Ubuntu16.04随笔

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\nnetmask 255.255.255.0\ngateway 192.168.11.1\ndns-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:~$