Introduction to Linux Systems

"Introduction to Linux systems, installation of RHEL7 systems, RHEL7 basic Operations"

UNIX end of 1969, 1970-1-1
1973, C Speech rewrite Unix
Linuxlinus Torwalds
October 1991, version 0.02 kernel
March 1994, Version 1.0 kernel
Linux version
Red Hat\suse\debian\ubentu
Red Hat Series
RHEL, Red Hat Enterprise Board
CentOS, Red Hat Community Enterprise Edition
Fedora Core, Red Hat Community Edition
Application of Linux
Enterprise Servers, embedded systems, high-performance large-scale operations

Partitions: mbr:1~4 partitions, generally, 3 primary partitions + one extended partition (logical partition Within)

/devdevice, device Files directory
HD, represents the IDE device,/HDA1---IDE interface 1th HDD 1th primary partition
SD, the 1th hard drive 1th logical partition that represents the SCSI device,/SDA5--SCSI interface

EXT4---Small file read fast, large file slow, RHEl6 system default
XFS-----Large files Fast, RHEL7 system default
Swap swap space (virtual memory)

Introduction to Linux Systems