Question : how to free disk space on esx 4.1

Hi,
I just installed ESX 4.1 and copied redhat iso image (about 3gb) to /vmimages; then I found / is almost full. then I deleted the iso file from my copy tool Winscp. The issue is the space is not free up.
[root@ESX1 vmimages]# du -h
190M    ./tools-isoimages
2.9M    ./floppies
4.0K    ./images
193M    .
[root@ESX1 vmimages]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdc5             4.9G  4.5G  157M  97% /
/dev/sdb1             1.1G   82M  945M   8% /boot
/dev/sdc2             2.0G   40M  1.8G   3% /var/log

Is there any way to free this 3 gb space?

Thank!

Answer : how to free disk space on esx 4.1

Oh no...not that long :)

Can you reboot the host, if you haven't done so already?

~coolsport00