12). It??™s often convenient to place an SSH command in a .desktop file so that
a menu option or icon will invoke a remote client automatically.
The user would probably not be aware that the application was running remotely??”
except that she will be prompted for a password each time she clicks on the icon.
It??™s possible to configure SSH to use public key cryptography for authentication
instead of passwords. This eliminates the password prompt altogether and makes
remote client execution beautifully seamless.
Public key cryptography and the intricacies of SSH are fascinating subjects,
and I cannot do them justice in a few short articles. For detailed
information on SSH, consult SSH, The Secure Shell: The Definitive
Guide by Daniel J. Barrett et al. (O??™Reilly).
There are several versions of SSH in use, but the most widely used is the open source
OpenSSH package. It is included with BSD systems (where it originated) as well as
most Linux distributions and some commercial Unix systems.
To set up public key authentication using OpenSSH (once again, I??™m using blue to
mean the host on which the X server is running, and red to mean the host on which
the X client will be run):
1.
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