ssh -V OpenSSH_8.9p1 Ubuntu-3, OpenSSL 3.0.2 15 Mar 2022 ssh-keygen -f my ssh-keygen -ef my > my-ef.pub ssh-keygen -lf my-ef.pub ## So, maybe my-ef is a private-key ssh-keygen -yf my-ef.pub Load key "my-ef.pub": error in libcrypto man ssh-keygen -e This option will read a private or public OpenSSH key file and print to stdout a public key in one of the formats pecified by the -m option. The default export format is “RFC4716”. This op‐tion allows exporting OpenSSH keys for use by other programs, in‐cluding several commercial SSH implementations.