Error installing gnome-system tools, gives an error with man-db

 sudo fuser /var/cache/debconf/config.dat:
/var/cache/debconf/config.dat: 3413

pstree -s 3413:
init───aptd───aptd───sh───dpkg-preconfigu─┬─dpkg-preconfigu
                                                                                        └─samsungmfp-scan

Console:

sudo apt-get install gnome-system-tools
[sudo] password for tisa:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libencode-locale-perl libfile-listing-perl libfont-afm-perl
  libhtml-form-perl libhtml-format-perl libhtml-parser-perl
  libhtml-tagset-perl libhtml-tree-perl libhttp-cookies-perl
  libhttp-daemon-perl libhttp-date-perl libhttp-message-perl
  libhttp-negotiate-perl libio-socket-inet6-perl libio-socket-ssl-perl
  liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl
  libnet-dbus-perl libnet-http-perl libnet-ssleay-perl liboobs-1-5
  libsocket6-perl libtie-ixhash-perl liburi-perl libwww-perl
  libwww-robotrules-perl libxml-parser-perl libxml-twig-perl libxml-xpath-perl
  system-tools-backends
Suggested packages:
  ntp libdata-dump-perl libcrypt-ssleay-perl libauthen-ntlm-perl
  libunicode-map8-perl libunicode-string-perl xml-twig-tools
The following NEW packages will be installed:
  gnome-system-tools libencode-locale-perl libfile-listing-perl
  libfont-afm-perl libhtml-form-perl libhtml-format-perl libhtml-parser-perl
  libhtml-tagset-perl libhtml-tree-perl libhttp-cookies-perl
  libhttp-daemon-perl libhttp-date-perl libhttp-message-perl
  libhttp-negotiate-perl libio-socket-inet6-perl libio-socket-ssl-perl
  liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl
  libnet-dbus-perl libnet-http-perl libnet-ssleay-perl liboobs-1-5
  libsocket6-perl libtie-ixhash-perl liburi-perl libwww-perl
  libwww-robotrules-perl libxml-parser-perl libxml-twig-perl libxml-xpath-perl
  system-tools-backends
0 upgraded, 32 newly installed, 0 to remove and 170 not upgraded.
Need to get 4,383 kB of archives.
After this operation, 14.2 MB of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://es.archive.ubuntu.com/ubuntu/ precise/main liburi-perl all 1.59-1 [90.3 kB]
Get:2 http://es.archive.ubuntu.com/ubuntu/ precise/main libencode-locale-perl all 1.02-2 [12.0 kB]
Get:3 http://es.archive.ubuntu.com/ubuntu/ precise/main libhttp-date-perl all 6.00-1 [10.1 kB]
Get:4 http://es.archive.ubuntu.com/ubuntu/ precise/main libfile-listing-perl all 6.03-1 [9,690 B]
Get:5 http://es.archive.ubuntu.com/ubuntu/ precise/main libhtml-tagset-perl all 3.20-2 [13.5 kB]
Get:6 http://es.archive.ubuntu.com/ubuntu/ precise/main libhtml-parser-perl amd64 3.69-1build1 [97.3 kB]
Get:7 http://es.archive.ubuntu.com/ubuntu/ precise/main libhtml-tree-perl all 4.2-1 [205 kB]
Get:8 http://es.archive.ubuntu.com/ubuntu/ precise/main liblwp-mediatypes-perl all 6.01-1 [17.5 kB]
Get:9 http://es.archive.ubuntu.com/ubuntu/ precise/main libhttp-message-perl all 6.01-1 [77.6 kB]
Get:10 http://es.archive.ubuntu.com/ubuntu/ precise/main libhttp-cookies-perl all 6.00-2 [23.3 kB]
Get:11 http://es.archive.ubuntu.com/ubuntu/ precise/main libhttp-negotiate-perl all 6.00-2 [13.4 kB]
Get:12 http://es.archive.ubuntu.com/ubuntu/ precise/main libnet-http-perl all 6.02-1 [23.5 kB]
Get:13 http://es.archive.ubuntu.com/ubuntu/ precise/main libnet-ssleay-perl amd64 1.42-1build1 [188 kB]
Get:14 http://es.archive.ubuntu.com/ubuntu/ precise/main libio-socket-ssl-perl all 1.53-1 [47.5 kB]
Get:15 http://es.archive.ubuntu.com/ubuntu/ precise/main liblwp-protocol-https-perl all 6.02-1 [6,746 B]
