Sources

1. 编辑配置文件,编辑完成后请记得保存.

路径: /etc/apt/sources.list

# Debian Testing main repo
deb http://deb.debian.org/debian testing main contrib non-free non-free-firmware

# Debian Testing updates
deb http://deb.debian.org/debian testing-updates main contrib non-free non-free-firmware

# Debian Testing security
deb http://security.debian.org/debian-security testing-security main contrib non-free non-free-firmware

2. 更新索引 & 升级系统

apt update && apt full-upgrade