Ubuntu更新時遇到/boot空間不足

常常升級Linux內核，致使更新時警告/boot分區空間不足。這是覺得屢次升級內核後，致使內核版本太多，清理一下沒用的內核文件就好了。

dpkg -l 'linux-image-*' | grep '^ii'
或
dpkg --get-selections |grep linux-image

ii  linux-image-4.4.0-21-generic       4.4.0-21.37  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-22-generic       4.4.0-22.40  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-23-generic       4.4.0-23.41  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-21-generic 4.4.0-21.37  amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-22-generic 4.4.0-22.40  amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-22-generic            install
linux-image-4.4.0-23-generic            install
linux-image-extra-4.4.0-22-generic        install
linux-image-extra-4.4.0-23-generic        install
linux-image-generic                install

還能夠查看

ls /boot

abi-4.4.0-22-generic     grub                         System.map-4.4.0-22-generic
abi-4.4.0-23-generic     initrd.img-4.4.0-22-generic  System.map-4.4.0-23-generic
config-4.4.0-22-generic  initrd.img-4.4.0-23-generic  vmlinuz-4.4.0-22-generic
config-4.4.0-23-generic  lost+found                   vmlinuz-4.4.0-23-generic

查看當前啓動的內核

uname -a

Linux gen8 4.4.0-23-generic #41-Ubuntu SMP Mon May 16 23:04:25 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

刪除舊內核

sudo apt purge linux-image-4.4.0-21-generic

Do you want to continue? [Y/n] y

這時空間足夠了應該自動一便更新了內核

 

清楚下剩餘的，會刪除linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic這兩個

sudo apt autoremove

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
After this operation, 77.5 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 125503 files and directories currently installed.)
Removing linux-headers-4.4.0-21-generic (4.4.0-21.37) ...

參考：http://blog.csdn.net/zht666/article/details/8776316