sshconfig-lint

Deprecated or obsolete option

warningChecked in the browserDEPRECATED_OPTION

The configuration uses an old alias or an option that OpenSSH now ignores.

Why it matters

Ignored settings create false confidence, while old aliases make the file harder to understand and maintain.

Replace an old alias with the current option shown by the linter. Remove options such as Protocol that no longer change current OpenSSH behavior.

What is wrong

Host legacy  KeepAlive yes  PubkeyAcceptedKeyTypes ssh-ed25519

Corrected configuration

Host legacy  TCPKeepAlive yes  PubkeyAcceptedAlgorithms ssh-ed25519