postgresql

 1#change to user postgres
 2sudo -i -u postgres
 3
 4#get into sql-mode
 5psql
 6
 7#create new role
 8createuser --interactive
 9
10#list dbs
11\l
12
13#select db
14\c database-name
15
16#list tables
17\dt
18
19#exit postgres
20\q