How to modify the Linux address of Web services such as Nginx and Tomcat in An listening port ECS instance -

Introduction

This topic describes how to change the Linux addresses of Nginx, Tomcat, and Apache Web services on listening port ECS instances.

If you have already installed the Web server in the Linux, you can refer to the following documents to install and start the corresponding services:
- Nignx: build LNMP environment (CentOS 6)
- Tomcat: manually deploy Java Web projects
If you have already added security group rules to the security group to which the instance belongs, configure the HTTP protocol port to be allowed. For example, Nginx defaults to port 80 of TCP while Tomcat defaults to port 8080 of TCP.

Remotely log on to the ECS instance of the Linux. For more information about how to log on to a Linux, seeconnect to a Linux instance by using a user name and password.
Run the following command to check whether the port is properly listened on:
```
netstat -an | grep 80
```
The command output is as follows. If the command output is different from the information shown in the following figure, you must modify the listening port address.
Run the following command to find the nginx.conf file: The nginx path is typically /etc/nginx/nginx.conf.
```
find / -name nginx.conf 
```
Follow these steps to modify the nginx.conf file:
1. Run the following command to edit the file:
```
vim /etc/nginx/nginx.conf
```
2. Press the I key to enter the edit mode.
3. Modify the following information in the http.
```
server {
 listen       80;
 server_name  localhost;
```
  The modified information is similar to the following.
```
server {
 listen       [$IP]:80;
 server_name  localhost;
```
  Note:[$IP] is the public IP address of the instance.
4. Press the Esc key to exit the editing mode, and enter ": wq" to save and exit.
Restart the Nginx service.

You must modify the listening port in the server.xml file of Tomcat. Perform the following steps:

Remotely log on to the ECS instance of the Linux.
Run the following command to find the /conf/server.xml file. The path is generally empty.
```
find / -name server.xml 
```
Modify the server.xml file.
1. Run the following command to edit the file:
```
vim /usr/local/tomcat/conf/server.xml
```
2. Press the I key to enter the edit mode.
3. Add Connector information to the address.
```
<Connector port="8080"
     protocol="HTTP/1.1"
     address="[$IP]"
```
  The command output is as follows: x.x.x.x indicates the public IP address of the instance.
Restart the Tomcat service.

Remotely log on to the ECS instance of the Linux.
Run the following command to find the nginx.conf file: The path is generally empty.
```
find / -name httpd
```
Follow these steps to modify the httpd.conf file:
1. Run the following command to edit the file:
```
vim /etc/httpd/conf/httpd.conf
```
2. Press the I key to enter the edit mode.
3. Replace the information in the Listen section with the following to modify the listening port, save the configuration, and exit.
```
Listen [$Port]
```
  Note:[$Port] is the Port you want to use. The default Port is 80.
Run the following command to restart Apache.
```
service httpd restart
```