Ububtu Software Centre is not getting opened

Reboot (if you haven't since) and run:

sudo apt-get update

What is the output please?

The output is as follows:-

mallick@mallick-desktop:~$ sudo apt-get update
[sudo] password for mallick:
Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [93.3 kB]
Hit:2 http://archive.ubuntu.com/ubuntu xenial InRelease
Hit:3 http://archive.canonical.com/ubuntu xenial InRelease
Hit:4 http://in.archive.ubuntu.com/ubuntu xenial InRelease
Get:5 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease [94.5 kB]
Hit:6 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:7 http://in.archive.ubuntu.com/ubuntu xenial-proposed InRelease [247 kB]
Get:8 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages [83.1 kB]
Get:9 http://in.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [26.2 kB]
Get:10 http://in.archive.ubuntu.com/ubuntu xenial-proposed/main i386 Packages [51.0 kB]
Get:11 http://in.archive.ubuntu.com/ubuntu xenial-proposed/main Translation-en [22.2 kB]
Get:12 http://in.archive.ubuntu.com/ubuntu xenial-proposed/main i386 DEP-11 Metadata [6,254 B]
Get:13 http://in.archive.ubuntu.com/ubuntu xenial-proposed/universe i386 Packages [37.0 kB]
Get:14 http://in.archive.ubuntu.com/ubuntu xenial-proposed/universe Translation-en [14.9 kB]
Get:15 http://in.archive.ubuntu.com/ubuntu xenial-proposed/universe i386 DEP-11 Metadata [3,156 B]
Fetched 678 kB in 25s (26.7 kB/s)
Reading package lists... Done
mallick@mallick-desktop:~$

Thank you for active support - Biplab.

Looks fine. If you run:

sudo apt-get --reinstall install nano

Does it install OK?

It get installed, but Ubuntu Software Centre is opening.
Thank you very much and expecting a solution from you - Biplab.

https://help.ubuntu.com/community/PackageManagerTroubleshootingProcedure

Please post the full Terminal output from step 10 and post the output here:

