Ubuntu删除老的内核文件

总的步骤

• 查询当前内核版本: uname -a
• 列出所有内核: dpkg –get-selections | grep linux-image
• 删除老的内核: sudo apt-get remove linux-image-xxxx

Example

flying-bird@flyingbird:~$ dpkg --get-selections | grep linux-imagelinux-image-3.13.0-33-generic           deinstalllinux-image-3.13.0-34-generic           deinstalllinux-image-3.13.0-35-generic           deinstalllinux-image-3.13.0-36-generic           deinstalllinux-image-3.13.0-37-generic           deinstalllinux-image-3.13.0-39-generic           deinstalllinux-image-3.13.0-40-generic           deinstalllinux-image-3.13.0-43-generic           deinstalllinux-image-3.13.0-44-generic           deinstalllinux-image-3.13.0-46-generic           deinstalllinux-image-3.13.0-48-generic           deinstalllinux-image-3.13.0-49-generic           deinstalllinux-image-3.13.0-53-generic           deinstalllinux-image-3.13.0-55-generic           deinstalllinux-image-3.13.0-57-generic           deinstalllinux-image-3.13.0-58-generic           deinstalllinux-image-3.13.0-85-generic           deinstalllinux-image-3.13.0-86-generic           deinstalllinux-image-3.13.0-87-generic           deinstalllinux-image-3.13.0-93-generic           installlinux-image-3.2.0-24-generic-pae        deinstalllinux-image-3.2.0-67-generic-pae        installlinux-image-4.4.0-34-generic            deinstalllinux-image-extra-3.13.0-33-generic     deinstalllinux-image-extra-3.13.0-34-generic     deinstalllinux-image-extra-3.13.0-35-generic     deinstalllinux-image-extra-3.13.0-36-generic     deinstalllinux-image-extra-3.13.0-37-generic     deinstalllinux-image-extra-3.13.0-39-generic     deinstalllinux-image-extra-3.13.0-40-generic     deinstalllinux-image-extra-3.13.0-43-generic     deinstalllinux-image-extra-3.13.0-44-generic     deinstalllinux-image-extra-3.13.0-46-generic     deinstalllinux-image-extra-3.13.0-48-generic     deinstalllinux-image-extra-3.13.0-49-generic     deinstalllinux-image-extra-3.13.0-53-generic     deinstalllinux-image-extra-3.13.0-55-generic     deinstalllinux-image-extra-3.13.0-57-generic     deinstalllinux-image-extra-3.13.0-58-generic     deinstalllinux-image-extra-3.13.0-85-generic     deinstalllinux-image-extra-3.13.0-86-generic     deinstalllinux-image-extra-3.13.0-87-generic     deinstalllinux-image-extra-3.13.0-93-generic     installlinux-image-extra-4.4.0-34-generic      deinstallflying-bird@flyingbird:~$ uname -aLinux flyingbird 3.13.0-93-generic #140-Ubuntu SMP Mon Jul 18 21:20:08 UTC 2016 i686 i686 i686 GNU/Linuxflying-bird@flyingbird:~$ sudo apt-get remove linux-image-3.2.0-67-generic-pae [sudo] password for flying-bird: Reading package lists... DoneBuilding dependency tree       Reading state information... DoneThe following packages were automatically installed and are no longer required:  account-plugin-identica account-plugin-twitter fcitx-libs-gclient gir1.2-ebook-1.2 gir1.2-ebookcontacts-1.2 gir1.2-edataserver-1.2  gir1.2-messagingmenu-1.0 gir1.2-networkmanager-1.0 libllvm3.8 libmircommon5 snap-confine ubuntu-core-launcherUse 'sudo apt autoremove' to remove them.The following packages will be REMOVED:  linux-image-3.2.0-67-generic-pae0 upgraded, 0 newly installed, 1 to remove and 3 not upgraded.After this operation, 114 MB disk space will be freed.Do you want to continue? [Y/n] y(Reading database ... 320329 files and directories currently installed.)Removing linux-image-3.2.0-67-generic-pae (3.2.0-67.101) ...Examining /etc/kernel/postrm.d .run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.2.0-67-generic-pae /boot/vmlinuz-3.2.0-67-generic-paeupdate-initramfs: Deleting /boot/initrd.img-3.2.0-67-generic-paerun-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.2.0-67-generic-pae /boot/vmlinuz-3.2.0-67-generic-paeGenerating grub configuration file ...Found linux image: /boot/vmlinuz-3.13.0-93-genericFound initrd image: /boot/initrd.img-3.13.0-93-genericFound memtest86+ image: /boot/memtest86+.elfFound memtest86+ image: /boot/memtest86+.binFound Ubuntu 12.04 LTS (12.04) on /dev/sda7doneflying-bird@flyingbird:~$ 

这里的12.04 LTS是当初升级Ubuntu时备份的老的操作系统。