If that says that the command isn't found, then try this which will install
tar (I'm assuming you're using Ubuntu):
sudo apt-get install tar
If it says that it can't find the file (i.e. it can't find foo.tar.gz) then perhaps you're in the wrong directory. Do you know how to list the contents of directories and change to another directory?
tar-xwzf flashplayer_10_plugin_debug.tar.gz bash: tar-xwzf: command not found
Is what it says. I do have tar though!
I tried this too but clearly I need help with directories.
tar -xzvf flashplayer_10_plugin_debug.tar.gz tar: flashplayer_10_plugin_debug.tar.gz: Cannot open: No such file or directory
I might add that when folder options come up in Archive Manager, several files on the desktop are not available.
Bev.