Update Error: dpkg error code 1

Recently, I come across update error code 1 while updating my Ubuntu. And this isn’t the first time it happens.

It can be in different formats, such as:

subprocess installed post-installation script returned error exit status 10

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

dpkg: error processing package dpkg (--configure):
 installed dpkg package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 dpkg

Quick Resolution

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1. Remove post info files of those troubleshome package.

$ sudo mv /var/lib/dpkg/info/dpkg.* /tmp

Note that package name can be others, such as openssh-server.* or dpkg.*.

2. Use force install.

$ sudo apt install -f 

3. Reconfigure package database.

$ sudo dpkg --configure -a 

Root Cause

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Most likely, the package got corrupted while installing a package. Usually reconfiguring fix the problem. And if a package installation was interrupted previously, then force installing is needed to resolve it.