ubuntu使用指南：清理/boot 删除旧内核

查看当前内核版本

uname -a

查看当前系统安装的内核版本

dpkg --get-selections|grep linux
[Result]
libselinux1:amd64                install
linux-firmware                    install
linux-generic                    install
linux-headers-3.13.0-46                install
linux-headers-3.13.0-46-generic            install
linux-headers-generic                install
linux-image-3.13.0-46-generic            install
linux-image-extra-3.13.0-44-generic        deinstall
linux-image-extra-3.13.0-46-generic        install
linux-image-generic                install
linux-libc-dev:amd64                install
linux-signed-generic                install
linux-signed-image-3.13.0-44-generic        deinstall
linux-signed-image-3.13.0-46-generic        install
linux-signed-image-generic            install
linux-sound-base                install
pptp-linux                    install
syslinux                    install
syslinux-common                    install
syslinux-legacy                    install
util-linux                    install

其中linux-headers、linux-image、linux-signed开头的都是跟内核相关的.带有版本号的(如linux-image-extra-3.13.0-44-generic)才是可以删除的.注意不要删除当前使用的版本.后面的install表示已安装,deinstall表示曾经安装过,现在已被删除(已不占空间).

删除旧内核

sudo apt-get purge '旧内核'

更新启动菜单

sudo update-grub