RHCSA1

1、RedhatLinux Introduce

linux What can be done
web The server
DB The server
Mail server
FTP
AI…

linux What are the advantages
Open source ,CLI（ Command line ）, modularization

modularization ： The way between micro kernel and large kernel

Open source license type
Public License ：GPL
Free to copy
Free distribution
Can not be used to close the source of profits
Freely modifiable

Loose license
There are no restrictions on use
No guarantee
Disclosure of original author

redhat Introduce

linux Distribution version
Is an operating system that can be installed . It is composed of kernel and Application
Fedora, personal use , Less stable
RHEL, Enterprise class , Red hat support
CentOS, Community distribution , A large number of open source enterprises linux Code and other sources , Free and easy to install