kolmogorov.math.uoc.gr (147.52.66.13)
gauss.math.uoc.gr (147.52.67.51)
These machines do not respond to telnet or ftp
for security reasons. In order to login interactively to one of these machines
one needs to use some variant of the ssh (Secure SHell)
program. In order to move files from one of these machines to another
the program ftp may not be used any more. One needs to use
a file transfer program based on the SSH protocol.
If you're accessing our machines from Unix
If your username is, for example, john then
just type
ssh john@kolmogorov.math.uoc.gr
in order to get connected to kolmogorov.
Your password will be requested and you login as usual.
If you are sitting at a Unix machine and want to transfer a file
securely to another you should use
scp or sftp
(the latter does not always exist on Unix machines).
The usage of sftp is exactly as that of ftp.
To transfer a file called xyz from your account on
kolmogorov to the machine you're sitting at type
scp john@kolmogorov.math.uoc.gr:xyz xyz
To transfer
the file xyz from your local machine to kolmogorov
you should type
scp xyz john@kolmgorov.math.uoc.gr:xyz
In both cases your password will be asked.
If you're accessing our machines from MS Windows
There are several implementations of the SSH protocol which can be downloaded free from the Internet.
I suggest putty (which is small for quick download and good)
which you can download by clicking
here.
Place the executable file on the desktop and open it.
You should then define a connection before using it. To define a connection
to, say, gauss type gauss.math.uoc.gr
and click on SSH. Type then a name (any name, such as, A connection to gauss)
in "Saved Sessions" box and hit Save.
The name you typed will appear from then on in the large box of the window and the
connection can be opened by doubleclicking it.
You can change the font used (some times it is too small) by first loading your connection (simple click on the connection name, then click on "Load") and then clicking on Appearance in the left column. Choose the font you want (make sure the Script box says Greek, so that you can see greek text) then click on Sessions to the left then Save to commit the changes.
For tranfering files I suggest WinSCP which can be dowloaded here Its use is straightfoward after you have it installed. The file you download is an executable file which when first executed (double click on it) will run the installation program.
How to change your password
Log in securely to any of our publicly accessible computers
and type yppasswd. Make sure your password is not easily found
in a dictionary. It should contain both uppercase and lowercase text
as well as digits. Change it frequently.
Some times it may take several minutes for the new password to take effect. If your new password fails use the old one.