I've got Flash 11.2 beta in a tar.gz file. I'm new to Linux and I don't know what I'm doing. How can I install it?
Remove the old flash (if necessary)
sudo apt-get purge flashplugin-installer
Extract the contents
tar xvf flashplayer11-2_p3_install_lin_32_122011.tar.gz
Copy the library
sudo cp libflashplayer.so /usr/lib/mozilla/plugins/
.tar.gz part of the filename says that the file is a "Tape ARchive" compressed with
man tar should help.
To view the contents of the archive:
tar tzvf <filename>.tar.gz
And, to extract the files into the current directory:
tar xzvf <filename>.tar.gz
Then, read the files in the extracted directory named in all uppercase, probably called
LICENSE, etc, and follow the directions contained in them.
If you would specify the file you're trying to install, you probably could get more detailed help.