[原创] 解决Ubuntu 无法用 apt-get install 安装任何软件(dpkg: error processing package xxx)的问题

Ubuntu不知道什么原因，不能用 apt-get install 安装任何软件了，并且在屏幕上输出海量错误信息，非常迷惑人，例如下面这一例：

insserv: Starting vpnagentd_init depends on plymouth and therefore on system facility `$all' which can not be true!

insserv: There is a loop between service vpnagentd_init and mountkernfs if started

insserv:  loop involving service mountkernfs at depth 1

insserv: Starting vpnagentd_init depends on plymouth and therefore on system facility `$all' which can not be true!

......
insserv: Starting vpnagentd_init depends on plymouth and therefore on system facility `$all' which can not be true!

insserv: There is a loop between service vpnagentd_init and dns-clean if started

insserv:  loop involving service dns-clean at depth 1

......
insserv: Starting vpnagentd_init depends on plymouth and therefore on system facility `$all' which can not be true!

insserv: exiting now without changing boot order!

update-rc.d: error: insserv rejected the script header

dpkg: error processing package binfmt-support (--configure):

 subprocess installed post-installation script returned error exit status 1

No apport report written because MaxReports is reached already

                                                              Processing triggers for initramfs-tools (0.122ubuntu8.10) ...

update-initramfs: Generating /boot/initrd.img-4.13.0-32-generic

Errors were encountered while processing:

 udev

 grub-common

 grub2-common

 grub-pc-bin

 grub-pc

 resolvconf

 binfmt-support

E: Sub-process /usr/bin/dpkg returned an error code (1)

cd /var/lib/dpkg/info/

然后：

sudo mv udev.postinst udev.postinst.bak
sudo mv grub-common.postinst grub-common.postinst.bak
...

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其中，命令里的 udev，grub-common 之类的软件包名，就是前面的错误信息里列出来的所有软件包名，当你把所有的那些文件全部重命名之后，再重新执行任何安装软件的命令 sudo apt-get install xxx，就会发现一切正常了。

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