TestOut Linux Pro Practice Test

Which command is necessary for creating three directories within an existing directory?

1. mkdir

2. rmdir

3. creatdir

4. dirmake

The correct answer is: mkdir

The command necessary for creating directories in Linux is `mkdir`, which stands for "make directory." This command can be used to create one or more directories at a time. When you want to create three directories within an existing directory, you can use the command followed by the names of the directories you wish to create. For example, executing `mkdir dir1 dir2 dir3` would create three directories named dir1, dir2, and dir3 in the current working directory. The other options do not pertain to creating directories in a Linux environment. The command `rmdir` is used to remove empty directories; `creatdir` and `dirmake` are not recognized commands in standard Linux command-line usage. Therefore, `mkdir` is the only correct command for this action.