I am trying to verify my .cer
openssl verify /tmp/RSA256.cer
But i have error
unable to load certificate 140244003129152:error:0909006C:PEM routines:get_name:no start line:crypto/pem/pem_lib.c:745:Expecting: TRUSTED CERTIFICATE
Actually i wanted to add cer to trusted
cp /tmp/RSA256.cer /etc/pki/ca-trust/source/anchors/RSA256.cer
update-ca-trust
But when I try to curl
curl url
I have an error
curl: (56) Received HTTP code 403 from proxy after CONNECT