本文介绍了获取不在file2中的file1行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有两个很长但已排序的文件.如何获取第一个文件中不在第二个文件中的所有行?
I have two long, but sorted files. How to get all lines of first file which are not in second file ?
file1
0000_aaa_b
0001_bccc_b
0002_bcc <------ file2 have not that line
0003_aaa_d
0006_xxx
...
file2
0000_aaa_b
0001_bccc_b
0003_aaa_d
0006_xxx
...
推荐答案
这是comm命令的作用:
$ comm -3 file1 file2
0002_bcc
来自man comm:
DESCRIPTION
Compare sorted files FILE1 and FILE2 line by line.
With no options, produce three-column output. Column one contains
lines unique to FILE1, column two contains lines unique to FILE2, and
column three contains lines common to both files.
-1 suppress column 1 (lines unique to FILE1)
-2 suppress column 2 (lines unique to FILE2)
-3 suppress column 3 (lines that appear in both files)
这篇关于获取不在file2中的file1行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！