Did you want many dirs?

Creating directories/folders can be a laborious task if you need to make many especially if they are nested, this handy trick saves your bacon and makes life a lot easier!

# -p means create the whole structure if it doesn't exist
mkdir -p {dir1,dir2}/{a,b,c}/hello

# Output
crowzfx@pi-4b-3:/tmp/dir-blog$ tree
.
|-- dir1
|   |-- a
|   |   `-- hello
|   |-- b
|   |   `-- hello
|   `-- c
|       `-- hello
`-- dir2
    |-- a
    |   `-- hello
    |-- b
    |   `-- hello
    `-- c
        `-- hello

14 directories, 0 files

Easy-peasy, directory squeezy!