I'm trying to install one software but showing this error.

I'm trying to install one software but showing this error.

Edit sources.list and comment out the duplicate entry.
Edit sources.list:
sudo nano /etc/apt/sources.list
Place a # in front of the duplicate entry
Save:
Ctrl + X, Y, Enter
Update:
sudo apt-get update
Now try again.
/etc/apt/sources.list.d
– Antony
Dec 08 '15 at 14:22
sources.listand commenting out the duplicate entry?sudo nano /etc/apt/sources.listand place a#in front of the duplicate entry, then save. – Louis Matthijssen Apr 27 '14 at 11:16