root@ubuntu-512mb-sgp1-01:~# sudo apt-get install phpmyadmin
Reading package lists... Done
Building dependency tree
Reading state information... Done
phpmyadmin is already the newest version (4:4.5.4.1-2ubuntu2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
15 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
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LC_CTYPE = "UTF-8",
    LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
Setting up php7.0-mysql (7.0.13-0ubuntu0.16.04.1) ...
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package php7.0-mysql (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of php-mysql:
 php-mysql depends on php7.0-mysql; however:
  Package php7.0-mysql is not configured yet.

dpkg: error processing package php-mysql (--configure):
 dependency problems - leaving unconfigured
Setting up dbconfig-common (2.0.4ubuntu1) ...
No apport report written because the error message indicates its a followup error from a previous failure.
                         locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package dbconfig-common (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of dbconfig-mysql:
 dbconfig-mysql depends on dbconfig-common (= 2.0.4ubuntu1); however:
  Package dbconfig-common is not configured yet.

dpkg: error processing package dbconfig-mysql (--configure):
 dependency problems - leaving unconfigured
Setting up php7.0-xml (7.0.13-0ubuntu0.16.04.1) ...No apport report written because MaxReports is reached already

locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package php7.0-xml (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of php-xml:No apport report written because MaxReports is reached already

 php-xml depends on php7.0-xml; however:
  Package php7.0-xml is not configured yet.

dpkg: error processing package php-xml (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of php-pear:No apport report written because MaxReports is reached already

 php-pear depends on php-xml; however:
  Package php-xml is not configured yet.
  Package php7.0-xml which provides php-xml is not configured yet.

dpkg: error processing package php-pear (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of php-gettext:No apport report written because MaxReports is reached already

 php-gettext depends on php-pear; however:
  Package php-pear is not configured yet.

dpkg: error processing package php-gettext (--configure):
 dependency problems - leaving unconfigured
Setting up php7.0-mbstring (7.0.13-0ubuntu0.16.04.1) ...No apport report written because MaxReports is reached already

locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package php7.0-mbstring (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of php-mbstring:No apport report written because MaxReports is reached already

 php-mbstring depends on php7.0-mbstring; however:
  Package php7.0-mbstring is not configured yet.

dpkg: error processing package php-mbstring (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of phpmyadmin:No apport report written because MaxReports is reached already

 phpmyadmin depends on php-mysql | php-mysqli | php-mysqlnd; however:
  Package php-mysql is not configured yet.
  Package php-mysqli is not installed.
  Package php7.0-mysql which provides php-mysqli is not configured yet.
  Package php-mysqlnd is not installed.
  Package php7.0-mysql which provides php-mysqlnd is not configured yet.
 phpmyadmin depends on dbconfig-mysql | dbconfig-no-thanks | dbconfig-common (<< 2.0.0); however:
  Package dbconfig-mysql is not configured yet.
  Package dbconfig-no-thanks is not installed.
  Version of dbconfig-common on system is 2.0.4ubuntu1.
 phpmyadmin depends on php-gettext; however:
  Package php-gettext is not configured yet.
 phpmyadmin depends on php-mbstring; however:
  Package php-mbstring is not configured yet.
  Package php7.0-mbstring which provides php-mbstring is not configured yet.

dpkg: error processing package phpmyadmin (--configure):
 dependency problems - leaving unconfigured
Setting up php7.0-gd (7.0.13-0ubuntu0.16.04.1) ...No apport report written because MaxReports is reached already

locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package php7.0-gd (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of php-gd:No apport report written because MaxReports is reached already

 php-gd depends on php7.0-gd; however:
  Package php7.0-gd is not configured yet.

dpkg: error processing package php-gd (--configure):
 dependency problems - leaving unconfigured
Setting up php7.0-mcrypt (7.0.13-0ubuntu0.16.04.1) ...No apport report written because MaxReports is reached already

locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing package php7.0-mcrypt (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of php-mcrypt:No apport report written because MaxReports is reached already

 php-mcrypt depends on php7.0-mcrypt; however:
  Package php7.0-mcrypt is not configured yet.

dpkg: error processing package php-mcrypt (--configure):
 dependency problems - leaving unconfigured
Processing triggers for php7.0-fpm (7.0.13-0ubuntu0.16.04.1) ...No apport report written because MaxReports is reached already

Errors were encountered while processing:
 php7.0-mysql
 php-mysql
 dbconfig-common
 dbconfig-mysql
 php7.0-xml
 php-xml
 php-pear
 php-gettext
 php7.0-mbstring
 php-mbstring
 phpmyadmin
 php7.0-gd
 php-gd
 php7.0-mcrypt
 php-mcrypt
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@ubuntu-512mb-sgp1-01:~#