6 week check ssl certificate expiration

check_CertExpire.sh

#!/bin/bash

# rough function of http://blog.commandlinekungfu.com/2014/06/episode-179-check-is-in-mail.html

check_CertExpire() {

for d in "$@"; do 
    echo -ne $d\\t; 
    [[ $(( $(date +%s -d "$(echo | openssl s_client -connect www.$d:443 2>/dev/null | 
                            openssl x509 -noout -dates | tail -1 | cut -f2 -d=)") - $(date +%s) ))
       -gt 3628800 ]] && echo GOOD || echo EXPIRING;
done

}