How to build physical standby db in 10gr2

–Here are the test enviroment and steps:
– Two machine:
– Machine A: 172.16.100.29 primiary db, Red Hat Enterprise Linux ES release 3 (Taroon Update 5)
– Machine B: 172.16.100.21 standby db, Red Hat Enterprise Linux ES release 3 (Taroon Update 5)
–1.install primiary db on machine A oracle_sid=std1
 
–2.Machine A:
SQL> conn / as sysdba
Connected to an idle instance.
SQL> [...]