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The basic syntax of redirecting the standard output of a command into the file is as follows: command_name > filename

Case 1: Writing Output to a File Using > Operatorįirst of all, I am going to show you how to save a command’s output to a file using the > operator. You can also save the overall output of a script into a file. You can save the output or error of each of those commands into files. 5 Cases of Writing Commands Output to File Using Bash ScriptĪ Bash script may contain multiple commands within it. In Bash, you can redirect these output streams to files using various methods. The numeric descriptor for this stream is 0. Standard Input (stdin): This stream receives input data to a command. The standard error is usually represented by the numeric descriptor 2.

Standard Error (stderr): This stream is used to display error messages and warnings. The standard output is usually represented by the numeric descriptor 1. Standard Output (stdout): This is the default output stream where normal command output is sent. One can control the flow of these standard streams and efficiently use the output of a command. Download the Practice Files Understanding Standard Streams of a Bash Commandīash commands typically have three standard streams.