CentOS7和CentOS6有何異同之處？

CentOS 7 vs CentOS 6的不同

 (1)桌上型系統

[CentOS6] GNOME 2.x

[CentOS7] GNOME 3.x（GNOME Shell）

(2)檔案系統

#[CentOS6] ext4

[CentOS7] xfs

(3)核心版本

#[CentOS6] 2.6.x-x

[CentOS7] 3.10.x-x

(4)啟動載入器

[CentOS6] GRUB Legacy ( efibootmgr)

[CentOS7] GRUB2

(5)防火牆

#[CentOS6] iptables

[CentOS7] firewalld

##(6)預設資料庫

#[CentOS6] MySQL

[CentOS7] MariaDB

(7)檔案結構

#[CentOS6] /bin, /sbin, /lib, and /lib64在/下

[CentOS7] /bin, /sbin, /lib, and /lib64移到/usr下

(8)主機名稱

#[CentOS6] /etc/sysconfig/network

[CentOS7] /etc/hostname

(9)時間同步

#[CentOS6]

$ ntp

$ ntpq -p

[CentOS7]

$ chrony

$ chronyc sources

#(10)修改時間

[CentOS6]

$ vim /etc/sysconfig/clock

   ZONE="Asia/Tokyo"

   UTC=fales

#$ sudo ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

[CentOS7]

$ timedatectl set-timezone Asia/Tokyo

#$ timedatectl status

(11)修改地區

[CentOS6]

$ vim /etc/sysconfig/i18n

   LANG="ja_JP.utf8"

$ /etc/sysconfig/i18n

$ locale

[CentOS7]

$ localectl set-locale LANG=ja_JP.utf8

$ localectl status

(12)服務相關

1）啟動停止

[CentOS6]

$ service service_name start

$ service service_name stop

##$ service sshd restart/status/reload

[CentOS7]

$ systemctl start service_name

##$ systemctl stop service_name

$ systemctl restart/status/reload sshd

自啟動

[CentOS6]

$ chkconfig service_name on/off

[CentOS7]

$ systemctl enable service_name

$ systemctl disable service_name

服務一覽

[CentOS6]

$ chkconfig --list

[CentOS7]

$ systemctl list-unit-files

$ systemctl --type service

#強制停止

[CentOS6]

$ kill -9

[CentOS7]

$ systemctl kill --signal=9 sshd

#(13)網路

#1）網路資訊

[CentOS6]

$ netstat

$ netstat -I

$ netstat -n

[CentOS7]

$ ip n

$ ip -s l

$ ss

2）IP位址MAC位址

[CentOS6]

$ ifconfig -a

[CentOS7]

$ ip address show

3）路由

[CentOS6]

$ route -n

$ route -A inet6 -n

[CentOS7]

$ ip route show

$ ip -6 route show

##(14)重啟關閉

1）關閉

[CentOS6]

$ shutdown -h now 

#[CentOS7]

$ poweroff

$ systemctl poweroff

2）重啟

[CentOS6]

$ reboot

#$ shutdown -r now

[CentOS7]

$ reboot

#$ systemctl reboot

3）單一用戶模式

[CentOS6]

$ init S

[CentOS7]

$ systemctl rescue

#4）啟動模式

[CentOS6]

[GUICUI]

$ vim /etc/inittab

  id:3:initdefault:

[CUIGUI]

$ startx

[CentOS7]

[GUICUI]

$ systemctl isolate multi-user.target

#[CUIGUI]

$systemctl isolate graphical.target

預設

$ systemctl set-default graphical.target

#$ systemctl set-default multi-user.target

#當前

###$ systemctl get-default######

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