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其他
7z
cmp - Linux命令大全 - 笔下光年
网站首页
cmp
比较两个文件是否有差异 ## 补充说明 **cmp命令** 用来比较两个文件是否有差异。当相互比较的两个文件完全一样时,则该指令不会显示任何信息。若发现有差异,预设会标示出第一个不通之处的字符和列数编号。若不指定任何文件名称或是所给予的文件名为“-”,则cmp指令会从标准输入设备读取数据。 ### 语法 ```shell cmp(选项)(参数) ``` ### 选项 ```shell -c或--print-chars:除了标明差异处的十进制字码之外,一并显示该字符所对应字符; -i<字符数目>或--ignore-initial=<字符数目>:指定一个数目; -l或——verbose:标示出所有不一样的地方; -s或--quiet或——silent:不显示错误信息; -v或——version:显示版本信息; --help:在线帮助。 ``` ### 参数 目录:比较两个文件的差异。 ### 实例 使用cmp命令比较文件"testfile"和文件"testfile1"两个文件,则输入下面的命令: ```shell cmp testfile testfile1 #比较两个指定的文件 ``` 在上述指令执行之前,使用cat命令查看两个指定的文件内容,如下所示: ```shell cat testfile #查看文件内容 Absncn 50 #显示文件“testfile” Asldssja 60 Jslkadjls 85 cat testfile1 #查看文件内容 Absncn 50 #显示文件“testfile1” AsldssjE 62 Jslkadjls 85 ``` 然后,再执行cmp命令,并返回比较结果,具体如下所示: ```shell cmp testfile testfile1 #比较两个文件 testfile testfile1 #有差异:第8字节,第2行 ``` 注意:在比较结果中,只能够显示第一比较结果。
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