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I'm using Ubuntu 15.04. I was not able to update so I followed the instructions from this Ask Ubuntu answer. Now I'm getting these error messages when I run sudo apt-get update:

E: Type '<!DOCTYPE' is not known on line 1 in source list sud/etc/apt/sources.list 
E: The list of sources could not be read.

How can I fix this?

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G S Srivatsa
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  • where is the error message? – Ravan Oct 19 '15 at 08:52
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    Please [edit] your question and show us the contents of your /etc/apt/sources.list file. You seem to have made it into an HTML document somehow. – terdon Oct 19 '15 at 08:56
  • Also, it is /etc/apt/sources.list not sud/etc/apt/sources.list the sud part should not be there? – blade19899 Oct 19 '15 at 09:25
  • @blade19899 that "sud" probably should have been either "sudo" or "sed" and got included into the command used. Either way ... that file is messed up probably. – Rinzwind Oct 19 '15 at 09:50

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Looks like your sources file is corrupted. Remove the corrupted source file by pressing Ctrl+Alt+T to open a terminal, and type in 

sudo rm /etc/apt/sources.list

Then, type in sudo software-properties-gtk. This will open software-properties-gtk and a new sources.list will be created automatically.

Then change the server to US or to any other server of your choice. You must enable repositories from the new dialog in order to create new sources.list.

How do I restore the default repositories?

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Neil
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