How do you navigate to the parent directory in Linux?

To navigate to the parent directory in Linux, the command used is "cd ..". This command tells the shell to change the current directory to the directory one level above the current one, which is defined as the parent directory.

In Unix-like operating systems, the ".." symbol specifically refers to the parent directory of the current working directory. Therefore, executing "cd .." effectively moves the user up one directory level in the hierarchy.

The choice that includes "cd ../" is also a command that would navigate to the parent directory, but it is typically used for specifying relative paths when combined with specific directory names (e.g., "cd ../somefolder"). The other options, "cd -" and "cd back," do not accomplish this task. The "cd -" command is used to switch back to the previous working directory, and "cd back" is not a valid command in standard Linux usage.

By using "cd ..," you directly and effectively navigate to the parent directory.