我的/boot分区快满了，每次重新启动系统时都会收到警告。我已经删除了旧的内核包（linux-headers ...），实际上我这样做是为了安装自动更新附带的较新内核版本。
安装新版本后，分区又快满了。那我还能删除什么？是否有其他一些与旧内核映像相关的文件？
这是我的/boot分区上的文件列表：
:~$ ls /boot/
abi-2.6.31-21-generic lost+found
abi-2.6.32-25-generic memtest86+.bin
abi-2.6.38-10-generic memtest86+_multiboot.bin
abi-2.6.38-11-generic System.map-2.6.31-21-generic
abi-2.6.38-12-generic System.map-2.6.32-25-generic
abi-2.6.38-8-generic System.map-2.6.38-10-generic
abi-3.0.0-12-generic System.map-2.6.38-11-generic
abi-3.0.0-13-generic System.map-2.6.38-12-generic
abi-3.0.0-14-generic System.map-2.6.38-8-generic
boot System.map-3.0.0-12-generic
config-2.6.31-21-generic System.map-3.0.0-13-generic
config-2.6.32-25-generic System.map-3.0.0-14-generic
config-2.6.38-10-generic vmcoreinfo-2.6.31-21-generic
config-2.6.38-11-generic vmcoreinfo-2.6.32-25-generic
config-2.6.38-12-generic vmcoreinfo-2.6.38-10-generic
config-2.6.38-8-generic vmcoreinfo-2.6.38-11-generic
config-3.0.0-12-generic vmcoreinfo-2.6.38-12-generic
config-3.0.0-13-generic vmcoreinfo-2.6.38-8-generic
config-3.0.0-14-generic vmcoreinfo-3.0.0-12-generic
extlinux vmcoreinfo-3.0.0-13-generic
grub vmcoreinfo-3.0.0-14-generic
initrd.img-2.6.31-21-generic vmlinuz-2.6.31-21-generic
initrd.img-2.6.32-25-generic vmlinuz-2.6.32-25-generic
initrd.img-2.6.38-10-generic vmlinuz-2.6.38-10-generic
initrd.img-2.6.38-11-generic vmlinuz-2.6.38-11-generic
initrd.img-2.6.38-12-generic vmlinuz-2.6.38-12-generic
initrd.img-2.6.38-8-generic vmlinuz-2.6.38-8-generic
initrd.img-3.0.0-12-generic vmlinuz-3.0.0-12-generic
initrd.img-3.0.0-13-generic vmlinuz-3.0.0-13-generic
initrd.img-3.0.0-14-generic vmlinuz-3.0.0-14-generic
目前，我正在使用3.0.0-14-generic内核。