我尝试libpq-dev在 ubuntu 16.04 中安装，但出现了这个问题：
The following packages have unmet dependencies:
libpq-dev : Depends: krb5-multidev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
因此我尝试krb5-multidev使用命令进行安装sudo apt-get install krb5-multidev但收到此错误：
krb5-multidev : Depends: libkrb5-3 (= 1.13.2+dfsg-5) but 1.13.2+dfsg-5ubuntu2 is to be installed
Depends: libk5crypto3 (= 1.13.2+dfsg-5) but 1.13.2+dfsg-5ubuntu2 is to be installed
Depends: libgssapi-krb5-2 (= 1.13.2+dfsg-5) but 1.13.2+dfsg-5ubuntu2 is to be installed
E: Unable to correct problems, you have held broken packages.
它看起来与 ubuntu 包冲突所以有人能帮我解决这个问题吗！！！
答案1
请尝试这些命令，从清理临时文件开始，配置所有未解压但未配置的包，然后修复损坏的包依赖关系，更新并安装 libpq：
sudo apt-get clean
sudo dpkg --configure -a
sudo apt-get -f install
sudo apt-get update
sudo apt-get install libpq-dev