PostgreSQL on the command line

I am just getting back into PostgreSQL.  Here are the things I had to learn today:

1.  Command line usage:

• su - postgres
• psql
• select version();

2.  Dumping data for import on another server

• pg_dump -o mydb -U postgres -W > mydb.sql
• -o has to do with oids (Not sure if I need this yet)
• -U is for user
• -W is for password.  It prompts when you run the command