I wanted to mount my webdav share which is using certificate backed by CA "Let's Encrypt". Unfortunately pantheon-files declare that CA is not trusted (not found). This CA is perfectly workable and fine in firefox. Do they use different cert store, pantheon-files and firefox?

  • I was not trying to ask for fixing a bug, I was asking for help how to update CA store which is used by pantheon-files.
    – richo
    Commented Dec 27, 2016 at 20:16
  • It seems that one not get here any help only he is always showed s door to leave :-( pity.
    – richo
    Commented Dec 27, 2016 at 20:19
  • 1
    For those who prefer answers in place of bugging here is the solution: go to lets encrypt web site (or any other missing CA cert site) and follow this: superuser.com/questions/437330/… don't forget to rename cert with extension .crt
    – richo
    Commented Dec 27, 2016 at 20:37
  • apologies that your question was misunderstood. lemonslice submitted a few edits to try to clarify. If you were able to find the answer, can you please post it below as an answer? Commented Dec 28, 2016 at 19:12

1 Answer 1


Get the CA which is missing. In my case:go to lets encrypt web site (or any other missing CA cert site). Copy the CA in PEM format (the format that has ----BEGIN CERTIFICATE---- in it) into /usr/local/share/ca-certificates and name it with a .crt file extension.

Then run sudo update-ca-certificates

You can verify if this worked by looking for the certificate that you just added in /etc/ssl/certs/ca-certificates.crt/

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