每当我在Ubuntu中使用以“ apt-get”开头的任何命令时，都会收到此错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
openvpn-as : Depends: iptables but it is not installed
Depends: openvpn-as-bundled-clients but it is not installable
E: Unmet dependencies. Try using -f.