rockylinux 配置密钥登录

# 禁止 root 用密码远程登录，但允许密钥
PermitRootLogin prohibit-password

# 或更严格：完全禁止 root 远程登录
# PermitRootLogin no

PasswordAuthentication no
PubkeyAuthentication yes

vim ~/.ssh/authorized_keys

sshd -t

systemctl reload sshd