Those instructions work but have a few corrections:
:Downloading the Sources
> cd bitsharesx
NOT cd bitshares_toolkit
:GUI:: Configuration and Compilation
error suggesting a folder that doesn't exist: cd bitshares-toolkit
just ignore that cd and continue on in the bitsharesx folder
Also, although I didn't do it:
System-wide Installation (optional)
> sudo cp programs/qt_wallet/BitSharesX /usr/local/bin/
> sudo cp programs/qt_wallet/bin/BitSharesX /usr/local/bin/
To help readability, it would useful to include an #anchor jump from the end of what is Debian/Ubuntu and ArchLinux over the OSX instructions as the subheading might appear to also be needed for Linux.
The Debian/Ubuntu dependancies suggested are likely correct but I note that on the previous attempt installing just the toolkit I also did this following puppies suggestion:
> sudo apt-get install qt5-default libqt5webkit5-dev npm nodejs-legacy
With only 0.5GB RAM the Core takes ~11hrs and the GUI ~1hr to compile. Having an official BitShares ppa:: repository would be a great next step.