用shell找出两个文本文件的不同的行亲自实验过的方法如下：第一种：comm命令法命令如下：comm -3 file1 file2有一个问题就是，如果两个文件排序不一样的话，会出问题第二种：grep命令法命令如下：grep -vwf file1 file2统计file1中没有，file2中有的行具体使用环境以后再补充，今天先记录到这里。参考文档：1、找出两个文件内容的相同与不同：http://blog.csdn.net/shuckstark/article/details/78721762、comm命令：http://michaels.blogbus.com/logs/44427299.html3、linux grep用法：http://blog.csdn.net/greytree/article/details/4285324、linux grep命令：ttp://www.cnblogs.com/end/archive/2012/02/21/2360965.html

找出两个文件不同的数据    #!/bin/sh function _diffab(){x=0for i in `cat $1`;do        for j in `cat $2`;do                if [ $i == $j ];then                        x=1                        break;                fi        done                if [ $x -ne 1 ];then                        echo $i                fi        x=0done} if [ "$1" == "" ] || [ "$2" == "" ];thenecho "use like this: $0 filea fileb"else{_diffab $1 $2_diffab $2 $1}fi

 

$ comm --helpUsage: comm [OPTION]... FILE1 FILE2Compare sorted files FILE1 and FILE2 line by line.With no options, produce three-column output.  Column one containslines 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)  --check-order     check that the input is correctly sorted, even                      if all input lines are pairable  --nocheck-order   do not check that the input is correctly sorted  --output-delimiter=STR  separate columns with STR      --help     display this help and exit      --version  output version information and exitNote, comparisons honor the rules specified by `LC_COLLATE'.Examples:  comm -12 file1 file2  Print only lines present in both file1 and file2.  comm -3  file1 file2  Print lines in file1 not in file2, and vice versa.Report comm bugs to bug-coreutils@gnu.orgGNU coreutils home page: 
     General help using GNU software: 
     For complete documentation, run: info coreutils 'comm invocation'