docker容器中vi指令找不到

##在docker容器中vi指令找不到

apt-get update
报错处理
GPG error: http://repo.mysql.com jessie InRelease: The following signatures were invalid: KEYEXPIRED 1487236823 KEYEXPIRED 1487236823 KEYEXPIRED 1487236823

apt-key del 5072E1F5

apt-key adv --keyserver pgp.mit.edu --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5

apt-get update

同步 /etc/apt/sources.list 和 /etc/apt/sources.list.d 中列出的源的索引，这样才能获取到最新的软件包。
等更新完毕以后再敲命令：apt-get install vi命令即可