You won't be able to directly use your
PuTTY's key in
OpenSSH because the keys are of different format.
You'll need to first convert
PuTTY's key to
OpenSSH's key format to be able to use the key.
You can convert
PuTTY Private Key (
ppk) file to
OpenSSH private key using
PuTTY Key Generator (
puttygen.exe) from the official website and launch the program.
PuTTYGen's main interface.
PuTTY's private key file which normally ends with
.ppkextension and click on the
Conversions → Export OpenSSH keyfrom the menu.
There's an old and new types of
SSH key file format and will be automatically be determined based on the key's type except if you choose
Export OpenSSH key (force new file format).
OpenSSHprivate key and click on the save button.
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