root@WLN-SAGER-201208:/home/andrew# apt-get remove oracle-java7-installer
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  oracle-java7-installer
0 upgraded, 0 newly installed, 1 to remove and 9 not upgraded.
1 not fully installed or removed.
After this operation, 82.9 kB disk space will be freed.
Do you want to continue [Y/n]?
(Reading database ... 144378 files and directories currently installed.)
Removing oracle-java7-installer ...
update-alternatives: error: unknown argument `dev'
dpkg: error processing oracle-java7-installer (--remove):
 subprocess installed pre-removal script returned error exit status 2
Downloading...
--2012-08-22 17:05:21--  http://download.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz
Resolving download.oracle.com (download.oracle.com)... 63.110.246.19, 63.110.246.11
Connecting to download.oracle.com (download.oracle.com)|63.110.246.19|:80... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz [following]
--2012-08-22 17:05:21--  https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz
Resolving edelivery.oracle.com (edelivery.oracle.com)... 173.222.254.174
Connecting to edelivery.oracle.com (edelivery.oracle.com)|173.222.254.174|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://download.oracle.com/errors/download-fail-1505220.html [following]
--2012-08-22 17:05:21--  http://download.oracle.com/errors/download-fail-1505220.html
Connecting to download.oracle.com (download.oracle.com)|63.110.246.19|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 5307 (5.2K) [text/html]
Saving to: `./jdk-7u3-linux-x64.tar.gz'

     0K .....                                                 100% 2.80M=0.002s

2012-08-22 17:05:21 (2.80 MB/s) - `./jdk-7u3-linux-x64.tar.gz' saved [5307/5307]

Download done.
sha256sum mismatch jdk-7u3-linux-x64.tar.gz
Oracle JDK 7 is NOT installed.
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 oracle-java7-installer
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@WLN-SAGER-201208:/home/andrew#