Run following commands with properly defining your email in a comment:
ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519 -C "john@example.com" cat ~/.ssh/id_ed25519.pub |
Here we explain used options:
Then copy output of cat command and use it in desired application like TDS Portal profile, Gitlab profile, etc...
several old ssh exchange algorithms removed since Ubuntu 20.04 , so make sure to always use latest version of Putty. Otherwise you might experience errors while trying to connect.
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Download PuTTY Key Generator (puttygen.exe) from official Putty home page https://www.putty.org/ and start it.