https://answers.launchpad.net/ubuntu/+question/293685

Sir, the output of Step 10 is as follows:-

mallick@mallick-desktop:~$ sudo rm /usr/lib/python*/dist-packages/__pycache__/*pyc
[sudo] password for mallick:
mallick@mallick-desktop:~$ sudo apt-get install --reinstall python3-gi
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
  iucode-tool
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 164 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python3-gi i386 3.20.0-0ubuntu1 [164 kB]
Fetched 164 kB in 1s (83.1 kB/s)
(Reading database ... 213221 files and directories currently installed.)
Preparing to unpack .../python3-gi_3.20.0-0ubuntu1_i386.deb ...
Unpacking python3-gi (3.20.0-0ubuntu1) over (3.20.0-0ubuntu1) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Setting up python3-gi (3.20.0-0ubuntu1) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
mallick@mallick-desktop:~$ sudo apt-get purge software-center
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'software-center' is not installed, so not removed
The following package was automatically installed and is no longer required:
  iucode-tool
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
mallick@mallick-desktop:~$ rm -rf ~/.cache/software-center
mallick@mallick-desktop:~$ rm -rf ~/.config/software-center
mallick@mallick-desktop:~$ rm -rf ~/.cache/update-manager-core
mallick@mallick-desktop:~$ sudo rm /var/lib/apt-xapian-index/cataloged_times.p
rm: cannot remove '/var/lib/apt-xapian-index/cataloged_times.p': No such file or directory
mallick@mallick-desktop:~$ sudo rm /var/lib/apt-xapian-index/values
rm: cannot remove '/var/lib/apt-xapian-index/values': No such file or directory
mallick@mallick-desktop:~$ sudo update-apt-xapian-index --verbose --force
sudo: update-apt-xapian-index: command not found
mallick@mallick-desktop:~$ sudo update-apt-xapian-index --force
sudo: update-apt-xapian-index: command not found
mallick@mallick-desktop:~$ sudo apt-get update
Hit:1 http://in.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://archive.ubuntu.com/ubuntu xenial InRelease
Get:3 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease [94.5 kB]
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [93.3 kB]
Hit:5 http://archive.canonical.com/ubuntu xenial InRelease
Hit:6 http://in.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:7 http://in.archive.ubuntu.com/ubuntu xenial-proposed InRelease [247 kB]
Fetched 435 kB in 3s (137 kB/s)
Reading package lists... Done
mallick@mallick-desktop:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following package was automatically installed and is no longer required:
  iucode-tool
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
mallick@mallick-desktop:~$ sudo apt-get install software-center ubuntu-desktop
Reading package lists... Done
Building dependency tree
Reading state information... Done
ubuntu-desktop is already the newest version (1.361).
The following package was automatically installed and is no longer required:
  iucode-tool
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  apt-xapian-index gir1.2-gmenu-3.0 libxapian-1.3-5 oneconf oneconf-common
  python-apt python-aptdaemon python-aptdaemon.gtk3widgets python-attr
  python-blinker python-bs4 python-cairo python-cffi-backend python-chardet
  python-cryptography python-cups python-dbus python-debian python-debtagshw
  python-defer python-dirspec python-enum34 python-gi python-gi-cairo
  python-html5lib python-httplib2 python-idna python-ipaddress python-jwt
  python-lxml python-oauthlib python-oneconf python-openssl python-pam
  python-piston-mini-client python-pkg-resources python-pyasn1
  python-pyasn1-modules python-serial python-service-identity python-six
  python-twisted-bin python-twisted-core python-twisted-web
  python-ubuntu-sso-client python-xapian python-xdg python-zope.interface
  python3-oneconf python3-piston-mini-client python3-xapian1.3
  software-center-aptdaemon-plugins ubuntu-sso-client
Suggested packages:
  xapian-tools python-apt-dbg python-apt-doc python-blinker-doc
  python-cryptography-doc python-cryptography-vectors python-dbus-doc
  python-dbus-dbg python-enum34-doc python-genshi python-crypto
  python-lxml-dbg python-lxml-doc python-openssl-doc python-openssl-dbg
  python-pam-dbg python-setuptools python-wxgtk3.0 | python-wxgtk
  python-twisted-bin-dbg python-tk python-gtk2 python-glade2 python-qt3
  python-wxgtk3.0 xapian-doc ubuntu-sso-client-gui
The following NEW packages will be installed:
  apt-xapian-index gir1.2-gmenu-3.0 libxapian-1.3-5 oneconf oneconf-common
  python-apt python-aptdaemon python-aptdaemon.gtk3widgets python-attr
  python-blinker python-bs4 python-cairo python-cffi-backend python-chardet
