Login using putty :
1)Download the putty from the following link
2)Run the .exe file
3)Here give the ip_address of the remote linux machine in “Host Name(or IP address)” column.
4)Give the port number ’22′ in “Port” column.
5)Select ssh in “Connection type” and click open.
You can see a back screen with
login as: (Here give the username eg. root and press enter)
email@example.com’s password: (Here give the password of user root and press enter).
Now you are in linux machine…
If You Need to login via ssh keys need to create keys via putty gen and add to authorized_keys file and laod then via Pageant before u login