sudo-apt-get-update-not-working /etc/apt/sources.list
https://askubuntu.com/questions/586369/sudo-apt-get-update-not-working
5
Follow following steps
-
First Backup your old sources.list,
mv /etc/apt/sources.list /etc/apt/sources.list.back
-
Check your OS version, Release
lsb_release -r
-
Select Country
-
Select Ubuntu Release
-
Select Your choice. Important is first 12 and choose whatever you require
-
Generate new sources list
-
Open your editor like vi or vim
vim /etc/apt/sources.list
-
Save the file
-
Retry with
sudo apt-get update