debian11升级12傻瓜式教程：自从centos歇菜之后debian也新增了一波粉丝，队伍壮大了。当前，debian12出来了，抓紧尝鲜下吧，我们来简单、快速地将debian11升级到debian12吧，大致步骤如下：
先更新现有系统：
apt update && apt upgrade
再修改debian11的源为debian12的：
如果是香港机器或者内地的机器，推荐用华为的源，复制以下代码直接回车即可：
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
如果机器在欧美或者其他地方，推荐用linode的源，复制以下代码直接回车即可：
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
继续更新和升级：
apt update && apt full-upgrade
期间会有几次停顿下来，第一次要输入“q”，其余的全部“y”
最后重启系统：
reboot
