I copied the script as optimzie.sh. I ran following
1. sudo gainroot
2. sh optimize.sh

It ran, but saw following error message

optimize.sh: line 1: : not found
killall: osso_calculator: no process killed
killall: cannot kill pid 2630: no such process
killall:mafw-gst-renderere: no process killed
Your Nokia N900 is now optimized:

I am editing the file with "notes" on n900. I removed all comments and first line !/bin/sh etc

It has these entries
begin of script
killall pulseaudio
killall trackered
killall browser browserd
killall Calendar
killall oss9_calculator
..
...
echo your Nokia N900 is now optimized
END of script

Do you know any problem in my script?

Any clue on what could be the problem.