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一定有什么东西紊乱了，而且和dpkg有关。不知道是什么引起的。以下是症状：
命令sudo apt upgrade、sudo apt install <any package>、sudo apt remove <any package>和sudo apt install -f均失败，并显示以下错误：

Setting up dpkg (1.21.1ubuntu2.1) ...
head: error reading 'info.bak': Is a directory
dpkg: error processing package dpkg (--configure):
 installed dpkg package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 dpkg

sudo apt update运行正常。
下面是sudo dpkg --configure -a的输出，尽管我不知道如何从技术上理解它的含义：

Setting up dpkg (1.21.1ubuntu2.1) ...
head: error reading 'info.bak': Is a directory
dpkg: error processing package dpkg (--configure):
 installed dpkg package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of libdpkg-perl:
 libdpkg-perl depends on dpkg (>= 1.18.11); however:
  Package dpkg is not configured yet.

dpkg: error processing package libdpkg-perl (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of dpkg-dev:
 dpkg-dev depends on libdpkg-perl (= 1.21.1ubuntu2); however:
  Package libdpkg-perl is not configured yet.

dpkg: error processing package dpkg-dev (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of pkg-config:
 pkg-config depends on libdpkg-perl; however:
  Package libdpkg-perl is not configured yet.

dpkg: error processing package pkg-config (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libglib2.0-dev:amd64:
 libglib2.0-dev:amd64 depends on pkg-config; however:
  Package pkg-config is not configured yet.

dpkg: error processing package libglib2.0-dev:amd64 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libdbus-1-dev:amd64:
 libdbus-1-dev:amd64 depends on pkg-config; however:
  Package pkg-config is not configured yet.

dpkg: error processing package libdbus-1-dev:amd64 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent processing triggers for install-info:
 install-info depends on dpkg (>= 1.16.1); however:
  Package dpkg is not configured yet.

dpkg: error processing package install-info (--configure):
 dependency problems - leaving triggers unprocessed
dpkg: dependency problems prevent processing triggers for sgml-base:
 sgml-base depends on dpkg (>= 1.16.4); however:
  Package dpkg is not configured yet.

dpkg: error processing package sgml-base (--configure):
 dependency problems - leaving triggers unprocessed
Errors were encountered while processing:
 dpkg
 libdpkg-perl
 dpkg-dev
 pkg-config
 libglib2.0-dev:amd64
 libdbus-1-dev:amd64
 install-info
 sgml-base

我看到另一个关于类似主题的帖子，其中提到stat / /dev /var的输出可能有用（尽管我不确定它有什么用）。

File: /
  Size: 4096        Blocks: 8          IO Block: 4096   directory
Device: 801h/2049d  Inode: 2           Links: 20
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2022-06-11 12:23:55.966935477 +1000
Modify: 2022-03-28 17:02:40.336120240 +1100
Change: 2022-06-11 12:15:41.459498623 +1000
 Birth: 2020-12-31 15:04:54.000000000 +1100
  File: /dev
  Size: 4720        Blocks: 0          IO Block: 4096   directory
Device: 5h/5d   Inode: 1           Links: 21
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2022-06-11 11:59:38.006513248 +1000
Modify: 2022-06-11 11:59:17.901323228 +1000
Change: 2022-06-11 11:59:17.901323228 +1000
 Birth: -
  File: /var
  Size: 4096        Blocks: 8          IO Block: 4096   directory
Device: 801h/2049d  Inode: 5767169     Links: 15
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2022-04-28 09:42:56.569785898 +1000
Modify: 2021-08-18 10:28:44.011762167 +1000
Change: 2021-08-18 10:28:44.011762167 +1000
 Birth: 2020-12-31 15:04:58.512613837 +1100

运行sudo chown root /没有任何区别。

• • 我的系统：**

./+o+-       mblizzard@HP248G1
                  yyyyy- -yyyyyy+      OS: Ubuntu 22.04 jammy
               ://+//////-yyyyyyo      Kernel: x86_64 Linux 5.15.0-23-generic
           .++ .:/++++++/-.+sss/`      Uptime: 1h 5m
         .:++o:  /++++++++/:--:/-      Packages: 4191
        o:+o+:++.`..```.-/oo+++++/     Shell: bash 5.1.16
       .:+o:+o/.          `+sssoo+/    Resolution: 2646x1024
  .++/+:+oo+o:`             /sssooo.   DE: Xfce
 /+++//+:`oo+o               /::--:.   WM: Xfwm4
 \+/+o+++`o++o               ++////.   WM Theme: Sweet-Ambar
  .++.o+++oo+:`             /dddhhh.   GTK Theme: Sweet-Dark [GTK2]
       .+.o+oo:.          `oddhhhh+    Icon Theme: TheOne
        \+.++o+o``-````.:ohdhhhhh+     Font: Noto Sans 10
         `:o+++ `ohhhhhhhhyo++os:      Disk: 791G / 916G (91%)
           .o:`.syhhhhhhh/.oo++o`      CPU: Intel Core i5-4200U @ 4x 2.6GHz [40.0°C]
               /osyyyyyyo++ooo+++/     GPU: Mesa Intel(R) HD Graphics 4400 (HSW GT2)
                   ````` +oo+++o\:     RAM: 4823MiB / 7871MiB
                          `oo++.

先谢了!