我从 16.04 升级到了 18.04，因此没有进行全新安装。从那时起，我就遇到了这个错误（2 个月以来）：
每当我在 Grub 中选择 Ubuntu 和 Windows 后启动 Ubuntu 18.04 时，我都会收到以下消息：
未找到符号表。
按任意键继续...
它会在那里停留一分钟左右，然后才向我显示登录屏幕。
我的 fdisk -l 输出：
Disk /dev/sda: 117,4 GiB, 126035288064 bytes, 246162672 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xe292a906
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT
/dev/sda2 206848 246159359 245952512 117,3G 7 HPFS/NTFS/exFAT
Disk /dev/sdb: 931,5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x831db74e
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 1953521663 1953519616 931,5G 7 HPFS/NTFS/exFAT
Disk /dev/sdc: 111,8 GiB, 120034123776 bytes, 234441648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000c542e
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 7999487 7997440 3,8G 82 Linux swap / Solaris
/dev/sdc2 * 7999488 234440703 226441216 108G 83 Linux
我的启动信息脚本输出：
Boot Info Script 0.77 [10 June 2018]
============================= Boot Info Summary: ===============================
=> Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for /boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_msdos biosdisk search_fs_uuid
---------------------------------------------------------------------------
config script
---------------------------------------------------------------------------
search.fs_uuid da468979-67c2-44b5-8886-d868ed3be27c root hd2,msdos2
set prefix=($root)'/boot/grub'
---------------------------------------------------------------------------
=> No boot loader is installed in the MBR of /dev/sdb.
=> Grub2 (v2.00) is installed in the MBR of /dev/sdc and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos2)/boot/grub. It also embeds following components:
modules
---------------------------------------------------------------------------
fshelp ext2 part_msdos biosdisk
---------------------------------------------------------------------------
sda1: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 8/2012: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /bootmgr /Boot/BCD
sda2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 7/2008: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /Windows/System32/winload.exe
sdb1: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows 7/2008: NTFS
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:
sdc1: __________________________________________________________________________
File system: swap
Boot sector type: -
Boot sector info:
sdc2: __________________________________________________________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 18.04.1 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab
/boot/grub/i386-pc/core.img
============================ Drive/Partition Info: =============================
Drive: sda _____________________________________________________________________
Disk /dev/sda: 117,4 GiB, 126035288064 bytes, 246162672 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sda1 * 2,048 206,847 204,800 7 NTFS / exFAT / HPFS
/dev/sda2 206,848 246,159,359 245,952,512 7 NTFS / exFAT / HPFS
Drive: sdb _____________________________________________________________________
Disk /dev/sdb: 931,5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sdb1 2,048 1,953,521,663 1,953,519,616 7 NTFS / exFAT / HPFS
GUID Partition Table detected, but does not seem to be used.
Partition Attrs Start Sector End Sector # of Sectors System
Attributes: R=Required, N=No Block IO, B=Legacy BIOS Bootable, +=More bits set
Drive: sdc _____________________________________________________________________
Disk /dev/sdc: 111,8 GiB, 120034123776 bytes, 234441648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sdc1 2,048 7,999,487 7,997,440 82 Linux swap / Solaris
/dev/sdc2 * 7,999,488 234,440,703 226,441,216 83 Linux
"blkid" output: ________________________________________________________________
Device UUID TYPE LABEL
/dev/sda1 E69E77A29E7769C7 ntfs
/dev/sda2 3A9C7CF09C7CA851 ntfs
/dev/sdb1 281E7EAF1E7E7622 ntfs
/dev/sdc1 73457ed5-f63e-49fd-a88d-2deec222ae25 swap
/dev/sdc2 da468979-67c2-44b5-8886-d868ed3be27c ext4
========================= "ls -l /dev/disk/by-id" output: ======================
total 0
lrwxrwxrwx 1 root root 9 Dez 17 12:43 ata-SanDisk_SDSSDA120G_160265401375 -> ../../sdc
