I am not sure what to do but I had removed some applications like Firefox which had 9+ MB and there was another supporting application from Mozilla for firefox that was 28MB so I removed them both.

I also removed the Go To Viewer (Document Viewer) software which was taking about 9MB or so.

However, when I checked the space in rootfs at the command line it still showed that the free space was only 23MB as before... and actually it was a few 100kb lesser after I performed these uninstallations.

When I checked it with Disk Checker utility, it also showed the same 22.4 MB free space left.

As I was reading to update software from command line by following the Flasher 3.5 update so I forgot about the checking disk space and followed the instructions given here

http://maemo.nokia.com/n900/tips/software-update/

It says switch of your N900 then press and hold the "U" key on the device and connect the device with USB to the PC. I did that and it says as long as you can see the USB cable on the top right hand side screen of your device it means the phone is in flashing mode. As I saw the USB Icon on the top right hand side of my N900 screen I have run the commands.

In the center it also shows the NOKIA name while it shows the USB on the top right hand corner.

The instructions say after 4min it should re-start your phone with an updated firmware. However, its been more than 4 mins and on the screen it still has NOKIA name in the middle and the USB icon on the top right hand corner.

It hasn't restarted yet. So what do I do now if it remains the same after a few more mins?