$ echo hello | md5sum
b1946ac92492d2347c6235b4d2611184  -

when the output of md5/md5sum is given will give the actual string or value, now i am unable to catch the forum, could anyone Please Advise how to get that or achieve the result.

Thanks,
Regards,
karthikram

It should not be possible to calculate the reverse. One could use tables, but not calculate the reverse. Even if a md5 happened to be in a table somewhere, there is not guarantee that it would be the original text, because there is a possibility that two strings can result in the same md5 hash..

Thanks Scrutinizer for the reply.