Creating a PPK key from an id_rsa key using windows subsystem for linux (WSL2)

1. Given a working key:

   ~/.ssh/id_rsa

2. Given the public key installled on https://github.com/settings/keys

   ~/.ssh/id_rsa.pub

3. Install putty tools

   sudo apt install putty-tools

4. Create the ppk

   puttygen id_rsa -o id_rsa.ppk

5. Given a simlink

   keys -> /mnt/c/Users/<USER>/<blah>/<blah>/

6. Copy the ppk to the keys directory

   cp ~/.ssh/id_rsa.ppk ~/keys/id_rsa.ppk

7. Set winscp to use the new ppk key