更新：
1 | apt-get update && apt-get upgrade |
备份一份：
1 | cp /etc/apt/sources.list /etc/apt/sources.list.orig |
将/etc/apt/sources.list里所有“stretch”替换为“buster”：
1 | sed -i 's/stretch/buster/g' /etc/apt/sources.list |
再更新一下
1 | apt-get update && apt-get upgrade |
执行升级命令
1 | apt-get dist-upgrade |
提示完成后重启
1 | reboot |
查看下当前debian版本
1 | lsb_release -a |