Can we get an answer from Sidefx on this please? Over a year and a half to answer the question? I have the same problem setting up HQueue so this seems to be an oversight in their installer for some reason.
My setup:
Linux Mint 19.3
Houdini Indie 18.0.566
Houdini installed with the launcher, HQueue installed manually from downloaded files. For some reason the launcher won't let me install the server:

Nothing happens when I click on: “Choose another version”
In my path:

In my installation directory:

Error from HQueue:

In HQueue properties “view”
“hythonCommandsLinux”: “export HFS=\”/opt/houdini/Houdini18.0.566/bin\“ && cd $HFS && source ./houdini_setup && hython -u”,
“pythonCommandsMacosx”: “export HFS=\”/opt/houdini/Houdini18.0.566/bin\“ && $HFS/Frameworks/Python.framework/Versions/2.7/bin/python”,
“pythonCommandsLinux”: “export HFS=\”/opt/houdini/Houdini18.0.566/bin\“ && $HFS/python/bin/python2.7”,
“pythonCommandsWindows”: “(set HFS=\\opt\\houdini\\Houdini18.0.566\\bin) && (set PATH=\\opt\\houdini\\Houdini18.0.566\\bin\\python27;\\opt\\houdini\\Houdini18.0.566\\bin\\bin;!PATH!) && echo Accessing \”!HFS!\\python27\\python2.7.exe\“ … && \”!HFS!\\python27\\python2.7.exe\“”,
“mantraCommandsLinux”: “export HFS=\”/opt/houdini/Houdini18.0.566/bin\“ && cd $HFS && source ./houdini_setup && $HFS/python/bin/python2.7 $HFS/houdini/scripts/hqueue/hq_mantra.py”,
Any help would be appreciated.