dpkg --configure -a

Setting up mysql-server-5.5 (5.5.35+dfsg-1ubuntu1) ...
start: Job failed to start
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing package mysql-server-5.5 (--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-5.5; however:
Package mysql-server-5.5 is not configured yet.

dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mysql-server-5.5
mysql-server

apt-get install mysql-server

root@nwsecure:/# apt-get install mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libdbd-mysql-perl libmysqlclient18 mysql-client-5.5 mysql-client-core-5.5 mysql-common mysql-server-5.5 mysql-server-core-5.5
Suggested packages:
  tinyca mailx
The following NEW packages will be installed:
  libdbd-mysql-perl libmysqlclient18 mysql-client-5.5 mysql-client-core-5.5 mysql-common mysql-server mysql-server-5.5 mysql-server-core-5.5
0 upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/8058 kB of archives.
After this operation, 93.9 MB of additional disk space will be used.
Do you want to continue? [Y/n]
Preconfiguring packages ...
Selecting previously unselected package mysql-common.
(Reading database ... 21900 files and directories currently installed.)
Preparing to unpack .../mysql-common_5.5.35+dfsg-1ubuntu1_all.deb ...
Unpacking mysql-common (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package libmysqlclient18:amd64.
Preparing to unpack .../libmysqlclient18_5.5.35+dfsg-1ubuntu1_amd64.deb ...
Unpacking libmysqlclient18:amd64 (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package libdbd-mysql-perl.
Preparing to unpack .../libdbd-mysql-perl_4.025-1_amd64.deb ...
Unpacking libdbd-mysql-perl (4.025-1) ...
Selecting previously unselected package mysql-client-core-5.5.
Preparing to unpack .../mysql-client-core-5.5_5.5.35+dfsg-1ubuntu1_amd64.deb ...
Unpacking mysql-client-core-5.5 (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package mysql-client-5.5.
Preparing to unpack .../mysql-client-5.5_5.5.35+dfsg-1ubuntu1_amd64.deb ...
Unpacking mysql-client-5.5 (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package mysql-server-core-5.5.
Preparing to unpack .../mysql-server-core-5.5_5.5.35+dfsg-1ubuntu1_amd64.deb ...
Unpacking mysql-server-core-5.5 (5.5.35+dfsg-1ubuntu1) ...
Setting up mysql-common (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package mysql-server-5.5.
(Reading database ... 22091 files and directories currently installed.)
Preparing to unpack .../mysql-server-5.5_5.5.35+dfsg-1ubuntu1_amd64.deb ...
Unpacking mysql-server-5.5 (5.5.35+dfsg-1ubuntu1) ...
Selecting previously unselected package mysql-server.
Preparing to unpack .../mysql-server_5.5.35+dfsg-1ubuntu1_all.deb ...
Unpacking mysql-server (5.5.35+dfsg-1ubuntu1) ...
Setting up libmysqlclient18:amd64 (5.5.35+dfsg-1ubuntu1) ...
Setting up libdbd-mysql-perl (4.025-1) ...
Setting up mysql-client-core-5.5 (5.5.35+dfsg-1ubuntu1) ...
Setting up mysql-client-5.5 (5.5.35+dfsg-1ubuntu1) ...
Setting up mysql-server-core-5.5 (5.5.35+dfsg-1ubuntu1) ...
Setting up mysql-server-5.5 (5.5.35+dfsg-1ubuntu1) ...
start: Job failed to start
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing package mysql-server-5.5 (--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-5.5; however:
  Package mysql-server-5.5 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.19-0ubuntu6) ...
Errors were encountered while processing:
 mysql-server-5.5
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)