  python-cryptography python-cups python-dbus python-debian python-debtagshw
  python-defer python-dirspec python-enum34 python-gi python-gi-cairo
  python-html5lib python-httplib2 python-idna python-ipaddress python-jwt
  python-lxml python-oauthlib python-oneconf python-openssl python-pam
  python-piston-mini-client python-pkg-resources python-pyasn1
  python-pyasn1-modules python-serial python-service-identity python-six
  python-twisted-bin python-twisted-core python-twisted-web
  python-ubuntu-sso-client python-xapian python-xdg python-zope.interface
  python3-oneconf python3-piston-mini-client python3-xapian1.3 software-center
  software-center-aptdaemon-plugins ubuntu-sso-client
0 upgraded, 54 newly installed, 0 to remove and 0 not upgraded.
Need to get 7,227 kB of archives.
After this operation, 42.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-dbus i386 1.2.0-3 [86.3 kB]
Get:2 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-dirspec all 13.10-1ubuntu1 [6,294 B]
Get:3 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-httplib2 all 0.9.1+dfsg-1 [34.2 kB]
Get:4 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-blinker all 1.3.dfsg2-1build1 [12.4 kB]
Get:5 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-cffi-backend i386 1.5.2-1ubuntu1 [61.1 kB]
Get:6 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-enum34 all 1.1.2-1 [35.8 kB]
Get:7 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-idna all 2.0-3 [35.1 kB]
Get:8 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-ipaddress all 1.0.16-1 [18.0 kB]
Get:9 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-pkg-resources all 20.7.0-1 [108 kB]
Get:10 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-pyasn1 all 0.1.9-1 [45.1 kB]
Get:11 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-six all 1.10.0-3 [10.9 kB]
Get:12 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-cryptography i386 1.2.3-1 [175 kB]
Get:13 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-jwt all 1.3.0-1 [20.3 kB]
Get:14 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-oauthlib all 1.0.3-1 [62.7 kB]
Get:15 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-openssl all 0.15.1-2build1 [84.1 kB]
Get:16 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-twisted-bin i386 16.0.0-1 [13.0 kB]
Get:17 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-zope.interface i386 4.1.3-1build1 [81.3 kB]
Get:18 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-attr all 15.2.0-1 [11.3 kB]
Get:19 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-pyasn1-modules all 0.0.7-0.1 [20.5 kB]
Get:20 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-service-identity all 16.0.0-2 [9,318 B]
Get:21 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-twisted-core all 16.0.0-1 [1,937 kB]
Get:22 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-twisted-web all 16.0.0-1 [75.1 kB]
Get:23 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-ubuntu-sso-client all 13.10-0ubuntu11 [49.8 kB]
Get:24 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 ubuntu-sso-client all 13.10-0ubuntu11 [2,780 B]
Get:25 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 libxapian-1.3-5 i386 1.3.4-0ubuntu6 [853 kB]
Get:26 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python3-xapian1.3 i386 1.3.4-0ubuntu1 [356 kB]
Get:27 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 apt-xapian-index all 0.47ubuntu8 [57.4 kB]
Get:28 http://in.archive.ubuntu.com/ubuntu xenial/main i386 gir1.2-gmenu-3.0 i386 3.13.3-6ubuntu3 [3,720 B]
Get:29 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-apt i386 1.1.0~beta1build1 [141 kB]
Get:30 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-bs4 all 4.4.1-1 [64.2 kB]
Get:31 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-cairo i386 1.8.8-2 [42.7 kB]
Get:32 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-chardet all 2.3.0-2 [96.3 kB]
Get:33 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-cups i386 1.9.73-0ubuntu2 [62.2 kB]
Get:34 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-debian all 0.1.27ubuntu2 [64.2 kB]
Get:35 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-debtagshw all 2.0.1ubuntu6 [8,466 B]
Get:36 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-gi i386 3.20.0-0ubuntu1 [205 kB]
Get:37 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-gi-cairo i386 3.20.0-0ubuntu1 [6,598 B]
Get:38 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-html5lib all 0.999-4 [83.1 kB]
Get:39 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-lxml i386 3.5.0-1build1 [814 kB]
Get:40 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-pam i386 0.4.2-13.2ubuntu2 [10.3 kB]
