root@terra:/# apt-cache search linux-image | grep --invert --ignore-case Obsolete
alsa-base - ALSA driver configuration files
linux-image-2.6.17-10-generic - Linux kernel image for version 2.6.17 on x86/x86_64
linux-image-2.6.17-10-server - Linux kernel image for version 2.6.17 on x86/x86_64
linux-image-2.6.20-5-generic - Linux kernel image for version 2.6.20 on x86/x86_64
linux-image-2.6.20-5-server - Linux kernel image for version 2.6.20 on x86/x86_64
linux-image-debug-2.6.17-10-generic - Linux kernel debug image for version 2.6.17 on x86/x86_64
linux-image-debug-2.6.17-10-server - Linux kernel debug image for version 2.6.17 on x86/x86_64
linux-image-debug-2.6.20-5-generic - Linux kernel debug image for version 2.6.20 on x86/x86_64
linux-image-debug-2.6.20-5-lowlatency - Linux kernel debug image for version 2.6.20 on x86/x86_64
linux-image-debug-2.6.20-5-server - Linux kernel debug image for version 2.6.20 on x86/x86_64
linux-image-generic - Generic Linux kernel image
linux-image-server - Linux kernel image on Server Equipment.