Answers for "postgresql ~~"

postgres

# Install postgres
sudo apt-get update
sudo apt-get -y install postgresql

sudo su - postgres
psql

for connection info : conninfo
for password : password

for roles : du
for database : l 
for relation : d
for table : dt

postgres

Fun fact: "Postgres" has exactly as many characters as "Database"
Check for yourself!
Postgres --> 8 chars!
Database --> 8 chars!