The error seems to have been thrown by /etc/init.d/cgminer.sh
I can't seem to reproduce it right now. Instead I am getting "-sh: etc/init.d/cgminer: not found" however "less /etc/init.d/cgminer.sh" gives:
It seems you've missed the leading slash before etc, no?
just execute the command:
/etc/init.d/cgminer.sh restart