在MacOS上安装md5sum

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:

?

aliasmd5='md5 -r'

aliasmd5sum='md5 -r'