Install school web certificate from storage

[jammincomedy]

Hello. I am trying to install a school Web certificate on a Raspberry Pi. First of all, will an Android certificate work on the Pi? We don't have a Linux certificate. Second, how do I access the system tools folder to install the certificate once it's downloaded? When I did it for the Android phones I use for my AP CS Principles class, I just went into settings on the phones. However it doesn't look like the Pi's have a settings folder.

When I clicked on the downloaded certificate, I saw the system tools menu as one option that popped up to open the file. So, I'm guessing that might be the Pi's settings folder. But, the system tools wouldn't open the certificate when I chose it as an option. And, I can't get to system tools through the main menu of the Pi to see if there's a specific tool that might work to open the certificate. Basically, I need to go into a settings or system tools folder on the Pi and choose install from storage and then choose the certificate to have it installed. Thank you.

[DougieLawson]

get the *.crt file on a USB stick
insert that in your RPi (the filemanager will mount it at /media/pi/*)
cd /usr/local/share/ca-certificates/
Create a new folder with sudo mkdir school
sudo cp /media/pi/*/*.crt /usr/local/share/ca-certificates/school
Run sudo update-ca-certificates to install it