development of linux system
1. What operating system is
an intermediary between man and computer hardware
computer hardware kernel ----- ------ kernel command interpreter shell ----- application
linux development
unix Bell labs was born in
Professor Tan (Gerald Tannebaum)
MINIX
is mainly used for teaching
Stallman
Company: Free Software Foundation
project: GNU
Code: GPL
free software is not free software, recommend everyone can freely use the free dissemination
GNU: invent a substitute unix system
gun.org
excellent software: gawk, bash, gcc, emacs
rules: GPL General public license
1. everyone is free to spread open source software
2. everyone can modify any open source software, but it must publish the modified content
Torvalds
developed a linux kernel
and centos redhat difference of
1. Red Hat charges, centos free
fedora (Beta) === after stable === "redhat ==== remove the logo and billing software ===" centos
Summary
1. Understand the GPL, the GNU
2. focus on understanding and common linux system releases
3. understand the difference and centos redhat and contact