Explanation
"mkdir" is short for "make directory". You use this command to create folders.
Examples
# Basic example
mkdir foldername
# This will create a folder called "foldername".# Create a folder path
mkdir -p foldername/subfolder/subsubfolder
# This will create a folder called "foldername", with a folder called "subfolder" inside, with a folder called "subsubfolder" in.
# -p stands for path