ssh
 

can every body explain for me what is ssh exactly?

The short explanation is logging into a root acount. And connecting to the other pc's over the network .

the best way is to used the application yourself..

or search Mr. Google "Telnet and SSH" so you will be able to appreciate SSH more and why it's better than telnet

here's a link:
http://www.differencebetween.net/tec...elnet-and-ssh/

ssh has absolutely nothing to do with logging into the root account.

It is used to provide a "secure tunnel" between a local computer (e.g. your laptop) and a remote host (e.g. your server).

I just learned how to use it last week.

It's very cool!

You could, but it is not good security practice. In fact, it's wise to disable root logins from the /etc/ssh/sshd_config file.

It's best to login as a regular user and then su or sudo to do system administrative tasks.