rhel7 很多命令和rhel6 都不一樣了，大家需要學習嘍。
先從hostnamectl 開始哈
[root@roidb02 ~]#hostnamectl
static hostname: roidb02
icon name: computer-vm
chassis: vm
machine id: c3e6a26e2e00481f928f0c38b97cf5ab
boot id: f7d681692d96485ea81b3524c7743647
virtualization: kvm
operating system: red hat enterprise linux server 7.3 (maipo)
cpe os name: cpe:/o:redhat:enterprise_linux:7.3:ga:server
kernel: linux 3.10.0-514.el7.x86_64
architecture: x86-64
[root@roidb02 ~]#hostnamectl status
static hostname: roidb02
icon name: computer-vm
chassis: vm
machine id: c3e6a26e2e00481f928f0c38b97cf5ab
boot id: f7d681692d96485ea81b3524c7743647
virtualization: kvm
operating system: red hat enterprise linux server 7.3 (maipo)
cpe os name: cpe:/o:redhat:enterprise_linux:7.3:ga:server
kernel: linux 3.10.0-514.el7.x86_64
architecture: x86-64
[root@roidb02 ~]#hostnamectl --help 幫助非常重要啊
hostnamectl [options...] command ...
query or change system hostname.
-h --help show this help
--version show package version
--no-ask-password do not prompt for password
-h --host=[user@]host operate on remote host
-m --machine=container operate on local container
--transient only set transient hostname
--static only set static hostname
--pretty only set pretty hostname
commands:
status show current hostname settings
set-hostname name set system hostname
set-icon-name name set icon name for host
set-chassis name set chassis type for host
set-deployment name set deployment environment for host
set-location name set location for host
[root@roidb02 ~]# cat /etc/hostname --配置檔案
roidb02
[root@roidb02 ~]# hostnamectl set-hostname roidb01
[root@roidb02 ~]# cat /etc/hostname --配置檔案直接生效了有沒有
roidb01
[root@roidb02 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
[root@roidb02 ~]#
[root@roidb02 ~]#
[root@roidb02 ~]# init 6 --重啟驗證
last login: sun oct 15 07:23:33 2017 from gateway
不拉不拉省略.........
..................
[root@roidb01 ~]#
[root@roidb01 ~]#
[root@roidb01 ~]#
[root@roidb01 ~]#
[root@roidb01 ~]#
[root@roidb01 ~]#hostnamectl
static hostname: roidb01
icon name: computer-vm
chassis: vm
machine id: c3e6a26e2e00481f928f0c38b97cf5ab
boot id: ec156edd01a84bdf8a4d8c91350a2ef2
virtualization: kvm
operating system: red hat enterprise linux server 7.3 (maipo)
cpe os name: cpe:/o:redhat:enterprise_linux:7.3:ga:server
kernel: linux 3.10.0-514.el7.x86_64
architecture: x86-64
[root@roidb01 ~]# cat /etc/hostname
roidb01
[root@roidb01 ~]#
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