一、Ubuntu18版本 服务器
1）替换源。将原有的源注释掉
vi /etc/apt/sources.list deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
2）安装yum
apt-get install build-essential apt install yum
3)安装防火墙命令
apt install firewalld
4）修改ip地址
vi /etc/netplan/50-cloud-init.yaml
network: ethernets: ens33: addresses: [192.168.x.xx/24] gateway4: 192.168.xx.x dhcp4: no version: 2
切换dns
vi /etc/resolv.conf nameserver 8.8.8.8
5）ifconfig 命令工具
yum install net-tools
6）压缩
yum install -y unzip zip
7）系统时间
yum install ntpdate
8）允许root登录
vi /etc/ssh/sshd_config
PermitRootLogin yes （默认为#PermitRootLogin prohibit-password）
更新服务
service ssh restart
二、Centos切换root
sudo passwd root