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已删除的 Linux 内核仍显示在 GRUB 中

tag-icon • tag-icon boot grub2 kernel
已删除的 Linux 内核仍显示在 GRUB 中

我删除了几个弃用的 3.16 内核，但其中一个仍显示在 GRUB 中，Ubuntu 正在使用该内核启动。当我运行时，dpkg -l | grep linux-image-3.16.0-51-generic映像未列出。当我运行时，sudo update-grub它会找到内核/boot并将其添加到要运行的内核列表中。

我可以删除这个文件吗？如何删除这个内核，以便 Ubuntu 在 3.13 下运行？

ls /boot截屏：

/boot 命令

dpkg -l | grep截图：

dpkg-l 命令

答案1

是的，您可以删除 grub 中列出的文件，但不能使用 dpkg 从 /boot 文件夹中删除。

列出内核：

dpkg -l | grep linux-image

使用以下命令删除未使用的内核：

sudo apt remove linux-image-123-generic --verbose-versions

如果任何内核仍然列在蛴螬- 但不包括软件包，然后你可以从 /boot 库中删除它们（如果你喜欢开车时系安全带，请将它们放在临时文件夹中）。然后重新生成 grub 条目

sudo update-grub

答案2

使用sudo purge-old-kernels（从byobu包中）删除它们，而不是手动删除。
然后执行sudo apt-get autoremove以删除过时的包（标题和图像）。

请注意，您可以将此脚本保存在任何地方并以 root 身份运行：

$ cat `which purge-old-kernels`

#!/bin/sh
#
#    purge-old-kernels - remove old kernel packages
#    Copyright (C) 2012 Dustin Kirkland <[email protected]>
#
#    Authors: Dustin Kirkland <[email protected]>
#             Kees Cook <[email protected]>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, version 3 of the License.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Ensure we're running as root
if [ "$(id -u)" != 0 ]; then
    echo "ERROR: This script must run as root.  Hint..." 1>&2
    echo "  sudo $0 $@" 1>&2
    exit 1
fi

# NOTE: This script will ALWAYS keep the currently running kernel
# NOTE: Default is to keep 2 more, user overrides with --keep N
KEEP=2
# NOTE: Any unrecognized option will be passed straight through to apt
APT_OPTS=
while [ ! -z "$1" ]; do
    case "$1" in
        --keep)
            # User specified the number of kernels to keep
            KEEP="$2"
            shift 2
        ;;
        *)
            APT_OPTS="$APT_OPTS $1"
            shift 1
        ;;
    esac
done

# Build our list of kernel packages to purge
CANDIDATES=$(ls -tr /boot/vmlinuz-* | head -n -${KEEP} | grep -v "$(uname -r)$" | cut -d- -f2- | awk '{print "linux-image-" $0 " linux-headers-" $0}' )
for c in $CANDIDATES; do
    dpkg-query -s "$c" >/dev/null 2>&1 && PURGE="$PURGE $c"
done

if [ -z "$PURGE" ]; then
    echo "No kernels are eligible for removal"
    exit 0
fi

apt $APT_OPTS remove --purge $PURGE

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