Having my fresh 26 WS I went to the Fed Set-Up Guides and installed the Gnome Tweak Tools.
Then I went to:
"Fedy - Works with both F25 and F26. A modular and scriptable utility to install codecs and proprietary software, add & manage repos and much more, also saves downloaded files. This will download the script. You then have to open a terminal, "cd" to your downloaded location. Next, "su" as root and type "chmod +x fedy-installer", followed by "./fedy-installer" . That should install Fedy and the necessary repos. Finally, exit root temporarily and type "fedy" to give you a GUI with plenty of handy codecs."
From my terminal:
[jeb@localhost ~]$ cd
jeb@localhost ~]$ su
[root@localhost jeb]# chmod +x fedy-installer ./fedy-installer
chmod: cannot access 'fedy-installer': No such file or directory
chmod: cannot access './fedy-installer': No such file or directory
Perhaps the problem is my interpretation of the sequence in the description as exemplified by my terminal entries.