I did get this working.
I moved the nodebb working directory to /home/nodebb/nodebb and changed ownership of that to nodebb:nodebb, now it starts up on boot as the nodebb user just fine.
Thank you all very much for the help.
dbsearch installed plug-in for searching, but by default it is not looking for anything. If you select "All Categories" displays all positions, even those that do not have the desired expression.
Please tell me what to do to search worked fine?
I tried to update Nodebb (for a long time I did not do it), but I did not. Two o'clock spent.
@sergej-saveljev may be you need index DB? In ACP open "Plugins->DB Search" and index your forum.
@alff0x1f I did it
Nodebb I updated to the latest version - the problem has not disappeared.
@sergej-saveljev seems you index posts. I don't know solution and why your search didn't work.