package mariadb-server-10.0 10.0.29-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Jerick Icamina]

I cant replace the default password AF

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mariadb-server-10.0 10.0.29-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
Uname: Linux 4.4.0-66-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Mon Mar 27 11:36:56 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2017-03-04 (23 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Logs.var.log.daemon.log:

Logs.var.log.mysql.error.log:
MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLVarLibDirListing: ['multi-master.info', 'aria_log_control', 'ib_logfile1', 'aria_log.00000001', 'jerck-Satellite-L40D-A.err', 'mysql', 'ib_logfile0', 'jerck-Satellite-L40D-A.pid', 'debian-10.0.flag', 'ibdata1', 'performance_schema']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic root=UUID=b710e7e3-eec8-4116-90b6-799c94e4a2b8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: mariadb-10.0
Title: package mariadb-server-10.0 10.0.29-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.mysql.debian-start: [deleted]
modified.conffile..etc.mysql.mariadb.conf.d.50-mysqld_safe.cnf: [deleted]
modified.conffile..etc.mysql.mariadb.conf.d.50-server.cnf: [deleted]

[Faustin (fauust)]

Hi Jerick,
thank you for taking time to report this.

Relevant error lines are:
Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mysql, action "start" failed.
dpkg: error processing package mariadb-server-10.0 (--configure):
 subprocess installed post-installation script returned error exit status 1

Did you try any of this (journalctl -xe or ystemctl status mysql.service)?