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ssh-keygen - getting the PEM format with recent OpenSSH versions

With OpenSSH_8.9p1 (installed on Ubuntu 22.04 LTS), ssh-keygen -t rsa -b 4096 -m PEM stills provide the new format; to get the PEM format the passphrase should be empty and can be obtained by ssh-keygen -t rsa -b 4096 -m PEM -P ""



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