Arch 修復 network 開機錯誤

學習Arch中間中斷一些時間，為了上次提到的稿子持續使用Ubuntu，這幾天稿子寫完才繼續使用，最近接觸Arch發覺開機都會出現network錯誤訊息。

Warning: Your network settings are deprecated.
Please refer to /etc/rc.conf on how to define a single wired
connection, or use a utility such as netcfg.