在MacOS上安装md5sum

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本文介绍如何在MacOSX上安装md5sum和sha1sum工具。由于这些工具未默认安装，文章提供了源码编译安装的方法，并解决了安装过程中遇到的权限问题。此外，还介绍了如何通过简单的配置使系统自带的md5工具兼容md5sum的输出格式。

引用：http://blog.youkuaiyun.com/waleking/article/details/7253539

HOWTO: Install md5sum & sha1sum on Mac OS X

I was a bit surprised to learn that my Mac didn’t have the md5sum and sha1sum tools installed by default. A quick search and I found a site that provides the source. The sources compiled successfully on my Mac (OS X 10.5.5, xCode tools installed).

The only quirk appears in the last step:

$ ./configure $ make $ sudo make install cp md5sum sha1sum ripemd160sum /usr/local/bin chown bin:bin /usr/local/bin/md5sum /usr/local/bin/sha1sum \ /usr/local/bin/ripemd160sum chown: bin: Invalid argument make: *** [install] Error 1

The make install command tries to change the ownership of the files to thebin user. Since that user doesn’t exist on my system, the command fails. This isn’t a problem though, as both binaries work perfectly. By default, they are installed to /usr/local/bin/.

Update
As a commenter pointed out, the /sbin/md5 utility provided by OS X contains a hidden -r switch that causes it to output in a format identical to that of md5sum, making it compatible with scripts that require md5sum’s format. If you want to use the md5 utility provided by OS X, you can add the following to your ~/.profile or ~/.bashrc:

 
         alias 
         md5= 
         'md5 -r' 
        

 
         alias 
         md5sum= 
         'md5 -r' 
        