How to Fix Brightness Control Ubuntu Linux [Solved]

Hello linuxer,... Thinking about screen light / brightness in ubuntu, until now I still often read it thread in some forums and that come ...Read more »

W: GPG Error The following signatures couldnt be verified because the public key is not available

Hello linuxer, do you have got experienced about error like this pic, when type "sudo apt-get update" on terminal. Don't ...Read more »