$ cd /home/oracle/delete

$ mkdir -p audit_file_dest background_dump_dest user_dump_dest core_dump_dest listenr_log_dest

$ sqlplus / as sysdba

SQL> show parameter dest

$ cd audit_file_dest

$ pwd

$ find audit_file_dest -mtime +30 -name \*.aud 

$ find audit_file_dest -mtime +30 -name \*.aud -exec mv {} /home/oracle/delete/audit_file_dest \;

$ find audit_file_dest -mtime +30 -name \*.aud

$ ls /home/oracle/delete/audit_file_dest

$ cd /home/oracle/delete

$ rm -rf audit_file_dest

$ cd background_dump_dest

$ pwd

$ find background_dump_dest -mtime +30 -name \*.tr*

$ find background_dump_dest -mtime +30 -name \*.tr* -exec mv {} /home/oracle/delete/background_dump_dest \;

$ find background_dump_dest -mtime +30 -name \*.aud

$ ls /home/oracle/delete/background_dump_dest

$ cd /home/oracle/delete

$ rm -rf background_dump_dest

$ cd background_dump_dest

cp alert_$ORACLE_SID.log alert_$ORACLE_SID.log.bak （确保空间足够）

SQL> alter system switch logfile;

SQL> show parameter dump
SQL> exit
$ cd /u01/app/oracle/diag/rdbms/db11g/db11g/trace
$ ls -lrt 

$ su oracle
$ lsnrctl set log_status off
$ mv listener.log listener.log.bak  （备份一下监听文件 ）
$ lsnrctl set log_status on （这时候会自动创建一个listener.log文件）

find . -mtime +10 -exec mv {} /home/oracle/delete/listenr_log_dest \;

$adrci

show alert

adrci> show alert

Choose the alert log from the following homes to view:

1: diag/rdbms/db1/db1
2: diag/tnslsnr/oracle/listener
Q: to quit
Please select option: 1

SHOW TRACEFILE

$ adrci

ADRCI: Release 11.2.0.4.0 - Production on Fri Jun 2 18:31:34 2017

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

ADR base = "/u01/app/oracle"
adrci> show home
ADR Homes:
diag/tnslsnr/db/listener

diag/rdbms/cams/cams
adrci> set homepath diag/rdbms/cams/cams
adrci> help purge

 Usage: PURGE [[-i <id1> | <id1> <id2>] |
   [-age <mins> [-type ALERT|INCIDENT|TRACE|CDUMP|HM|UTSCDMP]]]:

 Purpose: Purge the diagnostic data in the current ADR home. If no
   option is specified, the default purging policy will be used.

 Options:
 [-i id1 | id1 id2]: Users can input a single incident ID, or a
 range of incidents to purge.

 [-age <mins>]: Users can specify the purging policy either to all
 the diagnostic data or the specified type. The data older than <mins>
 ago will be purged

 [-type ALERT|INCIDENT|TRACE|CDUMP|HM|UTSCDMP]: Users can specify what type of
 data to be purged.

 Examples:
 purge
 purge -i 123 456
 purge -age 60 -type incident