Where is the ca-bundle file located?

[Chris Blake]

Various support pages like this: https://confluence.atlassian.com/bitbucketserverkb/ssl-certificate-problem-unable-to-get-local-issuer-certificate-816521128.html

say to add root certificates to the ca-bundle file. However for SourceTree, they don't say where this file is located.

If I do a search for that filename, after a clean install, I get a dozen different locations. In addition, some are called ca-bundle, and also ca-bundle.trusted

I've tried editing these files one by one all day, but my error "SSL certificate problem: unable to get local issuer certificate" remains.  I've also tried rebooting in between changes.

Do I need to reboot? Do I need to change all occurrences of that file? And which file do I change -- ca-bundle or ca-bundle.trusted?  Also, the trusted one has slightly different text in it: "-----END TRUSTED CERTIFICATE-----" instead of END CERTIFICATE - does this matter?