Gain insights into the command-line interface, delve into navigating file systems, creating scripts, and automating tasks to enhance productivity and control your computer efficiently.

Small, Sharp Software Tools by The Pragmatic Programmer_ .png

ubuntu.tar.gz

Python job

ncjob

In this course, you will get the chance to explore the command-line interface (CLI), starting with basics like navigating file systems and working with directories and files. Then, you will use those building blocks to tackle more advanced features and tasks within the CLI. You will also learn to turn basic commands into executable scripts and easily automate common tasks. This course will empower you to put the interface to work, take complete control of your computer, and hack your way to productivity.

Harnessing the Power of the Command-Line Interface

# The `ps` command

When we used the `echo` command to create a file, we took the output of one command and directed it somewhere else. Let’s look at this in more detail.

Run the terminal below to execute this command to view all of the running processes:

```bash
$ ps -ef
```

The `ps` command shows us the processes running, and the `-ef` options show us the processes for every user in all sessions.

This problem can be solved in a couple of ways. 
## Using the `>` operator

But a better way involves fewer steps. We can redirect the output of the `ps` command to the `less` command by using the pipe (`|`) character. Remember, we can press the “q” key to exit.

```bash
$ ps -ef > processes.txt
```

We can then open that file in a text editor and read its contents.  We can use `cat` or `touch` commands to see the file, or we can use `less` to view it one page at a time.

## Using the pipe character
But a better way involves fewer steps. You can redirect the output of the ps command to the less command by using the pipe (`|`) character. Remember, you can press the `q` key to exit.

```bash
$ ps -ef | less
```


Learn how to read streams of text using the CLI.

Introduction

Creating an Ubuntu Virtual Machine with VirtualBox

Navigating the Filesystem

Working with Files and Directories

Streams Of Text

The Shell and Environment

Running and Managing Programs

Networking Tools

Automation

Additional Programs

Conclusion

Redirecting Streams of Text

The `ps` command

Redirecting Streams of Text

The ps command

The `ps` command