let me explain again, i tried installing Signal app from https://signal.org/en/download/# followed instruction but after i executed 2nd command (visit link) it was working but no new line was showed to execute next command to install so i closed terminal then i got some error 3rd line sudo something like that so a user suggested i go to a location and remove 3rd line "sudo apt-get update && sudo apt-get install signal" so i erased it from it using nano . still i coudnt install so i just used "rm /etc/apt/sources.list.d/signal-xenial.list " to remove the problem. Error Image
when i execute "sudo apt-get update" This errors on line 14 and below. Now i don't know what are these errors ? i think i don't have a release files and i've no idea what it is. so can you guys help me understand and resolve?