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[Solved][Linux] Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/teamviewer.list:25 and /etc/apt/sources.list.d/teamviewer.list:30

Last Updated on 2021-10-09 by Clay

If we got the following error message when we using sudo apt update command:

Target CNF (main/cnf/Commands-amd64) is configured multiple times in /etc/apt/sources.list.d/teamviewer.list:25 and /etc/apt/sources.list.d/teamviewer.list:30


It may not be teamviewer.list or other packages. What is the meaning of these error?

In fact, it is very simple to put it, this is because there is the setting is duplicated in the teamviewer.list.

Let's take a look at my example.

Solution

We can go to the teamviewer.list to check:

vim /etc/apt/source.list.d/teaviewer.list


We will see the following content:

###   TeamViewer DEB repository list

### NOTE: Manual changes to this file
###        - prevent it from being updated by TeamViewer package updates
###        - will be lost after using the 'teamviewer repo' command
###       The original file can be restored with this command:
###       cp /opt/teamviewer/tv_bin/script/teamviewer.list /etc/apt/sources.list.d/teamviewer.list
###       which has the same effect as 'teamviewer repo default'

### NOTE: It is preferred to use the following commands to edit this file:
###       teamviewer repo                - show current repository configuration
###       teamviewer repo default        - restore default configuration
###       teamviewer repo disable        - disable the repository
###       teamviewer repo main [stable]  - make all TeamViewer packages available (default)
###       teamviewer repo tv14 [stable]  - make TeamViewer 14 packages available
###                             stable     omit preview and beta releases


### Choose stable main to receive updates for TeamViewer 14 and upcoming major releases
### Choose preview main to receive early updates for TeamViewer 14 and to receive major beta releases

### Choose stable tv14 to receive updates for TeamViewer 14
### Choose preview tv14 to receive early updates for TeamViewer 14

deb http://linux.teamviewer.com/deb stable main
# deb http://linux.teamviewer.com/deb preview main

# deb http://linux.teamviewer.com/deb stable tv14
# deb http://linux.teamviewer.com/deb preview tv14
deb http://linux.teamviewer.com/deb stable main


As you can see, The line "deb http://linux.teamviewer.com/deb stable main" is repeated. As long as you delete this line, sudo apt update should not report this error again.

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