Из справочной страницы "ssh-keygen (1)":
For RSA1 keys, there is also a comment field in the key file that is only for
convenience to the user to help identify the key. The comment can tell what the
key is for, or whatever is useful. The comment is initialized to “user@host”
when the key is created, but can be changed using the -c option.
…
-C comment
Provides a new comment.
-c Requests changing the comment in the private and public key files. This
operation is only supported for RSA1 keys. The program will prompt for
the file containing the private keys, for the passphrase if the key has
one, and for the new comment.
Итак, при создании ключа вы используете -C "$desiredcommenttext"
, чтобы предоставить любой текст комментария, который вам нравится; или для существующего ключа используйте параметр -c
, чтобы изменить комментарий.