Final answer:
Use the 'cd ..' command in the Linux terminal to navigate back one directory.
Step-by-step explanation:
To go back a directory in the terminal on a Linux system, you can use the command cd ... The cd (change directory) command is used to navigate between directories in Linux.
When you append two dots (..) after cd, it signifies that you wish to move up one level in the directory structure.
This command tells the terminal to change the current working directory to the parent directory. After executing this command, you will be in the directory one level above the current one.
For example, if you are in the directory /home/user/documents and you want to go back to /home/user, you would use:
This command would take you back three levels up from your current directory.
Remember that the cd command without any arguments takes you to your home directory. If you want to navigate to a specific directory, you can provide the absolute or relative path as an argument: