db2ilist - list instances
db2 attach to <instance> user <username> using <password> // this will attach to the instance as the specified user.
db2 create database feedb automatic storage yes
db2 list applications
db2stop
db2start
db2 list active databases
db2 list database directory show detail
db2 connect to feedb user <user_name> using <password>
db2 values current user
db2 values current schema
db2 -tvsf sample.sql
-t use semicolon as statement termination character;
-v verbose, echo input text to stdout
-s stop processing if error
-f file input
db2 list tables for all
db2 list tables for schema <schema_name>
db2 describe table <schema.table_name>
db2 select * from table