This command is used to create files.
# create a file called index.html
touch index.html
# create files index.html, style.css and app.js in just one command
touch index.thml style.css app.js
# to create a file with spaces on name, use "\ "(slash-space)
# create a file named "file spaces.txt"
touch file\ spaces.txt
# or just use single or double quotes
mkdir 'file spaces.txt'