Files with commandline file extension may exist. However, at the moment, we do not have any information regarding their origin or purpose.
COMMANDLINE file extension - Unknown file extension
What is commandline file? How to open commandline files?
File type specification:
The commandline file extension seems to be in use for certain files that are mentioned on the internet. However, we have not yet found their original program nor any specific information about it.
If you know some more useful informations about the commandline file extension, please let us know in the discussion below or on our forums.