Nginx deployment script

cat nginx.sh

#!/bin/bash
echo -e "\033[31m====start install nginx====\033[0m"

yum (){
echo -e "\033[32m====安装前的准备工作====\033[0m"
yum install -y gcc-c++ zlib zlib-devel openssl openssl--devel pcre pcre-devel #> 2&>1 /dev/null
}

work (){
if [ -e /opt/nginx-1.16.1.tar.gz ];then
        tar zxf /opt/nginx-1.16.1.tar.gz #> 2&>1 /dev/null
        cd /opt/nginx-1.16.1
    else
        wget -P /opt/ https://nginx.org/download/nginx-1.16.1.tar.gz #> 2&>1 /dev/null
        tar zxf /opt/nginx-1.16.1.tar.gz #> 2&>1 /dev/null
        cd /opt/nginx-1.16.1
fi
}

user (){
echo -e "\033[36m====检查是否存在ngins用户====\033[0m"
if [ `grep "nginx" /etc/passwd | wc -l` -eq 0 ]; then
            echo -e  "\033[37m=adding user nginx=\033[0m"
                groupadd nginx
                useradd -s /sbin/nologin -M -g nginx nginx
        else
                echo -e "\033[37m=user nginx exsits=\033[0m"
fi
}

configure (){
echo -e "\033[33m====configuring nginx,please wait====\033[0m"
./configure --prefix=/usr/local/nginx

if [ $? -ne 0 ];then
        echo "configure failed ,please check it out!"
else
        echo "make nginx, please wait!"
        make
fi

if [ $? -ne 0 ];then
        echo "make failed ,please check it out!"
else
        echo "install nginx, please wait!"
        make install
fi
chown -R nginx.nginx /usr/local/nginx
}

start () {
    /usr/local/nginx/sbin/nginx
}

reload () {
    nginx=`ps -ef |grep -v grep |grep nginx |awk -F" " '{print $2}'`
    for i in $nginx;
    do
            kill -9 $i
    done
}

yum
work
user
configure