okular packages hash sum mismatch?

Try switching from the Indian country repository server to another server in your vicinity, or eventually to the central repository server.

Also, try:

cd $HOME
wget https://dl.dropbox.com/u/8850924/fixpackage
chmod +x ./fixpackage
sudo ./fixpackage

hope that helps.

Changed country to main & runned fixpackage but still

Fetched 54.4 MB in 1min 50s (493 kB/s)
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/d/docbook-xsl/docbook-xsl_1.78.1+dfsg-1_all.deb Hash Sum mismatch

E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb Hash Sum mismatch

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

What do you get for the commands (to be executed in a terminal window)

wget http://archive.ubuntu.com/ubuntu/pool/main/d/docbook-xsl/docbook-xsl_1.78.1+dfsg-1_all.deb
ls -l docbook-xsl_1.78.1+dfsg-1_all.deb
file docbook-xsl_1.78.1+dfsg-1_all.deb

$ ls -l docbook-xsl_1.78.1+dfsg-1_all.deb
-rw-rw-r-- 1 ganesh ganesh 2146476 May 27 2013 docbook-xsl_1.78.1+dfsg-1_all.deb

$ file docbook-xsl_1.78.1+dfsg-1_all.deb
docbook-xsl_1.78.1+dfsg-1_all.deb: Debian binary package (format 2.0)

Do you still get the same error message when you try installing updates?

If yes, you could try installing the package that you downloaded.

sudo dpkg --install docbook-xsl_1.78.1+dfsg-1_all.deb

What do you get as results?

Selecting previously unselected package docbook-xsl.
(Reading database ... 309652 files and directories currently installed.)
Preparing to unpack docbook-xsl_1.78.1+dfsg-1_all.deb ...
Unpacking docbook-xsl (1.78.1+dfsg-1) ...
dpkg: error processing archive docbook-xsl_1.78.1+dfsg-1_all.deb (--install):
 cannot copy extracted data for './usr/share/doc/docbook-xsl/BUGS' to '/usr/share/doc/docbook-xsl/BUGS.dpkg-new': unexpected end of file or stream
Errors were encountered while processing:
 docbook-xsl_1.78.1+dfsg-1_all.deb

Ok, now try again

rm docbook-xsl_1.78.1+dfsg-1_all.deb
wget http://archive.ubuntu.com/ubuntu/pool/main/d/docbook-xsl/docbook-xsl_1.78.1+dfsg-1_all.deb
ls -l docbook-xsl_1.78.1+dfsg-1_all.deb
sudo dpkg --install docbook-xsl_1.78.1+dfsg-1_all.deb

and report the results.

rm docbook-xsl_1.78.1+dfsg-1_all.deb

 wget http://archive.ubuntu.com/ubuntu/pool/main/d/docbook-xsl/docbook-xsl_1.78.1+dfsg-1_all.deb

ls -l docbook-xsl_1.78.1+dfsg-1_all.deb
-rw-rw-r-- 1 ganesh ganesh 2146476 May 27 2013 docbook-xsl_1.78.1+dfsg-1_all.deb

sudo dpkg --install docbook-xsl_1.78.1+dfsg-1_all.deb
(Reading database ... 309652 files and directories currently installed.)
Preparing to unpack docbook-xsl_1.78.1+dfsg-1_all.deb ...
Unpacking docbook-xsl (1.78.1+dfsg-1) ...
dpkg: error processing archive docbook-xsl_1.78.1+dfsg-1_all.deb (--install):
 cannot copy extracted data for './usr/share/doc/docbook-xsl/BUGS' to '/usr/share/doc/docbook-xsl/BUGS.dpkg-new': unexpected end of file or stream
Errors were encountered while processing:
 docbook-xsl_1.78.1+dfsg-1_all.deb

Ok, the same error.

Now try this (which installs the version for Ubuntu 16.04)

rm docbook-xsl_1.78.1+dfsg-1_all.deb
wget https://launchpad.net/ubuntu/+archive/primary/+files/docbook-xsl_1.79.1+dfsg-1_all.deb
sudo dpkg --install docbook-xsl_1.79.1+dfsg-1_all.deb

sudo dpkg --install docbook-xsl_1.79.1+dfsg-1_all.deb

It install perfectly but sill while installing okular i'm getting below error

Get:1 http://in.archive.ubuntu.com/ubuntu/ trusty-updates/universe kde-runtime-data all 4:4.13.3-0ubuntu0.2 [6,813 kB]
Fetched 6,813 kB in 6s (999 kB/s)
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb Hash Sum mismatch

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

That "hash sum mismatch" is strange and should not show up. Maybe the following provides an indication what and where the cause might be:

Try the following commands:

sudo rm /var/cache/apt/archives/kde-runtime-data_*.deb
sudo rm /var/cache/apt/archives/partial/*
sudo apt-get --download-only install kde-runtime-data
md5sum /var/cache/apt/archives/kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb
grep "Package: kde-runtime-data" /var/lib/apt/lists/*_trusty-updates_universe_binary* -a17

and copy/paste all output into this question document.

