IN THIS CHAPTER
Using SSH for remote login
Using SSH to do tunneling
Using SSH to provide proxy service
Using SSH with private keys
Using screen remote multiplexing terminal
Accessing remote Windows desktops
Sharing remote Linux desktops with VNC
Most professional Linux administrators do not run a graphical interface on their Internet servers. As a result, when you need to access other computers for remote administration, you will almost surely need to work from the command line at some time. Luckily there are many feature-rich Linux commands to help you do so.
Tools associated with the Secure Shell (SSH) service not only allow remote login and file transfer, but they also offer encrypted communication to keep your remote administration work secure. With tools such as Virtual Network Computing (VNC), you can have a server's remote desktop appear on your local client computer. These and other features for doing remote systems administration are described in this chapter.
Linux's big brother Unix grew up on university networks. At a time when the only users of these networks were students and professors, and with networks mostly isolated from each other, there was little need for security.
Applications and protocols that were designed in those times (the 1970s and 1980s) reflect that lack of concern for encryption and authentication. SMTP is a perfect example of that. This is also true of the ...