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。用于个人计算机的最新Linux版本是5.6(内核)。
2. AIX：
AIX是IBM提供的一系列专有操作系统。 AIX代表Advanced Interactive eXecutive。最初，它是为IBM RT PC RISC工作站设计的，后来又用于各种硬件平台，例如IBM RS / 6000系列，基于PowerPC的系统，System-370大型机，PS-2个人计算机和Apple Network Server。它是五个具有The Open Group的UNIX 03标准认证的商业操作系统之一。 AIX的第一个版本于1986年发布。AIX的最新稳定版本是7.2。
Linux和AIX之间的区别：
| LINUX | AIX |
|---|---|
| It was developed by Linus Torvalds. | It was developed by IBM. |
| It was launched in 1991. | It was launched in 1986. |
| Its target system types are embedded systems, mobile devices, personal computers, servers, mainframe computers and supercomputers. | Its target system types are Server, NAS and workstation. |
| Computer architectures supported by Linux are IA-32, x86-64, ARM, PowerPC and SPARC. | Computer architectures supported by AIX are POWER, PowerPC-AS, PowerPC and Power ISA. |
| Kernel used in Linux is Monolithic. | Its kernel type is Monolithic with modules. |
| Its package management depends on the distribution. | Its package management is installp and RPM. |
| Its native APIs are Linux/POSIX. | Its native APIs are SysV/POSIX. |
| It has the preferred license of GNU GPLv2 (kernel). | It has the preferred license Proprietary. |
| Its update management depends on the distribution. | Its update management is Service Update Management Assistant (SUMA). |
| The non-native APIs supported by its subsystems are Mono, Java, Win16 and Win32. | The non-native APIs are not supported by its subsystems. |
| It has default GUI on. | It does not have default GUI on. |
| The file systems supported by Linux are ext2, ext3, ext4, btrfs, ReiserFS, FAT, ISO 9660, UDF and NFS. | The file systems supported by AIX are JFS, JFS2, ISO 9660, UDF, NFS, SMBFS and GPFS. |