[Bash] Check if a site is online or offline

site-status.sh

#!/bin/bash

FAIL_CODE=6

if [ -z "${1}" ];then
    echo "usage: ${0} example.com"
    exit
fi

check_status(){
    LRED="\033[1;31m" # Light red
    LGREEN="\033[1;32m" #Light green
    NC='\033[0m' # No Color


    curl -sf "${1}" > /dev/null

    if [ ! $? = ${FAIL_CODE} ];then
        echo -e "${LGREEN}${1} is online${NC}"
    else
        echo -e "${LRED}${1} is down${NC}"
    fi
}


check_status "${1}"