Screen

Gaba installed screen (a virtual terminal window for linux) in the server.
She uses screen (as the same way many people do ...) to maintain a
console in the server. It is useful to do installation or work on a
specific problem where it would be hard if you lost your connection from
your machine. It can be used to maintain the connection to the irc. She
uses it from one of the protest.net servers to be connected all the time
to the irc.indymedia.org (using irssi).

the command is

screen -S whatevername

it creates a screen with the name whatever name

screen -x name

connects to the screen with name "name"

To read more about it: screen