CentOS 7 与 CentOS 6的不同

CentOS 7 vs CentOS 6的不同 (1)桌面系统 [CentOS6] GNOME 2.x [CentOS7] GNOME 3.x（GNOME Shell）

(2)文件系统 [CentOS6] ext4 [CentOS7] xfs

(3)内核版本 [CentOS6] 2.6.x-x [CentOS7] 3.10.x-x

(4)启动加载器 [CentOS6] GRUB Legacy (+efibootmgr) [CentOS7] GRUB2

(5)防火墙 [CentOS6] iptables [CentOS7] firewalld

(6)默认数据库 [CentOS6] MySQL [CentOS7] MariaDB

(7)文件结构 [CentOS6] /bin, /sbin, /lib, and /lib64在/下 [CentOS7] /bin, /sbin, /lib, and /lib64移到/usr下

(8)主机名 [CentOS6] /etc/sysconfig/network [CentOS7] /etc/hostname

(9)时间同步 [CentOS6] $ ntp $ ntpq -p

[CentOS7] $ chrony $ chronyc sources

(10)修改时间 [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)修改地区 [CentOS6] $ vim /etc/sysconfig/i18n LANG="ja_JP.utf8" $ /etc/sysconfig/i18n $ locale

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

(12)服务相关

1）启动停止 [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

自启动 [CentOS6] $ chkconfig service_name on/off

[CentOS7] $ systemctl enable service_name $ systemctl disable service_name

服务一览 [CentOS6] $ chkconfig --list

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

强制停止 [CentOS6] $ kill -9 <PID>

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

(13)网络

1）网络信息 [CentOS6] $ netstat $ netstat -I $ netstat -n

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

2）IP地址MAC地址 [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)重启关闭

1）关闭 [CentOS6] $ shutdown -h now

[CentOS7] $ poweroff $ systemctl poweroff

2）重启 [CentOS6] $ reboot $ shutdown -r now

[CentOS7] $ reboot $ systemctl reboot

3）单用户模式 [CentOS6] $ init S

[CentOS7] $ systemctl rescue

4）启动模式 [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