一、备份现有apt源配置

mv /etc/apt/sources.list /etc/apt/sources.listback

二、替换为默认官方源

1.Debian12替换为默认官方源

全部复制后，直接粘贴然后一起执行。

cat > /etc/apt/sources.list << EOF
deb https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
deb https://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://deb.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
deb-src https://deb.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware
EOF

然后执行 apt update 更新

2.Debian11替换为默认官方源

全部复制后，直接粘贴然后一起执行。

cat > /etc/apt/sources.list << EOF
deb https://deb.debian.org/debian/ bullseye main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye main contrib non-free

deb https://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye-updates main contrib non-free

deb https://deb.debian.org/debian/ bullseye-backports main contrib non-free
deb-src https://deb.debian.org/debian/ bullseye-backports main contrib non-free

deb https://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb-src https://deb.debian.org/debian-security/ bullseye-security main contrib non-free
EOF

然后执行 apt update 更新

3.Debian10替换为默认官方源

全部复制后，直接粘贴然后一起执行。

cat > /etc/apt/sources.list << EOF
deb http://deb.debian.org/debian/ buster main contrib non-free
deb-src http://deb.debian.org/debian/ buster main contrib non-free

deb http://deb.debian.org/debian/ buster-updates main contrib non-free
deb-src http://deb.debian.org/debian/ buster-updates main contrib non-free

deb http://deb.debian.org/debian/ buster-backports main contrib non-free
deb-src http://deb.debian.org/debian/ buster-backports main contrib non-free

deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free
deb-src http://deb.debian.org/debian-security/ buster/updates main contrib non-free
EOF

然后执行 apt update 更新

三、替换为国内更新源

1.Debian 12 清华大学更新源

全部复制后，直接粘贴然后一起执行。

cat > /etc/apt/sources.list << EOF
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://mirrors.tuna.tsinghua.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware
deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security bookworm-security main contrib non-free non-free-firmware
EOF

然后执行 apt update 更新