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E: Type' ://ppa.launchpad.net/bisigi/ppa/ubuntu' is not known on line 2 in source list/etc/apt/sources.list.d/bisigi-ppa-maverick.list 
E:Unable to lock the list directory

This is blocking me from entering the Synaptic Package Manager! What is going on? Help!

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Remove the ppa and if you want re add it again but make sure you add it correctly. –  Uri Herrera Aug 11 '11 at 3:26

3 Answers 3

It seems like you have a bad sources list configuration.

Using the following command:

gksu gedit /etc/apt/sources.list

allows you to edit the sources list file. Find the line that points to the bisigi PPA and edit it so that it looks exactly as below:

deb http://ppa.launchpad.net/bisigi/ppa/ubuntu natty main 
deb-src http://ppa.launchpad.net/bisigi/ppa/ubuntu natty main 

Save the file and exit.

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Remove the PPA by going to Software Sources and removing it. Then to add it back, just do the following in Terminal.

sudo add-apt-repository ppa:bisigi/ppa
sudo apt-get update
sudo apt-get install bisigi-themes
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1  
I was able to remove the ppa, but the mess is still there, with the same error messages as before. How can I remove the bisigi themes and what I downloaded in the terminal? Will that help to resolved this matter? –  Thomas Farber Aug 11 '11 at 13:13

You would need to remove the repositories from

/etc/apt/sources.list.d

and then remove

bisigi-ppa-oneiric.list
bisigi-ppa-oneiric.list.save
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