Windows user

Using Putty

https://www.ssh.com/ssh/putty/windows/puttygen

https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.html#CreatingSSHkeys-CreatinganSSHkeyonWindows

Mac user

Using Terminal

https://docs.typo3.org/m/typo3/guide-contributionworkflow/master/en-us/Appendix/OSX/SSHKeyOSX.html

https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.html#CreatingSSHkeys-CreatinganSSHkeyonLinux&macOS

After you gen, you can show your key by

$ cat ~/.ssh/id_rsa.pub

Linux user

Using Terminal

https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.html#CreatingSSHkeys-CreatinganSSHkeyonLinux&macOS

After you gen, you can show your key by

$ cat ~/.ssh/id_rsa.pub