Script for installing redis-server under user

#! /bin/bash

is_number()
{
echo "$1" | awk '$0 ~/[^0-9]/ { print "NA" }'>/tmp/numcheck$$$
if [ "`cat /tmp/numcheck$$$|xargs`" == NA ] ;then
   echo "NA"
fi
}


check_empty()
{
if [ "$1" == "" ] ;then
    echo "Blank input please try again !!!!!!!!!!!"
    exit
else
    private=": ; = root passwd user `ls |xargs`"
    check=`echo $private |grep -w $1 |xargs`
    if [ "$check" != "" ]  ;then
        echo "Reserved Word Please Retry :$private  "
        exit
    fi
fi
}

install_redis()
{
echo -e "\033[1m Redis server install Require sudoers user \033[0m"
echo "Checking if redis already installed"
sleep 3
    if [ -f "/usr/local/bin/redis-server" ] ; then
        echo "Redis installation already exits skipping source compile"
            if [ -f "/usr/bin/redis-server" ] ; then
                  echo "Redis installation already exits skipping source compile"
            fi
    else
    cd ~/
    if [ -f "~/redis-2.2.14.tar.gz" ] ;then
        mv ~/redis-2.2.14* ~/redis-2.2.14_`date +%Y-%m-%d`
    fi
    wget http://redis.googlecode.com/files/redis-2.2.14.tar.gz
    tar xzf redis-2.2.14.tar.gz
    cd redis-2.2.14/ && make && sudo make install && mkdir -p ~/redis && sudo  cp utils/redis_init_script /etc/init.d/Restart_Redis && cp redis.conf ~/redis/redis.conf &&  cd - && echo -e "\033[1m Enter the Redis port for custom application \033[0m"
    read port_input
        if [ "$port_input" == "" ] ; then
            echo "No redis port Specified continuing with default :recommends manual setting after Setup"
            port_check="`is_number $port_input |xargs`"
            if [ "$port_check" == "NA" ] ;then
                echo "invalid redis port Specified continuing with default :recommends manual setting after Setup"
            else
                echo "HELLO GOOD  $port_input"
            fi
        fi
    fi
}


yes_no()
{
if [ "$*" != "yes" ] ; then
                echo "Thanks please try again ...."
        exit 1
              
fi

}

install_redis