我正在尝试下载软件包（特别是针对 proxychains 的软件包），并且不断收到对话框告诉我 dpkg 已中断，但是每次我输入“sudo dpkg --configure -a”时都会导致出现以下错误：
lily-hammer@lilyhammer-H97N:~$ systemctl status nginx.service
● nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: en
Active: active (running) since Fri 2017-12-01 11:16:31 CST; 6h ago
Docs: man:nginx(8)
Main PID: 1198 (nginx)
Tasks: 5 (limit: 4915)
CGroup: /system.slice/nginx.service
├─1198 nginx: master process /usr/sbin/nginx -g daemon on; master_pro
├─1199 nginx: worker process
├─1200 nginx: worker process
├─1201 nginx: worker process
└─1202 nginx: worker process
Dec 01 11:16:31 lilyhammer-H97N systemd[1]: Starting A high performance web serv
Dec 01 11:16:31 lilyhammer-H97N systemd[1]: Started A high performance web serve
lily-hammer@lilyhammer-H97N:~$ systemctl nginx restart
Unknown operation nginx.
lily-hammer@lilyhammer-H97N:~$ systemctl nginx.service restart
Unknown operation nginx.service.
lily-hammer@lilyhammer-H97N:~$ sudo apt-get install proxychains
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.
lily-hammer@lilyhammer-H97N:~$ sudo dpkg --configure -a
Setting up nginx-full (1.13.6-2) ...
^Cdpkg: error processing package nginx-full (--configure):
subprocess installed post-installation script was interrupted
Processing triggers for libc-bin (2.26-0ubuntu2) ...
Processing triggers for man-db (2.7.6.1-2) ...
Setting up libproxychains3:amd64 (3.1-7) ...
dpkg: dependency problems prevent configuration of nginx:
nginx depends on nginx-full (<< 1.13.6-2.1~) | nginx-light (<< 1.13.6-2.1~) | nginx-extras (<< 1.13.6-2.1~); however:
Package nginx-full is not configured yet.
Package nginx-light is not installed.
Package nginx-extras is not installed.
nginx depends on nginx-full (>= 1.13.6-2) | nginx-light (>= 1.13.6-2) | nginx-extras (>= 1.13.6-2); however:
Package nginx-full is not configured yet.
Package nginx-light is not installed.
Package nginx-extras is not installed.
dpkg: error processing package nginx (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of set:
set depends on nginx; however:
Package nginx is not configured yet.
Package nginx-full which provides nginx is not configured yet.
dpkg: error processing package set (--configure):
dependency problems - leaving unconfigured
Setting up proxychains (3.1-7) ...
Processing triggers for libc-bin (2.26-0ubuntu2) ...
Errors were encountered while processing:
nginx-full
nginx