debian ubuntu ca - ghdrako/doc_snipets GitHub Wiki

update-ca-certificates - certificate management - gathers certificates from different folder locations and combines them into a single file.

We can find the combined file stored at /etc/ssl/certs/ca-certificates.crt.

The update-ca-certificates command searches for CA certificates in two locations:

    /usr/share/ca-certificates
    /usr/local/share/ca-certificates

To add a certificate, we can copy the CA certificates to one of these locations with the cp command, and run the update-ca-certificates command:

$ sudo cp cacert.crt /usr/local/share/ca-certificates/
$ sudo update-ca-certificates