RHEL 4 makes it quit easy. All you need to do is:
Plug USB pen into drive
Start RedHat Linux Server/Workstation
Put # 1 RHEL CD into CD/DVD Rom
At boot prompt type linux rescue
Code:
boot > linux rescue
It will automatically load USB drivers, SCSI drivers
When prompted to search existing Red Hat partition > select Continue
When you are dropped at rescue shell prompt type following commands to mount USB pen
Code:
mkdir /usb
mount /dev/sdb1 /usb
Replace /dev/sdb1 with your actual device name. Use dmesg | less command to find out what device name it assigned to USB pen
Existing paritions are mounted under /mnt/sysimage so just goto /mnt/sysimage and copy files using cp command
Code:
cp -avr /mnt/sysimage/home/user1 /usb