--length (-l) BITS key length in bits (2048)
--expire (-e) EXPIRE date to expire
subkey-to-ssh-agent (s) store authentication subkey in ssh-agent
+ version (v) show version number
help (h,?) this help
EOF
subkey_to_ssh_agent "$@"
;;
+ 'version'|'v')
+ echo "$VERSION"
+ ;;
+
'--help'|'help'|'-h'|'h'|'?')
usage
;;