檢查url狀態，並輸出為md檔

checkurls.sh

#!/bin/bash
# -----------------------
# |+++| version 1.0.0
# |+++| Rex Tsou
# |+++| 2016/09/29
# usage------------------
# $ ./checkurls.sh [file]
# -----------------------
echo '' >> url_status.md
echo `date` >> url_status.md
echo $1 	>> url_status.md
echo '----' >> url_status.md
while read url
do
    urlstatus=$(curl -o /dev/null --silent --head --write-out '%{http_code}\n' "$url")
    if   [[ $urlstatus =~ ^000$ ]] ; then  #Regular Expression check http status code
    	echo "$url  __"$urlstatus"__  No valid HTTP response <<<<<" >> url_status.md
    elif [[ $urlstatus =~ ^3..$ ]] ; then
    	echo "$url  __"$urlstatus"__  Redirection" 	>> url_status.md
    elif [[ $urlstatus =~ ^4..$ ]] ; then
    	echo "$url  __"$urlstatus"__  Client Error <<<<<" >> url_status.md
    elif [[ $urlstatus =~ ^5..$ ]] ; then
    	echo "$url  __"$urlstatus"__  Server Error <<<<<" >> url_status.md
    else
    	echo "$url  __"$urlstatus"__" >> url_status.md
    fi
done < $1
echo '----' >> url_status.md