Week 5: course content
of the primary part of the overall knowledge:
two days retrospective knowledge
network of Linux
Linux process management
iptables of Linux security
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System Basis:
1, three members
CPU: arithmetic memory controller
1 + 1 = 2 times space
interrupts
the memory: the CPU data from the read only memory, and a volatile memory data (page Page)
the IO: Control bus data bus (a IO, the developer is called)
2, OS principle
Figure
Note: What operating system?
3, OS management
GUI - graphical KDE XFCE the GNOME
CLI - Command Line Interface shell
common shell program
SH - bash
csh
tcsh
ksh
zsh
CAT / etc / shells
4, call the
System Call
API
5, historical knowledge of the operating system
see the blog
6, the open-source system
GNU - GPL
loose GPL agreement
the Apache
BSD
7, Linux version of Common Publishers