simply to install nginx for centos7

nginx-install.sh

#!/usr/bash
NGINX_VERSION=1.20.2
NGINX_DOWNLOAD_URL="http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz"
NGINX_SAVED_COMPRESSED_FILENAME=nginx.tar.gz
NGINX_COMPILE_DIR=/usr/local/nginx_compile
NGINX_INSTALL_DIR=/usr/local/nginx
NGINX_BIN=${NGINX_INSTALL_DIR}/bin/nginx
NGINX_LOG_DIR=/var/log/nginx
NGINX_RUN_DIR=/var/run/nginx
NGINX_PID=$NGINX_RUN_DIR/nginx.pid
REQUIRED_SOFTWARE_LIST=( wget tar sed )
WWW_DIR=/var/www/html
function check_software() {
    check_software_bool $1
    if [ $? == 1 ]; then
        echo "${1} installed"
    else
        echo "${1} not installed"
        echo "start to install ${1}"
        yum install $1
    fi
}
function check_software_bool() {
    RESULT=`whereis $1`
    RESULT_LENGTH=`echo -n $RESULT | wc -c`
    PACK_LENGTH=`echo -n $1 | wc -c`
    PACK_LENGTH=`expr $PACK_LENGTH + 1`
    if [ $RESULT_LENGTH -gt $PACK_LENGTH ]; then
        return 1
    else
        return 0
    fi
}
function required_software_check() {
    for i in "${REQUIRED_SOFTWARE_LIST[@]}"
    do
        check_software $i
    done
}
function install() {
    yum update -y
    required_software_check
    wget -O $NGINX_SAVED_COMPRESSED_FILENAME $NGINX_DOWNLOAD_URL
    mkdir -p $NGINX_COMPILE_DIR
    current_dir=$(pwd)
    tar -zxf $NGINX_SAVED_COMPRESSED_FILENAME --strip-components 1 -C $NGINX_COMPILE_DIR
    mkdir -p ${NGINX_INSTALL_DIR}
    mkdir ${NGINX_INSTALL_DIR}/bin
    mkdir ${NGINX_INSTALL_DIR}/module
    mkdir -p ${NGINX_LOG_DIR}
    mkdir -p ${NGINX_RUN_DIR}
    yum -y groupinstall "Development Tools"
    #require pcre pcre-devel zlib openssl openssl-devel
    yum -y install pcre pcre-devel zlib openssl openssl-devel gd gd-devel
    cd $NGINX_COMPILE_DIR
    ./configure --prefix=${WWW_DIR} --sbin-path=${NGINX_BIN} --conf-path=${NGINX_INSTALL_DIR}/nginx/nginx.conf --http-log-path=${NGINX_LOG_DIR}/access.log --error-log-path=${NGINX_LOG_DIR}/error.log --with-pcre  --lock-path=/var/lock/nginx.lock --pid-path=${NGINX_PID} --with-http_ssl_module --with-http_image_filter_module=dynamic --modules-path=${NGINX_INSTALL_DIR}/modules --with-http_v2_module --with-stream=dynamic --with-http_addition_module --with-http_mp4_module
    make
    make install
    groupadd nginx
    useradd -r -g nginx nginx
    chown -R nginx:nginx $NGINX_LOG_DIR
    chown -R nginx:nginx $NGINX_RUN_DIR
    chown -R nginx:nginx $NGINX_INSTALL_DIR
    chown -R nginx:nginx $WWW_DIR
    sed -i '1 i\user  nginx nginx;' ${NGINX_INSTALL_DIR}/nginx/nginx.conf
    sed -i '1 i\error_log  '${NGINX_LOG_DIR}'/\error.log;' ${NGINX_INSTALL_DIR}/nginx/nginx.conf
    sed -i '/pid/d' ${NGINX_INSTALL_DIR}/nginx/nginx.conf
    sed -i '1 i\pid        '${NGINX_PID}';' ${NGINX_INSTALL_DIR}/nginx/nginx.conf
    cat << EOT > /lib/systemd/system/nginx.service
[Unit]
Description=The NGINX HTTP and reverse proxy server
After=syslog.target network-online.target remote-fs.target nss-lookup.target
Wants=network-online.target

[Service]
User=root
Type=forking
PIDFile=${NGINX_PID}
ExecStartPre=${NGINX_INSTALL_DIR}/bin/nginx -t
ExecStart=${NGINX_INSTALL_DIR}/bin/nginx
ExecReload=${NGINX_INSTALL_DIR}/bin/nginx -s reload
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOT
    setcap cap_net_bind_service=+ep $NGINX_BIN
    systemctl daemon-reload
    systemctl enable --now nginx
    cd ${current_dir}
    rm -rf $NGINX_SAVED_COMPRESSED_FILENAME
    cat << EOF
nginx install finished!
configure: ${NGINX_INSTALL_DIR}/nginx/nginx.conf
www dir: ${WWW_DIR}
EOF
}
function remove() {
    systemctl disable nginx
    systemctl stop nginx
    rm -rf $NGINX_INSTALL_DIR
    rm -rf $NGINX_LOG_DIR
    rm -rf $NGINX_RUN_DIR
    rm -rf /lib/systemd/system/nginx.service
    systemctl daemon-reload
    userdel nginx > /dev/null
    groupdel nginx > /dev/null
}
function help() {
    cat << EOF
    Nginx install helper!!!
    usage: 
    ./nginx.sh menu
    install: install nginx
    remove: remove nginx
EOF
}
function main() {
    if [ $# -lt 1 ]; then
        help
    else
        case $1 in
            install)
                install
            ;;
            remove)
                remove
            ;;
            *)
                echo 'command not found!'
                help
            ;;
        esac
    fi
}

main $@