lrwxrwxrwx 1 root root 10 Dez 17 12:43 ata-SanDisk_SDSSDA120G_160265401375-part1 -> ../../sdc1
lrwxrwxrwx 1 root root 10 Dez 17 12:43 ata-SanDisk_SDSSDA120G_160265401375-part2 -> ../../sdc2
lrwxrwxrwx 1 root root 9 Dez 17 10:42 ata-SanDisk_SDSSDP128G_151524402987 -> ../../sda
lrwxrwxrwx 1 root root 10 Dez 17 10:42 ata-SanDisk_SDSSDP128G_151524402987-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Dez 17 10:42 ata-SanDisk_SDSSDP128G_151524402987-part2 -> ../../sda2
lrwxrwxrwx 1 root root 9 Dez 17 10:42 ata-WDC_WD10EZEX-00BN5A0_WD-WCC3F2JFZ2HP -> ../../sdb
lrwxrwxrwx 1 root root 10 Dez 17 10:42 ata-WDC_WD10EZEX-00BN5A0_WD-WCC3F2JFZ2HP-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 9 Dez 17 10:42 wwn-0x50014ee2611dedb8 -> ../../sdb
lrwxrwxrwx 1 root root 10 Dez 17 10:42 wwn-0x50014ee2611dedb8-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 9 Dez 17 12:43 wwn-0x5001b444a44845f4 -> ../../sdc
lrwxrwxrwx 1 root root 10 Dez 17 12:43 wwn-0x5001b444a44845f4-part1 -> ../../sdc1
lrwxrwxrwx 1 root root 10 Dez 17 12:43 wwn-0x5001b444a44845f4-part2 -> ../../sdc2
lrwxrwxrwx 1 root root 9 Dez 17 10:42 wwn-0x5001b44e5323e32b -> ../../sda
lrwxrwxrwx 1 root root 10 Dez 17 10:42 wwn-0x5001b44e5323e32b-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Dez 17 10:42 wwn-0x5001b44e5323e32b-part2 -> ../../sda2
================================ Mount points: =================================
Device Mount_Point Type Options
/dev/sdb1 /home/philipp/media fuseblk (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096,x-gvfs-show)
/dev/sdc2 / ext4 (rw,relatime,errors=remount-ro,data=ordered)
=========================== sdc2/boot/grub/grub.cfg: ===========================
--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=10
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=10
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30,0; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux_proxy ###
function gfxmode {
set gfxpayload="${1}"
if [ "${1}" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ "${recordfail}" != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
### END /etc/grub.d/10_linux_proxy ###
### BEGIN /etc/grub.d/30_os-prober_proxy ###
menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os $menuentry_id_option 'osprober-chain-E69E77A29E7769C7' {
insmod part_msdos
insmod ntfs
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 E69E77A29E7769C7
else
search --no-floppy --fs-uuid --set=root E69E77A29E7769C7
fi
parttool ${root} hidden-
chainloader +1
}
### END /etc/grub.d/30_os-prober_proxy ###
### BEGIN /etc/grub.d/31_linux_proxy ###
submenu "Advanced options for Ubuntu"{
menuentry "Ubuntu, with Linux 3.19.0-61-generic" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-61-generic-advanced-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 3.19.0-61-generic ...'
linux /boot/vmlinuz-3.19.0-61-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.19.0-61-generic
}
menuentry "Ubuntu, with Linux 3.19.0-61-generic (recovery mode)" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.19.0-61-generic-recovery-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 3.19.0-61-generic ...'
linux /boot/vmlinuz-3.19.0-61-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.19.0-61-generic
}
}
### END /etc/grub.d/31_linux_proxy ###
### BEGIN /etc/grub.d/32_linux_xen ###
### END /etc/grub.d/32_linux_xen ###
### BEGIN /etc/grub.d/33_memtest86+_proxy ###
### END /etc/grub.d/33_memtest86+_proxy ###
### BEGIN /etc/grub.d/34_os-prober_proxy ###
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
set timeout=10
fi
### END /etc/grub.d/34_os-prober_proxy ###
### BEGIN /etc/grub.d/35_memtest86+_proxy ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
knetbsd /boot/memtest86+.elf
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/35_memtest86+_proxy ###
### BEGIN /etc/grub.d/36_linux_proxy ###
menuentry "Ubuntu" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
linux /boot/vmlinuz-4.15.0-42-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro quiet splash $vt_handoff
initrd /boot/initrd.img-4.15.0-42-generic
}
menuentry "Ubuntu, with Linux 4.15.0-42-generic" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-42-generic-advanced-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 4.15.0-42-generic ...'
