q@www:~ $ sudo apt-get install fail2ban 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  python-pyinotify whois
Suggested packages:
  python-gamin mailx python-pyinotify-doc
The following NEW packages will be installed:
  fail2ban python-pyinotify whois
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 256 kB of archives.
After this operation, 904 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
Get:1 http://mirrordirector.raspbian.org/raspbian/ jessie/main whois armhf 5.2.7 [64.0 kB]
Get:2 http://mirrordirector.raspbian.org/raspbian/ jessie/main fail2ban all 0.8.13-1 [165 kB]
Get:3 http://mirrordirector.raspbian.org/raspbian/ jessie/main python-pyinotify all 0.9.4-1 [26.4 kB]
Fetched 256 kB in 1s (173 kB/s)        
Selecting previously unselected package whois.
dpkg: warning: files list file for package 'libicu52:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python3-debian' missing; assuming package has no files currently installed
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dpkg: warning: files list file for package 'xdg-user-dirs' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libfluidsynth1:armhf' missing; assuming package has no files currently installed
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dpkg: warning: files list file for package 'adduser' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libparams-util-perl' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python3-setuptools' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'binutils' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python3-pgzero' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python-pygame' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libetpan17:armhf' missing; assuming package has no files currently installed
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dpkg: warning: files list file for package 'libcanberra-gtk3-0:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'liblocale-gettext-perl' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python3-requests' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'zenity-common' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libhsqldb1.8.0-java' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libofa0' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'openssl' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libmtdev1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libgcc-4.9-dev:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libasan1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libldap-2.4-2:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'autotools-dev' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'lxde-common' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libpolkit-backend-1-0:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'init-system-helpers' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'sensible-utils' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'pkg-config' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'lua5.1' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libopencv-video2.4:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libdevmapper-event1.02.1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libgoa-1.0-0b:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libxslt1.1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'coinor-libcoinmp1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'lsb-base' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libdrm2:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libgphoto2-port10:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libxvidcore4:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'parted' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'glib-networking-services' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'python2.7' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'dbus-x11' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libsystemd0:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'raspberrypi-bootloader' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libudisks2-0:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'coinor-libcbc3' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libxshmfence1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libxss1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libcurl3-gnutls:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libvisio-0.1-1' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libtag1c2a:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libgtop2-7' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'mime-support' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'pypy-upstream' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libreoffice-java-common' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'xserver-common' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'bluej' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libmwaw-0.3-3' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libexpat1:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libraptor2-0:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'gsfonts-x11' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libisccc90' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'libplist2:armhf' missing; assuming package has no files currently installed
dpkg: warning: files list file for package 'coinor-libcoinutils3' missing; assuming package has no files currently installed
(Reading database ... 85713 files and directories currently installed.)
Preparing to unpack .../archives/whois_5.2.7_armhf.deb ...
Unpacking whois (5.2.7) ...
Selecting previously unselected package fail2ban.
Preparing to unpack .../fail2ban_0.8.13-1_all.deb ...
Unpacking fail2ban (0.8.13-1) ...
Selecting previously unselected package python-pyinotify.
Preparing to unpack .../python-pyinotify_0.9.4-1_all.deb ...
Unpacking python-pyinotify (0.9.4-1) ...
dpkg: error processing archive /var/cache/apt/archives/python-pyinotify_0.9.4-1_all.deb (--unpack):
 unable to install new info file `/var/lib/dpkg/tmp.ci/md5sums' as `/var/lib/dpkg/info/python-pyinotify.md5sums': Input/output error
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for systemd (215-17+deb8u2) ...
Errors were encountered while processing:
 /var/cache/apt/archives/python-pyinotify_0.9.4-1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)