boot空间不足

1，查看当前的内核信息

uname -a 
Linux liudong 3.13.0-39-generic #66-Ubuntu SMP Tue Oct 28 13:30:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

2, 查看系统中已安装的内核列表

dpkg --get-selections|grep linux-image
linux-image-3.13.0-24-generic            deinstall
linux-image-3.13.0-32-generic            deinstall
linux-image-3.13.0-35-generic            deinstall
linux-image-3.13.0-36-generic            deinstall
linux-image-3.13.0-37-generic            install
linux-image-3.13.0-39-generic            install
linux-image-extra-3.13.0-24-generic        deinstall
linux-image-extra-3.13.0-32-generic        deinstall
linux-image-extra-3.13.0-35-generic        deinstall
linux-image-extra-3.13.0-36-generic        deinstall
linux-image-extra-3.13.0-37-generic        install
linux-image-extra-3.13.0-39-generic        install
linux-image-generic                install

3，更新grub

sudo update-grub