HEL / Centos 6: Install Nginx Using Yum Command

source: http://www.cyberciti.biz/faq/install-nginx-centos-rhel-6-server-rpm-using-yum-command/

RHEL / Centos 6: Install Nginx Using Yum Command
by NIX CRAFT on JANUARY 7, 2013 · 6 COMMENTS· LAST UPDATED JANUARY 7, 2013
in CENTOS, NGINX, REDHAT AND FRIENDS
How can I install Nginx web server On CentOS Linux 6 or Red Hat Enterprise Linux 6 using yum command?

Tutorial details
Difficulty Intermediate (rss)
Root privileges Yes
Requirements CentOS/RHEL
yum
Estimated completion time N/A

Recently, nginx web project started to distribute binary packages using nginx yum repository. You can either create /etc/yum.repos.d/nginx.repo or directly install rpm package. This package contains yum configuration file and a public PGP key necessary to authenticate signed RPMs.
Step #1: Install nginx repo

Type the following wget command to install nginx yum configuration file:
# cd /tmp

CentOS Linux v6.x user type the following command:
# wget http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
# rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm

RHEL v6.x user type the following command:
# wget http://nginx.org/packages/rhel/6/noarch/RPMS/nginx-release-rhel-6-0.el6.ngx.noarch.rpm
# rpm -ivh nginx-release-rhel-6-0.el6.ngx.noarch.rpm

Sample outputs:

warning: nginx-release-rhel-6-0.el6.ngx.noarch.rpm: Header V4 RSA/SHA1 Signature, key ID 7bd9bf62: NOKEY
Preparing... ########################################### [100%]
1:nginx-release-rhel ########################################### [100%]
Step #2: Install nginx web-server

Type the following yum command to install nginx web-server:
# yum install nginx

Sample outputs:

Loaded plugins: product-id, rhnplugin, security, subscription-manager
Updating certificate-based repositories.
Unable to read consumer identity
nginx | 1.3 kB 00:00
nginx/primary | 4.8 kB 00:00
nginx 33/33
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 0:1.2.6-1.el6.ngx will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
nginx x86_64 1.2.6-1.el6.ngx nginx 361 k

Transaction Summary
================================================================================
Install 1 Package(s)

Total download size: 361 k
Installed size: 835 k
Is this ok [y/N]: y
Downloading Packages:
nginx-1.2.6-1.el6.ngx.x86_64.rpm | 361 kB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
Installing : nginx-1.2.6-1.el6.ngx.x86_64 1/1
----------------------------------------------------------------------

Thanks for using NGINX!

Check out our community web site:
* http://nginx.org/en/support.html

If you have questions about commercial support for NGINX please visit:
* http://www.nginx.com/support.html

----------------------------------------------------------------------
Installed products updated.
Verifying : nginx-1.2.6-1.el6.ngx.x86_64 1/1

Installed:
nginx.x86_64 0:1.2.6-1.el6.ngx

Complete!

Step #3: Turn on nginx service

Type the following command:
# chkconfig nginx on

How do I start / stop / restart nginx web-server?

Type the following commands:
# service nginx start
# service nginx stop
# service nginx restart
# service nginx status
# service nginx reload

Step #4: Configuration files

Default configuration directory: /etc/nginx/
Default SSL and vhost config directory: /etc/nginx/conf.d/
Default log file directory: /var/log/nginx/
Default document root directory: /usr/share/nginx/html
Default configuration file: /etc/nginx/nginx.conf
Default server access log file: /var/log/nginx/access.log
Default server access log file: /var/log/nginx/error.log
To edit the nginx configuration file, enter:
# vi /etc/nginx/nginx.conf

Set or update worker_processes as follows (this must be set to CPU(s) in your system. Use the lscpu | grep '^CPU(s)' command to list the number of CPUs in the server)

worker_processes 2;
Turn on gzip support:

gzip on;
Save and close the file. Edit the file /etc/nginx/conf.d/default.conf, enter:
# vi /etc/nginx/conf.d/default.conf

Set IP address and TCP port number:

listen 202.54.1.1.1:80;
Set server name:

server_name www.cyberciti.biz;
Save and close the file. Start the server:
# service nginx start

Verify that everything is working:
# netstat -tulpn | grep :80
# ps aux | grep nginx

Firewall configuration: Open TCP port # 80

Edit the file /etc/sysconfig/iptables, enter:
# vi /etc/sysconfig/iptables

Add the following lines, ensuring that they appear before the final LOG and DROP lines for the INPUT chain to open port 80:


-A INPUT -m state --state NEW -p tcp --dport 80 -j ACCEPT

Save and close the file. Finally, restart the firewall:
# service iptables restart