pro openssh
These days, it's absolutely unheard of to find a System Administrator who doesn't use SSH. Not only is it a great tool to remotely connect to other servers, it can provide secure file transmission and create encrypted tunnels -- and it can do all this almost effortlessly.
Pro OpenSSH by Michael Stahnke is a complete guide to OpenSSH. It covers everything from why you would want to use it to how to use it. Every aspect of the SSH suite is covered: SSH, SCP, SFTP, and tunneling. Each piece is thoroughly explained and explained.
If you're absolutely new to SSH, don't let the Pro in the title scare you, the first half will cover everything you need to know. However, for you seasoned SSH-ers, the second half covers some nice advanced topics and tricks. I especially liked the scripting sections where bash was used in conjunction the SSH tools to automate different tasks.
The SSH tools are already pretty simple to learn. A couple quick tutorials will get you up and on your way. However, if you're the kind of person who likes to have some type of hardcopy around for reference, this will do just fine. Everything is covered very nicely. I give it a 9/10.
