Shell Programming and Scripting

#!/bin/sh

. /proddb/u01/app/oracle/dbtools/dba_email_list.sh
#echo $DBA_EMAIL

S=/proddb/u01/app/oracle/dbtools/
cat /dev/null > $S/filesystem%
df -k | egrep '/oraaudit' | awk '$4 ~ /^96%/ || $4 ~ /^97%/ || $4 ~ /^98%/ || $4 ~ /^99%/ || $4 ~ /^100%/' > $S/filesystem%
egrep -s "/" $S/filesystem%
case $? in
    0)
       mail -s  "Account Cust - file system above threshold on `hostname`" dbaemail@whatever.com < $S/filesystem%;;
    *)
       ;;

esac

FILESYSTEM=/path/subpath
if [ `df -k ${FILESYSTEM} | grep -v Use | awk '{ print $5 }' | sed 's/%//'` -gt 80 ]; then
  while [ `df -k ${FILESYSTEM} | grep -v Use | awk '{ print $5 }' | sed 's/%//'` -gt 50 ]; do 
    # do your file deleting here 
    echo "FS is greater than 50% full."
  done
else
  echo "Filesystem not too full yet"
fi

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda5            109530708  31173952  72792648  30% /path