uniq命令
作用:显示唯
行
对于那些连续重复行只显示次！ 接下来通过实战例子介绍说明:
[root@stu100 ~]# cat test
boy took bat home
boy took bat home
girl took bat home
dog brought hat home
dog brought hat home
dog brought hat home
看test文件
内容可以看到其中连续重复行 [root@stu100 ~]# uniq test
boy took bat home
girl took bat home
dog brought hat home
uniq命令不加任何参数
仅显示连续重复行次 [root@stu100 ~]# uniq -c test
2 boy took bat home
1 girl took bat home
3 dog brought hat home
-c 参数显示文件中每行连续出现
次数
[root@stu100 ~]# uniq -d test
boy took bat home
dog brought hat home
-d选项仅显示文件中连续重复出现
行 [root@stu100 ~]# uniq -u test
girl took bat home
-u选项显示文件中没有连续出现
行 [root@stu100 ~]# uniq -f 2 -s 2 test
boy took bat home
忽略每行
前2个字段忽略第 2个空白
和第 3个字段首结果at home [root@stu100 ~]# uniq -f 1 test
boy took bat home
dog brought hat home
忽略每行
第个字段这样boy girl开头行看起来是连续重复行 
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