On Fri, Sep 26, 2025 at 3:47 PM olivares33561 via users
<[email protected]> wrote:
>
> Dear kind fedora users,
>
> I have a little problem with certificates. There are certificates for Mac
> and for Windows, but none for Linux. Machine connects on some websites but
> for others, not even advanced option works. How does one install these on
> Linux ? Is there an idiot proof way of installing these?
>
> A *.DER file
> A *.cer
>
> Cannot browse or update. Thanks & kind regards,
1. Convert the certificates to PEM format.
- openssl x509 -in <infile.der> -inform DER -out <outfile.pem>
-outform PEM
2. Copy the PEM formatted certificates to the new location
- sudo cp *.pem /etc/pki/ca-trust/source/anchors/
3. Update the CA Store
- sudo update-ca-trust
Jeff
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