How to install Internet Explorer?

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http://ubuntuforums.org – Unfortunately, I need to use IE for some programs, but I am having problems installing it. I am trying to follow this page: https://help.ubuntu.com/community/In...ternetExplorer but when I try Code: sudo aptitude install wine cabextract I get Code: sudo: aptitude: command not found . Do I need to install Aptitude? I am not clear from this page: HTML Code: https://help.ubuntu.com/10.04/serverguide/aptitude.html What is the best way to install IE? I am running Ubuntu 12.04 LTS (Hardware)