Trying Oracle on Linux in the Enterprise | Linux Journal:

"Linux wins on:

1.

Cost
2.

Cost of the OS
3.

Cost savings from the Intel servers vs. PA-RISC ones
4.

Dynamic kernel changes (no reboot)

HPUX wins on:

1.

Maturity and power of admin tools
2.

Maturity of RAID and fibre card drivers
3.

Repartitioning boot disk (no reboot)
4.

Server cloning software
5.

Easy crash-dumps and remote console access"