pi@raspberrypi ~ $ sudo apt-get install cpufrequtils
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libcpufreq0
The following NEW packages will be installed:
  cpufrequtils libcpufreq0
0 upgraded, 2 newly installed, 0 to remove and 33 not upgraded.
Need to get 53.5 kB of archives.
After this operation, 274 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://mirrordirector.raspbian.org/raspbian/ wheezy/main libcpufreq0 armhf 008-1 [12.9 kB]
Get:2 http://mirrordirector.raspbian.org/raspbian/ wheezy/main cpufrequtils armhf 008-1 [40.6 kB]
Fetched 53.5 kB in 0s (95.8 kB/s)
Preconfiguring packages ...
Selecting previously unselected package libcpufreq0.
(Reading database ... 79463 files and directories currently installed.)
Unpacking libcpufreq0 (from .../libcpufreq0_008-1_armhf.deb) ...
Selecting previously unselected package cpufrequtils.
Unpacking cpufrequtils (from .../cpufrequtils_008-1_armhf.deb) ...
Processing triggers for man-db ...
debconf: DbDriver "templatedb": could not sync /var/cache/debconf/templates.dat-new: Input/output error
dpkg: error processing man-db (--unpack):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 man-db
E: Sub-process /usr/bin/dpkg returned an error code (1)
pi@raspberrypi ~ $ sudo apt-get install cpufrequtils
Reading package lists... Error!
E: Problem parsing dependency Depends
E: Error occurred while processing apache2.2-bin (NewVersion2)
E: Problem with MergeList /var/lib/apt/lists/mirrordirector.raspbian.org_raspbian_dists_wheezy_main_binary-armhf_Packages
E: The package lists or status file could not be parsed or opened.
pi@raspberrypi ~ $