If you are remotely connecting to your linux desktop using putty and you want to avoid typing your password then pageant is your answer however pageant has a memory of a gold fish. It cannot remember your private key once you have exited from the application. So to get pageant to remember, here is a little trick.
Lets say your private keys are located at “C:\putty\cert”, create a batch file autoloader.cmd and add the following lines
— start here —
if exist "C:\putty\cert\your-linux1.ppk" (set KEYS="C:\putty\cert\your-linux1.ppk")
if exist "C:\putty\cert\your-linux2.ppk" (set KEYS=%KEYS% "C:\putty\cert\your-linux2.ppk")
if not defined KEYS exit
start /d"c:\putty" pageant.exe %KEYS%
— end here —