I have a couple of servers that I need to remotely monitor. Is there anyway that I can do that? Should I use vncviewer, ssh, or what?


Most of the time you will use ssh. vncviewer might be available, but often it isn't (most servers will not have X11 or anything graphics-related).

Why use SSH? From the CentOS documentation:

  • After an initial connection, the client can verify that it is connecting to the same server it had connected to previously.

  • The client transmits its authentication information to the server using strong, 128-bit encryption.

  • All data sent and received during a session is transferred using 128-bit encryption, making intercepted transmissions extremely difficult to decrypt and read.

  • The client can forward X11 applications from the server. This technique, called X11 forwarding, provides a secure means to use graphical applications over a network.

  • What is so special about ssh? – enginefree Dec 9 '12 at 2:29
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    It's encrypted, can be used for tunneling and for file transfer (scp), among other features. – Renan Dec 9 '12 at 2:33
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    And of course you will turn off password authentication (in favour of key authentication) if you directly connect to Internet. – jippie Dec 9 '12 at 8:23

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