私はサーバー設定の初心者で、Digitalocean の Ubuntu 18.04.3 (LTS) x64 サーバーに nginx をインストールできないようです。他のエントリを読んでみましたが、どの解決策もうまくいきません。アンインストールして再インストールしてみましたが、常に同じ応答が返されます。
sudo apt-get install nginx
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:
nginx : Depends: nginx-core (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
nginx-full (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
nginx-light (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
nginx-extras (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed
Depends: nginx-core (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
nginx-full (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
nginx-light (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
nginx-extras (>= 1.14.0-0ubuntu1.7) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
ご協力いただければ幸いです。