Check a web site's SSL cert and print the number of days until it expires.
% git clone https://github.com/coyled/certcheck.git
% cd certcheck
% bundle install
% bin/certcheck
Usage: checkcert --domains example.com [foo.example.com <...>]
-d, --domains *DOMAINS domain(s)
-h, --help Show this message
% bin/certcheck -d coyled.com
coyled.com 79.38
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