ubuntu 新系统初始化

cp -r/etc/apt/sources.list/etc/apt/sources.list.bak

sed -i's#http://deb.debian.org#https://mirrors.aliyun.com#g' /etc/apt/sources.list

sudo apt update

sudo apt install openssh-server

sudo systemctl status ssh

/etc/init.d/ssh start

sudo echo " PermitRootLogin yes "  >>  /etc/ssh/sshd_config

sudo ufw allow ssh

sudo systemctl disable --now

sudo systemctl enable --now ssh

cat ~/home/id_rsa.pub >> ~/.ssh/authorized_keys

### 更新软件包索引

sudo apt update

### 安装 ssh 服务

sudo apt install openssh-server

### 查看 ssh 状态

sudo systemctl status ssh

- 如果运行状态不为active(running)，需要手动开启，命令为:

/etc/init.d/ssh start

### 修改 ssh 配置

sudo vim /etc/ssh/sshd_config

# 将PermitRootLogin prohibit-password那一行修改为PermitRootLogin yes

# 去掉前面的#号将port 22前面的#去掉

### 检查防火墙

sudo ufw allow ssh

### 重新注册ssh服务并附带立马启动

sudo systemctl disable --now ssh

sudo systemctl enable --now ssh

### ssh免密登录设置方法

cat ~/home/id_rsa.pub >> ~/.ssh/authorized_keys