I used
cd /usr/bin
mv cgminer oldcgminer/cgminer
wget http://ck.kolivas.org/apps/cgminer/antminer/s3/4.6.1-141020/cgminer
chmod 755 cgminer
reboot
(the directory "oldcgminer" was created earlier to hold previous versions)
hint to reduce typing errors: (works on Putty with Windows) copy the text that you want to enter, then mouse-left-click in the Putty window to define the insertion point, right-click to paste the text.
Your procedure looks ok as well.
Cheers