🖥️ 修改主机名的方法

方法一：使用hostnamectl命令

使用hostnamectl命令 —会自动修改/etc/hostname，重新登录后生效

hostnamectl set-hostname vm63centos

方法二：直接修改配置文件

修改配置文件 /etc/hostname 保存退出

vi /etc/hostname

输入新的主机名，例如：

vm239centos

不重启好像能生效

🔄 修改hosts文件

腾讯云Centos7服务器修改/etc/hosts https://www.jianshu.com/p/2e27a4d7b9aa↗

# Your system has configured 'manage_etc_hosts' as True.
# As a result, if you wish for changes to this file to persist
# then you will need to either
# a.) make changes to the master file in /etc/cloud/templates/hosts.redhat.tmpl
# b.) change or remove the value of 'manage_etc_hosts' in
#     /etc/cloud/cloud.cfg or cloud-config from user-data
#
# The following lines are desirable for IPv4 capable hosts
127.0.0.1 VM_100_63_centos VM_100_63_centos
127.0.0.1 localhost.localdomain localhost
127.0.0.1 localhost4.localdomain4 localhost4

# The following lines are desirable for IPv6 capable hosts
::1 VM_100_63_centos VM_100_63_centos
::1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6

修改模板文件：

vi /etc/cloud/templates/hosts.redhat.tmpl

添加：

192.168.100.63 vm63centos

修改云配置：

vi /etc/cloud/cloud.cfg

修改或删除manage_etc_hosts的值

📝 验证主机名

查看当前主机名：

hostname

查看主机名详细信息：

hostnamectl status