If I do
aptitude update
while my proxy is down (or when I'm offline), the previous package lists
are apparently gone, so after that, any aptitude command will tell me
things like:
# aptitude install foo
E: The value 'testing' is invalid for APT::Default-Release as such a release
is not available in the sources
E: The value 'testing' is invalid for APT::Default-Release as such a release
is not available in the sources
#
Of course, the obvious answer would be "don't do that", but the "update"
is also done automatically by unattended-updates, so I don't have complete
control over it.
Why does it do that? How can I prevent it?
Stefan
