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[RyAn]

Hi,
I am new to this forum so I don't actually know that do people help with the terminal of the Raspberry Pi so if they don't than I shall ask on the other forum.
My problem is here:(I am new to here so I don't know how to upload image on this.) First, I opened the Terminal of the raspberry pi. Then I tried some of the commands like "sudo apt-get update". It worked very well and it doesn't ask for "(9,009 kb of 16 Mb will be used, please enter yes or no (Y/n).). But then I tried "sudo apt-get upgrade" and it does ask for the up here. I enter Y and then it appears something like error and it said "server certificate verification failed". I go and search internet about this problem and tried some commands that it suggest will work. But after trying a lot of commands, it still say the same error. I don't know how to fix the problem so I decided to ask in here.
Thanks

[metulburr]

There are some people that have a pi here.

Run the your "error raspberry pi" in a search engine and you will get some ideas on things to try

What things have you tried?

Update is updating the repositories, upgrade is the actual update. It's Linux but I am unsure if something slightly different because of it being a pi in which I have never owned or operated one.

[DeaD_EyE]

server certificate verification failed

Is the local date set correct? If the year is wrong, this could invalidate all existing certificates on the internet.

If you want to annoy someone, set the date back to the year 2011 and nothing will work.