1.同步 /etc/apt/sources.list 和 /etc/apt/sources.list.d 中列出的源的索引，获取到最新的软件包。
root@e96879cea783:/var/www/html/ctc/app/Services/Logic# apt update
Get:1 http://security.debian.org/debian-security buster/updates InRelease [65.4 kB]
Get:2 http://security.debian.org/debian-security buster/updates/main amd64 Packages [305 kB]
2.安装 vi 发现不好用接着来
root@e96879cea783:/var/www/html/ctc/app/Services/Logic# apt install vi
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package vi
3、等更新完，再输入apt-get install vim，就会安装vim命令了。这样就可以使用vim命令了。
root@e96879cea783:/var/www/html/ctc/app/Services/Logic/Account# vi Register.php
bash: vi: command not found
root@e96879cea783:/var/www/html/ctc/app/Services/Logic/Account# apt-get install vim
Reading package lists... Done
Building dependency tree
