connect Wifi in linux via cmd

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All cmd run by root.

create config file via cmd:

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wpa_passphrase SSIDofWifi passwordOfWifi > /etc/wpa_supplicant/wpa_supplicant.conf

modify config: /etc/wpa_supplicant/wpa_supplicant

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ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=root
network={
    ssid="theSSID"
    psk={encoded psk}
    scan_ssid=1 # to connect to a hiden Wifi
    proto=RSN
    key_mgmt=WPA-PSK
    group=CCMP
    pairwise=CCMP
    priority=10
}

connect to specific Wifi:

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wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -i wlp7s0 -B

-B: run in background

if failed:

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ps -aux | grep wpa # get pid of running wpa_supplicant instance
kill -9 {pid}

or just:

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kill -9 wpa[press Tab]

get ip add via dhcp:

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dhclient

todo:
wpa_supplicant.service

References

https://blog.csdn.net/u012503786/article/details/79541811/
https://blog.csdn.net/yunlong654/article/details/88655685
https://blog.csdn.net/u010049696/article/details/48765999