搭建Linux平台的无线热点，需要无线网卡和驱动都要支持 AP。
试了下Ubuntu平台默认驱动并不支持AP模式，所以需要更换驱动，具体操作步骤如下：
1.找到自己网卡芯片的型号，由于我的环境是搭建在本地的虚拟机上的，wifi是usb网卡。所以查找usb设备：lsusb
root@ubuntu:~/rtl8188eus# lsusb Bus 001 Device 003: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
2.通过查询信息可以或得 RTL8188EUS是我的无线网卡驱动，然后上GitHub搜索。
最终找到这个驱动：https://github.com/quickreflex/rtl8188eus
执行以下命令：
git clone https://github.com/lwfinger/rtl8188eu make all make install
make all 的时候可能报错
root@Ubuntu:~/rtl8188eu# make all make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.4.0-131-generic/build M=/root/rtl8188eu modules make[1]: Entering directory '/usr/src/linux-headers-4.4.0-131-generic' arch/x86/Makefile:133: stack-protector enabled but compiler support broken arch/x86/Makefile:148: CONFIG_X86_X32 enabled but no binutils support Makefile:704: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler make[1]: gcc: Command not found CC [M] /root/rtl8188eu/core/rtw_ap.o /bin/bash: gcc: command not found scripts/Makefile.build:277: recipe for target '/root/rtl8188eu/core/rtw_ap.o' failed make[2]: *** [/root/rtl8188eu/core/rtw_ap.o] Error 127 Makefile:1437: recipe for target '_module_/root/rtl8188eu' failed make[1]: *** [_module_/root/rtl8188eu] Error 2 make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-131-generic' Makefile:151: recipe for target 'modules' failed make: *** [modules] Error 2
这是因为缺少了 build-essential 软件包，它的作用是 提供编译程序必须软件包的列表信息。再更新下 linux-headers-generic
apt-get install linux-headers-generic apt-get install build-essential
然后再执行 make all 和 make install
3.查询新的驱动：lshw -c network。 driver=rtl8188eu就是我们新安装上去的驱动
root@Ubuntu:~/rtl8188eus# lshw -c network *-network description: Ethernet interface product: 82545EM Gigabit Ethernet Controller (Copper) vendor: Intel Corporation physical id: 1 bus info: pci@0000:02:01.0 logical name: ens33 version: 01 serial: 00:0c:29:b9:f1:0e size: 1Gbit/s capacity: 1Gbit/s 64 bits clock: 66MHz capabilities: pm pcix bus_master cap_list rom ethernet physical logical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=10.1.4.24 latency=0 link=yes mingnt=255 multicast=yes port=twisted pair speed=1Gbit/s resources: irq:19 memory:fd5c0000-fd5dffff memory:fdff0000-fdffffff ioport:2000(size=64) memory:fd500000-fd50ffff *-network DISABLED description: Wireless interface physical id: 2 bus info: usb@1:1 logical name: wlx488ad2a0e0fe serial: 48:8a:d2:a0:e0:fe capabilities: ethernet physical wireless configuration: broadcast=yes driver=rtl8188eu multicast=yes wireless=unassociated
4.无线网络其他命令：
#开启网卡接口服务 ifconfig wlx488ad2a0e0fe up #查看设备上网络信息 iwconfig #默认使用所有无线网卡搜索 iwlist scanning | more #使用特定网卡搜索 iwlist wlx488ad2a0e0fe scan | more iwlist wlx488ad2a0e0fe scan
提供另一个GitHub上的驱动：https://github.com/lwfinger/rtlwifi_new