Bash：grep 独特的行

Question

我想要grep独特的路线。这是文件内容：

this is line 1
this is line 1
this is line 2
this is line 1
this is line 1

我只想输出this is line 2到我的外壳。我怎样才能做到这一点？

Answer 1

sort x.txt |uniq -u

假设您的文件在 x.txt 中，它给出

this is line 2 

Answer 2

查看man uniq：

 -u      Only output lines that are not repeated in the input.

考虑到这一点， sort 会进行成对比较以查看它的邻居是否匹配，这意味着您需要在将输出输入到 之前对输出进行排序uniq：

$sort my_list.txt | uniq -u