Hou to use Checksums?

[suomalainen]

Ubunteros,

I found on:

http://www.wilderssecurity.com/showthread.php?t=323210

A non pae Ubuntu 12.04 iso

There are apparently Checksums associated with it... eg:

md5sum:
e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso
sha256sum:
047ca71b469a23dce844ba1571a6eae4c64e7e24527449f94d 0fb6402676ced1 ubuntu-12.04-desktop-i386-nonpae.iso

But I don't know how to use them.

Would someone mind teaching me?

Thanks,

Suomalainen

[VMC]

From a terminal type md5sum <file>.iso. Example:

md5sum gnome-saucy-desktop-amd64.iso

edit:

 md5sum --help or  man md5sum

[suomalainen]

Thanks for the terminal commands which yielded

:~/Desktop$ md5sum ubuntu-12.04-desktop-i386-nonpae.iso
e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso

To me it looks like two additional lines from the checksum are missing? Or am I missing something?

Thanks

[Bashing-om]

md5sum:
e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso <-source documentation
e857a7ccde6d6a85b2080d285ee48023 ubuntu-12.04-desktop-i386-nonpae.iso <- command output

Thus the .iso file "ubuntu-12.04-desktop-i386-nonpae.iso" is validated in that it is unchanged on your download as to what is original at the
source.

sha256sum:
From the manual:

compute and check SHA256 message digest
DESCRIPTION
Print or check SHA256 (256-bit) checksums. With no FILE, or when FILE is -,
read standard input

See:
https://help.ubuntu.com/community/HowToSHA256SUM

different from md5sum check .

many paths to an end

[suomalainen]

Thanks everyone for the help and clarification on this. Much appreciated!