If you install a fixpack or a hotfix for a domino server running on Linux/Unix you might see the following message:
You must create the environment variable NUI_NOTESDIR as path of the directory
that contains notes/latest. E.g., for the default path /opt/lotus/notes/latest
To fix this issue on a domino server running on Debian (yes unsupported ;-) ) you could for example edit the:
via "nano /etc/profile"
and add the line:
where <path_to_lotus> is the full path to the 'lotus' directory for the server to receive the hotfix installation
After that relogin and the issue is solved.