Get:41 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-serial all 3.0.1-1 [69.9 kB]
Get:42 http://in.archive.ubuntu.com/ubuntu xenial/main i386 python-xapian i386 1.2.22-2build1 [201 kB]
Get:43 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-xdg all 0.25-4 [31.4 kB]
Get:44 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-piston-mini-client all 0.7.5-0ubuntu2 [18.6 kB]
Get:45 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 software-center-aptdaemon-plugins all 0.1.6build1 [5,750 B]
Get:46 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-defer all 1.0.6-2build1 [10.7 kB]
Get:47 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-aptdaemon all 1.1.1+bzr982-0ubuntu14 [76.4 kB]
Get:48 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-aptdaemon.gtk3widgets all 1.1.1+bzr982-0ubuntu14 [13.8 kB]
Get:49 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 oneconf-common all 0.3.9 [5,992 B]
Get:50 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python3-piston-mini-client all 0.7.5-0ubuntu2 [18.4 kB]
Get:51 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python3-oneconf all 0.3.9 [19.4 kB]
Get:52 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 oneconf all 0.3.9 [5,462 B]
Get:53 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 python-oneconf all 0.3.9 [19.4 kB]
Get:54 http://in.archive.ubuntu.com/ubuntu xenial/universe i386 software-center all 16.01+16.04.20160420 [867 kB]
Fetched 7,227 kB in 1min 56s (62.0 kB/s)
Extracting templates from packages: 100%
Selecting previously unselected package python-dbus.
(Reading database ... 213221 files and directories currently installed.)
Preparing to unpack .../python-dbus_1.2.0-3_i386.deb ...
Unpacking python-dbus (1.2.0-3) ...
Selecting previously unselected package python-dirspec.
Preparing to unpack .../python-dirspec_13.10-1ubuntu1_all.deb ...
Unpacking python-dirspec (13.10-1ubuntu1) ...
Selecting previously unselected package python-httplib2.
Preparing to unpack .../python-httplib2_0.9.1+dfsg-1_all.deb ...
Unpacking python-httplib2 (0.9.1+dfsg-1) ...
Selecting previously unselected package python-blinker.
Preparing to unpack .../python-blinker_1.3.dfsg2-1build1_all.deb ...
Unpacking python-blinker (1.3.dfsg2-1build1) ...
Selecting previously unselected package python-cffi-backend.
Preparing to unpack .../python-cffi-backend_1.5.2-1ubuntu1_i386.deb ...
Unpacking python-cffi-backend (1.5.2-1ubuntu1) ...
Selecting previously unselected package python-enum34.
Preparing to unpack .../python-enum34_1.1.2-1_all.deb ...
Unpacking python-enum34 (1.1.2-1) ...
Selecting previously unselected package python-idna.
Preparing to unpack .../python-idna_2.0-3_all.deb ...
Unpacking python-idna (2.0-3) ...
Selecting previously unselected package python-ipaddress.
Preparing to unpack .../python-ipaddress_1.0.16-1_all.deb ...
Unpacking python-ipaddress (1.0.16-1) ...
Selecting previously unselected package python-pkg-resources.
Preparing to unpack .../python-pkg-resources_20.7.0-1_all.deb ...
Unpacking python-pkg-resources (20.7.0-1) ...
Selecting previously unselected package python-pyasn1.
Preparing to unpack .../python-pyasn1_0.1.9-1_all.deb ...
Unpacking python-pyasn1 (0.1.9-1) ...
Selecting previously unselected package python-six.
Preparing to unpack .../python-six_1.10.0-3_all.deb ...
Unpacking python-six (1.10.0-3) ...
Selecting previously unselected package python-cryptography.
Preparing to unpack .../python-cryptography_1.2.3-1_i386.deb ...
Unpacking python-cryptography (1.2.3-1) ...
Selecting previously unselected package python-jwt.
Preparing to unpack .../python-jwt_1.3.0-1_all.deb ...
Unpacking python-jwt (1.3.0-1) ...
Selecting previously unselected package python-oauthlib.
Preparing to unpack .../python-oauthlib_1.0.3-1_all.deb ...
Unpacking python-oauthlib (1.0.3-1) ...
Selecting previously unselected package python-openssl.
Preparing to unpack .../python-openssl_0.15.1-2build1_all.deb ...
Unpacking python-openssl (0.15.1-2build1) ...
Selecting previously unselected package python-twisted-bin.
Preparing to unpack .../python-twisted-bin_16.0.0-1_i386.deb ...
Unpacking python-twisted-bin (16.0.0-1) ...
Selecting previously unselected package python-zope.interface.
Preparing to unpack .../python-zope.interface_4.1.3-1build1_i386.deb ...
Unpacking python-zope.interface (4.1.3-1build1) ...
Selecting previously unselected package python-attr.
Preparing to unpack .../python-attr_15.2.0-1_all.deb ...
Unpacking python-attr (15.2.0-1) ...
Selecting previously unselected package python-pyasn1-modules.
Preparing to unpack .../python-pyasn1-modules_0.0.7-0.1_all.deb ...
Unpacking python-pyasn1-modules (0.0.7-0.1) ...
Selecting previously unselected package python-service-identity.
