Bash：grep 独特的线条
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Bash : grep unique lines
提问by Lazuardi N Putra
I'd like to grepunique line. This is the file content:
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
I just want to output this is line 2to my shell.
How can I do that?
我只想输出this is line 2到我的外壳。我怎样才能做到这一点？
回答by KeepCalmAndCarryOn
sort x.txt |uniq -u
assuming your file is in x.txt which gives
假设您的文件在 x.txt 中，它给出
this is line 2
回答by KeepCalmAndCarryOn
Check out man uniq:
退房man uniq：
-u Only output lines that are not repeated in the input.
With that in mind, sort does a pairwise comparison to see if it's neighbor matches, meaning that you need to sort your output before feeding it to uniq:
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提供给 之前对其进行排序uniq：
$ sort my_list.txt | uniq -u
$ sort my_list.txt | uniq -u
回答by Jotne
Here is an awksolution:
这是一个awk解决方案：
awk '{a[##代码##]++} END {for (i in a) if (a[i]==1) print i}' file
this is line 2
