'Unresolvable' problem while initializing package information

[eduardo saxel]

After that it says: "Please report this bug against the 'update-manager' package and include the following error message:


'E:Type '123456' is not known on line 54 in source list /etc/apt/sources.list, E:The list of sources could not be read.'"

[dFlyer]

What package were you trying to install?

[eduardo saxel]

None. It was an automatic update Ubuntu does almost every day.But now that you mention it, the problem started when I tried to install Geogebra:

http://www.geogebra.org/en/wiki/index.php/Package_for_Ubuntu_and_Debian

after that:

Ubuntu 10.04 and earlier

Open Applications > Accessories > Terminal and paste following commands into it (confirm by enter):

echo "deb http://kondr.ic.cz/deb lucid main" | sudo tee -a /etc/apt/sources.list
wget http://kondr.ic.cz/kondr.key -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install geogebra


And I did so... without being sure of what Ubuntu version I have.

[plucky]

And I did so... without being sure of what Ubuntu version I have.

From a terminal
lsb_release -a should tell you which version you have.


'E:Type '123456' is not known on line 54 in source list /etc/apt/sources.list, E:The list of sources could not be read.'"


Post output of
cat /etc/apt/sources.list