1. Linux：
Linux是由Linus Torvalds开发的一组类似于Unix的开源操作系统。它是Linux发行版的打包。一些最常用的Linux发行版是Debian，Fedora和Ubuntu。它基本上是用C语言和汇编语言编写的。 Linux中使用的内核是Monolithic内核。 Linux发行版的目标系统是云计算，嵌入式系统，移动设备，个人计算机，服务器，大型计算机和超级计算机。 1991年发布了第一个Linux版本。
2. QNX：
QNX是Blackberry Limited提供的商业实时操作系统。它是一个类似Unix的操作系统。此操作系统中使用的内核是微内核。它是第一个商业上成功的微内核操作系统之一。它最初是由Quantum Software Systems开发的，后来被更名为QNX Software Systems。 QNX Sofftware Systems在2010年被BlackBerry Limited收购。QNX的第一个版本于1982年推出。
Linux和QNX之间的区别：
| S.No. | LINUX | QNX |
|---|---|---|
| 1. | It was developed by Linus Torvalds. | It was developed by QNX Software Systems. |
| 2. | It was launched in 1991. | It was launched in 1982. |
| 3. | It is owned by Linus Torvalds. | It is owned by Blackberry Limited. |
| 4. | Its target system types are embedded systems, mobile devices, personal computers, servers, mainframe computers and supercomputers. | Its target system types are automotive, medical, smartphones, consumer, industrial, embedded systems and safety. |
| 5. | Computer architectures supported by Linux are IA-32, x86-64, ARM, PowerPC and SPARC. | Computer architectures supported by QNX are x86, SH-4, PowerPC, ARM and MIPS. |
| 6. | Its kernel type is Monolithic. | Its kernel type is Microkernel. |
| 7. | Its native APIs are LINUX/POSIX. | Its native APIs are POSIX and Java. |
| 8. | It has preferred license of GNU GPLv2 (kernel). | It has the preferred license of Proprietary. |
| 9. | The non-native APIs supported through its subsystems are Mono, Java, Win16 and Win32. | The non-native APIs are not supported through its subsystems. |
| 10. | File systems supported by Linux are ext2, ext3, ext4, btrfs, ReiserFS, FAT, ISO 9660, UDF and NFS. | File systems supported by QNX are QNX4FS, QNX6, ext2, FAT, ISO 9660, Joliet, NFS, CIFS, ETFS, UDF, HFS, HFS+ and NTFS. |