(remark: on my system the md5 value is 982b1a1f373e7bead45c236e3f60a5e4)

sudo rm /var/cache/apt/archives/kde-runtime_4%3a4.13.3-0ubuntu0.2_amd64.deb

ls /var/cache/apt/archives/partial/
docbook-xsl_1.78.1+dfsg-1_all.deb.FAILED kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

sudo rm /var/cache/apt/archives/partial/*

sudo apt-get --download-only install kde-runtime-data
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  kde-runtime-data
0 upgraded, 1 newly installed, 0 to remove and 10 not upgraded.
Need to get 6,813 kB of archives.
After this operation, 12.8 MB of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu/ trusty-updates/universe kde-runtime-data all 4:4.13.3-0ubuntu0.2 [6,813 kB]
Fetched 6,813 kB in 7s (863 kB/s)
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb Hash Sum mismatch

E: Some files failed to download

md5sum /var/cache/apt/archives/kd
kdelibs5-data_4%3a4.13.3-0ubuntu0.3_all.deb kdelibs-bin_4%3a4.13.3-0ubuntu0.3_amd64.deb
kdelibs5-plugins_4%3a4.13.3-0ubuntu0.3_amd64.deb kdoctools_4%3a4.13.3-0ubuntu0.3_amd64.deb

failed above command as it is unable to download kde-runtime-data

grep "Package: kde-runtime-data" /var/lib/apt/lists/*_trusty-updates_universe_binary* -a17
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Recommends: virtuoso-minimal, udisks2, upower, kubuntu-debug-installer, icoutils, libcanberra-pulse, nepomuk-core-runtime
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Suggests: djvulibre-bin, finger
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Conflicts: kdelibs4-dev
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Breaks: kde-runtime-data (<< 4:4.10.80), kde-workspace-bin (<< 4:4.9.95), kdebase-runtime (<< 4:4.7.2), kdebase-runtime-bin-kde4, kdebase-workspace-bin (<< 4:4.6), kdebluetooth (<< 1.0~beta7-1), kdelibs5-plugins (<< 4:4.5), nepomukcontroller, plasma-active (<< 3.0-0ubuntu2~), plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Filename: pool/universe/k/kde-runtime/kde-runtime_4.13.3-0ubuntu0.2_amd64.deb
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Size: 1717462
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-MD5sum: 30dc49a945850617a9e139e2c193e005
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-SHA1: 0653e325d19febb03f50e8f37f8569f4281d423e
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-SHA256: f9b199c0579d6c2fe42c82a04ea7f5e8c18ecc3a05c7f64072e2b8773bf30761
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Description: runtime components from the official KDE release
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Homepage: http://www.kde.org/
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Description-md5: bc084f747944595b9192627383330355
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Bugs: https://bugs.launchpad.net/ubuntu/+filebug
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Origin: Ubuntu
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Supported: 5y
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Task: kubuntu-desktop, kubuntu-active, kubuntu-active-desktop, kubuntu-active, edubuntu-desktop-gnome, ubuntustudio-video, ubuntustudio-graphics
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages:Package: kde-runtime-data
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Priority: optional
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Section: universe/kde
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Installed-Size: 12469
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Maintainer: Kubuntu Developers <email address hidden>
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Original-Maintainer: Debian Qt/KDE Maintainers <email address hidden>
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Architecture: all
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Source: kde-runtime
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Version: 4:4.13.3-0ubuntu0.2
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Replaces: kcontrol, kde-runtime (<< 4:4.10.80), kde-workspace-bin (<< 4:4.10), kdebase-bin-kde3, kdebase-kio-plugins, kdebase-runtime (<< 4:4.6.80), kdebase-runtime-data, kdebase-runtime-data-common, kdebase-workspace-bin (<< 4:4.5.95), kdelibs5-data (<< 4:4.5), kdelibs5-dev (<< 4:4.5), nepomukcontroller, plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80), plasma-widget-networkmanagement (<< 0.1+git20110422.810bc16-1+)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Depends: perl
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Breaks: kcontrol, kde-runtime (<< 4:4.10.80), kde-workspace-bin (<< 4:4.10), kdebase-bin-kde3, kdebase-kio-plugins, kdebase-runtime (<< 4:4.6.80), kdebase-runtime-data, kdebase-runtime-data-common, kdebase-workspace-bin (<< 4:4.5.95), kdelibs5-data (<< 4:4.5), kdelibs5-dev (<< 4:4.5), nepomukcontroller, plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80), plasma-widget-networkmanagement (<< 0.1+git20110422.810bc16-1+)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Filename: pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Size: 6813178
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-MD5sum: 982b1a1f373e7bead45c236e3f60a5e4
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-SHA1: 7ca1c4568f5044ea27759fab23b4aa1114bf8c03
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-SHA256: 6a3b1ec1c0571100d9f5fc53ab8a425755cd754afd289447b820e93c516c601a
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-amd64_Packages-Description: shared data files for the KDE base runtime module
--
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Recommends: virtuoso-minimal, udisks2, upower, kubuntu-debug-installer, icoutils, libcanberra-pulse, nepomuk-core-runtime
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Suggests: djvulibre-bin, finger
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Conflicts: kdelibs4-dev
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Breaks: kde-runtime-data (<< 4:4.10.80), kde-workspace-bin (<< 4:4.9.95), kdebase-runtime (<< 4:4.7.2), kdebase-runtime-bin-kde4, kdebase-workspace-bin (<< 4:4.6), kdebluetooth (<< 1.0~beta7-1), kdelibs5-plugins (<< 4:4.5), nepomukcontroller, plasma-active (<< 3.0-0ubuntu2~), plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Filename: pool/universe/k/kde-runtime/kde-runtime_4.13.3-0ubuntu0.2_i386.deb
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Size: 1715666
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-MD5sum: 43d8fab113b0985bb7dac78dfd535747
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-SHA1: eb0f3404fb42e581bd925836f7584c7f289090fd
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-SHA256: f66b74d5a5cc5392d7972d1e3df6aade7b9cc81c3642048a5f0ea88fb409f815
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Description: runtime components from the official KDE release
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Homepage: http://www.kde.org/
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Description-md5: bc084f747944595b9192627383330355
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Bugs: https://bugs.launchpad.net/ubuntu/+filebug
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Origin: Ubuntu
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Supported: 5y
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Task: kubuntu-desktop, kubuntu-active, kubuntu-active-desktop, kubuntu-active, edubuntu-desktop-gnome, ubuntustudio-video, ubuntustudio-graphics
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages:Package: kde-runtime-data
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Priority: optional
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Section: universe/kde
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Installed-Size: 12469
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Maintainer: Kubuntu Developers <email address hidden>
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Original-Maintainer: Debian Qt/KDE Maintainers <email address hidden>
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Architecture: all
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Source: kde-runtime
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Version: 4:4.13.3-0ubuntu0.2
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Replaces: kcontrol, kde-runtime (<< 4:4.10.80), kde-workspace-bin (<< 4:4.10), kdebase-bin-kde3, kdebase-kio-plugins, kdebase-runtime (<< 4:4.6.80), kdebase-runtime-data, kdebase-runtime-data-common, kdebase-workspace-bin (<< 4:4.5.95), kdelibs5-data (<< 4:4.5), kdelibs5-dev (<< 4:4.5), nepomukcontroller, plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80), plasma-widget-networkmanagement (<< 0.1+git20110422.810bc16-1+)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Depends: perl
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Breaks: kcontrol, kde-runtime (<< 4:4.10.80), kde-workspace-bin (<< 4:4.10), kdebase-bin-kde3, kdebase-kio-plugins, kdebase-runtime (<< 4:4.6.80), kdebase-runtime-data, kdebase-runtime-data-common, kdebase-workspace-bin (<< 4:4.5.95), kdelibs5-data (<< 4:4.5), kdelibs5-dev (<< 4:4.5), nepomukcontroller, plasma-netbook (<< 4:4.5.95), plasma-scriptengine-declarative, plasma-scriptengine-javascript (<< 4:4.6.80), plasma-widget-networkmanagement (<< 0.1+git20110422.810bc16-1+)
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Filename: pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Size: 6813178
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-MD5sum: 982b1a1f373e7bead45c236e3f60a5e4
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-SHA1: 7ca1c4568f5044ea27759fab23b4aa1114bf8c03
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-SHA256: 6a3b1ec1c0571100d9f5fc53ab8a425755cd754afd289447b820e93c516c601a
/var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_trusty-updates_universe_binary-i386_Packages-Description: shared data files for the KDE base runtime module