Get:16 http://es.archive.ubuntu.com/ubuntu/ precise/main libwww-robotrules-perl all 6.01-1 [14.1 kB]
Get:17 http://es.archive.ubuntu.com/ubuntu/ precise/main libwww-perl all 6.03-1 [156 kB]
Get:18 http://es.archive.ubuntu.com/ubuntu/ precise/main libxml-parser-perl amd64 2.41-1build1 [265 kB]
Get:19 http://es.archive.ubuntu.com/ubuntu/ precise/main libxml-twig-perl all 1:3.39-1ubuntu1 [167 kB]
Get:20 http://es.archive.ubuntu.com/ubuntu/ precise/universe libnet-dbus-perl amd64 1.0.0-1build1 [219 kB]
Get:21 http://es.archive.ubuntu.com/ubuntu/ precise/universe system-tools-backends amd64 2.10.2-1ubuntu1 [129 kB]
Get:22 http://es.archive.ubuntu.com/ubuntu/ precise/main libfont-afm-perl all 1.20-1 [14.3 kB]
Get:23 http://es.archive.ubuntu.com/ubuntu/ precise/main libhtml-form-perl all 6.00-1 [22.8 kB]
Get:24 http://es.archive.ubuntu.com/ubuntu/ precise/main libhtml-format-perl all 2.10-1 [40.6 kB]
Get:25 http://es.archive.ubuntu.com/ubuntu/ precise/main libhttp-daemon-perl all 6.00-1 [16.7 kB]
Get:26 http://es.archive.ubuntu.com/ubuntu/ precise/main libsocket6-perl amd64 0.23-1build2 [21.9 kB]
Get:27 http://es.archive.ubuntu.com/ubuntu/ precise/main libio-socket-inet6-perl all 2.69-2 [14.3 kB]
Get:28 http://es.archive.ubuntu.com/ubuntu/ precise/main libmailtools-perl all 2.08-1 [84.0 kB]
Get:29 http://es.archive.ubuntu.com/ubuntu/ precise/universe liboobs-1-5 amd64 3.0.0-1 [72.1 kB]
Get:30 http://es.archive.ubuntu.com/ubuntu/ precise/main libtie-ixhash-perl all 1.21-2 [11.9 kB]
Get:31 http://es.archive.ubuntu.com/ubuntu/ precise/main libxml-xpath-perl all 1.13-7 [80.7 kB]
Get:32 http://es.archive.ubuntu.com/ubuntu/ precise/universe gnome-system-tools amd64 3.0.0-2ubuntu1 [2,218 kB]
Fetched 4,383 kB in 31s (141 kB/s)
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
Selecting previously unselected package liburi-perl.
(Reading database ... 179988 files and directories currently installed.)
Unpacking liburi-perl (from .../liburi-perl_1.59-1_all.deb) ...
Selecting previously unselected package libencode-locale-perl.
Unpacking libencode-locale-perl (from .../libencode-locale-perl_1.02-2_all.deb) ...
Selecting previously unselected package libhttp-date-perl.
Unpacking libhttp-date-perl (from .../libhttp-date-perl_6.00-1_all.deb) ...
Selecting previously unselected package libfile-listing-perl.
Unpacking libfile-listing-perl (from .../libfile-listing-perl_6.03-1_all.deb) ...
Selecting previously unselected package libhtml-tagset-perl.
Unpacking libhtml-tagset-perl (from .../libhtml-tagset-perl_3.20-2_all.deb) ...
Selecting previously unselected package libhtml-parser-perl.
Unpacking libhtml-parser-perl (from .../libhtml-parser-perl_3.69-1build1_amd64.deb) ...
Selecting previously unselected package libhtml-tree-perl.
Unpacking libhtml-tree-perl (from .../libhtml-tree-perl_4.2-1_all.deb) ...
Selecting previously unselected package liblwp-mediatypes-perl.
Unpacking liblwp-mediatypes-perl (from .../liblwp-mediatypes-perl_6.01-1_all.deb) ...
Selecting previously unselected package libhttp-message-perl.
Unpacking libhttp-message-perl (from .../libhttp-message-perl_6.01-1_all.deb) ...
Selecting previously unselected package libhttp-cookies-perl.
Unpacking libhttp-cookies-perl (from .../libhttp-cookies-perl_6.00-2_all.deb) ...
Selecting previously unselected package libhttp-negotiate-perl.
Unpacking libhttp-negotiate-perl (from .../libhttp-negotiate-perl_6.00-2_all.deb) ...
Selecting previously unselected package libnet-http-perl.
