Beginners Learn Linux NO. 001 Day notebook basic knowledge

The main learning knowledge:
RHCE
RH033
RH133
RH253
RHCA:
RH401
RH423 (LDAP) does not learn much
RH442
RH436 (Cluster)
RHS333
Mysql

Application Industry:
Operations Engineer, System engineer, System architect, DBA

All later experiments are done in VMware and must be learned to use this virtual machine.


Computer architecture and how it works:
Arithmetic device
Controller
Memory
Input device
Output device

program = instruction + data

Hardware architecture (CPU architecture)
ARM (IP only, design chip, non-production equipment)
X86
X86 or X64
Itanium (Intel acquires HP's CPU)
Alpha HP
UltraSparc Sun
Power IBM (The world's first production of dual-core, four-core, six-core, eight-core, the first to produce ultra-4GHZ CPU)
m68000,m68k Motorola
PowerPC Apple, IBM, Motorola all-in-production

OS (operating system)
Windows
Linux
UNIX is different from UNIX vendors
HP-UX
Solaris
Aix
SCO UNIX
UnixWare, etc.
Os/2

Hardware software layering diagram
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Computer History Linux History

Linux Organizations
GNU:GNU is not Unix provides Linux source code
Gpl:general Public License Common license

Here is the Linux that the publisher compiles the source code into an executable program.
Because they are open source, the software can be freely downloaded to use, so the main profit from the service, that is, if the use of operating system failure, their own processing, need to contact them when the need to collect service charges, according to their needs of different response time charges. You know 650) this.width=650; "src=" Http://cn.qzs.qq.com/qzone/em/e113.gif "alt=" E113.gif "/>
RedHat
Sls
Debian
Suse

RHEL Red Hat Enterprise Linux
CentOS Community Enterprise Operating System
CentOS is the source of Rhelthe product of the re-compilation

This article is from the "techonogy" blog, make sure to keep this source http://wind13cloud.blog.51cto.com/2180779/1850625

Beginners Learn Linux NO. 001 Day notebook basic knowledge