Difference between revisions of "SSH"
From HCL
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== Making a cascade of SSH connections easy == | == Making a cascade of SSH connections easy == | ||
| − | Here is a very convenient way to set up the access to any machine directly instead of doing a cascade of SSH calls. | + | Here is a very convenient way to set up the access to any machine directly instead of doing a cascade of SSH calls. If you can not directly access e.g. the machine "heterogeneous", but you can log into "csserver" and then to "heterogeneous", you can put this into your .ssh/config file : |
Host csserver | Host csserver | ||
User kdichev | User kdichev | ||
Revision as of 11:01, 7 May 2010
Passwordless SSH
To set up passwordless SSH, there are three main things to do:
- generate a pair of public/private keys on your local computer
- copy the public key from the source computer to the target computer's authorized_keys file
- check the permissions.
You can repeat that transitively for "A->B->C". You can use the initial pair of keys everywhere.
See here for details:
http://www.stearns.org/doc/ssh-techniques.current.html
Making a cascade of SSH connections easy
Here is a very convenient way to set up the access to any machine directly instead of doing a cascade of SSH calls. If you can not directly access e.g. the machine "heterogeneous", but you can log into "csserver" and then to "heterogeneous", you can put this into your .ssh/config file :
Host csserver User kdichev Hostname csserver.ucd.ie Host heterogeneous User kiril Hostname heterogeneous.ucd.ie ProxyCommand ssh -qax csserver nc %h %p
Since the installation of a new PBS system, you can not directly log into a hclXX node. You can do
ssh heterogeneous
instead and use "qsub"
X11 forwarding
ssh -X hostname
