来源：image.png

    https://superuser.com/questions/1417691/libssl-dev-dependency-issue-on-ubuntu-18-04
    关键词:po 损包，

    情节：安装libssl-dev时报错；可能依赖坏了

    1. sudo apt install --reinstall libssl1.1=1.1.1f-1ubuntu2.9
    2. Reading package lists... Done
    3. Building dependency tree
    4. Reading state information... Done
    5. Reinstallation of libssl1.1 is not possible, it cannot be downloaded.
    6. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

    修复：
    重新安装低版本依赖包
    sudo apt install —reinstall libssl1.1=1.1.1f-1ubuntu2.8
    sudo apt install libssl-dev

    问题解决。