To make a folder (also known as a directory) in Linux or Unix, use the mkdir command. For example:
mkdir folder_name
This will create a new folder named folder_name in the current working directory.
You can also specify the path where you want to create the folder. For example:
mkdir /path/to/folder_name
Note: Replace folder_name and /path/to/folder_name with the desired name and location for your folder.