笔记本在裸机情况下没有ficonfig、iw、nmcli等软件，没有网线仅有网卡，此时只有通过wpa_supplicant来连接wifi。

无线网卡开启

• 查看网卡设备号(Device)

ip addr

• 查看无线网卡是否激活

ip link show wlp18s0b1

• 激活无线网卡

ip link set wlp18s0b1 up

• 连接网卡

# ssid-无线网络名称 pwd-无线网密码
wpa_supplicant -B -i wlp18s0b1 -c <(wpa_passphrase "ssid" "pwd")

• 动态获取IP

# 如果动态获取IP失败
# systemctl stop NetworkManager
# systemctl disable NetworkManager
# reboot
dhclient wlp18s0b1

• 查看IP

ip addr show wlp18s0b1

将wifi改为静态IP

• 获取NETMASK

# 如果ifconfig没有
# yum -y install net-tools
ifconfig

• 获取DNS

cat /etc/resolv.conf

• 获取GATEWAY

netstat -rn

• 通过图形界面生成ifcfg-wlp18s0b1和keys-wlp18s0b1

nmtui

• 修改ifcfg-wlp18s0b1

cd /etc/sysconfig/network-scripts/
vim ifcfg-wlp18s0b1

# ifcfg-wlp18s0b1
ESSID=ssid
MODE=Managed
KEY_MGMT=WPA-PSK
MAC_ADDRESS_RANDOMIZATION=default
TYPE=Wireless
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=wlp18s0b1
UUID=6e1d4b65-1669-4a6d-82aa-f92c87cdf4a6
DEVICE=wlp18s0b1
ONBOOT=yes
IPADDR=192.168.101.29
NETMASK=255.255.255.0
DNS1=192.168.101.1
GATEWAY=192.168.101.1

• 启动/停止/重启网络服务或者重启

service network stop/start/restart

网络状态查看

# Ensure that your device is included in the INTERFACES line in this file.
vi /etc/sysconfig/wpa_supplicant
# 查看无线网接口(Interface)
iw dev
# 查看接口连接信息
iw wlp3s0 link
# 查看网络接口/网卡状态
ip addr
ip link
# 查看周围wifi
iw dev wlp18s0b1 scan | grep SSID