Secure Shell (SSH)

In Chapter 16, we discussed techniques (and considerations) for securing your Linux system. Our discussions emphasized the importance of limiting network-based exposure to your system to the bare essentials. But what if you need to perform system administrative duties remotely? How can you reap the benefits of a truly multiuser system if you can’t easily and securely log into it?

Secure Shell (SSH) was developed to tackle the issue of secure remote logins. SSH is a suite of network communication tools that are collectively based on an open protocol/standard that is guided by the Internet Engineering Task Force (IETF). It allows users to connect to a remote server just as they would using Telnet, rlogin, FTP, ...

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