I am using ubuntu 10.10, here i am not able install any paint tool. If i try to install some tool, it will show below message in a dialog box.
Requires installation of untrusted packages The action would require the installation of packages from not authenticated sources.
Please suggest some paint tool along with installation steps.
Also i have tried $ sudo apt-get update but it is showing like below
Err http://in.archive.ubuntu.com maverick-updates/multiverse i386 Packages 404 Not Found [IP: 18.104.22.168 80]
Fetched 198B in 22s (9B/s)
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found