sub-process /usr/bin/dpkg returned an error code (1) ubuntu 18.04 code example

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

sudo dpkg --configure -a

Example 2: nginx E: Sub-process /usr/bin/dpkg returned an error code (1)

#remove nginx
$ sudo apt-get remove nginx* --purge after that I installed nginx-common

# install following
$ sudo apt-get install nginx-common
$ sudo apt-get install nginx

#Then it will work well