Preparing to unpack .../python-service-identity_16.0.0-2_all.deb ...
Unpacking python-service-identity (16.0.0-2) ...
Selecting previously unselected package python-twisted-core.
Preparing to unpack .../python-twisted-core_16.0.0-1_all.deb ...
Unpacking python-twisted-core (16.0.0-1) ...
Selecting previously unselected package python-twisted-web.
Preparing to unpack .../python-twisted-web_16.0.0-1_all.deb ...
Unpacking python-twisted-web (16.0.0-1) ...
Selecting previously unselected package python-ubuntu-sso-client.
Preparing to unpack .../python-ubuntu-sso-client_13.10-0ubuntu11_all.deb ...
Unpacking python-ubuntu-sso-client (13.10-0ubuntu11) ...
Selecting previously unselected package ubuntu-sso-client.
Preparing to unpack .../ubuntu-sso-client_13.10-0ubuntu11_all.deb ...
Unpacking ubuntu-sso-client (13.10-0ubuntu11) ...
Selecting previously unselected package libxapian-1.3-5:i386.
Preparing to unpack .../libxapian-1.3-5_1.3.4-0ubuntu6_i386.deb ...
Unpacking libxapian-1.3-5:i386 (1.3.4-0ubuntu6) ...
Selecting previously unselected package python3-xapian1.3.
Preparing to unpack .../python3-xapian1.3_1.3.4-0ubuntu1_i386.deb ...
Unpacking python3-xapian1.3 (1.3.4-0ubuntu1) ...
Selecting previously unselected package apt-xapian-index.
Preparing to unpack .../apt-xapian-index_0.47ubuntu8_all.deb ...
Unpacking apt-xapian-index (0.47ubuntu8) ...
Selecting previously unselected package gir1.2-gmenu-3.0:i386.
Preparing to unpack .../gir1.2-gmenu-3.0_3.13.3-6ubuntu3_i386.deb ...
Unpacking gir1.2-gmenu-3.0:i386 (3.13.3-6ubuntu3) ...
Selecting previously unselected package python-apt.
Preparing to unpack .../python-apt_1.1.0~beta1build1_i386.deb ...
Unpacking python-apt (1.1.0~beta1build1) ...
Selecting previously unselected package python-bs4.
Preparing to unpack .../python-bs4_4.4.1-1_all.deb ...
Unpacking python-bs4 (4.4.1-1) ...
Selecting previously unselected package python-cairo.
Preparing to unpack .../python-cairo_1.8.8-2_i386.deb ...
Unpacking python-cairo (1.8.8-2) ...
Selecting previously unselected package python-chardet.
Preparing to unpack .../python-chardet_2.3.0-2_all.deb ...
Unpacking python-chardet (2.3.0-2) ...
Selecting previously unselected package python-cups.
Preparing to unpack .../python-cups_1.9.73-0ubuntu2_i386.deb ...
Unpacking python-cups (1.9.73-0ubuntu2) ...
Selecting previously unselected package python-debian.
Preparing to unpack .../python-debian_0.1.27ubuntu2_all.deb ...
Unpacking python-debian (0.1.27ubuntu2) ...
Selecting previously unselected package python-debtagshw.
Preparing to unpack .../python-debtagshw_2.0.1ubuntu6_all.deb ...
Unpacking python-debtagshw (2.0.1ubuntu6) ...
Selecting previously unselected package python-gi.
Preparing to unpack .../python-gi_3.20.0-0ubuntu1_i386.deb ...
Unpacking python-gi (3.20.0-0ubuntu1) ...
Selecting previously unselected package python-gi-cairo.
Preparing to unpack .../python-gi-cairo_3.20.0-0ubuntu1_i386.deb ...
Unpacking python-gi-cairo (3.20.0-0ubuntu1) ...
Selecting previously unselected package python-html5lib.
Preparing to unpack .../python-html5lib_0.999-4_all.deb ...
Unpacking python-html5lib (0.999-4) ...
Selecting previously unselected package python-lxml.
Preparing to unpack .../python-lxml_3.5.0-1build1_i386.deb ...
Unpacking python-lxml (3.5.0-1build1) ...
Selecting previously unselected package python-pam.
Preparing to unpack .../python-pam_0.4.2-13.2ubuntu2_i386.deb ...
Unpacking python-pam (0.4.2-13.2ubuntu2) ...
Selecting previously unselected package python-serial.
Preparing to unpack .../python-serial_3.0.1-1_all.deb ...
Unpacking python-serial (3.0.1-1) ...
Selecting previously unselected package python-xapian.
Preparing to unpack .../python-xapian_1.2.22-2build1_i386.deb ...
Unpacking python-xapian (1.2.22-2build1) ...
Selecting previously unselected package python-xdg.
Preparing to unpack .../python-xdg_0.25-4_all.deb ...
Unpacking python-xdg (0.25-4) ...
Selecting previously unselected package python-piston-mini-client.
Preparing to unpack .../python-piston-mini-client_0.7.5-0ubuntu2_all.deb ...
Unpacking python-piston-mini-client (0.7.5-0ubuntu2) ...
Selecting previously unselected package software-center-aptdaemon-plugins.
Preparing to unpack .../software-center-aptdaemon-plugins_0.1.6build1_all.deb ...
Unpacking software-center-aptdaemon-plugins (0.1.6build1) ...
Selecting previously unselected package python-defer.
Preparing to unpack .../python-defer_1.0.6-2build1_all.deb ...
Unpacking python-defer (1.0.6-2build1) ...
Selecting previously unselected package python-aptdaemon.
Preparing to unpack .../python-aptdaemon_1.1.1+bzr982-0ubuntu14_all.deb ...
Unpacking python-aptdaemon (1.1.1+bzr982-0ubuntu14) ...
