Linux对比文件夹内容的命令 Diff解释

dir1下有个log_1.log dir2下有个log_2.log 两个文件如下:

p_ylwu@VM_194_111_sles10_64:/home/jdxochen/exercise> cat -v dir1/log_1.log 
1
3
5
7
9
0
p_ylwu@VM_194_111_sles10_64:/home/jdxochen/exercise> cat -v dir2/log_2.log 
2
4
6
8
0
0

若想看详细的内容区别 使用diff -urNa dir1 dir2



参数说明:

-a  Treat  all  files  as text and compare them     
    line-by-line, even if they do not seem to be text.

-N, --new-file
    In  directory  comparison, if a file is found in
    only one directory, treat it as present but empty
    in the other directory.

-r  When comparing directories, recursively compare
    any subdirectories found.
-u  Use the unified output format.

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