有7Gb可用，但...
~ # dpkg --configure -a
Setting up linux-image-2.6.32-31-generic-pae (2.6.32-31.61) ...
Running depmod.
update-initramfs: Generating /boot/initrd.img-2.6.32-31-generic-pae
gzip: stdout: No space left on device
update-initramfs: failed for /boot/initrd.img-2.6.32-31-generic-pae
Failed to create initrd image.
dpkg: error processing linux-image-2.6.32-31-generic-pae (--configure):
subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of linux-image-generic-pae:
linux-image-generic-pae depends on linux-image-2.6.32-31-generic-pae; however:
Package linux-image-2.6.32-31-generic-pae is not configured yet.
dpkg: error processing linux-image-generic-pae (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of linux-generic-pae:
linux-generic-pae depends on linux-image-generic-pae (= 2.6.32.31.37); however:
Package linux-image-generic-pae is not configured yet.
dpkg: error processing linux-generic-pae (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
linux-image-2.6.32-31-generic-pae
linux-image-generic-pae
linux-generic-pae
~ # df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 18577148 10255512 7377972 59% /
none 1026416 164 1026252 1% /dev
none 1030624 0 1030624 0% /dev/shm
none 1030624 100 1030524 1% /var/run
none 1030624 4 1030620 1% /var/lock
none 1030624 0 1030624 0% /lib/init/rw
/dev/sda1 93207 87960 435 100% /boot
~ # cat /etc/redhat-release
cat: /etc/redhat-release: No such file or directory
~ # cat /proc/version
Linux version 2.6.32-30-generic-pae (buildd@vernadsky) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #59-Ubuntu SMP Tue Mar 1 23:01:33 UTC 2011
~ # uname -a
Linux ws1.naturapet.com.au 2.6.32-30-generic-pae #59-Ubuntu SMP Tue Mar 1 23:01:33 UTC 2011 i686 GNU/Linux
~ # lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.2 LTS
Release: 10.04
Codename: lucid
问题是你的/boot 分区是 100% 已满。 新的 Linux 内核将安装在那里，但如果该分区已满，它们显然不能安装。
检查是否安装了旧内核并卸载它们。
dpkg -l | grep linux-image
会告诉你你安装了哪些 Linux 内核。
uname -a
会告诉你你当前正在使用的内核。
因为你在
/boot 上没有剩余的空间