If you do it in a text terminal, just type your user
name at the prompt; you will be asked for your password; type it and you
are in the system (if you did not do any mistake).
To log on in a X-windows terminal you will find a small window with a
"Logging" Type your user name, and then your password; you will
then go to an X-windows session.
To log out (exit) of a text teminal, type logout
To exit an X-windows session, use the mouse; click on the right
buttom of it and choose the "Logout" or "exit"
If you want to access the system from outside (or some machine in the system remotely from another machine) you have several options:
ssh remote-computerIf you are outside the School of Maths sytem, then the only computer you can acess by this way is telnet.math.tifr.res.in
You can also execute commands with something like
ssh remote-computer command-to-be-executed
Or execute a command with
rsh remote-computer command-to-be-executedThe difference between ssh and rsh is that the latter does not encrypt the data, so important things like password and other commands can (in principle) be read by an outside machine.
telnet remote-computerand the connection is not encrypted.
Some times the system will complain when you try to log out, with a message of the type There are stopped jobs and will not exit you from your session. In that case, you can try one of the following things:
+ Stopped less /etc/servicesThen you can call the job by doing
fg %1and finish it. Log out after that. Or you could kill the job with
kill -9 %1and then log out.
kill -9 -1The disadvantage of this option is that it will kill any job that you are running. For example, if you left some long computation running it will be finished.
If you have problems to log out of a session that you started with ssh or rsh just type
~.For a session initiated with telnet type
Ctrl-]that is, the "Control" key and the ] at the same time.