Ubuntu boot空间提示不足

当boot提示空间不足时，一般是因为ubuntu自动更新了内核导致，解决方法就是删除旧的不用的内核

df -l 查看磁盘状态

文件系统          1K-块     已用    可用 已用% 挂载点
udev            3935352        0 3935352    0% /dev
tmpfs            793124     9680  783444    2% /run
/dev/sda7      39752296 32944260 4765668   88% /
tmpfs           3965604      352 3965252    1% /dev/shm
tmpfs              5120        4    5116    1% /run/lock
tmpfs           3965604        0 3965604    0% /sys/fs/cgroup
/dev/sda5        184307   112584   58104   66% /boot
/dev/sda2        101589    19418   82171   20% /boot/efi
tmpfs            793124       68  793056    1% /run/user/1000

uname -a 查看当前使用的内核是4.10.35

Linux guolin-ThinkPad-T470 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

dpkg --get-selections|grep linux

console-setup-linux             install
libselinux1:amd64               install
linux-base                  install
linux-firmware                  install
linux-generic-hwe-16.04             install
linux-headers-4.10.0-28             install
linux-headers-4.10.0-28-generic         install
linux-headers-4.10.0-35             install
linux-headers-4.10.0-35-generic         install
linux-headers-generic-hwe-16.04         install
linux-image-4.10.0-35-generic           install
linux-image-extra-4.10.0-28-generic     deinstall
linux-image-extra-4.10.0-35-generic     install
linux-image-generic-hwe-16.04           install
linux-libc-dev:amd64                install
linux-signed-image-4.10.0-28-generic        deinstall
linux-signed-image-4.10.0-35-generic        install
linux-sound-base                install
pptp-linux                  install
syslinux                    install
syslinux-common                 install
syslinux-legacy                 install
util-linux                  install

sudo apt-get remove linux-image4.10.0-28-generic

过程中可能会出错，这时再运行

sudo apt-get autoremove

最后的效果，

/dev/sda5        184307   112584   58104   66% /boot