Having issues with Let’s Encrypt Certificate in Curl or other tools?

Do you have any issues with your applications or curl command doesn’t work with error complaining about certificates?

I’ve been using Let’s Encrypt for a while, and recently faced with issues after migrating my application to another host. Then I realised that it’s not trusting Let’s Encrypt generated certificates.

For curl or other applications that make use of it, make sure that you set an environment variable pointing to your Let’s Encrypt CA

export SET CURL_CA_BUNDLE=<path_to_your_letsencrypt_ca.pem>