Selecting previously unselected package python-aptdaemon.gtk3widgets.
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Unpacking python-aptdaemon.gtk3widgets (1.1.1+bzr982-0ubuntu14) ...
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Unpacking oneconf-common (0.3.9) ...
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Unpacking python-oneconf (0.3.9) ...
Selecting previously unselected package software-center.
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Unpacking software-center (16.01+16.04.20160420) ...
Processing triggers for doc-base (0.10.7) ...
Processing 3 added doc-base files...
Error in `/usr/share/doc-base/xapian-python3-docs', line 9: all `Format' sections are invalid.
Note: `install-docs --verbose --check file_name' may give more details about the above error.
Processing triggers for man-db (2.7.5-1) ...
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Processing triggers for dbus (1.10.6-1ubuntu3) ...
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Rebuilding /usr/share/applications/bamf-2.index...
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Setting up python-dbus (1.2.0-3) ...
Remove stale byte-compiled files...
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Setting up python-httplib2 (0.9.1+dfsg-1) ...
Setting up python-blinker (1.3.dfsg2-1build1) ...
Setting up python-cffi-backend (1.5.2-1ubuntu1) ...
Setting up python-enum34 (1.1.2-1) ...
Setting up python-idna (2.0-3) ...
Setting up python-ipaddress (1.0.16-1) ...
Setting up python-pkg-resources (20.7.0-1) ...
Setting up python-pyasn1 (0.1.9-1) ...
Setting up python-six (1.10.0-3) ...
Setting up python-cryptography (1.2.3-1) ...
Setting up python-jwt (1.3.0-1) ...
Setting up python-oauthlib (1.0.3-1) ...
Setting up python-openssl (0.15.1-2build1) ...
Setting up python-twisted-bin (16.0.0-1) ...
Setting up python-zope.interface (4.1.3-1build1) ...
Setting up python-attr (15.2.0-1) ...
Setting up python-pyasn1-modules (0.0.7-0.1) ...
Setting up python-service-identity (16.0.0-2) ...
Setting up python-twisted-core (16.0.0-1) ...
Setting up python-twisted-web (16.0.0-1) ...
Setting up python-ubuntu-sso-client (13.10-0ubuntu11) ...
Setting up ubuntu-sso-client (13.10-0ubuntu11) ...
Setting up libxapian-1.3-5:i386 (1.3.4-0ubuntu6) ...
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Setting up apt-xapian-index (0.47ubuntu8) ...
apt-xapian-index: Building new index in background...
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Setting up python-apt (1.1.0~beta1build1) ...
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Setting up python-html5lib (0.999-4) ...
Setting up python-lxml (3.5.0-1build1) ...
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Setting up python-xapian (1.2.22-2build1) ...
Setting up python-xdg (0.25-4) ...
Setting up python-piston-mini-client (0.7.5-0ubuntu2) ...
Setting up software-center-aptdaemon-plugins (0.1.6build1) ...
Setting up python-defer (1.0.6-2build1) ...
Setting up python-aptdaemon (1.1.1+bzr982-0ubuntu14) ...
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Setting up software-center (16.01+16.04.20160420) ...
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
Software catalog update was successful.
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for dbus (1.10.6-1ubuntu3) ...
mallick@mallick-desktop:~$ sudo dpkg-reconfigure software-center --force
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
Software catalog update was successful.
mallick@mallick-desktop:~$ sudo update-software-center
No handlers could be found for logger "softwarecenter.db.update"
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
Software catalog update was successful.
mallick@mallick-desktop:~$ sudo apt-get install --reinstall software-center
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
  iucode-tool
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/867 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 215952 files and directories currently installed.)
Preparing to unpack .../software-center_16.01+16.04.20160420_all.deb ...
Unpacking software-center (16.01+16.04.20160420) over (16.01+16.04.20160420) ...
Processing triggers for dbus (1.10.6-1ubuntu3) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu3) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160415-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.59ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up software-center (16.01+16.04.20160420) ...
No handlers could be found for logger "softwarecenter.db.update"
Updating software catalog...this may take a moment.
INFO:softwarecenter.db.pkginfo_impl.aptcache:aptcache.open()
Software catalog update was successful.
mallick@mallick-desktop:~$

