Why do I always have to run apt-get update twice? Or do I?

Question

Every time I run apt-get update, I get the following message (the exact duplicate package is different depending on the last entry in sources.list):

W: Duplicate sources.list entry http://ftp.uk.debian.org/debian/ squeeze/main armel Packages 
(/var/lib/apt/lists/ftp.uk.debian.org_debian_dists_squeeze_main_binary-armel_Packages)

If I run apt-get update again, it's fine. What's going on?

Can you please post the output of cat /etc/apt/sources.list and ls /etc/apt/sources.list.d. Thanks. — Jivings, Jun 30 '12 at 21:32
By the way, these warnings are completely benign. You could simply just run update once and ignore the output. — user606723, Jul 02 '12 at 13:03
Not a duplicate. This bug is specific to the RasPi Debian Squeeze image. — finnw, Jul 03 '12 at 07:36

score 12 · Accepted Answer · answered Jul 02 '12 at 08:17

I think there is a bug in the image. /etc/apt/sources.list contains 2 lines that look like this

deb http://ftp.uk.debian.org/debian/ squeeze main
deb http://ftp.uk.debian.org/debian/ squeeze main non-free

To solve your problem, delete the first one.

Whilst the lines aren't exact duplicate, they do specify duplicate repositories.

Why do I always have to run apt-get update twice? Or do I?

1 Answers1