The Linux kernel was developed by Linus Torvalds in 1991. GNU Project 1. Free software concept free software focuses not on "free", but refers to the concept of "freedom" of software Freedom: Users can freely execute, copy, re-release, learn, modify and strengthen free software
kernel version of Linux 1. Main, minor version is odd: in development version 2. Primary, minor version is even: stable version [[email protected] ~]# uname-r2.6.32-431.el6.x86_642 is the major version number, 6 is the minor version number, 32 is the correction number (the first three refers to the Linus led by the kernel development team developed the system kernel version number), 431 is Red Hat Company on the kernel official website issued by the revision of the kernel version of the revision number, E16 is the Red Hat Linux distribution, representing the Enterprise Linux 6 abbreviation,. x86_64 for 64-bit operating system (indicates your hardware level)
Advantages and Disadvantages of Linux : 1. Stable and efficient. Linux-installed hosts can run for more than a year without shutting down 2. Free or small cost 3. Security, quick fixes for vulnerabilities 4. Multi-tasking, multi-user 5. Planning for users and user groups 6. Relatively non-expendable resources 7. Suitable for operating system with small kernel program 1. No specific support Vendor 2. Lack of support for the game
3. Lack of support for professional software
2. What is Linux in the first chapter?
