ArchLinux下的wifi（無線）問題解決

接著:之前兩篇： 與
 
# 如果之前systemctl enable dhcpcd.service
 systemctl dhcpcd.service
 systemctl disable dhcpcd.service
 # 然後
 cd /etc/netctl
 cp examples/wireless-wpa .    # A simple WPA encrypted wireless connection
 vim wireless-wpa    # Modify
    + Interface=wlp8s0 # iw dev查看, 或ip link 或ifconfig
    + Connection=wireless
    + Security=wpa
    +
    + IP=dhcp
    + ESSID='wifi-name'
    + Key='wifi-passwd'
 # 注意，必須先完成以上才能進行一下，否則有一系列問題
 netctl enable wireless-wpa
 netctl start wireless-wpa
 reboot
 (
    相關檔案夾: /etc/netctl # 網路設定檔夾,假如配置名字叫 wireless-wpa
                /etc/systemd/system #
                /etc/systemd/system  # netctl@wireless-wpa.service
                /etc/systemd/system/multi-user.target.wants # netctl@wireless-wpa.service
    相關命令:
        journalctl -xn
        systemctl --failed
        systemctl list-unit-files
        systemctl daemon-reload
 
        ip link
        ifconfig wlp8s0 up  # start wireless adapter
        ifconfig eno1 up # start wire adapter
 
        # dhcpcd network-adapter 動態分配IP
        dhcpcd eno1
        dhcpcd wlp8s0
 )