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Article from MacHacking.net Knowledge Base: http://kb.machacking.net

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Title: SSH Explained
Author: Zelda
Author Contact: zelda@undergroundmac.com
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SSH Explained

SSH (secure shell) is a protocol that is used to communicate with a remote server 
a great pro of SSH is that any information sent over SSHis encrypted using MD5 encryption (128 bit encryption). So if any of your info is intercepted by a remote hacker your information will not be viewable.
Some Common Commands For SSH Include

*	ssh hostname connect to hostname using ssh 
*	slogin hostname you can use ssh and slogin interchangeably 
*	ssh hostname command run command remotely on hostname 
*	ssh -v hostname connect in verbose mode for debugging 
*	ssh -V determine version number for your copy of ssh 
*	ssh-keygen generate a new public/private key pair 
*	ssh-keygen -c myuserid-ssh2@pha generate new key pair with identifying comment 
*	sftp hostname copy files interactively between hosts (requires SSH2). Commands for an sftp session are similar to standard ftp. 
*	scp filename hostB:filename copy file from current computer to hostB 
*	scp1 filename hostB:filename copy file from current computer to hostB (use if hostB only supports SSH1) 
*	scp hostA:filename hostB:filename copy file between two computers 
*	scp -r hostA:dirname1 hostB:dirname2 copy directory (and its contents) between two computers 
*	scp hostA:fn1 hostB:fn2 copy and rename file between two computers 
*	scp fn1 fn2 fn3 hostB:directoryname copy multiple files into hostB's directory 
*	ssh-agent command run command (usually a shell) under control of ssh-agent 
*	ssh-add add local identity to list maintained in memory by ssh-agent 
*	ssh-add filename add identity whose private key is stored in filename to list in memory 
*	ssh-add -l list keys stored in memory 
*	ssh-add -D delete all keys stored in memory 

Notes:
	1) The port SSH uses is 22
	2) your connection (direct) will be viewable on the remote serverŐs traffic.

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Article from MacHacking.net Knowledge Base: http://kb.machacking.net