This can be accomplished by using the dropdb and createdb command line wrappers

The syntax to create a new database on the command line is createdb [ options ] dbname

 

Example:

createdb -O user  new_database - E UTF8

This will create a new database called new_database and assign the user user to it and use the encoding UTF8

 

To drop a database on the command line the syntax dropdb [ options ] dbname is used.

 

Example:

dropdb new_database