What is the command to check "md5sum" in ubuntu?

Dear forum members,
I have been searching step by step instruction how to check md5sum for a downloaded ISO file. I found instructions on internet. But I am lost somewhere.I can't do it on Ubuntu. I can check using windows XP but if I know the way of doing in Ubuntu, I want to give farewell xp operating system forever. I haved downloaded this ISO in my computer and saved on my desktop.
LinuxMint-8-Fluxbox.iso

My system:
-Acer aspire one (160 GB)
-Ubuntu karmic 9.10 (now I am using alpha3- ubuntu 10.04 upgraded)

I have done the following things using quide from internet but I am lost somewhere.
Steps:
1. Open terminal
2. I put this command on the terminal:
md5sum LinuxMint-8-Fluxbox.iso
(result-file can't find; it doen't check md5sum)
Angain, I tried putting sudo as :
Steps:
1. Open terminal
2. I put this command on the terminal:
sudo md5sum LinuxMint-8-Fluxbox.iso

(result-file can't find; it doen't check md5sum)
I will glad if someone explains the correct steps and commands to check md5sum on Ubuntu / Linux. I am helphess.
Thanks in advance!
Mr.D

 

You are using the correct command, but I suspect you are not in the same directory as the iso file, hence the command fails to find anything with that filename. Either cd to the directory containing the file and try again, or enter md5sum /home/<your username>/Desktop/LinuxMint-8-Fluxbox.iso (or whatever the full path is)

 

Thank you kmc,
I follow your intruction exaclty and it works.Great! I have been stuck on this problem for a long time. I am really glad. Thanks once again.
Regards,
Mr.D