Following is a simple example session in which I begin at my desktop machine as user simonh, ssh into bohrg1 and from there into storage, the head/submit node for the Bohrg cluster.
First, login to bohrg1 --- note that a passphrase for a key is prompted for:
simonh@mctalby:~$ ssh mpciish2@bohrg1.man.ac.uk
Enter passphrase for key '/home/simonh/.ssh/id_dsa':
*****************************************************************************
This is the Bohrg gateway, bohrg1.man.ac.uk (aka bohrg.man.ac.uk).
Any questions or problems to Mark Vincent in the first instance.
*****************************************************************************
Last login: Fri Apr 15 13:27:41 2005 from mctalby.mc.man.ac.uk
mpciish2@bohrg1:~$ ls -al
total 20
drwxr-xr-x 3 mpciish2 users 4096 Apr 6 13:56 .
drwxr-xr-x 3 root root 4096 Feb 27 17:43 ..
-rw------- 1 mpciish2 users 52 Apr 6 13:55 .Xauthority
-rw------- 1 mpciish2 users 313 Apr 15 13:32 .bash_history
drwx------ 2 mpciish2 users 4096 Apr 6 13:55 .ssh
If you are not prompted for a passphrase for a key, something is
not working correctly and you will not be able to login. Notice the directory
called .ssh and the permissions on that directory (it is private).
Next, login to storage:
mpciish2@bohrg1:~$ ssh storage mpciish2@storage's password: Rocks 3.1.0 (Matterhorn) Profile built 17:25 09-Oct-2004 Kickstarted 17:25 09-Oct-2004 -bash-2.05b$ ls -F src/ trash/ compat-libstdc++-7.3-2.96.118.i386.rpm pgi_master_license RaidMan-7.00.i386.rpm -bash-2.05b$ ls -FNotice that this is not the same home directory as that on bohrg1.
From here, storage, I can use SGE to submit and monitor jobs:
-bash-2.05b$ qstat
job-ID prior name user state submit/start at queue master ja-task-ID
---------------------------------------------------------------------------------------------
1075 0 a4aEZRRCa mbdtsmv r 04/05/2005 10:05:18 compute-0- MASTER
0 a4aEZRRCa mbdtsmv r 04/05/2005 10:05:18 compute-0- SLAVE
1211 0 r_h2o_3
.
.
.
Following is a simple example session in which I begin at my desktop machine as user simonh, ssh into bohrg3 and from there into dominion1, the head/submit node for the Dominion cluster.
First, login to bohrg3 --- note that a passphrase for a key is prompted for:
simonh@mctalby:~$ ssh mpciish2@bohrg3.man.ac.uk Enter passphrase for key '/home/simonh/.ssh/id_dsa': Last login: Wed Apr 6 13:40:07 2005 from mctalby.mc.man.ac.uk -bash-2.05b$ ls -bash: ls: command not found -bash-2.05b$ telnet -bash: telnet: command not found -bash-2.05b$ pwd /home/mpciish2Notice that the environment is severely restricted --- neither ls nor telnet are available. (pwd is built in to the shell.)
Next, login to dominion1:
-bash-2.05b$ ssh dominion1 Password: Linux dominion1 2.4.27 #2 SMP Mon Mar 7 17:42:23 GMT 2005 i686 GNU/Linux The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. Last login: Tue Mar 22 09:44:37 2005 from 10.2.62.250 mpciish2@dominion1:~$ ls -F src/ trash/ compat-libstdc++-7.3-2.96.118.i386.rpm pgi_master_license RaidMan-7.00.i386.rpm mpciish2@dominion1:~$Notice that the files visible are the same as those on storage (above) as the home-directories are shared between the two clusters.
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