Linux随机设置Mac地址

出于隐私需求，不想暴露自己的真实mac地址。
把下面这个脚本的内容加入/etc/init.d，就可以在每次开机的时候为网卡随机设置一个mac地址。

#!/bin/bash
#Chorder
#2016/12/08
#http://chorder.net
    
mhash=`date +%s|md5sum`
    
ifconfig eth0 down
ifconfig eth0 hw ether `echo ${mhash:$((RANDOM % 13)):2}:\
${mhash:$((RANDOM % 13)):2}:${mhash:$((RANDOM % 13)):2}:\
${mhash:$((RANDOM % 15)):2}:${mhash:$((RANDOM % 15)):2}:\
${mhash:$((RANDOM % 15)):2} `
ifconfig eth0 up

ifconfig wlan0 down
ifconfig wlan0 hw ether `echo ${mhash:$((RANDOM % 13)):2}:\
${mhash:$((RANDOM % 13)):2}:${mhash:$((RANDOM % 13)):2}:\
${mhash:$((RANDOM % 15)):2}:${mhash:$((RANDOM % 15)):2}:\
${mhash:$((RANDOM % 15)):2} `
ifconfig wlan0 up