debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process:debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process:

 

先遇到/var/cache/apt/archives/libc6_2.27-3ubuntu1.4_amd64.deb相关问题，则用sudo dpkg -i /var/cache/apt/archives/libc6_2.27-3ubuntu1.4_amd64.deb 命令安装它，但安装是报标题中问题用下面方法解决后再重新安装

解决办法 

https://ubuntuqa.com/article/1091.html