我有两个很长但已排序的文件.如何获取不在第二个文件中的第一个文件的所有行？
文件1
0000_aaa_b 0001_bccc_b 0002_bcc <------ file2 have not that line 0003_aaa_d 0006_xxx ...
文件2
0000_aaa_b 0001_bccc_b 0003_aaa_d 0006_xxx ...
解决方法
这是comm命令的用途：
$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)
