I get in some trouble when I tried to update the system
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/apps/binary-amd64/Packages 521 Origin Down [IP: 104.28.24.125 80]
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/trusty-getdeb/apps/binary-i386/Packages 521 Origin Down [IP: 104.28.24.125 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
I tried to follow some old answer but it didn't work just because I didn't download from PPA repository but GetDeb.
I tried to follow this guide in GetDeb but when I enter sudo apt-get update, the terminal still informs about the same error.
Updated with pastebin the source list
Update with new information when sudo apt-get update, this shows a new error:
W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps amd64 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-amd64_Packages)
W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps amd64 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-amd64_Packages)
W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps i386 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.getdeb.net/ubuntu/ trusty-getdeb/apps i386 Packages (/var/lib/apt/lists/archive.getdeb.net_ubuntu_dists_trusty-getdeb_apps_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems