572 B
572 B
certexp
report certificate expiry for a collection of servers, which yields equivalent information to:
$ echo | openssl s_client -connect $hostname:$port 2> /dev/null | openssl x509 -noout -dates | grep notAfter
example usage
$ cat sites.txt
apple.com
google.com
amazon.com
imap.gmail.com:993
$ cat sites.txt | certexp
apple.com 2018-10-31 23:59:59 +0000 UTC
google.com 2018-02-13 15:19:00 +0000 UTC
amazon.com 2018-09-21 23:59:59 +0000 UTC
imap.gmail.com 2018-02-27 09:29:00 +0000 UTC