hostname的查看和设置

关于hostname
- 查看与设置
- 使用python获取的方法

关于hostname

hostname是一台机器的网络身份标签，往往在安装系统的时候就设置好了。每一台机器应该有自己独一无二的身份id。

A hostname is a label assigned to a machine that identifies the machine on the network. Each device in the network should have a unique hostname.

The hostname can be a simple string containing alphanumeric characters, dots and hyphens. If the machine is connected to the Internet (such as web or mail server) it is recommended to use a fully qualified domain name (FQDN) as a system hostname. The FQDN consists of two parts, the hostname, and the domain name.
引用出处

查看与设置

windows 中我的电脑属性设置
linux系统中

$hostnamectl

lee@lee-VirtualBox:~$ hostnamectl
   Static hostname: lee-VirtualBox
         Icon name: computer-vm
           Chassis: vm
        Machine ID: 113281522bfd49a08ac07ddd600dce03
           Boot ID: 40aa9fc060764230a9f0f60ad6531fed
    Virtualization: oracle
  Operating System: Ubuntu 20.04.3 LTS
            Kernel: Linux 5.15.0-71-generic
      Architecture: x86-64

sudo hostnamectl set-hostname mail.linuxize.com

使用python获取的方法

方法1(在Linux系统中会返回127.0.0.1)：

python 复制代码

def get_host_ip():
    """
    查询本机ip地址
    :return: ip
    """
    
    hostname = socket.gethostname()
    ip = socket.gethostbyname(hostname)
    return ip

方法2：

python 复制代码

import socket
import fcntl
import struct
 
def getip(ifname):
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        netaddr = fcntl.ioctl(s.fileno(), 0x8915, struct.pack('256s', ifname[:15].encode('utf-8')))
        ipaddr = socket.inet_ntoa(netaddr[20:24])
    
        return ipaddr
    except OSError as oe:
        print ('No such device: ', ifname)
 
print ('lo: ', getip('lo'))
print ('eth0: ', getip('eth0'))
print ('eth1: ', getip('eth1'))

方法3,最为可靠：

python 复制代码

def get_host_ip():
    """
    查询本机ip地址
    :return: ip
    """
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.connect(('8.8.8.8', 80))
        ip = s.getsockname()[0]
    finally:
        s.close()
        return ip
···