- 新建的ecs实例设置密码,实例界面点击密码/密钥
- 配置远程连接工具,这里使用xshell,主机设置阿里云实例的公网地址。
配置好主机信息以后,点击用户身份验证,输入ubuntu的用户名和密码。用户名默认root,密码就是在1步骤中重置实例密码设置的新密码。
- 登录ubuntu, 可以输入 lsb-releas -a 查看一下系统版本信息。
- ubuntu20.04更换国内源 ```bash sudo cp /etc/apt/sources.list /etc/apt/sources.list_bak
sudo vim /etc/apt/sources.list
如果source.list的内容已经是类似[http://mirrors.aliyun.com/ubuntu/](http://mirrors.aliyun.com/ubuntu/) <br />或者 [http://mirrors.cloud.aliyuncs.com/ubuntu](http://mirrors.cloud.aliyuncs.com/ubuntu) 那就不需要换了。<br />([http://mirrors.aliyun.com/ubuntu/](http://mirrors.aliyun.com/ubuntu/)替换为[http://mirrors.cloud.aliyuncs.com/ubuntu/](http://mirrors.cloud.aliyuncs.com/ubuntu/),可以节省流量费用。)<br />否则可以删除sources.list的内容。然后添加如下内容:
```bash
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src 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-backports main restricted universe multiverse
保存退出文件。
- 更新源,更新软件
sudo apt-get update
sudo apt-get upgrade