13. Linux System version

Linux various versions

(like the kernel, the software, probably the configuration file is not the same)
History is as follows
Redhat Fee System: Service charge, but system does not charge
Sls
Debian is a Debian Project founder Ian Murdock and his wife Debra initials
The only non-business organization, maintenance is the network of talent, so in advanced users run, advanced users more use.
Three graduate students from SUSE Germany, formerly SLS
Linux Publishers: Release
In fact, the kernel of each system, like software, may be the configuration file is not the same
Example: Ubuntu network configuration files and CentOS configuration files are different.
One in/etc/sysconfig/network-scripts/ifcfg-eth0
And Ubuntu is in the open Ubuntu/etc/network/interfaces, and the format is a little different

OpenSource OpenBSD: Open source
Free FreeBSD: Free access, free modification, free learning
Gpl:general Public License
Look uncomfortable. Redhat Fee: Redhat revenue Source (open source program, but do not publish patches to meet charges), there is also a large source of training institutions
Centos: Community Enterprise Operating system once said the community is open to the meaning
Community Enterprose OS, this is fully compatible with Redhat, so the CentOS for redhat charges appears

Personal version of the system: Version 9.0 is a personal version (like the enterprise system is the highest is 7.0), Redhat in 2003 discontinued the personal version, sold to Fedora: Let it update the version
Fedora: Is the Enterprise Test application environment is more, belonging to the enterprise version of the test system
Mandriva: The Desktop is beautiful
All three types are derived from the Redhat version.
1. One is looking uncomfortable redhat charges, CentOS
2. One is the desktop version, later developed into Enterprise version of the test system, performance is stable, Fedora
3. Desktop version, desktop is very beautiful
Ubuntu is a Debian-based development
Ubuntu is the main tone is green, but the majority of domestic enterprises are CentOS server. Learning CentOS is the best
Ubuntu is a desktop version, so a lot of notebook preinstalled software may be the Ubuntu system
Linux is the kernel, so the kernel is a version of 0.1,0.21,2.0 ...
91 is the 0.1 version.
Rhel Release version: 3.0,4.0,5.0,6.0,7.0
But they're all Linux at the core.

           Linux  min     Redhat   fedora                大蜥蜴 suse       fedora

Ubuntu Centos Debian
RedHat, Fedora, SUSE, Slackware, Debian, Ubuntu, CentOS, Redflag, etc.
Android Core is also Linux, but is the Java program under the interface (Linux+jvm+java program)
So far, Linux is only 20-somethings.

The ks=http://172.16.0.1/class.cfg of KS is
Specify the kickstart file, which is described later in the PXE automation installation system, and this kickstart file is required to complete the automated installation implementation.

www.kernel.org kernel version of the version number to see the URL, is also the official website
Check out the latest version of the latest kernel, www.kernel.org used to know
List the relationships between Linux distributions and the Linux kernel
Lniux release, Gun:gun/linux.
Source code: Must be compiled to run, so the release is already the source code has been compiled to complete the things, together, formed a distribution, the mainstream of the three major distributions: Fedora: It provides redhat for the desktop version, enterprise testing is mostly used.
Release version
1.Redhat (Centos)
2.SUSE (the best-looking Enterprise Edition is SUSE)
3.Debian (Ubuntu belongs to the Debian distribution, Mint), the most difficult to use, to make the least limit, the master with.

Gpl,bsd,apache of the three open source agreements and their differences
1. Free software, copyright description: But it's still copyrighted.
2. Open source Agreement, copyright description

Gentoo
LFS (Linux from scratch starting line) Strictly speaking, LFS is not a distribution, but a book.
teach you to compile Linux and find software components. There are not many people on the market who play LFS, if you can this, you can fully understand the Linux ~

Question: What does compiling mean (what does compiling mean)?

is to turn the source code into a binary code that can be executed on the CPU.
The Redhat release is already compiled and is compiled in a common format (compiled on older CPUs, compatible with older versions).
If we want to play the performance of a program, on this platform, such as the Redhat on the compilation, on this platform to install the configuration. Will play a better role in program performance
So compile and compile their own good, the advantage is that you can better play the CPU features, but also more trouble, time is longer, and compiled good, is relatively simple.

13. Linux System version