X509
wikipedia:X.509 is a standard defining the format of public key certificates.
Cloudflare certinfo
: https://github.com/cloudflare/cfssl/blob/master/certinfo/certinfo.go[1]
openssl x509 -inform pem -noout -text keytool -printcert -file certificate.pem
openssl x509 -req
openssl s_client -showcerts -connect YOUR_DOMAIN.COM:443 </dev/null 2>/dev/null | openssl x509 -outform PEM > MY_CERTFILE.pem
Error response from daemon: Get https://URL/: x509: certificate signed by unknown authority
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