title: E: Sub-process /usr/bin/dpkg returned an error code (1) ( might be different than other errors like this )
body: <pre><code>sudo apt upgrade
  </code></pre>
  <p>I am recieving the following error</p>
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  You might want to run 'apt --fix-broken install' to correct these.
  The following packages have unmet dependencies:
   mysql-server : Depends: mysql-server-8.0 but it is not installed
  E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
  </code></pre>
  <p>Tried to fix-broken install</p>
  <pre><code>sudo apt -- fix-broken install
  </code></pre>
  <p>and recieving the following error</p>
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Correcting dependencies... Done
  The following additional packages will be installed:
    mysql-server-8.0
  Suggested packages:
    mailx tinyca
  The following NEW packages will be installed:
    mysql-server-8.0
  0 upgraded, 1 newly installed, 0 to remove and 14 not upgraded.
  1 not fully installed or removed.
  Need to get 0 B/1,271 kB of archives.
  After this operation, 1,479 kB of additional disk space will be used.
  Do you want to continue? [Y/n] y
  Preconfiguring packages ...
  dpkg: warning: files list file for package 'mysql
  -server-core-8.0' missing; assuming package has n
  o files currently installed
  (Reading database ... 215620 files and directorie
  s currently installed.)
  Preparing to unpack .../mysql-server-8.0_8.0.28-0
  ubuntu0.20.04.3_amd64.deb ...
  Failed to stop mysql.service: Unit mysql.service 
  not loaded.
  invoke-rc.d: initscript mysql, action &quot;stop&quot; fail
  ed.
  invoke-rc.d returned 5
  There is a MySQL server running, but we failed in
   our attempts to stop it.
  Stop it yourself and try again!
  dpkg: error processing archive /var/cache/apt/arc
  hives/mysql-server-8.0_8.0.28-0ubuntu0.20.04.3_am
  d64.deb (--unpack):
   new mysql-server-8.0 package pre-installation sc
  ript subprocess returned error exit status 1
  Errors were encountered while processing:
   /var/cache/apt/archives/mysql-server-8.0_8.0.28-
  0ubuntu0.20.04.3_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  </code></pre>
  <p>I tried with several blogs and solutions but i didn't got solution yet.</p>
  <p>Ttied with <em><strong>sudo dpkg --configure -a</strong></em> , <em><strong>sudo apt-get install -f</strong></em></p>