$ sudo apt 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 0 not upgraded.
Need to get 0 B/10.2 MB of archives.
After this operation, 94.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Preconfiguring packages ...
Selecting previously unselected package mysql-server-core-5.7.
(Reading database ... 388842 files and directories currently installed.)
Preparing to unpack .../mysql-server-core-5.7_5.7.18-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-server-core-5.7 (5.7.18-0ubuntu0.16.04.1) ...
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_5.7.18-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-server-5.7 (5.7.18-0ubuntu0.16.04.1) ...
Selecting previously unselected package mysql-server.
Preparing to unpack .../mysql-server_5.7.18-0ubuntu0.16.04.1_all.deb ...
Unpacking mysql-server (5.7.18-0ubuntu0.16.04.1) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for libc-bin (2.23-0ubuntu9) ...
Processing triggers for systemd (229-4ubuntu17) ...
Processing triggers for ureadahead (0.100.0-19) ...
Setting up mysql-server-core-5.7 (5.7.18-0ubuntu0.16.04.1) ...
Setting up libevent-core-2.0-5:amd64 (2.0.21-stable-2ubuntu0.16.04.1) ...
Setting up mysql-server-5.7 (5.7.18-0ubuntu0.16.04.1) ...
update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Renaming removed key_buffer and myisam-recover options (if present)
insserv: warning: script 'youtrack' missing LSB tags and overrides
insserv: There is a loop between service BitMeter_Capture_Daemon and youtrack if stopped
insserv:  loop involving service youtrack at depth 2
insserv:  loop involving service BitMeter_Capture_Daemon at depth 1
insserv: Stopping youtrack depends on bitmeter 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 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) ...
Errors were encountered while processing:
 mysql-server-5.7
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)