How to install Nginx from script on Linux CentOS 6.x/RHEL

In previous articles I have installed Nginx guide
1. How to install Nginx on CentOS 6.4 with Yum
2.How to install Nginx 1.4.1 from source on Linux CentOS/RHEL/Fedora
 In the post, I have tutorial install Nginx from script
Step 1:Nginx init script:

#!/bin/sh
#
# nginx Startup script for nginx
#
# chkconfig: - 85 15
# processname: nginx
# config: /etc/nginx/nginx.conf
# config: /etc/sysconfig/nginx
# pidfile: /var/run/nginx.pid
# description: nginx is an HTTP and reverse proxy server
#
### BEGIN INIT INFO
# Provides: nginx
# Required-Start: $local_fs $remote_fs $network
# Required-Stop: $local_fs $remote_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start and stop nginx
### END INIT INFO
 
# Source function library.
. /etc/rc.d/init.d/functions
 
if [ -f /etc/sysconfig/nginx ]; then
. /etc/sysconfig/nginx
fi
 
prog=nginx
nginx=${NGINX-/usr/sbin/nginx}
conffile=${CONFFILE-/etc/nginx/nginx.conf}
lockfile=${LOCKFILE-/var/lock/subsys/nginx}
pidfile=${PIDFILE-/var/run/nginx.pid}
SLEEPMSEC=100000
RETVAL=0
 
start() {
echo -n $"Starting $prog: "
 
daemon --pidfile=${pidfile} ${nginx} -c ${conffile}
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch ${lockfile}
return $RETVAL
}
 
stop() {
echo -n $"Stopping $prog: "
killproc -p ${pidfile} ${prog}
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}
}
 
reload() {
echo -n $"Reloading $prog: "
killproc -p ${pidfile} ${prog} -HUP
RETVAL=$?
echo
}
 
upgrade() {
oldbinpidfile=${pidfile}.oldbin
 
configtest -q || return 6
echo -n $"Staring new master $prog: "
killproc -p ${pidfile} ${prog} -USR2
RETVAL=$?
echo
/bin/usleep $SLEEPMSEC
if [ -f ${oldbinpidfile} -a -f ${pidfile} ]; then
echo -n $"Graceful shutdown of old $prog: "
killproc -p ${oldbinpidfile} ${prog} -QUIT
RETVAL=$?
echo
else
echo $"Upgrade failed!"
return 1
fi
}
 
configtest() {
if [ "$#" -ne 0 ] ; then
case "$1" in
-q)
FLAG=$1
;;
*)
;;
esac
shift
fi
${nginx} -t -c ${conffile} $FLAG
RETVAL=$?
return $RETVAL
}
 
rh_status() {
status -p ${pidfile} ${nginx}
}
 
# See how we were called.
case "$1" in
start)
rh_status >/dev/null 2>&1 && exit 0
start
;;
stop)
stop
;;
status)
rh_status
RETVAL=$?
;;
restart)
configtest -q || exit $RETVAL
stop
start
;;
upgrade)
upgrade
;;
condrestart|try-restart)
if rh_status >/dev/null 2>&1; then
stop
start
fi
;;
force-reload|reload)
reload
;;
configtest)
configtest
;;
*)
echo $"Usage: $prog {start|stop|restart|condrestart|try-restart|force-reload|upgrade|reload|status|help|configtest}"
RETVAL=2
esac
 
exit $RETVAL

Step 2:Set propper permissions to the nginx init script:

#chmod 755 /etc/init.d/nginx -v

Step 3:Add the script to the default runlevels:

#chkconfig nginx on

Step 4:Final step, test this out by running:
#/etc/init.d/nginx start
#/etc/init.d/nginx stop 
#/etc/init.d/nginx restart