Official mirrors
The official Arch Linux mirror list is available from the pacman-mirrorlist package. To get an even more up-to-date list of mirrors, use the Pacman Mirror List Generator page on the main site.
In the unlikely scenario that you are without any configured mirrors and pacman-mirrorlist is not installed, run the following command:
手動下載鏡像列表
有時因爲系統鏡像列表丟失或可讀性不強，我們需要從官方網站下載按地區分類的鏡像列表，很簡單，執行如下命令：
wget -O /etc/pacman.d/mirrorlist https://www.archlinux.org/mirrorlist/all/