Ok, now what is the output of

md5sum /var/cache/apt/archives/partial/kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

It seems that you have a certain problem in your internet connection, such that certain files get broken during download.

md5sum /var/cache/apt/archives/partial/kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
3b609364246643f62f11cdd7eed2a957 /var/cache/apt/archives/partial/kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

I have proper internet connection.

The md5sum command gives the wrong result, which is an indication that the file got broken during transfer.

For further diagnostics try the following:

cd /var/cache/apt/archives/partial/
sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

This will show whether the problem/error is consistent or not (always the same wrong md5 value or different ones).

sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
3b609364246643f62f11cdd7eed2a957 kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
3b609364246643f62f11cdd7eed2a957 kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

sudo rm kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
sudo apt-get --download-only install kde-runtime-data
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED
3b609364246643f62f11cdd7eed2a957 kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb.FAILED

You could force install the deb, or switch to a different package source

wget http://mirror.cse.iitk.ac.in/ubuntu/pool/universe/k/kde-runtime/kde-runtime-data_4.13.3-0ubuntu0.2_all.deb
md5sum kde-runtime-data_4%3a4.13.3-0ubuntu0.2_all.deb
982b1a1f373e7bead45c236e3f60a5e4 kde-runtime-data_4.13.3-0ubuntu0.2_all.deb

Finally okular installed and working properly.

Thanks Manfred Hampl, that solved my question.