1. Install putty
$ yum install putty
2. Convert the ppk file to pem file
$ puttygen wha.ppk -O private-openssh -o wha.pem
3. If you want to convert pem file to ppk file
$ puttygen wha.pem -o wha.ppk -O private
Connect using pem file to the remote server
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ssh -i wha.pem user@192.168.1.235 -p 2222
