|
RESOURCES AND INSTRUMENTATION >
Computational Biology > Computational
Resources > Linux Cluster
Cluster Login Procedure
ssh — which stands for "secure shell" — is a widely
accepted method of securely connecting one computer to another. With protocols
such as telnet, your username/password is sent across the network or the
internet in clear text, meaning people can "sniff" your username/password
if they really want to. With ssh, your password is encrypted and much harder
to obtain. For security reasons, the Bauer Core cluster accepts only connections
that use ssh.
Proper steps to follow to execute a
basic ssh connection:
Obtain and install the ssh client software
Windows
Download
the PuTTY software. Select the proper version for your machine,
and then save the executable to your machine.
Macintosh
If you use a Mac, the Terminal application will allow you to open
an ssh connection. (If you have a very old Mac, pre-OS X, get
the MacSSH client and use
MacSSH.)
UNIX/Linux
If you use a Linux or another Unix-based machine, most likely ssh
is already installed. If this is the case, simply execute the command "ssh
portal.cgr.harvard.edu" at
the command line prompt to connect to the Bauer cluster, then give your
login credentials.
Setup the ssh connection with Windows client - PuTTY
Execute the PuTTY executable and setup the ssh connection
as seen in the following image. Type portal.cgr.harvard.edu in the "Host
Name" box.
Select the SSH protocol, and leave port 22 as the default. Type in "portal" under
Saved Sessions and click "Save".
In the "Category" browser on the left, click on "Data".
Now you can set the username to be used everytime you connect to portal. Terminal-type
string should be set to "xterm". Then click back on "Session" in
the upper left and finish the PuTTY configuration for portal, by clicking
on the "Save" button.
Initiate and exit the ssh connection
You should then be able to double click on the "portal" Saved Session
that you created and it will connect to the portal host and ask for your
password. Enter your password and it should let you in.
The first time you
connect to portal, you may receive a message warning you that the server's
host key is unknown. This is happening because you've never logged in to
portal before; don't worry about it.
When you are finished with your ssh session on portal, simply type "exit" at
the command line prompt and your ssh connection should terminate.
Bauer
Cluster Support: cluster_admin@cgr.harvard.edu
|
