save username password in putty to auto-login

For some versions of Putty it's as simple as:

putty.exe root@example.com -pw mypasswordforexamplecom

For those using Windows, you can simply create a shortcut and pass in those parameters. For example:

1. Create a shortcut on desktop to putty.exe
2. Rename the shortcut to "PuTTY - example.com"
3. Right-click shortcut and choose Properties
4. Modify the target similar to: "C:\Program Files\PuTTY\putty.exe" user@example.com -pw password
5. You can also use IP Address of host in place of domain host name
6. Click OK

Otherwise, you need to use a public key as explained here : "Creating and Copying Your Key-Pair in PuTTY SSH Client".