Adding Bash commands to content/command-line/conepts/bash.md (#4970)

* Initial branch commit, added basic Bash commands to Bash.md

* cleaned up formatting for markdown

* [Concept Expanded] Aligned new bash.md content to match styling guide.

* Update bash.md

* Update bash.md

* Update bash.md

* Update bash.md

* Update bash.md

* Update bash.md

* Update bash.md

* Update bash.md

* Review changes

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Author: RalphEllis

content/command-line/concepts/bash/bash.md

@@ -43,3 +43,115 @@ Apple macOS featured Bash as the default from 2003 with OS X Panther (version 10
 ### Windows
 
 Bash is not the default shell for Windows operating systems, but it can be enabled through the Windows Subsystem for Linux (WSL). This runs a Linux environment without the need for a [virtual machine](https://www.codecademy.com/resources/docs/general/virtual-machines).
+
+### Bash Terminal Commands
+
+The basic terminal commands for navigating and manipulating directories and files are as follows -
+
+#### `cat` Command
+
+The `cat` (short for _concatenate_) command is used to display the contents of a file in the terminal. It can also be used to concatenate multiple files into one. By default, it outputs the contents of the file(s) to the terminal.
+
+```shell
+# Display the contents of a file
+cat filename.txt
+
+# Display the contents of multiple files
+cat file1.txt file2.txt
+
+# You can also use redirection to concatenate files into a new file
+cat file1.txt file2.txt > combined.txt
+```
+
+### Navigation Commands
+
+In Bash, navigation commands are used to move through directories and the file system efficiently.
+
+#### Print Working Directory Command
+
+Use the `pwd` command to display the current directory -
+
+```shell
+pwd
+```
+
+#### List Command
+
+Use the `ls` command to list the contents of the current directory -
+
+```shell
+# To list the contents of the current directory
+ls
+
+# Use the -l argument to get a detailed list with more information
+ls -l
+```
+
+> **Note:** If `ls` is used with the `-a` argument, it also shows hidden files.
+
+#### Change Directory
+
+The `cd` command is used to change directories -
+
+```shell
+# To go to a specific directory
+cd directoryPath
+
+# To go to the Previous Directory
+cd -
+
+# To go up one directory level
+cd ..
+```
+
+### Directory Management
+
+In Bash, directory management involves creating, deleting, moving, copying, and manipulating directories within the file system.
+
+#### Make a New Directory
+
+To create a new directory, use the `mkdir` command followed by the new directory name -
+
+```shell
+mkdir newDirectoryName
+```
+
+#### Remove a directory
+
+To delete a directory, use the `rmdir` command with the directory's name -
+
+```shell
+rmdir directoryName
+```
+
+### File Management
+
+In Bash, file management involves creating, deleting, moving, copying, and manipulating files within the file system.
+
+#### Create a new file
+
+To create a new empty file, use the `touch` command followed by the file name -
+
+```shell
+touch filename.txt
+```
+
+#### Remove a file
+
+To delete a file, use the `rm` command with the file name or file path -
+
+```shell
+rm filename.txt
+```
+
+#### Rename or move a file
+
+To rename a file or move it to a new location, use the `mv` command -
+
+```shell
+# Rename the file (original name is the first argument, new name is the second)
+mv oldFileName.txt newFileName.txt
+
+# Move a file to a different directory (source path is the first argument, destination path is the second)
+mv sourceDirectory/filename.txt destinationDirectory/filename.txt
+```