How to open Manual page (Unix) .1 files
Have you had trouble opening the 1 file on your computer? What are 1 files? We explain what they are and recommend software that we know will open them.
What is 1 file?
Documents with a .1 file extension are typically found on the Unix platform and are used in certain document systems in the manual / help file system.
Manual page (Unix) description
The "1" in Unix or Linux refers to the section number of the manual. The manual is divided into several sections, each for a different type of command or function.
Section 1 of the manual typically contains general commands that a user can use on the command line. So, a "1 file" in Unix would refer to a file that contains an unformatted manual page from section 1 of the Unix manual. This would typically be a text file that provides information on how to use a specific command.
Suggested software to open 1 file

Unix
A multi-tasking operating system for various platforms

GNU Emacs
A popular text editor for linux
There are other 1 filename extensions with the same .1 suffix
1 - AIM AOL IM file
Files with 1 extension are associated with AIM OL Instant Messenger and they are used as one of the internal various data files.
1 - Log file used by GNU Screen, a terminal multiplexer; records all output and input from a session for later review or analysis
A 1 file extension is related to the GNU Screen software. A 1 file contains log.
1 - Cache used by Google Android
Files with 1 file extension are related to the Google Android, an operating system for smart phones and tablets. A 1 file contains cache.
1 - Binary data used by Inno Setup for installation purposes
Files with 1 file extension can also be found as installation resource packs for program setups made using Inno Setup software.
1 - Mozilla Firefox file
Files with 1 extension are always used by Mozilla Firefox to store data for cookies.
1 - Backup file for Pro/ENGINEER software
Files with 1 suffix can also be found as part of old Pro/ENGINEER 3D CAD software. Some sort of auto-recovery backup.
1 - Archive files compressed with Stuffit software
A 1 file extension is associated with the Stuffit and used for its archive files.
1 - SNES split ROM image
Files with .1 file extension can also be found as Super Nintendo ROM cartridge images for SNES emulators like Snes.9x