[root@cl-uat-nginx-02 ~]# hostnamectl
    Static hostname: cl-uat-nginx-02
    Icon name: computer-vm
    Chassis: vm
    Machine ID: 61e3e73bb37d428ba1e84cd69d27c82e
    Boot ID: 99fafe42de7f425a850379232d202fb1
    Virtualization: kvm
    Operating System: Red Hat Enterprise Linux Server 7.4 (Maipo)
    CPE OS Name: cpe:/o:redhat:enterprise_linux:7.4:GA:server
    Kernel: Linux 3.10.0-693.el7.x86_64
    Architecture: x86-64
    [root@cl-uat-nginx-02 ~]# cat /etc/sysconfig/network
    # Created by anaconda
    [root@sit-ntp-service-01 ~]# cat /etc/hostname
    sit-ntp-service-01
    [root@cl-uat-nginx-02 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
    DEVICE=”eth0”
    NAME=”eth0”
    BOOTPROTO=”dhcp”
    ONBOOT=”yes”
    STARTMODE=”onboot”
    PERSISTENT_DHCLIENT=”yes”
    PEERDNS=”no”
    [root@cl-uat-nginx-02 ~]#

    1. #!/bin/bash
    2. hostnamectl set-hostname  cl-uat-nginx-02
    3. HostName=$HOSTNAME
    4. HostIP=`ifconfig -a|grep inet|grep -v 127.0.0.1|grep -v inet6|awk '{print $2}'|tr -d "addr:"`
    5. echo "$HostIP"  " "    "$HostName" >> /etc/hosts
    1. [root@cl-uat-nginx-02 ~]# cat /etc/hosts
    2. 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
    3. ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
    4. 10.182.220.87    cl-uat-nginx-02
    5. [root@cl-uat-nginx-02 ~]#