[humanpuff69]

hi guys

so i just want to warn you all . there are a bug that will pretty much break your vps . i try the solution that the internet gives by googling but have no luck so i just reinstalled my vps but here how its done
what you need to do is install mysql by using "apt-get install mysql-server" and after that try to purge it . if you lucky enough it will create a dpkg error regarding the mysql-server-5.7 and you basically cannot uninstall it . i try all the tutorial even deleting all of my databse content but my server s still screwed . you cannot use your apt-get again (most application failed to install after you trigger this bug . some that does install spesifically that dosnt need mysql)
and after i search i got the cause of this problem it look like that it is a bug and i dont know if it already fixed but from my experience it is still here . i mean the bug
so just be careful . if you already installed mysql on your server that have 16.04 (i see 14.04 that get this bg as well so be careful) dont uninstall mysql-server otherwise your server will be screwed

Here is the thing that you will get if your server aready get screwed

Terminal

phpmyadmin is already the newest version (4:4.5.4.1-2ubuntu2).
0 upgraded, 0 newly installed, 0 to remove and 116 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up mysql-server-5.7 (5.7.19-0ubuntu0.16.04.1) ...
invoke-rc.d: policy-rc.d denied execution of stop.
/var/lib/dpkg/info/mysql-server-5.7.postinst: line 143: /usr/share/mysql-common/configure-symlinks: No such file or directory
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

and you think you can uninstall and then install it . WRONG you CANT . if you purge it and then install it again it will come back and even if you just uninstall it it will still be stuck there

Terminal

apt-get install mysql-server
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libevent-core-2.0-5 mysql-server-5.7 mysql-server-core-5.7
Suggested packages:
  tinyca
The following NEW packages will be installed:
  libevent-core-2.0-5 mysql-server mysql-server-5.7 mysql-server-core-5.7
0 upgraded, 4 newly installed, 0 to remove and 116 not upgraded.
Need to get 7,658 kB/10.1 MB of archives.
After this operation, 94.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 mysql-server-core-5.7 amd64 5.7.19-0ubuntu0.16.04.1 [7,588 kB]
Get:2 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 libevent-core-2.0-5 amd64 2.0.21-stable-2ubuntu0.16.04.1 [70.6 kB]
Fetched 7,658 kB in 3s (2,418 kB/s)       
Preconfiguring packages ...
Selecting previously unselected package mysql-server-core-5.7.
(Reading database ... 90254 files and directories currently installed.)
Preparing to unpack .../mysql-server-core-5.7_5.7.19-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-server-core-5.7 (5.7.19-0ubuntu0.16.04.1) ...
Selecting previously unselected package libevent-core-2.0-5:amd64.
Preparing to unpack .../libevent-core-2.0-5_2.0.21-stable-2ubuntu0.16.04.1_amd64.deb ...
Unpacking libevent-core-2.0-5:amd64 (2.0.21-stable-2ubuntu0.16.04.1) ...
Selecting previously unselected package mysql-server-5.7.
Preparing to unpack .../mysql-server-5.7_5.7.19-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-server-5.7 (5.7.19-0ubuntu0.16.04.1) ...
Selecting previously unselected package mysql-server.
Preparing to unpack .../mysql-server_5.7.19-0ubuntu0.16.04.1_all.deb ...
Unpacking mysql-server (5.7.19-0ubuntu0.16.04.1) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Processing triggers for systemd (229-4ubuntu19) ...
Setting up mysql-server-core-5.7 (5.7.19-0ubuntu0.16.04.1) ...
Setting up libevent-core-2.0-5:amd64 (2.0.21-stable-2ubuntu0.16.04.1) ...
Setting up mysql-server-5.7 (5.7.19-0ubuntu0.16.04.1) ...
invoke-rc.d: policy-rc.d denied execution of stop.
/var/lib/dpkg/info/mysql-server-5.7.postinst: line 143: /usr/share/mysql-common/configure-symlinks: No such file or directory
dpkg: error processing package mysql-server-5.7 (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-5.7; however:
  Package mysql-server-5.7 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Processing triggers for systemd (229-4ubuntu19) ...
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)