The window, which is usually called the command line or command-line interface, is a text-based application for viewing, handling, and manipulating files on your computer. It's much like Windows Explorer or Finder on the Mac, but without the graphical interface. Other names for the command line are: cmd, CLI, prompt, console or terminal.
Later in this tutorial, you will need to have two command windows open at the same time. However, on some versions of Windows, if you already have one command window open and you try to open a second one using the same method, it will instead point you to the command window you already have open. Try it now on your computer and see what happens! If you only get one command window, try one of the other methods in the list above. At least one of them should result in a new command window being opened.
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In the tutorial, when we want you to type in a command, we will include the $ or >, and occasionally more to the left. Ignore the left part and only type in the command, which starts after the prompt.
OS X and Linux have a man command, which gives you help on commands. Try man pwd and see what it says, or put man before other commands to see their help. The output of man is normally paged. Use the space bar to move to the next page, and q to quit looking at the help.
Note thatthe directory name "Desktop" might be translatedto the language of your Linux account.If that's the case, you'll need to replace Desktopwith the translated name;for example, Schreibtisch for German.
PRO tip: if you type cd D and then hit tab on your keyboard, the command line will automatically fill in the rest of the name so you can navigate faster. If there is more than one folder starting with "D", hit the tab key twice to get a list of options.
If you're new to software development, it's easy to get carried away with the various terminology you'll need to learn. Worry less, you are not doing a spelling bee competition. Rather, you are meant to learn what these terms refer to, how they actually work, and how you can use them.
The Command Line Interface (CLI) is an editing environment that is text-based. It uses specified text (known as commands) to interact with the computer and perform numerous operations, including installing and working with programs.
The same thing goes for Cloud Providers such as AWS, GCP, Azure. Although the CLI bears different names across different platforms or packages, its purpose remains the same: to let you interact freely with the software package or the computer system using text-based instructions known as commands.
Using the program directory, go to your search bar (next to the Windows icon) and type cmd. This will pop up a list of all the command prompts available on your machine, including the default windows cmd. You can now select the one you wish.
Knowing where your CLI is located and how it works is a good step in the right direction. But let me show you how to get started with the CLI by practicing simple operations right from your Command Prompt.
Packages like Node.js (a development package for BackEnd Development) require that you install the Node Package Manager (npm). This package manager is what you'll use to install and run Node and other similar packages.
As you begin or advance in your tech journey, you'd need to install a lot of programs that are foreign to your Local Machine. Such programs may not have GUI installation methods and may require you to run a line of code or more on your CLI. At such a point, knowledge of using the CLI comes in handy.
All supported versions of Windows and Windows Server have a set of Win32 console commands built in. This set of documentation describes the Windows Commands you can use to automate tasks by using scripts or scripting tools.
Windows has two command-line shells: the Command shell and PowerShell. Each shell is a software program that provides direct communication between you and the operating system or application, providing an environment to automate IT operations.
The Command shell was the first shell built into Windows to automate routine tasks, like user account management or nightly backups, with batch (.bat) files. With Windows Script Host, you could run more sophisticated scripts in the Command shell. For more information, see cscript or wscript. You can perform operations more efficiently by using scripts than you can by using the user interface. Scripts accept all commands that are available at the command line.
PowerShell was designed to extend the capabilities of the Command shell to run PowerShell commands called cmdlets. Cmdlets are similar to Windows Commands but provide a more extensible scripting language. You can run both Windows Commands and PowerShell cmdlets in PowerShell, but the Command shell can only run Windows Commands and not PowerShell cmdlets.
A reference of exit and error codes for Windows Commands can be found in the Debug system error codes articles that may be helpful to understanding errors produced. Windows Commands also include command redirection operators. To learn more of their use, see Using command redirection operators.
You can configure the Command shell to automatically complete file and directory names on a computer or user session when a specified control character is pressed. By default this control character is configured to be the tab key for both file and directory names, although they can be different. To change this control character, run regedit.exe and navigate to either of the following registry keys and entries, depending on whether you wish to change the value for the current user only, or for all users of the computer.
Set these values to that of the control character you wish to use. See virtual key codes for a complete list. To disable a particular completion character in the registry, use the value for space (0x20) as it isn't a valid control character. The type of value for this registry entry is REG_DWORD, and can also be specified by hexadecimal or decimal value.
You can also enable or disable file and directory name completion per instance of a Command shell by running cmd.exe with the parameter and switch /F:ON or /F:OFF. If name completion is enabled with the /F:ON parameter and switch, the two control characters used are Ctrl-D for directory name completion and Ctrl-F for file name completion. User-specified settings take precedence over computer settings, and command-line options take precedence over registry settings.
The AWS Command Line Interface (AWS CLI) is a unified tool to manage your AWS services. With just one tool to download and configure, you can control multiple AWS services from the command line and automate them through scripts.
aws-shell is a command-line shell program that provides convenience and productivity features to help both new and advanced users of the AWS Command Line Interface. Key features include the following.
This topic describes how to install or update the latest release of the AWS Command Line Interface (AWS CLI) on supported operating systems. For information on the latest releases of AWS CLI, see the AWS CLI version 2 Changelog on GitHub.
The following are quick installation steps in a single copy and paste group based on whether you use 64-bit Linux or Linux ARM that provide a basic installation. For guided instructions, see the steps that follow.
(Optional) The following command block downloads and installs the AWS CLI without first verifying the integrity of your download. To verify the integrity of your download, use the below step by step instructions.
To update your current installation of the AWS CLI, add your existing symlink and installer information to construct the install command using the --bin-dir, --install-dir, and --update parameters. The following command block uses an example symlink of /usr/local/bin and example installer location of /usr/local/aws-cli.
The AWS CLI installer package .zip files are cryptographically signed using PGP signatures. If there is any damage or alteration of the files, this verification fails and you should not proceed with installation.
Download the AWS CLI signature file for the package you downloaded. It has the same path and name as the .zip file it corresponds to, but has the extension .sig. In the following examples, we save it to the current directory as a file named awscliv2.sig.
For a specific version of the AWS CLI, append a hyphen and the version number to the filename. For this example the filename for version 2.0.30 would be awscli-exe-linux-x86_64-2.0.30.zip.sig resulting in the following command:
For a specific version of the AWS CLI, append a hyphen and the version number to the filename. For this example the filename for version 2.0.30 would be awscli-exe-linux-aarch64-2.0.30.zip.sig resulting in the following command:
The warning in the output is expected and doesn't indicate a problem. It occurs because there isn't a chain of trust between your personal PGP key (if you have one) and the AWS CLI PGP key. For more information, see Web of trust.
Unzip the installer. If your Linux distribution doesn't have a built-in unzip command, use an equivalent to unzip it. The following example command unzips the package and creates a directory named aws under the current directory.
When updating from a previous version, the unzip command prompts to overwrite existing files. To skip these prompts, such as with script automation, use the -u update flag for unzip. This flag automatically updates existing files and creates new ones as needed. 152ee80cbc
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