Centos6和7的区别

桌面系统

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[CentOS6] GNOME 2.x
[CentOS7] GNOME 3.x(GNOME Shell)

文件系统

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[CentOS6] ext4
[CentOS7] xfs

内核版本

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[CentOS6] 2.6.x-x
[CentOS7] 3.10.x-x

启动加载器

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[CentOS6] GRUB Legacy (+efibootmgr)
[CentOS7] GRUB2

防火墙

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[CentOS6] iptables
[CentOS7] firewalld

默认数据库

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[CentOS6] MySQL
[CentOS7] MariaDB

文件结构

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[CentOS6] /bin, /sbin, /lib, and /lib64在/下
[CentOS7] /bin, /sbin, /lib, and /lib64移到/usr下

主机名

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[CentOS6] /etc/sysconfig/network
[CentOS7] /etc/hostname

时间同步

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[CentOS6]
$ ntp
$ ntpq -p

[CentOS7]
$ chrony
$ chronyc sources

修改时间

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[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

修改地区

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[CentOS6]
$ vim /etc/sysconfig/i18n
LANG="ja_JP.utf8"
$ /etc/sysconfig/i18n
$ locale

[CentOS7]
$ localectl set-locale LANG=ja_JP.utf8
$ localectl status

服务相关

启动停止

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[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

自启动

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[CentOS6]
$ chkconfig service_name on/off

[CentOS7]
$ systemctl enable service_name
$ systemctl disable service_name

服务一览

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[CentOS6]
$ chkconfig --list

[CentOS7]
$ systemctl list-unit-files
$ systemctl --type service

强制停止

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[CentOS6]
$ kill -9 <PID>

[CentOS7]
$ systemctl kill --signal=9 sshd

网络

网络信息

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[CentOS6]
$ netstat
$ netstat -I
$ netstat -n

[CentOS7]
$ ip n
$ ip -s l
$ ss

IP地址MAC地址

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[CentOS6]
$ ifconfig -a

[CentOS7]
$ ip address show

路由

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[CentOS6]
$ route -n
$ route -A inet6 -n

[CentOS7]
$ ip route show
$ ip -6 route show

重启关闭

关闭

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[CentOS6]
$ shutdown -h now

[CentOS7]
$ poweroff
$ systemctl poweroff

重启

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[CentOS6]
$ reboot
$ shutdown -r now

[CentOS7]
$ reboot
$ systemctl reboot

单用户模式

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[CentOS6]
$ init S

[CentOS7]
$ systemctl rescue

启动模式

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[CentOS6]
[GUICUI]
$ vim /etc/inittab
id:3:initdefault:
[CUIGUI]
$ startx

[CentOS7]
[GUICUI]
$ systemctl isolate multi-user.target
[CUIGUI]
$systemctl isolate graphical.target
默认
$ systemctl set-default graphical.target
$ systemctl set-default multi-user.target
当前
$ systemctl get-default

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