自从CentOS停止更新后，Debian也获得了更多的支持者，队伍壮大了。现在Debian 12已经发布了，赶紧来尝试一下吧！以下是一个简单易懂的教程，教你如何将Debian 11升级到Debian 12。下面是大致的步骤：
第一步
执行更新系统命令
apt update && apt upgrade第二步
将debian11的源修改为debian12的
国外机器推荐Linode的，直接复制以下执行即可
cat > /etc/apt/sources.list << EOF
deb http://mirrors.linode.com/debian bookworm main non-free-firmware
deb-src http://mirrors.linode.com/debian bookworm main non-free-firmware
deb http://mirrors.linode.com/debian-security/ bookworm-security main non-free-firmware
deb-src http://mirrors.linode.com/debian-security/ bookworm-security main non-free-firmware
deb http://mirrors.linode.com/debian bookworm-updates main non-free-firmware
deb-src http://mirrors.linode.com/debian bookworm-updates main non-free-firmware
EOF国内或香港机器这里推荐使用华为源
cat > /etc/apt/sources.list << EOF
deb https://mirrors.huaweicloud.com/debian/ bookworm main non-free non-free-firmware contrib
deb-src https://mirrors.huaweicloud.com/debian/ bookworm main non-free non-free-firmware contrib
deb https://mirrors.huaweicloud.com/debian-security/ bookworm-security main
deb-src https://mirrors.huaweicloud.com/debian-security/ bookworm-security main
deb https://mirrors.huaweicloud.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb-src https://mirrors.huaweicloud.com/debian/ bookworm-updates main non-free non-free-firmware contrib
deb https://mirrors.huaweicloud.com/debian/ bookworm-backports main non-free non-free-firmware contrib
deb-src https://mirrors.huaweicloud.com/debian/ bookworm-backports main non-free non-free-firmware contrib
EOF再次更新和升级：
执行期间会有几次停顿，第一次要输入“q”，其余的全部“y”
apt update && apt full-upgrade最后
重启系统
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