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配置一个无线接口，device名称见同配置文件：

config wifi-iface 'guest'
        option device 'ra'
        option mode 'ap'
        option ssid 'PandoraBox-2.4G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

给创建的无线接口配置静态IP：

config interface 'guest'
       option proto 'static'
       option ipaddr '10.0.0.1'
       option netmask '255.255.255.0'

配置dhcp：

config dnsmasq
        #监听所有网卡
        option nonwildcard '0'
        #监听特定网卡
        #option nonwildcard '1'
        #list interface 'lan'    
        #list interface 'guest'  
        #略过

config dhcp 'guest'
        option interface 'guest'
        option start '100'
        option limit '150'
        option leasetime '1h'

配置iptables防火墙，访客网络接口为ra1：

iptables -A INPUT -i ra1 -p udp -m multiport --dport 53,67:68 -j ACCEPT
iptables -A FORWARD -i ra1 -o pppoe-wan -j ACCEPT

同时开放5G和2.4G访客网络：

config wifi-iface 'guest'
        option device 'ra'
        option mode 'ap'
        option ssid 'PandoraBox-2.4G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

config wifi-iface 'guest5'
        option device 'rax'
        option mode 'ap'
        option ssid 'PandoraBox-5G-Guest'
        option network 'guest'
        option rssikick '0'
        option rssiassoc '0'
        option encryption 'psk2'
        option key 'password'
        option isolate '1'

将2.4G和5G桥接：

config interface 'guest'
        option proto 'static'
        option ipaddr '10.0.0.1'
        option netmask '255.255.255.0'
        option type 'bridge'
        option _orig_ifname 'ra1 rax1'
        option _orig_bridge 'true'
        option ifname 'rax1'

iptables -A INPUT -i br-guest -p udp -m multiport --dport 53,67:68 -j ACCEPT
iptables -A FORWARD -i br-guest -o pppoe-wan -j ACCEPT

更改guest无线密码：

#!/bin/sh
str=haiyun`date +%s|cut -c 7-10|sed 's/4/6/g'`
echo $str
uci set wireless.guest.key=$str
uci set wireless.guest5.key=$str
uci commit wireless
wifi reload

参考：
https://openwrt.org/docs/guide-user/network/wifi/guestwifi/guest-wlan

amd：
https://bluesky23.yukishigure.com/en/dxvac/deviceInfo/decoder_amd.html
https://bluesky-soft.com/dxvac/deviceInfo/decoder/amd.html

intel:
https://bluesky23.yukishigure.com/en/dxvac/deviceInfo/decoder_intel.html
https://bluesky-soft.com/dxvac/deviceInfo/decoder/intel.html

nvidia:
https://bluesky23.yukishigure.com/en/dxvac/deviceInfo/decoder_nvidia.html
https://bluesky-soft.com/dxvac/deviceInfo/decoder/nvidia.html

使用以下脚本删除图标缓存：

@echo off
taskkill /im explorer.exe /f
cd /d %userprofile%\appdata\local
del iconcache.db /a 
start explorer

linux下修改sysctl.conf：

net.ipv6.conf.all.use_tempaddr=0
net.ipv6.conf.eth0.use_tempaddr=0 
net.ipv6.conf.default.use_tempaddr=0 

windows下执行命令：

netsh interface ipv6 set privacy state=disable

新建个2G的img文件，不要小于系统占用空间大小：

fallocate -l $(( 2048 * 1024 *1024 )) ubuntu.img

分区：

 cat > fdisk.cmd <<-EOF
o
n
p
1

+128MB
t
c
n
p
2


w
EOF
fdisk ubuntu.img < fdisk.cmd 

挂载img为loop设备：

losetup -f -P --show ubuntu.img 
/dev/loop0

格式化及挂载：

mkfs.vfat -n "BOOTFS" /dev/loop0p1 
mke2fs -F -q -t ext4 -L ROOTFS -m 0 /dev/loop0p2
mkdir /img
mount /dev/loop0p2 /img
mkdir /img/boot
mount /dev/loop0p1 /img/boot

备份系统：

cd /
DIR_INSTALL=/img
cp -r /boot/* /img/boot/
mkdir -p $DIR_INSTALL/dev
mkdir -p $DIR_INSTALL/media
mkdir -p $DIR_INSTALL/mnt
mkdir -p $DIR_INSTALL/proc
mkdir -p $DIR_INSTALL/run
mkdir -p $DIR_INSTALL/sys
mkdir -p $DIR_INSTALL/tmp

tar -cf - bin | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - boot | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - etc | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - home | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - lib | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - opt | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - root | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - sbin | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - selinux | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - srv | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - usr | (cd $DIR_INSTALL; tar -xpf -)
tar -cf - var | (cd $DIR_INSTALL; tar -xpf -)
sync

umount /img/boot
umount /img
losetup -d /dev/loop0

用作U盘启动，boot/uEnv.ini文件：

bootargs=root=LABEL=ROOTFS rootflags=data=writeback rw console=ttyAML0,115200n8 console=tty0 no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0

etc/fstab文件：

LABEL=ROOTFS / ext4 defaults,noatime,nodiratime,commit=600,errors=remount-ro 0 1
LABEL=BOOTFS /boot vfat defaults 0 2
tmpfs /tmp tmpfs defaults,nosuid 0 0