Run the following commands in a terminal to remove existing Flash files:

sudo apt-get remove -y –purge flashplugin-nonfree gnash gnash-common mozilla-plugin-gnash swfdec-mozilla libflashsupport nspluginwrapper
sudo rm -f /usr/lib/mozilla/plugins/*flash*
sudo rm -f ~/.mozilla/plugins/*flash*
sudo rm -f /usr/lib/firefox/plugins/*flash*
sudo rm -f /usr/lib/firefox-addons/plugins/*flash*
sudo rm -rfd /usr/lib/nspluginwrapper
sudo rm -rf /usr/lib/flashplugin*

Then run the following command to install the correct version of Flash:

sudo apt-get install flashplugin-installer

Unfortunately they were written for use on a strict Unix environment with an outdated version of bash and without the benefit of GNU extensions (I was not the administrator), so they don’t currently work on Linux. My next step is to port them to Linux, and any help would be appreciated.

Update: I’ve seen some recent traffic to this post, and I wanted to let everyone know that this project has been taken down from GitHub. I didn’t have the time to port it to the GNU/Linux version of Bash, I didn’t really need the scripts anymore (if I did I’d rewrite them in Python, maybe using Fabric), and no one seemed interested in them, so I thought it would be better to take it down than leave a substandard, mostly unusable project on my GitHub profile.