hi everbody,

I am using redhat9. I kept swap partition 1.50GB at the time of installation. Now i want to resize this partition to 500MB from 1.50GB. what should i do.

thanks in advance

First, decide whether you should decrease the size from the front end so that the free space can be added to the preceding partition, or decrease the size from the backend to add the free space the the partition after the swap partition.

Then use cfdisk to resize the swap partition, and add the free space to another partition.

Important note: it would be advisable to close all applications currently running which may have files in swap space (perhaps open a terminal window and issue the command 'init S' to get to single user mode). That way, you can assure that you don't loose data in swap space. Then run cfdisk to resize the swap partition.

I imagine you would need to umount the swap partition as well
before doing anything, maybe

First you need to do a
This will disable swap spaces listed in fstab. Then use a tool like parted to resize the partition.
This is your choice to select the tool. parted is available in RH/Fedora systems by default.

After you resize the partition then
Here replace hda4 with the name of your swap partition device. Then
If you did was resize this would work. But if your editing changed the device name, you might have to change the /etc/fstab.

All these can usually be done without the need of rebooting and without changing runlevels.