How to Add Root CAs to Ubuntu

Reference: https://ubuntu.com/server/docs/install-a-root-ca-certificate-in-the-trust-store 

 Install the CA certificate package: 

 sudo apt-get install -y ca-certificates 

 Now, you can install any local intranet root CA, with this: 

 NOTE: We are copying in the .crt file. Once the trust bundle is created, with a later step, the file will be converted to PEM format. 

 sudo cp ogsofttech.lan_ca.crt /usr/local/share/ca-certificates 

 Once you have all the certificates loaded, you need to add them to the trust store, with this: 

 sudo update-ca-certificates 

 Once done, you can verify that your certificate is in pem format: 

 sudo ls /etc/ssl/certs/ | grep ogsofttech.lan_ca 

 You will see something like this, if loaded into the trust bundle: 

 

 If you are looking for the local intranet Root CA certificate, see this:  Current Intranet Root CA Certificate