update index and add reference

PalomeroLab · Oct 14, 2024 · b2baadc · b2baadc
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diff --git a/docs/command-line/index.md b/docs/command-line/index.md
@@ -1,6 +1,12 @@
 # Linux
 
-Linux is a family of open-source Unix-like operating systems based on the Linux kernel. It's typically packaged in a distribution, which includes the Linux kernel along with a set of software tools and utilities. There are many different distributions of Linux, such as Ubuntu, Fedora, Red Hat, and CentOS.
+Linux is a family of open-source Unix-like operating systems based on the Linux kernel.
+It's typically packaged in a distribution, which includes the Linux kernel along with
+a set of software tools and utilities. There are many different distributions of
+Linux, such as Ubuntu, Fedora, Red Hat, and CentOS.
+
+In this guide, the "command line" refers to the interface between you and the
+shell. Checkout the [quick reference](quick-reference.md) for common commands.
 
 ## Concepts
 
@@ -11,7 +17,8 @@ Linux is a family of open-source Unix-like operating systems based on the Linux
 - **Shell**: The program that interprets and executes commands.
 
 > [!IMPORTANT]
-> When creating an instance on AWS, you're setting up a virtual machine that runs an operating system of your choice. For maximum compatibility with our software, use `Ubuntu 22.04 LTS` (on 64-bit x86).
+> When creating an instance on AWS, you're setting up a virtual machine that runs an operating system of your choice.
+> For maximum compatibility with our software, use `Ubuntu 22.04 LTS` (on 64-bit x86).
 
 ## Terminal
 
@@ -35,4 +42,5 @@ include:
 > For more information on `bash`, see the [Bash Guide](bash.md).
 > section.
 
-## Bash Scripting
+Read through the [bash guide](bash.md) for more information on the writing and
+executing shell scripts.
diff --git a/docs/command-line/quick-reference.md b/docs/command-line/quick-reference.md
@@ -0,0 +1,22 @@
+# Quick Reference of common Linux commands
+
+| Command  | Description                                                 |
+| -------- | ----------------------------------------------------------- |
+| `pwd`    | **p**rint **w**orking **d**irectory                         |
+| `ls`     | **l**i**s**t files and directories in the current directory |
+| `cd`     | **c**hange **d**irectory                                    |
+| `cp`     | **c**o**p**y files or directories                           |
+| `mv`     | **m**o**v**e or rename files or directories                 |
+| `touch`  | create an empty file                                        |
+| `mkdir`  | **m**a**k**e a new **dir**ectory                            |
+| `rm`     | **r**e**m**ove files or directories                         |
+| `wc`     | **w**ord **c**ount                                          |
+| `less`   | view the contents of a file                                 |
+| `head`   | view the first few lines of a file                          |
+| `tail`   | view the last few lines of a file                           |
+| `gzip`   | compress a file                                             |
+| `gunzip` | decompress a file                                           |
+| `curl`   | download the contents of a website                          |
+| `echo`   | print text to the terminal                                  |
+| `cat`    | concatenate and print files                                 |
+| `man`    | view the **man**ual for a command                           |