3 this is a test
1 i am tank
2 i love tank
1 this is a test
2 whom have a try
1 you have a try
1 i want to abroad
2 those are good men //只有一行，显示二行
在这里those只有一行，显示的却是重复了，这是因为，-f 1 忽略了第一列，检查重复从第二字段开始的 。
代码如下：
［zhangy@BlackGhost mytest］$ uniq -i -c uniqtest
3 this is a test
1 i am tank
2 i love tank
1 this is a test
2 whom have a try //一个大写，一个小写
1 you have a try
1 i want to abroad
1 those are good men
1 we are good men
检查的时候，不区分大小写
代码如下：
［zhangy@BlackGhost mytest］$ uniq -s 4 -c uniqtest
3 this is a test
1 i am tank
2 i love tank
1 this is a test
3 whom have a try //根上一个例子有什么不同
1 i want to abroad
1 those are good men
1 we are good men
检查的时候，不考虑前4个字符，这样whom have a try 就和 you have a try 就一样了 。
代码如下：
［zhangy@BlackGhost mytest］$ uniq -u uniqtest
i am tank
this is a test
whom have a try
WhoM have a try
you have a try
i want to abroad
those are good men
we are good men
去重复的项，然后全部显示出来
代码如下：
［zhangy@BlackGhost mytest］$ uniq -w 2 -c uniqtest
3 this is a test
3 i am tank
1 this is a test
1 whom have a try
1 WhoM have a try
1 you have a try
1 i want to abroad
1 those are good men
1 we are good men
对每行第2个字符以后的内容不作检查，所以i am tank 根 i love tank就一样了 。
上面就是Linux下使用uniq命令删除重复行命令的方法介绍了，有时文本中的重复行不仅没有用处，还占用空间，快使用uniq命令进行清除吧 。
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