Difference between Linux and OpenBSD

1. Linux :
Linux is a group of open source Unix-like operating systems which was developed by Linus Torvalds. It is a packaged of Linux distribution. Some of the mostly used Linux distribution are Debian, Fedora and Ubuntu. It was basically written in C language and assembly language. Kernel used in Linux is Monolithic kernel. The target systems of Linux distributions are cloud computing, embedded systems, mobile devices, personal computers, servers, mainframe computers and supercomputers. The first version of Linux was launched in 1991.

2. OpenBSD :
OpenBSD is a security focused, free and open source operating system which is provided by The OpenBSD Project. It is based on the Berkeley Software Distribution. It is an Unix-like operating systems. It is available for many platforms including servers, NAS, workstations and embedded systems. It is basically written using C language, assembly language, Perl and Unix shell. The first version of OpenBSD was launched in 1995. The kernel used in this operating system is monolithic.

Difference between Linux and OpenBSD :

S.No.	LINUX	OPENBSD
1.	It was developed by Linus Torvalds.	It was developed by The OpenBSD Project.
2.	It was launched in 1991.	It was launched in 1995.
3.	Its target system types are embedded systems, mobile devices, personal computers, servers, mainframe computers and supercomputers.	Its target system types are server, NAS, workstation and embedded systems.
4.	Computer architectures supported by Linux are IA-32, x86-64, ARM, PowerPC and SPARC.	Computer architectures supported by OpenBSD are IA-32, x86-64, SPARC, 68k, Alpha and VAX.
5.	Its kernel type is Monolithic.	Its kernel type is Monolithic with modules.
6.	Its native APIs are LINUX/POSIX.	Its native APIs are BSD-POSIX.
7.	It has preferred license of GNU GPLv2 (kernel).	It has the preferred license of ISC.
8.	Its package management depends on the distribution.	Its package management is Ports collection/packages.
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.	Its update management depends on the distribution.	Its update management is by source or by binary.
11.	File systems supported by Linux are ext2, ext3, ext4, btrfs, ReiserFS, FAT, ISO 9660, UDF and NFS.	File systems supported by OpenBSD are ffs, ext2, FAT, ISO 9660 and NFS.