sudo apt-get install phpmyadmin php-mbstring php-gettext
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
php-mbstring : Depends: php7.0-mbstring but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
答案1
看来您需要按顺序安装它们，这样任何依赖关系都会得到处理，因此应该是这样的：
sudo apt install php7.0-common php7.0-mbstring php-mbstring