支持Root登录

编辑文件

sudo  /etc/ssh/sshd_config

修改

#PermitRootLogin prohibit-password
PermitRootLogin yes

重启ssh

sudo service ssh restart

换源

centos8

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum clean all && yum makecache

centos7

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all && yum makecache

ubuntu20.4

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

sudo vi /etc/apt/sources.list

focal 是 Ubuntu 20.04 的代号

deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse

sudo apt-get update
# 如果需要将系统中的软件包升级到最新版本，可以运行：
sudo apt-get upgrade

同步时间

CentOS

首先保证机器的网络正常

安装ntp工具

yum -y install ntp

同步时间

/usr/sbin/ntpdate -u cn.pool.ntp.org

写入硬件时间：

hwclock -w

Ubuntu

查看当前时间状态

timedatectl status

设置时区

sudo timedatectl set-timezone Asia/Shanghai

手动设置时间

sudo timedatectl set-time '2024-04-27 14:30:00'

启用网络时间同步（确保自动校准时间）

sudo timedatectl set-ntp true