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uniq 是去除相邻行的命令。 仅仅是处理相邻行的处理。
有三个常用的参数
-c:打印的时候,多打印一个数,这个数表示行重复的次数
-d: 这个表示打印的都是重复的行,并且只显示一次, 当然 -cd 就是加上重复的次数了
-u: 仅仅打印没有重复的行。
示例
cat a.txt this is one this is three this is two this is two this is three this is three [root@qd ~]# uniq -c a.txt 1 this is one 1 this is three 2 this is two 2 this is three [root@qd ~]# uniq -d a.txt this is two this is three [root@qd ~]# uniq -u a.txt this is one this is three [root@qd ~]# uniq -cd a.txt 2 this is two 2 this is three
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