Thank you Very much for support.
Thanking and expecting a quick solution from you - Biplab.

So can you open Ubuntu Software Center now?

Sir,

No, it is not opening. When I click on Ubuntu software centre icon, mouse pointer changes to busy mode and after few seconds mouse arrow reappears without any change i.e. Software centre does not get opened.

It is making me puzzled. Please help.

Thanking you,

Biplab.

Could bypass it all and use Synaptic

You have to be aware that in Ubuntu 16.06 the "Software Center" application that existed in all previous Ubuntu releases has been replaced by the "Ubuntu Software" program.

What do you get if you open a terminal window and execute the command

gnome-software

(Note: The package software-center can be manually installed; this is what you did with step 10 of the package management troubleshooting procedure. I assume that the icon that you are clicking is no more for software-center, but for Ubuntu software.)

Sir,

The output is as follows:-

mallick@mallick-desktop:~$ gnome-software

(gnome-software:2527): Gs-WARNING **: failed to open plugin /usr/lib/gs-plugins-9/libgs_plugin_xdg_app_reviews.so: /usr/lib/gs-plugins-9/libgs_plugin_xdg_app_reviews.so: cannot open shared object file: No such file or directory

Thank you very much for your support.

Thanking and expecting a solution from you - Biplab.

Please mark as solved

Sir,
Then, what should I do?
I have to use Synaptic package manager to install application or others, I can not use Ubuntu software center.Please make it clear.
Thanking you,
Biplab.

Does ubuntu-software open when you start it from a terminal window?
The libgs_plugin_xdg_app_reviews.so message is just a warning that should not prevent the program from running.

Thank you all very much.

At last my problem solved.

Thank you once again for active support.

Biplab.