Read Alert log file in 11G

in 11g there is no alert.log instead there is alert.xml and view the contents of this file Oracle provides a utility called ADRI see below on how to use this utility:

HOST: /rman01/u0001/oracle/diag/rdbms/adm1p/ADM1P/alert
>adrci

ADRCI: Release 11.2.0.1.0 - Production on Fri Oct 22 09:35:01 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

ADR base = "/rman01/u0001/oracle"
adrci>

adrci> help

HELP [topic]
Available Topics:
CREATE REPORT
ECHO
EXIT
HELP
HOST
IPS
PURGE
RUN
SET BASE
SET BROWSER
SET CONTROL
SET ECHO
SET EDITOR
SET HOMES | HOME | HOMEPATH
SET TERMOUT
SHOW ALERT
SHOW BASE
SHOW CONTROL
SHOW HM_RUN
SHOW HOMES | HOME | HOMEPATH
SHOW INCDIR
SHOW INCIDENT
SHOW PROBLEM
SHOW REPORT
SHOW TRACEFILE
SPOOL

There are other commands intended to be used directly by Oracle, type
"HELP EXTENDED" to see the list

adrci> show alert

ADR Home = /rman01/u0001/oracle/diag/rdbms/adm1p/ADM1P:
*************************************************************************
Output the results to file: /tmp/alert_7353_1_ADM1P_1.ado
"/tmp/alert_7353_1_ADM1P_1.ado" 2102 lines, 108992 characters
2010-08-25 16:59:50.107000 -04:00
Adjusting the default value of parameter parallel_max_servers