Fold (Unix)

fold is a Unix command used for making a file with long lines more readable on a limited width computer terminal by performing a line wrap.
Most Unix terminals have a default screen width of 80, and therefore reading files with long lines could get annoying. The fold command puts a line feed every X characters if it does not reach a new line before that point. If the codice_1 argument is set, the fold command allows the user to set the maximum length of a line.
History.
 is part of the X/Open Portability Guide since issue 4 of 1992. It was inherited into the first version of POSIX.1 and the Single Unix Specification. It first appeared in 1BSD of 1977.
The version of codice_2 bundled in GNU coreutils was written by David MacKenzie.
Example.
As a usage example, to fold a file named codice_3 to have a maximum of 50 characters per line, one could run the following command:
fold -w 50 file.txt