I installed confluence but cannot visit by ip:port

[wbljsslz]

I want to install confluence in my linux webserver. I checked Confluence Software Requirements

clyde@localhost:~$ java -version
java version "1.7.0_85"
OpenJDK Runtime Environment (IcedTea 2.6.1) (7u85-2.6.1-5ubuntu0.14.04.1)
OpenJDK 64-Bit Server VM (build 24.85-b03, mixed mode)

I follow the guide to install confluence 

clyde@localhost:~/Downloads$ ls
atlassian-confluence-5.8.15-x64.bin
clyde@localhost:~/Downloads$ sudo ./atlassian-confluence-5.8.15-x64.bin
Unpacking JRE ...
Starting Installer ...
This will install Confluence 5.8.15 on your computer.
OK [o, Enter], Cancel [c]
Choose the appropriate installation or upgrade option.
Please choose one of the following:
Express Install (uses default settings) [1],
Custom Install (recommended for advanced users) [2, Enter],
Upgrade an existing Confluence installation [3]
1
See where Confluence will be installed and the settings that will be used.
Installation Directory: /opt/atlassian/confluence
Home Directory: /var/atlassian/application-data/confluence
HTTP Port: 8090
RMI Port: 8000
Install as service: Yes
Install [i, Enter], Exit [e]

Extracting files ...
confluence/includes/js/analytics-support/
Please wait a few moments while Confluence starts up.
Launching Confluence ... Installation of Confluence 5.8.15 is complete
Your installation of Confluence 5.8.15 is now ready and can be accessed via
your browser.
Confluence 5.8.15 can be accessed at http://localhost:8090
Finishing installation ...

After that I type: http://106.185.31.9:8090/ in browser, but is shows "This webpage is not available"

What do I miss or How can I see the home page?

[Nic Brough -Adaptavist-]

Have you got a firewall on your server that disallows connections to port 8090?  Is the IP address you give definitely the machine you have installed it on?