/boot is 100% full ubuntu
系统的/boot分区满了
apt-get -f install 和 sudo apt-get remove linux-image-VERSION
命令均不起作用,在这里https://askubuntu.com/questions/345588/what-is-the-safest-way-to-clean-up-boot-partition的第二篇解答NOTE: this is only if you can't use apt to clean up due to a 100% full /boot起作用了