How to use adrci to tail the alert log

oracle@myhost:[PRODDB01]# adrci

ADRCI: Release 11.2.0.4.0 - Production on Wed May 28 15:06:44 2014

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

ADR base = "/u01/oracle"

Display which homes that exists, and set the homelocation to point to the database's home:

adrci> show homes

ADR Homes:
diag/rdbms/PRODDB01/PRODDB01
diag/tnslsnr/myhost/listener
adrci> set home diag/rdbms/PRODDB01/PRODDB01

Tail the log:

adrci> show alert -tail -f

Other handy comments related to the alert log:

show alert
show alert -tail 50
show alert -p "module_id='DBMS_SCHEDULER'"
show alert -p "module_id != 'DBMS_SCHEDULER'"
show alert -p "module_id LIKE '%SCHEDULER%'"

If you want to extract the Streams related statements from the alert log, you would use:

show alert -p "message_text like '%STREAM%'"

See also this post for searching in adr using adrci