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236
How do I send my program output to a file on a UNIX system?


The commands described below need to be entered while logged in to the Unix server.   Normally you'll see a prompt ending with $ when the command interpreter (or shell) is ready for another command.

Use the command sequence

command  >  filename

This makes command send its output to filename.

To append output to an existing file, use

command >> filename

For example, to list of all your files, storing the list in a file called files.txt, give the command

ls -lt   >   files.txt

This technique is called redirection.

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Created by Andy Clews on 27 July 2001 and last updated by Andy Clews on 4 August 2015