Chapter 6. Files and I/O

Fish Shell Chapter 6.
Files and I/O

Checking if a directory exists

Fish Shell uses the test command to check file types and characteristics, including whether a target is a directory.

Creating a temporary file

In Fish Shell, you can create a temporary file using mktemp.

Reading a text file

Here’s the Fish Shell scoop on opening those text files.

Reading command line arguments

Let’s say greet.fish is your script.

Writing a text file

To write to a text file in Fish, you can use the echo command combined with redirection operators.

Writing to standard error

In Fish Shell, you can write to stderr by redirecting your output using >&2.