| 1. | It was developed by Linus Torvalds. | It was developed by HP Enterprise. |
| 2. | It was launched in 1991. | It was launched in 1983. |
| 3. | Its target system types are embedded systems, mobile devices, personal computers, servers, mainframe computers and supercomputers. | Its target system types are servers. |
| 4. | Computer architectures supported by Linux are IA-32, x86-64, ARM, PowerPC and SPARC. | Computer architectures supported by HP-UX are PA-RISC and IA-64. |
| 5. | Its kernel type is Monolithic. | Its kernel type is Monolithic with dynamically loadable modules. |
| 6. | Its native APIs are LINUX/POSIX. | Its native APIs are SysV/POSIX. |
| 7. | It has preferred license of GNU GPLv2 (kernel). | It has the preferred license Proprietary. |
| 8. | The non-native APIs supported through its subsystems are Mono, Java, Win16 and Win32. | The non-native APIs are not supported through its subsystems. |
| 9. | Its package management depends on the distribution. | Its package management is SD or swinstall. |
| 10. | Its update management depends on the distribution. | Its update management is SWA (HP-UX Software Assistant)). |
| 11. | File systems supported by Linux are ext2, ext3, ext4, btrfs, ReiserFS, FAT, ISO 9660, UDF and NFS. | File systems supported by HP-UX are VxFS, HFS, CDFS, EVFS, NFS and CIFS. |