sslssl-certificatex509certificateosquery
Error: failed to find any PEM data in certificate input when start to run fleet server
certificate.cer
When I use cat command to read certificate.cer in my Linux RH server. It come out with those unknown symbol as mentioned in attached picture instead of human readable language such as:
-----BEGIN CERTICATE-----
uiocudcnysyndw77e3fo7nfdslaccu...
-----END CERTIFICATE-----
Solution
This is because CER (or BER or DER) and PEM are different formats. PEM is base64-encoded DER with extra header/footer.
To convert between the former and PEM, use openssl:
openssl x509 -inform der -in certificate.cer -out certificate.pem
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