How to append output to an existing file in Bash?

To append output to an existing file in Bash, you can use the >> redirection operator.

Here is an example:

In this example, command is the command whose output you want to append to the file filename.txt. The >> operator redirects the output of the command and appends it to the end of the existing content in the file. If the file does not exist, it will be created.

For example, let's say you want to append the output of the ls command to an existing file called output.txt:

This will append the output of the ls command to the end of the output.txt file.