5 AuthenticationMethods publickey
6 HostKey /etc/ssh/ssh_host_ed25519_key
7 HostKeyAlgorithms ssh-ed25519
8 PubkeyAcceptedKeyTypes ssh-ed25519
11 AllowUsers root userA userB
12 PermitRootLogin prohibit-password
14 Subsystem sftp internal-sftp
15 AcceptEnv LANG LC_* COLORFGBG