You are running a kernel (version 2.6.38-powerpc64) and attempting to remove the same version. This is a potentially disastrous action. Not only will /boot/vmlinuz-2.6.38-powerpc64 be removed, making it impossible to boot it, (you will have to take action to change your boot loader to boot a new kernel), it will also remove all modules under the directory /lib/modules/2.6.38-powerpc64. Just having a copy of the kernel image is not enough, you will have to replace the modules too.
I repeat, this is very dangerous. If at all in doubt, answer Yes. If you know exactly what you are doing, and are prepared to hose your system, then answer No.
Do you want to abort removal now?
You must answer NO.
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Below are the changes, to quote: Red Ribbon Release Candidate 6 is based on Debian Wheezy and it includes the following changes:
Kernel 3.5.2 with the Graf_chokolo's, Marcan's and Gitbrew's patches.
New version of the installer with some features added and some bugs fixed.
The installer now supports the portuguese language.
Added a notification alert when the disk space is lower than 100 MB.
Kboot-setup now supports a config file.
New version of the Red Ribbon theme.
Added Gnome Users-admin as the user administration tool.
Iceweasel (Firefox) updated to the 14 release.
Added Gnome Time-admin as the date and time administration tool.
Added the kernel headers and the build tools.