Question : Increase Filesystem Size of RHEL 5

What is the best command to use to increase the size of my "/" filesystem?  I would like to increase this by at least 5gb.   I know I have at least 9gb of unused space on the disk.  Below is my lvm and df.

Last login: Fri May  7 12:59:05 2010
[root@RHEL01 ~]# lvm vgdisplay
  --- Volume group ---
  VG Name               VolGroup00
  System ID            
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               66.84 GB
  PE Size               32.00 MB
  Total PE              2139
  Alloc PE / Size       1834 / 57.31 GB
  Free  PE / Size       305 / 9.53 GB
  VG UUID               VwKiiz-XKX1-b2iA-X7dc-TkK9-EijI-VcMsKh
   
[root@RHEL01 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       48G   31G   15G  69% /
/dev/sda1             190M   13M  168M   8% /boot
tmpfs                 7.9G     0  7.9G   0% /dev/shm
[root@RHEL01 ~]#

Answer : Increase Filesystem Size of RHEL 5

no reboot needed:
(resize to add additional 3GB)
- lvresize -L+3G /dev/mapper/VolGroup00-LogVol00
- resize2fs  /dev/mapper/VolGroup00-LogVol00 (for ext234-FS)
- xfs_growfs / (for xfs filesystem)