How do I create a new directory through a shell script in Linux?

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http://stackoverflow.com – I'm trying to create new directory /proj with subdirectories bin, cgi, sbin, etc... if /proj does not exist. However, instead of creating multiple subdirectories, it creates a single subdirectory named {Changes...src} #If project directory exists, then do not create a new one. if [ -d /proj ]; then echo "Project directory exists. New directory will not be created." #Otherwise, create a new project directory. else echo "Project directory does not exist. Creating a new project directory..." mkdir -p proj/{ (HowTos)