How to configure the hostname in Oracle Linux7?

How to configure the hostname in Oracle Linux7?

How to configure the hostname in Oracle Linux7?
Source:
How to Configure hostname in Oracle Linux 7 (Document ID 2049221.1)

Applicable:
Linux OS-Version Oracle Linux 7.0 and later
Linux x86
Linux x86-64

Objectives:
This document describes how to modify the hostname in Oracle Linux7.
Note: manually APPEND "HOSTNAME = xxxxx" to/etc/sysconfig/network and restart OS. This method does not take effect in Oracle Linux7.

Solution:
Use either of the following three methods to modify the host name in Oracle Linux7:

1. use hostname control utility: hsotnamectl2. use NetworkManager command line tool: nmcli3. edit /etc/hostname file directly (a reboot afterwards is required)

 

1. Use hsotnamectl which is a command-line client to Use EMD-hostnamed service

Get current hostname status:

[[email protected] ~]# hostnamectl status   Static hostname: localhost.localdomain         Icon name: computer           Chassis: n/a        Machine ID: ed264df49f3f42b7b64ca75f763ad117           Boot ID: 3ec1705218b9499b9619e1bdca7be737    Virtualization: oracle  Operating System: Oracle Linux Server 7.1       CPE OS Name: cpe:/o:oracle:linux:7:1            Kernel: Linux 3.8.13-55.1.6.el7uek.x86_64      Architecture: x86_64

Set hostname:

[[email protected] ~]# hostnamectl set-hostname oraclelinux.oracle.com[[email protected] ~]#

Re-login terminal session:

[[email protected] ~]# hostnamectl status   Static hostname: oraclelinux.oracle.com         Icon name: computer           Chassis: n/a        Machine ID: ed264df49f3f42b7b64ca75f763ad117           Boot ID: 3ec1705218b9499b9619e1bdca7be737    Virtualization: oracle  Operating System: Oracle Linux Server 7.1       CPE OS Name: cpe:/o:oracle:linux:7:1            Kernel: Linux 3.8.13-55.1.6.el7uek.x86_64      Architecture: x86_64

2. nmcli

Check current hostname:

[[email protected] ~]# nmcli general hostnamelocalhost.localdomain

 

Modify hostname and restart ystemd-hostnamed service:

[[email protected] ~]# nmcli general hostname oraclelinux.oracle.com[[email protected] ~]# systemctl restart systemd-hostnamed

Re-login terminal session:

[[email protected] ~]# hostnameoraclelinux.oracle.com

 

3. Edit/etc/hostname

View current content:

[[email protected] ~]# cat /etc/hostnamelocalhost.localdomain

Replace file content with new hostname:

[[email protected] ~]# echo "oraclelinux.oracle.com" > /etc/hostname[[email protected] ~]# cat /etc/hostnameoraclelinux.oracle.com

Restart system and verify:

[[email protected] ~]# hostnameoraclelinux.oracle.com