$ curl -O httpsss://distfiles.macports.org/MacPorts/MacPorts-2.3.3.tar.bz2
$ tar xf MacPorts-2.3.3.tar.bz2
$ cd MacPorts-2.3.3/
$ ./configure
$ make
$ sudo make install

$ export PATH=/opt/local/bin:/opt/local/sbin:$PATH