Installation RHEL in External hard disk.

Hi all.

Can i install RHEl5 in a external hard disk, work on lenovo T60 laptop.
Plz reply me. Tell me the process.

I am assuming an external USB drive? If so, check if your BIOS supports booting from a USB drive. If it does, there should not be an issue installing it on an external USB drive and booting from it.

The order of disks may change when moving it between different computers though, which may make finding the correct device to tell grub to boot from tricky.