Ubuntu安装SSH

1、查看已安装服务

    dpkg -l | grep ssh

2、安装未安装服务

    sudo apt install openssh-server
    sudo apt install openssh-client

3、查看ssh-server是否启动

    ps -e | grep ssh

4、配置ssh_config

    sudo nano /etc/ssh/ssh_config


    cancel the # before: 
    # PasswordAuthentication yes

5、配置sshd_config

    sudo nano /etc/ssh/sshd_config


    PermitRootLogin prohibit-password
    change into:
    PermitRootLogin yes

6、重启ssh服务，Done

    sudo /etc/init.d/ssh restart