awk '{print $1}' *.txt | sort -g | uniq -c
拆解爲: 1 逐行讀取 awk '{print $1}' *.txt 2 逐行讀取&按照數位大小排序 awk '{print $1}' *.txt | sort -g 3 逐行讀取&按照數位大小排序&統計數量 數量在前,類目在後
refer:
https://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858470.html
https://www.runoob.com/linux/linux-comm-awk.html