1.配置网卡，编辑/etc/network/interface（sudo vim /etc/network/interface）文件，添加如下内容
auto ens33 iface ens33 inet static address 192.168.11.93 netmask 255.255.255.0 gateway 192.168.11.1 dns-nameservers 192.168.11.1
添加完成后wq保存退出，重启网卡
sudo /etc/inin.d/networking restart
或者直接追加内容到文件
sudo echo -e "address 192.168.11.93 netmask 255.255.255.0 gateway 192.168.11.1 dns-nameservers 192.168.11.1" > /etc/network/interface
2.配置阿里云镜像源（Ubuntu16.04，请跟根据自己的版本号选择相应的源），编辑/etc/apt/soures.list，添加以下内容或者用追加的方式也可以
deb http://mirrors.aliyun.com/ubuntu/ xenial main deb-src http://mirrors.aliyun.com/ubuntu/ xenial main deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main deb http://mirrors.aliyun.com/ubuntu/ xenial universe deb-src http://mirrors.aliyun.com/ubuntu/ xenial universe deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates universe deb http://mirrors.aliyun.com/ubuntu/ xenial-security main deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security universe
保存退出，更新软件源，需要几分钟的时间
apt-get update
3.Xshell连接Ubuntu连接失败，端口22不通，
关闭防火墙
sudo ufw disable #关闭防火墙 sudo ufw allow 22 #允许外部访问22端口 sudo ufw delete allow 22#禁止外部访问22端口
安装Openssh-server软件
sudo apt-get install openssh-server -y
4.修改root密码
oracle@oracle:~$ sudo passwd [sudo] password for oracle: Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully oracle@oracle:~$