每当我尝试通过终端安装某些东西时，都会发生以下情况：
Reading package lists... Done
Building dependency tree
Reading state information... Done
wget is already the newest version (1.20.3-1ubuntu1).
wget set to manually installed.
build-essential is already the newest version (12.8ubuntu1.1).
build-essential set to manually installed.
libssl-dev is already the newest version (1.1.1f-1ubuntu2.4).
libssl-dev set to manually installed.
The following package was automatically installed and is no longer required:
linux-modules-5.8.0-49-generic
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
libncurses-dev libnspr4-dev
Suggested packages:
ncurses-doc readline-doc
The following packages will be REMOVED:
linux-image-5.8.0-49-generic
The following NEW packages will be installed:
libffi-dev libgdbm-dev libncurses-dev libncurses5-dev libnspr4-dev libnss3-dev libreadline-dev zlib1g-dev
0 upgraded, 8 newly installed, 1 to remove and 7 not upgraded.
3 not fully installed or removed.
Need to get 1.214 kB of archives.
After this operation, 2.901 kB disk space will be freed.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm-dev amd64 1.18.1-5 [83,4 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal/main amd64 libncurses-dev amd64 6.2-0ubuntu2 [339 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal/main amd64 libncurses5-dev amd64 6.2-0ubuntu2 [976 B]
Get:4 http://archive.ubuntu.com/ubuntu focal/main amd64 libnspr4-dev amd64 2:4.25-1 [206 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libnss3-dev amd64 2:3.49.1-1ubuntu1.5 [231 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 libreadline-dev amd64 8.0-4 [141 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 zlib1g-dev amd64 1:1.2.11.dfsg-2ubuntu1.2 [155 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/main amd64 libffi-dev amd64 3.3-4 [57,0 kB]
Fetched 1.214 kB in 0s (2.750 kB/s)
(Reading database ... 290766 files and directories currently installed.)
Removing linux-image-5.8.0-49-generic (5.8.0-49.55~20.04.1) ...
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-5.8.0-49-generic
/etc/kernel/postrm.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.8.0-49-generic (--remove):
installed linux-image-5.8.0-49-generic package post-removal script subprocess returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
linux-image-5.8.0-49-generic
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
不幸的是，它没有告诉我错误行号，所以我不知道要寻找什么。
这是我的内容/etc/default/grub：
GNU nano 4.8 /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
我不知道这是否有帮助，但以防万一......当我运行时：
sudo nano /etc/grub.d/*
nano 打开并在底部显示以下消息：
[ Directory '/etc/grub.d' does not exist ]
和dpkg -C：
The following packages are only half configured, probably due to problems
configuring them the first time. The configuration should be retried using
dpkg --configure <package> or the configure menu option in dselect:
grub-pc GRand Unified Bootloader, version 2 (PC/BIOS version)
linux-image-5.8.0-53-generic Signed kernel image generic
The following packages are only half installed, due to problems during
installation. The installation can probably be completed by retrying it;
the packages can be removed using dselect or dpkg --remove:
linux-image-5.8.0-49-generic Signed kernel image generic
dpkg --configure按照上述输出建议，运行grub-pc和 的命令，结果如下：linux-image
$ sudo dpkg --configure grub-pc
[sudo] password for reagan:
Setting up grub-pc (2.04-1ubuntu26.11) ...
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
dpkg: error processing package grub-pc (--configure):
installed grub-pc package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
grub-pc
$ sudo dpkg --configure linux-image-5.8.0-53-generic
Setting up linux-image-5.8.0-53-generic (5.8.0-53.60~20.04.1) ...
Processing triggers for linux-image-5.8.0-53-generic (5.8.0-53.60~20.04.1) ...
/etc/kernel/postinst.d/dkms:
* dkms: running auto installation service for kernel 5.8.0-53-generic
...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.8.0-53-generic
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.8.0-53-generic (--configure):
installed linux-image-5.8.0-53-generic package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
linux-image-5.8.0-53-generic
运行时nano /boot/grub/grub.cfg.new：
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
[ File '/boot/grub/grub.cfg.new' is unwritable ]
跑步nano /boot/grub/grub.cfg也是同样的事情，再加上一大串的if...else语句。