shell-uniq命令使用

#!/bin/bash
# uniq-test.sh: uniq command use test

This line occurs only once.
This line occurs twice.
This line occurs twice.
This line occurs three times.
This line occurs three times.
This line occurs three times.

sort INPUTFILE | uniq -c | sort -nr 命令 先对 INPUTFILE 排序, 然后统计 每行出现的次数, 最后的(-nr 选项将会产生一个数字的反转排序). 这种命令模版一般都用来分析 log 文件或者用来分析字典列表, 或者用在那些需要检查文本词汇结构的地方.