开启linux系统ssh的秘钥登录

mkdir /root/.ssh && cd /root/.ssh && touch authorized_keys
cat >> /root/.ssh/authorized_keys <<eof
此处是公钥信息
eof
chmod 600 /root/.ssh/authorized_keys
sed -i "s/PermitRootLogin no/PermitRootLogin yes/g" /etc/ssh/sshd_config
systemctl restart sshd