ssh and sftp:
Start a secure shell connection to another machine:

[ ssh ]

The university I attend uses this protocol. It is much more convienent to log in this way, in my opinion, to check email and work on a website. I use sftp to transfer files. This particular server is running AIX version 4. To log in I type this at the command prompt:
[ ssh myusername@server.myschool.university.edu ]
then after about 1 or 2 seconds this pattern will display ( on your first attempt at login ):

The authenticity of host 'server.myschool.university.edu (123.231.123.231)' can't be established.
DSA key fingerprint is XX:xx:xx:XX:yy:22:xx:23:xx:xx:xx:rr:22:33:22:00.
Are you sure you want to continue connecting (yes/no)?

type the word   yes   and press enter; then you will see this:

Warning: Permanently added 'server.myschool.university.edu ,123.231.123.231' (DSA) to the list of known hosts.

you will be asked for your password. The command [ exit ] logs you out.

After you have completed the above procedure; to connect with sftp type:
[ sftp ]
you will be asked for your password.
the command [ bye ] logs you out.