Managing Oracle Alert Log Files

#!/bin/ksh
# makes a dated copy of the alert log and clears out the original
date=`date +"%m%d%y"`
cp /oradata02/PROD/admin/PROD/bdump/alert_PROD.log /oradata02/PROD/admin/PROD/bdump/alert_PROD.log.$date
rm /oradata02/PROD/admin/PROD/bdump/alert_PROD.log
touch /oradata02/PROD/admin/PROD/bdump/alert_PROD.log

remove_old_files.bsh

   #!/bin/bash
  
   # Works for Oracle databases pre-11g
   # 11g introduces universal diagnostic dest
 
   function quit {
     echo "${0} ORACLE_SID DAYS_OLD";
     exit;
   }

   # Make Sure Oracle instance name is passed
   if [ "" == "${1}" ]; then
    quit;
   fi;

   # Make Sure the Days Old argument is passed
   if [ "" == "${2}" ]; then
    quit;
   fi;
  
   # Set the Environment
   export ORACLE_SID=${1};
   export DAYS_OLD=${2};
   export ORAENV_ASK=NO;
   . oraenv;
  
   # Get the location for the bdump
   bdump=`${ORACLE_HOME}/bin/sqlplus -s /nolog <&ltEOF
    connect / as sysdba ;
    set head off;
    set feedback off;
    set verify off;
    select value from v\\$parameter where name='background_dump_dest';
    exit;
    EOF `

   # Get the location for the udump
   udump=`${ORACLE_HOME}/bin/sqlplus -s /nolog <&ltEOF
    connect / as sysdba ;
    set head off;
    set feedback off;
    set verify off;
    select value from v\\$parameter where name='user_dump_dest';
    exit;
    EOF `

    # Make sure the directories are valid and cleanup the files
   if [ -d ${bdump} ] && [ -d ${udump} ] ;  then
     echo "Removing old files at `date +%Y%m%d%H%M` for ${ORACLE_SID}" ;
     echo "Background Dump Before Cleanup `ls -l ${bdump} | wc -l`";
     echo "User Dump Before Cleanup `ls -l ${udump} | wc -l`";
     echo "Listener Log Dump Before Cleanup `ls -l ${ORACLE_HOME}/network/log | wc -l` ";
     find ${bdump} -mtime +${DAYS_OLD} -name "*" -type f -exec rm {} \;
     find ${udump} -mtime +${DAYS_OLD} -name "*" -type f -exec rm {} \;
     find ${ORACLE_HOME}/network/log -mtime +${DAYS_OLD} -name "*" -type f -exec rm {} \;
     echo "Background Dump After Cleanup `ls -l ${bdump} | wc -l`";
     echo "User Dump After Cleanup `ls -l ${udump} | wc -l`";
     echo "Listener Log Dump After Cleanup `ls -l ${ORACLE_HOME}/network/log | wc -l` ";
   fi;