問題： libua5.2-dev : depends: libreadline-dev but it is not going to be installed 解決方法： 在etc/apt/sources.list中加入deb https;//cz.archive.ubuntu.com/ubuntu bionic-updates-main然後sudo apt update，再安裝 libua5.2-dev : depends: libreadline-dev but it is not going to be installed
