Linux文件比较

宗禹

                diff
$ diff -i file1 file2 不理会大小写
$ diff -B file1 file2 不理会空白行
$ diff dir1 dir2
$ diff -r dir1 dir2 递归
cmp
$ cmp file1 file2 10 20  从file1的第10个字节、file2的第20个字节
$ cmp -l file1 file2 长格式输出
md5sum
比较2个文件
$ md5sum file1 > sum1
$ md5sum file2 > sum2
$ diff -q sum1 sum2 只说明两者内容是否有差异
File sum1 and sum2 differ
比较多个文件
$ md5sum file1 file2 file3 > mysum
$ md5sum -c mysum
file1: OK
file2: OK
file3: OK
$ echo "1" > file3
$ md5sum -c mysum
file1: OK
file2: OK
file3: FAILED
md5sum: WARNING: 1 of 3 computed checksum did NOT match
               
               
               

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