.1 File

The 1 file extension is associated with the Unix and Unix based operating systems available for various computer platforms developed by AT&T Inc.

This type of .1 file contains unformatted manual page stored in Unix processing document system file format (Roff/nroff/troff/groff).

These documents contains overview of general commands for the Unix operating system.

Example of .1 pages:
chmod.1
mkdir.1
rmdir.1

How to open:

As far as we know, this file type can be accessed on Unix or perhaps also some Linux distribution system.s

How to convert:

Possibly can be exported to other text or document formats with some app on Unix/Linux platform.