linux /boot/vmlinuz-4.15.0-42-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-4.15.0-42-generic
}
menuentry "Ubuntu, with Linux 4.15.0-42-generic (recovery mode)" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-42-generic-recovery-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 4.15.0-42-generic ...'
linux /boot/vmlinuz-4.15.0-42-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-4.15.0-42-generic
}
menuentry "Ubuntu, with Linux 4.15.0-39-generic" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-39-generic-advanced-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 4.15.0-39-generic ...'
linux /boot/vmlinuz-4.15.0-39-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-4.15.0-39-generic
}
menuentry "Ubuntu, with Linux 4.15.0-39-generic (recovery mode)" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-39-generic-recovery-da468979-67c2-44b5-8886-d868ed3be27c' {
recordfail
load_video
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 da468979-67c2-44b5-8886-d868ed3be27c
else
search --no-floppy --fs-uuid --set=root da468979-67c2-44b5-8886-d868ed3be27c
fi
echo 'Loading Linux 4.15.0-39-generic ...'
linux /boot/vmlinuz-4.15.0-39-generic root=UUID=da468979-67c2-44b5-8886-d868ed3be27c ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-4.15.0-39-generic
}
### END /etc/grub.d/36_linux_proxy ###
### BEGIN /etc/grub.d/37_uefi-firmware ###
### END /etc/grub.d/37_uefi-firmware ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------
=============================== sdc2/etc/fstab: ================================
--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdc2 during installation
UUID=da468979-67c2-44b5-8886-d868ed3be27c / ext4 errors=remount-ro 0 1
# swap was on /dev/sdc1 during installation
UUID=73457ed5-f63e-49fd-a88d-2deec222ae25 none swap sw 0 0
/dev/disk/by-uuid/281E7EAF1E7E7622 /home/philipp/media auto nosuid,nodev,nofail,x-gvfs-show,x-gvfs-name=WindowsFestplatte 0 0
--------------------------------------------------------------------------------
=================== sdc2: Location of files loaded by Grub: ====================
GiB - GB File Fragment(s)
91,136955261 = 97,857560576 boot/grub/grub.cfg 2
84,258537292 = 90,471915520 boot/grub/i386-pc/core.img 1
9,043247223 = 9,710112768 boot/vmlinuz-3.19.0-61-generic 1
15,263565063 = 16,389128192 boot/vmlinuz-4.15.0-39-generic 2
94,337783813 = 101,294424064 boot/vmlinuz-4.15.0-42-generic 2
94,337783813 = 101,294424064 vmlinuz 2
15,263565063 = 16,389128192 vmlinuz.old 2
78,837886810 = 84,651536384 boot/initrd.img-3.19.0-61-generic 5
45,283199310 = 48,622465024 boot/initrd.img-4.15.0-39-generic 10
99,574939728 = 106,917777408 boot/initrd.img-4.15.0-42-generic 117
99,574939728 = 106,917777408 initrd.img 117
45,283199310 = 48,622465024 initrd.img.old 10
所以我的 Windows 7 位于一个 SSD 中 (sda)。我的 Ubuntu 位于一个 SSD 中 (sdc)。我还有一个 HDD (sdb)。
我尝试过的解决方案：没有符号表。按任意键继续
我做到了：
sudo grub-install /dev/sdc
sudo update-grub
sudo reboot
但什么都没变。我选择是sdc因为我的 Ubuntu 已经安装了，对吗？
答案1
从你的启动信息中：
Grub2 (v2.00) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for /boot/grub. It also embeds following components:
因此正确的命令应该是：
sudo grub-install /dev/sda
sudo update-grub
sudo reboot
然而，他们不会帮助你，因为你受到这个错误 因此请订阅该列表并查看何时修复，然后执行以下操作：
sudo apt update
sudo apt dist-upgrade
它会自行消失。