Script For Automatically Clearing Contents of Log Files

for files in $IAS_ORACLE_HOME/instances/*/diagnostics/logs/OPMN/opmn $EBS_DOMAIN_HOME/sysman/log
do
for file in `ls $files/*`
do
echo "Clearing file: " $file
cat /dev/null > $file
done
done
for files in $IAS_ORACLE_HOME/instances/*/diagnostics/logs/OHS/EBS_web_component $EBS_DOMAIN_HOME/servers/*/logs $IAS_ORACLE_HOME/../wlserver_10.3/common/nodemanager
do
for file in `ls $files/*log* $files/*out*| grep -v lck`
do
echo "Clearing file: " $file
cat /dev/null > $file
done
done

https://docs.oracle.com/cd/E26401_01/doc.122/e22954/T202991T608080.htm#6808602