Yes, I was following the instructions on github, not bitshares wiki:
https:// github .com/dacsunlimited/bitsharesx/blob/master/BUILD_UBUNTU.md
at the end of the page it reads:
"The binary will be located at programs/qt_wallet/BitSharesX The wallet can be installed as a local application capable of handling xts: URLs like so:
sudo cp programs/qt_wallet/BitSharesX /usr/local/bin/"
It took me a while to realize it had installed but was just in a different folder...
(apologies, as newbie, don't know how to post a link properly here yet)