Where to put certificates cacert.pem for cURL?

Ok, I managed to make it works, but I'm not very happy with my solution.

First mistake I was making is that the instruction in the .curlrc file was incorrect.We should use this file the same way we specify options to the "curl" command.So I removed the "equal sign" :

cacert /home/user_me/cacert.pem

With this I was able to make the first part of the command to work :

\curl -L https://get.rvm.io | bash -s stable

The bash part was still failing because rvm was using curl again in root mode.

So I copied my .curlrc file as well into the /root folder.

And it worked !I could even call the standard rvm command :

rvm get stable

But this is a bit tricky, and I would prefer that curl use my cacert.pem file without all those .curlrc files.

Googling more, I found some usefull information here and here.The first reference has a little mistake :When I read the man page of "sudo update-ca-certificates --fresh" command, I realized the guy was puting his file at wrong place.

You have to put your certificate into /usr/share/ca-certificates folder instead of /usr/local/share/ca-certificates , and then append a line for your certificate into the configuration file /etc/ca-certificates.conf (e.g., “my_ca.crt“).Then you may run your "sudo update-ca-certificates --fresh" command.

Note : If you copy your certificate to the /usr/local/share/ca-certificates instead, then you don't need anymore to modify the /etc/ca-certificates.conf configuration file nor run the "sudo update-ca-certificates --fresh" command.

However in my case, for the first solution (/usr/share/ca-certificates) I got an error when I ran the "sudo update-ca-certificates --fresh" command.As second solution, I tried just to put my certificate into /usr/local/share/ca-certificates. But it didn't work.

So I gave up and I kept my two .curlrc files.

So if anybody could point what I was doing wrong, I would be very grateful.