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Developing the which(1) Utility in Go

Let’s learn how to create the Go version of the which(1) utility to locate a program file in the user's PATH value.

We'll cover the following...

Go code for which(1)
Coding example
Let’s try our code

Let’s now discuss a practical example for developing a Go version of the which(1) utility, which locates a program file in the user's PATH value.

Go can work with our operating system through a set of packages. A good way to learn a new programming language is by trying to implement simple versions of traditional UNIX utilities. In this lesson, we’ll see a Go version of the which(1) utility, which will help us understand the way Go interacts with the underlying OS and reads environment variables. ...

Course Introduction

Introduction to Go

Basic Go Data Types

Composite Data Types

Reflection and Interfaces

Go Packages and Functions

Telling a UNIX System What to Do

Go Concurrency

Building Web Services

Working with TCP/IP and WebSocket

Working with REST APIs

Code Testing and Profiling

Working with gRPC

Go Generics

Conclusion

Appendix A—Go Garbage Collector

Developing the which(1) Utility in Go