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yugasalabs-26@yugasalabs-26:~$ sudo apt-get update
[sudo] password for yugasalabs-26: 

Fetched 94.5 kB in 1s (61.3 kB/s)                  
Reading package lists... Done
W: Target Packages (partner/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Packages (partner/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Packages (partner/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Translations (partner/i18n/Translation-en_IN) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Translations (partner/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target DEP-11 (partner/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target DEP-11-icons (partner/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Can't drop privileges for downloading as file '/var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_xenial_InRelease' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
W: Target Packages (partner/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Packages (partner/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Packages (partner/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Translations (partner/i18n/Translation-en_IN) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target Translations (partner/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target DEP-11 (partner/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
W: Target DEP-11-icons (partner/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list.d/canonical_partner.list:1 and /etc/apt/sources.list.d/canonical_partner.list:2
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2 Answers 2

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Check the contents of /etc/apt/sources.list.d/canonical-partners.list if they as well exist in /etc/apt/sources.list. If yes remove either the double lines in /etc/apt/sources.list or your remove that canonical-partner.list file. Second might be an easier solution.

sudo rm /etc/apt/sources.list.d/canonical_partner.list
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Your file /etc/apt/sources.list.d/canonical_partner.list has the same repository configured twice.

You can either edit file and remove the duplicated line(2nd line of the file) or remove this reference for being used in graphical mode by removing/unchecking them.

Editing the file for removing duplicated repositories

  1. Open terminal: ctrl+alt+t
  2. Write sudo gedit /etc/apt/sources.list.d/canonical_partner.list
  3. Remove duplicated lines (2nd line of the file).
  4. Save file using menu: file > save
  5. Close gedit.
  6. Now you can try sudo apt-get update in terminal again.

Disabling/Deleting duplicated repositories in graphical mode

  1. In the side menu, click in System Settings.
  2. In the System lane, click in Software & Updates.
  3. Navigate to Other Software tab.
  4. Find duplicated repositories and uncheck or delete one of them.
  5. Click in Close.
  6. Click in Reload.
  7. Reload itself is equivalent to sudo apt-get update. If everything goes well, you can update whenever you want again!

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