[robespierre]

Make sure you understand the procedure for extracting tar archives.

If it is gz compressed, then first do

Code:

gunzip optxeno-mips4.tar.gz

Then extract the (now uncompressed) archive using tar:
(if you are not already root, you should use "su" to become root in order to write the files to the /opt directory)

Code:

su
[enter your root password]
tar xfPp optxeno-mips4.tar
logout