SSH (Secure SHell) is normally used to allow secure encrypted command line connections to a Linux server. It can also be used to create encrypted network tunnels to transport unencrypted data, such as email sessions, FTP, etc.. It provides the best security when accessing another computer remotely...
Here are the most simple steps on connecting to your Linux server using an SSH Client, PuTTY:
PuTTY is a client program for the SSH, Telnet and Rlogin network protocols. These protocols are all used to run a remote session on a computer, over a network...
In other words, you run PuTTY on a Windows machine, to connect to a *nix machine which is accessible over the network.
You can get the complete usages about any commands using the man command, you can type "man command", and you will be given a manual page on how the command is used and what it does...
** Download the PuTTY client from HERE
the EXE by double clicking on it.
** Enter your server's IP in the hostname/IP section
[as shown in the below figure]..
** Change the SSH port from the default  only
if the SSH daemon on the server is set to run on a different one & press the Open
** Enter root
as user name
& press ENTER.
** Now enter root password
[it won't be shown as a security measure] & press ENTER.
Mastering SSH will definitely increase your Linux server's productivity & flexibility & enrich your experience in managing, maneuvering the servers far better..