Unpacking libnet-http-perl (from .../libnet-http-perl_6.02-1_all.deb) ...
Selecting previously unselected package libnet-ssleay-perl.
Unpacking libnet-ssleay-perl (from .../libnet-ssleay-perl_1.42-1build1_amd64.deb) ...
Selecting previously unselected package libio-socket-ssl-perl.
Unpacking libio-socket-ssl-perl (from .../libio-socket-ssl-perl_1.53-1_all.deb) ...
Selecting previously unselected package liblwp-protocol-https-perl.
Unpacking liblwp-protocol-https-perl (from .../liblwp-protocol-https-perl_6.02-1_all.deb) ...
Selecting previously unselected package libwww-robotrules-perl.
Unpacking libwww-robotrules-perl (from .../libwww-robotrules-perl_6.01-1_all.deb) ...
Selecting previously unselected package libwww-perl.
Unpacking libwww-perl (from .../libwww-perl_6.03-1_all.deb) ...
Selecting previously unselected package libxml-parser-perl.
Unpacking libxml-parser-perl (from .../libxml-parser-perl_2.41-1build1_amd64.deb) ...
Selecting previously unselected package libxml-twig-perl.
Unpacking libxml-twig-perl (from .../libxml-twig-perl_1%3a3.39-1ubuntu1_all.deb) ...
Selecting previously unselected package libnet-dbus-perl.
Unpacking libnet-dbus-perl (from .../libnet-dbus-perl_1.0.0-1build1_amd64.deb) ...
Selecting previously unselected package system-tools-backends.
Unpacking system-tools-backends (from .../system-tools-backends_2.10.2-1ubuntu1_amd64.deb) ...
Selecting previously unselected package libfont-afm-perl.
Unpacking libfont-afm-perl (from .../libfont-afm-perl_1.20-1_all.deb) ...
Selecting previously unselected package libhtml-form-perl.
Unpacking libhtml-form-perl (from .../libhtml-form-perl_6.00-1_all.deb) ...
Selecting previously unselected package libhtml-format-perl.
Unpacking libhtml-format-perl (from .../libhtml-format-perl_2.10-1_all.deb) ...
Selecting previously unselected package libhttp-daemon-perl.
Unpacking libhttp-daemon-perl (from .../libhttp-daemon-perl_6.00-1_all.deb) ...
Selecting previously unselected package libsocket6-perl.
Unpacking libsocket6-perl (from .../libsocket6-perl_0.23-1build2_amd64.deb) ...
Selecting previously unselected package libio-socket-inet6-perl.
Unpacking libio-socket-inet6-perl (from .../libio-socket-inet6-perl_2.69-2_all.deb) ...
Selecting previously unselected package libmailtools-perl.
Unpacking libmailtools-perl (from .../libmailtools-perl_2.08-1_all.deb) ...
Selecting previously unselected package liboobs-1-5.
Unpacking liboobs-1-5 (from .../liboobs-1-5_3.0.0-1_amd64.deb) ...
Selecting previously unselected package libtie-ixhash-perl.
Unpacking libtie-ixhash-perl (from .../libtie-ixhash-perl_1.21-2_all.deb) ...
Selecting previously unselected package libxml-xpath-perl.
Unpacking libxml-xpath-perl (from .../libxml-xpath-perl_1.13-7_all.deb) ...
Selecting previously unselected package gnome-system-tools.
Unpacking gnome-system-tools (from .../gnome-system-tools_3.0.0-2ubuntu1_amd64.deb) ...
Processing triggers for man-db ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing man-db (--unpack):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for doc-base ...
Processing 1 added doc-base file...
Processing triggers for libglib2.0-0:i386 ...
Processing triggers for libglib2.0-0 ...
Processing triggers for hicolor-icon-theme ...
Processing triggers for desktop-file-utils ...
Processing triggers for bamfdaemon ...
Rebuilding /usr/share/applications/bamf.index...
Processing triggers for gnome-menus ...
Errors were encountered while processing:
 man-db
E: Sub-process /usr/bin/dpkg returned an error code (1)

Good Luck!