Bitcoin Core compiled "bad91-dirty" version After compiling Bitcoin Core following their guidelines I get a "dirty" version as seen in the screenshot below.

git clone https://github.com/bitcoin/bitcoin.git
cd bitcoin
sudo git checkout 0.15
sudo ./autogen.sh
sudo ./configure LDFLAGS="-L/root/bitcoin/db4/lib/" CPPFLAGS="-I/root/bitcoin/db4/include/"
sudo make -s -j5
sudo make install




I also am unable to get the node listed on https://bitnodes.21.co and I presume it's because of this? Using the normal Bitcoin Core node bitcoin.org has already compiled works fine in that regard.

Why is it doing this and how can I compile a normal version? It does the same if I compile 0.14
The "51bad91" may be a bit misleading here, it's just coincidence that it says "bad". It's actually just the most recent commit on the 0.15 branch, https://github.com/bitcoin/bitcoin/commit/51bad9195eb435200626beccbaf6b60774a4a894

The -dirty suffix is added during the build here:
https://github.com/bitcoin/bitcoin/blob/master/share/genbuild.sh#L38

I believe that just means that the most recent commit on the 0.15 branch (the 15bad91 commit) was not tagged (i.e. part of the actual 0.15 or 0.15.0.1 release, it is on that branch in preparation for 0.15.0.2).

Thus you should be able to avoid the -dirty suffix by checking out the version tag rather than the branch, i.e. checkout v0.15.0.1