feat: add bash commands review content (#59192)

Co-authored-by: Zaira <33151350+zairahira@users.noreply.github.com>

curriculum/challenges/english/25-front-end-development/review-bash-commands/6724e387ee098d1ef33108ba.md

@@ -7,7 +7,71 @@ dashedName: review-bash-commands
 
 # --description--
 
-Description placeholder
+## Terminal, Shell, and Command Line Basics
+
+- **Command line**: A text interface where users type commands.  
+- **Terminal**: The application that provides access to the command line.  
+- **Terminal emulator**: Adds extra features to a terminal.  
+- **Shell**: Interprets the commands entered into the terminal (e.g., Bash).  
+- **PowerShell / Command Prompt / Microsoft Terminal**: Options for accessing the command line on Windows.  
+- **Terminal (macOS)**: Built-in option on macOS, with third-party alternatives like iTerm or Ghostty.  
+- **Terminal (Linux)**: Options vary by distribution, with many third-party emulators like kitty.  
+- **Terminology**: Though "terminal," "shell," and "command line" are often used interchangeably, they have specific meanings.  
+
+
+## Command Line Shortcuts
+
+- **Up/Down arrows**: Cycle through previous/next commands in history.
+- **Tab**: Autocomplete commands.
+- **`Control+L`** (Linux/macOS) or typing `cls` (Windows): Clear the terminal screen.
+- **`Control+C`**: Interrupt a running command (also used for copying in PowerShell if text is selected).
+- **`Control+Z`** (Linux/macOS only): Suspend a task to the background; use `fg` to resume it.
+- **`!!`**: Instantly rerun the last executed command.
+
+## Bash Basics
+
+- **Bash** (Bourne Again Shell): Widely used Unix-like shell.  
+  Key commands:
+
+  - **`pwd`**: Show the current directory.
+  - **`cd`**: Change directories.
+    - **`..`** refers to the parent directory (one level up).
+    - **`.`** refers to the current directory.
+  - **`ls`**: List files and folders.
+    - **`-a`**: Show all files, including hidden files.
+    - **`-l`**: Show detailed information about files.
+  - **`less`**: View file contents one page at a time with navigation options, including scrolling backward and searching.
+  - **`more`**: Display file contents one screen at a time, with limited backward scrolling and basic navigation.
+  - **`cat`**: Show the entire file content at once without scrolling or navigation, useful for smaller files.
+  - **`mkdir`**: Create a new directory.
+  - **`rmdir`**: Remove an empty directory.
+  - **`touch`**: Create a new file.
+  - **`mv`**: Move or rename files.
+    - Rename: `mv oldname.txt newname.txt`
+    - Move: `mv filename.txt /path/to/target/`
+  - **`cp`**: Copy files.
+    - **`-r`**: Recursively copy directories and their contents.
+  - **`rm`**: Delete files.
+    - **`-r`**: Recursively delete directories and their contents.
+  - **`echo`**: Display a line of text or a variable's value.
+    - Use `>>` to append output to a file **without overwriting existing content** (e.g., `echo "text" >> file.txt`).
+  - **`exit`**: Exit the terminal session.
+  - **`clear`**: Clear the terminal screen.
+  - **`find`**: Search for files and directories.
+    - **`-name`**: Search for files by name pattern (e.g., `find . -name "*.txt"`).
+  - Use **`man`** followed by a command (e.g., `man ls`) to access detailed manual/help pages.
+
+## Command Options and Flags
+
+- **Options** or **flags**: modify a command's behavior and are usually prefixed with hyphens:
+  - **Long form (two hyphens)**:  
+    - Example: `--help`, `--version`
+    - Values are attached using an equals sign, e.g., `--width=50`.
+  - **Short form (one hyphen)**:  
+    - Example: `-a`, `-l`
+    - Values are passed with a space, e.g., `-w 50`.
+    - Multiple short options can be chained together, e.g., `ls -alh`.
+- **`--help`**: You can always use a command with this flag to understand the available options for any command.
 
 # --assignment--