1.先执行一下命令：
1.1 删除nginx，–purge包括配置文件
sudo apt-get --purge remove nginx
1.2 自动移除全部不使用的软件包
sudo apt-get autoremove
1.3 罗列出与nginx相关的软件
dpkg --get-selections|grep nginx
执行1.3的结果:
stephen@stephen-OptiPlex-390:~$ dpkg --get-selections|grep nginx
nginx install
nginx-common install
nginx-core install
1.4 删除1.3查询出与nginx有关的软件
sudo apt-get --purge remove nginx
sudo apt-get --purge remove nginx-common
sudo apt-get --purge remove nginx-core
这样就可以完全卸载掉nginx包括配置文件
2.查看nginx正在运行的进程，如果有就kill掉
ps -ef |grep nginx
看下nginx还有没有启动,一般执行完1后，nginx还是启动着的，如下：
stephen@stephen-OptiPlex-390:~$ ps -ef |grep nginx
root 7875 2317 0 15:02 ? 00:00:00 nginx: master process /usr/sbin/nginx
www-data 7876 7875 0 15:02 ? 00:00:00 nginx: worker process
www-data 7877 7875 0 15:02 ? 00:00:00 nginx: worker process
www-data 7878 7875 0 15:02 ? 00:00:00 nginx: worker process
www-data 7879 7875 0 15:02 ? 00:00:00 nginx: worker process
stephen 8321 3510 0 15:20 pts/0 00:00:00 grep --color=auto nginx
3.kill nginx进程
sudo kill -9 7875 7876 7877 7879
4.全局查找与nginx相关的文件
sudo find / -name nginx*
5.依依删除4列出的所有文件
sudo rm -rf file
6. 再次重装
sudo apt-get update
sudo apt-get install nginx
3. 装完nginx 之后，无论怎么替换都是显示原始 页面
注：系统 ubuntu 18.04 nginx 版本 1.14.0
3.1 找到配置文件 /etc/nginx/nginx.conf
注释掉下面两行
#include /etc/nginx/conf.d/*.conf;
#include /etc/nginx/sites-enabled/*;
3.png
修改 sendfile ：
sendfile off;
1.png
2.png
完整配置文件如下：
user www-data;
worker_processes auto;
pid /run/nginx.pid;
#include /etc/nginx/modules-enabled/*.conf;
events {
worker_connections 768;
# multi_accept on;
}
http{
server{
listen 80;
server_name localhost;
location / {
root /usr/share/nginx/html;
try_files $uri $uri/ @router;
index index.html;
}
location @router {
rewrite ^.*$ /index.html last;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
##
# Basic Settings
##
sendfile off;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
# server_tokens off;
# server_names_hash_bucket_size 64;
# server_name_in_redirect off;
include /etc/nginx/mime.types;
default_type application/octet-stream;
##
# SSL Settings
##
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
ssl_prefer_server_ciphers on;
##
# Logging Settings
##
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
##
# Gzip Settings
##
gzip on;
# gzip_vary on;
# gzip_proxied any;
# gzip_comp_level 6;
# gzip_buffers 16 8k;
# gzip_http_version 1.1;
# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
##
# Virtual Host Configs
##
#include /etc/nginx/conf.d/*.conf;
#include /etc/nginx/sites-enabled/*;
}
#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
#
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
#
# server {
# listen localhost:110;
# protocol pop3;
# proxy on;
# }
#
# server {
# listen localhost:143;
# protocol imap;
# proxy on;
# }
#}
