# apt-get install fglrx
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  fglrx-amdcccle
The following NEW packages will be installed:
  fglrx fglrx-amdcccle
0 upgraded, 2 newly installed, 0 to remove and 49 not upgraded.
Need to get 5,079 kB/64.2 MB of archives.
After this operation, 275 MB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://gb.archive.ubuntu.com/ubuntu/ trusty/restricted fglrx-amdcccle amd64 2:13.350.1-0ubuntu2 [5,079 kB]
Fetched 5,079 kB in 1s (4,056 kB/s)
(Reading database ... 175825 files and directories currently installed.)
Preparing to unpack .../fglrx_2%3a13.350.1-0ubuntu2_amd64.deb ...
One or more files have been altered since installation.
Uninstall will not be completed. See /etc/ati/fglrx-uninstall.log for details.
dpkg: error processing archive /var/cache/apt/archives/fglrx_2%3a13.350.1-0ubuntu2_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1
Selecting previously unselected package fglrx-amdcccle.
Preparing to unpack .../fglrx-amdcccle_2%3a13.350.1-0ubuntu2_amd64.deb ...
Unpacking fglrx-amdcccle (2:13.350.1-0ubuntu2) ...
Errors were encountered while processing:
 /var/cache/apt/archives/fglrx_2%3a13.350.1-0ubuntu2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)