I have been having trouble using
sudo apt-get update, howevr this is a separate problem. In trying to fix this problem by adding a different mirror in
/etc/apt/sources.list/ I am having trouble. Whenever I open
sources.list with the default RPi text editor and then try to save it after editing, I get this error:
Can't open file to write.
I have been trying but can not figure out why this happens. Any help would be greatly appreciated.