Cluster Connections
How to connect to the cluster with a PC?
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If I am using command line ssh and scp, how do I transfer files back and forth?
A special transfer host, xfer.cluster.tufts.edu, should be used to transfer files to and from a remote computer.
For example...
| To copy a file up to the cluster into your home dir(user John Doe): > scp your_file.xyz |
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| cluster.tufts.edu:/cluster/home/j/d/jdoe02/ To copy a file down to your PC or laptop into your current dir: |
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cluster.tufts.edu:/cluster/home/j/d/jdoe02/your_file.txt . Note the period on the end indicates in the current directory |
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Most users are more likely to use a gui-based file transfer program such as Winscp. It is freely available.
What about ftp and ncftp?
The cluster does not run a ftp server, so you can't ftp to the cluster. You can Instead you should use sftp and scp clients on your desktop.
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How to connect to the cluster with a Mac?
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ssh |
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-YC jdoe02@login.cluster.tufts.edu |
Provide your Tufts username and password (same as your email).
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Open a local shell window or xterm and connect with:
> ssh -Y login001YC jdoe02@login.cluster.tufts.edu
Provide your username and password (same as your email).
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Yes, use an ssh based login solution such as ssh, SecureCrt, etc...
Do I need SecureCRT to connect to the cluster?
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Can I get SecureCRT from Tufts?
Yes, but use Cygwin instead. SecureCRT Information can be found on the TTS website .
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How does one connect to the cluster with an iPad?
In general you will need an ssh based application. There are dozens of ssh clients. Try iSSH. By many accounts it is considered one of the leading contenders.
When connected to the cluster with ssh I sometimes get disconnected after a period of idle use. How do I remain connected?
On a linux machine, your home directory will contain a .ssh subdirectory. Create a text file called config with the following contents:
| host * ServerAliveInterval 120 |
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If you are using some other ssh based client, look for a setup option where you can choose or include this info.
X Window support info
What is X11 forwarding?
ssh provides a protocol for sending X11 graphics between computers. This option needs to be turned on within your ssh program, such as SecureCRT or ssh command option, etc. If you use SecureCRT you need to enable X11 forwarding. Look for this option in your SecureCRT preference or global settings.
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For ssh and X11 needs there is a linux virtual(program) running on lab PCs. Just login to one of the Blake systems and click on the linux icon on the desktop. It automatically boots into guest mode. Once established a terminal window should start up automatically. From there you can login to the cluster with ssh:
ssh -Y -C UTLN@login001UTLN@login.cluster.tufts.edu
Make sure x11 over ssh works by typing xlogo at the cluster shell prompt.
This should bring up a small window with an X inside of it.
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It is likely that your IP address is blocked by the cluster. It may be that you have the wrong password. Go to Tufts Tools to change it. Otherwise you may have to visit the following site to find out what your remote IP address is so that we can unblock it. There are many reasons why this might be the case. Copy the IP addresses displayed there and send it back to us via the cluster support email venue, clustertts-support@tufts.edu with an explanation.
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