Copy the certificate to /etc/pki/ca-trust/source/anchors and run update-ca-trust. If you get a message stating "The dynamic CA configuration feature is in the disabled state", then you will need to run update-ca-trust enable first.
SUSE
Copy the certificate into /etc/ssl/certs (with ".pem" extension) and run update-ca-certificates
Ubuntu
Copy the certificate into /usr/local/share/ca-certificates/extra (with ".crt" extension) and run the command dpkg-reconfigure ca-certificates
AIX
Copy the certificate into /var/ssl/certs
HP-UX
Copy the certificate into /opt/openssl/certs
Solaris
Copy the certificate into /etc/certs
Self signed certificates are not supported. If you have a self signed certificate, you will need to add "DisableSSLVerify":true in your settings.json file.