Here is a example how to convert .pem to .ppk using Ubuntu.
First you need to install package putty-tools
After install, all you really need to do is this:
But.. with -P switch you can set passphrase for extra security, this is recommended and easy to do:
It is also recommended to set comment for your key using -C switch, because this string will be prompted to you when you are entering your passphrase.
Note that you can also change passphrase afterwards by using -P switch
And you are done!
First you need to install package putty-tools
sudo apt-get install putty-tools
After install, all you really need to do is this:
puttygen key.pem -o key.ppk
But.. with -P switch you can set passphrase for extra security, this is recommended and easy to do:
puttygen key.pem -o key.ppk -P -C "My server key"
It is also recommended to set comment for your key using -C switch, because this string will be prompted to you when you are entering your passphrase.
Note that you can also change passphrase afterwards by using -P switch
m@box:~/Downloads$ puttygen -P key.ppk
Enter passphrase to load key:
Enter passphrase to save key:
Re-enter passphrase to verify:
And you are done!