Convert a file using custom parameters (the dox_cmd.h file in assimp's source code lists available parameters)
assimp: is a command line utilitiy that allows interaction with 3D models
Use 'assimp <verb> --help' to get detailed help for a command.
Display statistics and structure of a 3D model
Display Assimp version
List all known file extension
Check whether a file extension is recognized by Assimp
Extract an embedded texture from a model
Convert a model to binary or XML dumps (ASSBIN/ASSXML)
Compare two file dumps produced with 'assimp dump <file> -s ...'
On Debian systems you should be able to find a manual in file:///usr/share/doc/assimp-utils/assimp/index.html