使用 Linux Mint 18.3 时，我安装了 nginx，它运行良好。出于某种原因，我需要卸载它，我使用命令卸载它：
sudo apt purge nginx -y
sudo rm -rf /etc/nginx
sudo apt autoremove
然后当我稍后再次需要它时，我尝试：
sudo apt install nginx -y
它告诉我以下错误：这里是终端的所有行：
sudo apt install nginx -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
nginx-common nginx-core
Suggested packages:
fcgiwrap nginx-doc
The following NEW packages will be installed:
nginx nginx-common nginx-core
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/458 kB of archives.
After this operation, 1,482 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Preconfiguring packages ...
Selecting previously unselected package nginx-common.
(Reading database ... 235105 files and directories currently installed.)
Preparing to unpack .../nginx-common_1.10.3-0ubuntu0.16.04.2_all.deb ...
Unpacking nginx-common (1.10.3-0ubuntu0.16.04.2) ...
Selecting previously unselected package nginx-core.
Preparing to unpack .../nginx-core_1.10.3-0ubuntu0.16.04.2_amd64.deb ...
Unpacking nginx-core (1.10.3-0ubuntu0.16.04.2) ...
Selecting previously unselected package nginx.
Preparing to unpack .../nginx_1.10.3-0ubuntu0.16.04.2_all.deb ...
Unpacking nginx (1.10.3-0ubuntu0.16.04.2) ...
Processing triggers for ureadahead (0.100.0-19) ...
ureadahead will be reprofiled on next reboot
Processing triggers for ufw (0.35-0ubuntu2) ...
Processing triggers for systemd (229-4ubuntu21.2) ...
Setting up nginx-common (1.10.3-0ubuntu0.16.04.2) ...
Setting up nginx-core (1.10.3-0ubuntu0.16.04.2) ...
Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
invoke-rc.d: initscript nginx, action "start" failed.
● nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Tue 2018-05-29 22:56:08 +06; 18ms ago
Process: 2929 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=1/FAILURE)
May 29 22:56:08 ahs-pc systemd[1]: Starting A high performance web server a.....
May 29 22:56:08 ahs-pc nginx[2929]: nginx: [emerg] open() "/etc/nginx/nginx...y)
May 29 22:56:08 ahs-pc nginx[2929]: nginx: configuration file /etc/nginx/ng...ed
May 29 22:56:08 ahs-pc systemd[1]: nginx.service: Control process exited, c...=1
May 29 22:56:08 ahs-pc systemd[1]: Failed to start A high performance web s...r.
May 29 22:56:08 ahs-pc systemd[1]: nginx.service: Unit entered failed state.
May 29 22:56:08 ahs-pc systemd[1]: nginx.service: Failed with result 'exit-...'.
Hint: Some lines were ellipsized, use -l to show in full.
dpkg: error processing package nginx-core (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of nginx:
nginx depends on nginx-core (>= 1.10.3-0ubuntu0.16.04.2) | nginx-full (>= 1.10.3-0ubuntu0.16.04.2) | nginx-light (>= 1.10.3-0ubuntu0.16.04.2) | nginx-extras (>= 1.10.3-0ubuntu0.16.04.2); however:
Package nginx-core is not configured yet.
Package nginx-full is not installed.
Package nginx-light is not installed.
Package nginx-extras is not installed.
nginx depends on nginx-core (<< 1.10.3-0ubuntu0.16.04.2.1~) | nginx-full (<< 1.10.3-0ubuntu0.16.04.2.1~) | nginx-light (<< 1.10.3-0ubuntu0.16.04.2.1~) | nginx-extras (<< 1.10.3-0ubuntu0.16.04.2.1~); however:
Package nginx-core is not configured yet.
Package nginx-full is not installed.
Package nginx-light is not installed.
Package nginx-extras is not installed.
dpkg: error processing package nginx (--configure):
dependency problems - leaving No apport report written because the error message indicates its a followup error from a previous failure.
unconfigured
Errors were encountered while processing:
nginx-core
nginx
E: Sub-process /usr/bin/dpkg returned an error code (1)
我也尝试过强制安装，如下所示：
sudo apt install -f nginx
但会引发同样的错误！
答案1
您忘记停止旧的 nginx 进程，因此新的进程无法启动（例如端口 80 正在使用中）。