1. Nginx的啟動

在Nginx伺服器搭建成功後，要啟動它，Nginx伺服器才能正常執行。啟動程式碼格式如下：

1. Nginx地址-c Nginx配置檔案地址

例項：

1. [email protected]:/usr/local/nginx/sbin$ sudo /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

2. Nginx的停止

Nginx伺服器啟動之後，要想其停止執行，有三種方式，第一種是從容停止，第二種是快速停止，第三種是強制停止。

（1）從容停止

1. [email protected]:/usr/local
   /nginx/sbin$ ps -ef | grep nginx
2. root      76552151013:19?00:00:00 nginx: master process/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
3. nobody    76567655013:19?00:00:00 nginx: worker process                                          
4. xiaosi    84667586014:07 pts/2400:00:00 grep --color=auto nginx

1. [email protected]:/usr/local/nginx/sbin$ sudo kill -QUIT 7655
2. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
3. xiaosi    85057586014:10 pts/2400:00:00 grep --color=auto nginx

（2）快速停止

1. [email protected]:/usr/local/nginx/sbin$ sudo /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
2. [email protected]
   :/usr/local/nginx/sbin$ ps -ef | grep nginx
3. root      88052151014:24?00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
4. nobody    88068805014:24?00:00:00 nginx: worker process                                          
5. xiaosi    88087586014:24 pts/2400:00:00 grep --color=auto nginx

1. [email protected]:/usr/local/nginx/sbin$ sudo kill -TERM 8805
2. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
3. xiaosi    88597586014:26 pts/2400:00:00 grep --color=auto nginx

（3）強制停止

1. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
2. root      88762151014:27?00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
3. nobody    88778876014:27?00:00:00 nginx: worker process                                          
4. xiaosi    89017586014:28 pts/2400:00:00 grep --color=auto nginx

1. [email protected]:/usr/local/nginx/sbin$ sudo pkill -9 nginx
2. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
3. xiaosi    89117586014:28 pts/2400:00:00 grep --color=auto nginx

3. Nginx的重啟

Nginx伺服器在執行的時候，若想對其進行重啟啟動，比如當我們修改了配置檔案，需要讓新配置的檔案生效，就得重啟等。

3.1 在重啟之前我們需要驗證配置檔案是否是正確。

第一種方法：進入nginx的sbin/目錄下：

1. [email protected]:/usr/local/nginx/sbin$ sudo ./nginx -t
2. nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
3. nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

第二種方法：

1. [email protected]:/usr/local/nginx/sbin$ sudo /usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
2. nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
3. nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

3.2 重啟

1. [email protected]:/usr/local/nginx/sbin$ sudo ./nginx -s reload
2. nginx:[alert] kill(8876,1) failed (3:No such process)

我們可以看到我們重啟失敗，主要是因為我們已經關閉了nginx，只有nginx執行中我們才能重啟，所以我們先啟動nginx。

1. [email protected]:/usr/local/nginx/sbin$ sudo /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
2. [email protected]:/usr/local/nginx/sbin$ sudo ./nginx -s reload
3. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
4. root      94412151014:45?00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
5. nobody    94459441014:45?00:00:00 nginx: worker process                                          
6. xiaosi    94477586014:45 pts/2400:00:00 grep --color=auto nginx

從上面可以看到我們先啟動之後，再重啟就可以了。

我們還可以根據發射訊號的方式重啟nginx：

1. [email protected]:/usr/local/nginx/sbin$ ps -ef | grep nginx
2. root      94412151014:45?00:00:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
3. nobody    94459441014:45?00:00:00 nginx: worker process                                          
4. xiaosi    95087586014:48 pts/2400:00:00 grep --color=auto nginx
5. [email protected]:/usr/local/nginx/sbin$ sudo kill -HUP 9441