Partition exchange
 

root]# df -lah
Filesystem Size Used Avail Use% Mounted on
/dev/hda1 289M 266M 8.0M 98% /
none 0 0 0 - /proc
usbdevfs 0 0 0 - /proc/bus/usb
/dev/hda3 19G 720M 17G 4% /data1
/dev/hda2 19G 192M 18G 2% /data2
none 0 0 0 - /dev/pts
/dev/hda5 4.8G 220M 4.3G 5% /home
none 440M 0 440M 0% /dev/shm
/dev/hda6 4.8G 33M 4.5G 1% /tmp
/dev/hda9 15G 4.1G 10G 28% /usr
/dev/hda7 4.8G 335M 4.2G 8% /var
none 0 0 0 - /proc/sys/fs/binfmt_misc

What are the command steps to exchange my root partition for my tmp to
gain more root space?
Thanks

-- Please disregard ---

This could get a bit tricky, so use caution!!

Backup your /etc/fstab as fstab.bak or similar.

Instead of detaching /tmp from /dev/hda6 _live_, I would suggest removing the line that mounts /tmp from /etc/fstab. And reboot. ( If you are really brave, you can try umount /tmp rightaway )

Either way, now is the time to copy the contents of your root partition to your would-be root partition. I would choose to do it one MEG of data ( 1024*1024 bytes ) at a time.
dd if=/dev/hda1 of=/dev/hda6 bs=1048576

After mirroring, you can mount /dev/hda6 under a test directory and see if the contents are intact.

Now edit your / mountpoint on /etc/fstab and replace your root device with /dev/hda6.
mount -a -o remount
to remount all filesystems. If you use the RH mount version, you may have to use -O instead of -o, I cant remember.

Now, if everything works fine, you can mke2fs /dev/hda1 before placing it under /tmp in fstab.

Good Luck.