SSH, FTP and Friends 

About Me • Lorna Jane Mitchell • Web development consultant (mostly PHP) • Trainer, speaker • Author of PHP Master • http://lornajane.net 

The Plan • SSH • more SSH • Some Things That Are Not FTP 

SSH 

What is SSH? • SSH is Secure SHell • used for console access to servers • alternative to telnet 

How To SSH ssh [email protected] Hostname might be an IP address, depends if you have DNS 

SSH Clients For any *nix systems (including mac) use a terminal. For windows, use PuTTY http://lrnja.net/QDUNqx 

VPN 

VPN VPN Virtual Private Network • connects your machine to an additional network • gives access to local-only IPs • may need a token as well as credentials • be aware that ALL your traffic may get sent • once connected, no special powers are needed 

SSH Keys 

Public and Private Keys Common to use keys rather than username/password with SSH • You generate the keys • There will be a public key named something.pub • And a private key called just something • Share the public key anywhere you need access • Guard the private key with your life 

Sending and Storing Keys "Shall I send over my public key?" • Public keys are no use without private keys • Attach public keys to email • Or paste into textareas in forms • Private keys are as vital as passwords • Back them up! • Keep a copy somewhere safe 

Generating Keys ssh-keygen For windows, use PuTTYGen (http://lrnja.net/QDUNqx again) Challenge: Generate your own public/private key pair 

SSH Keys and GitHub Go to edit your profile, and choose "SSH Keys" from the left 

More SSH 

What if you want to have more than one key? 

SSH Identity Files We can specify which private key to use: ssh -i ~/.ssh./github_rsa [email protected] 

SSH Config SSH has a config file. We can use this to set per-host settings. 

Not FTP 

Why Not FTP? FTP has been superceeded by more secure options. Try SFTP or SCP • both usually available when you have SSH • both handled by FileZilla, Transmit and other popular clients 

SFTP SFTP Secure File Transfer Protocol • Secure and more robust file transfer than FTP • Uses your SSH credentials • URLs look like: sftp:// ... 

SCP SCP Secure CoPy Command-line program - works much like cp • Source and Target can be either local or remote • They are of the format username@server:path/to/file scp myfile [email protected]:myfile scp myfile [email protected]: 

Best Practice 

Some Tips! • Use version control, and deploy everything on each release • (as an emergency fallback, back everything up first) • Deploy as much as possible, as often as possible • Use version control ... more on git later! 

Questions?