Shell Programming and Scripting

 
#!/bin/ksh 
# Test if shell script is being invoked from directory where script resides or from a different directory
if [[ $(dirname ${0}) = . ]] then
  CURRDIR=$PWD
  PROGNAME=${0}
  PROGDIR=${CURRDIR}
else
  CURRDIR=${0}
  PROGNAME=$(basename ${CURRDIR})
  PROGDIR=$(dirname ${CURRDIR})
fi
CURRENT_DT=$(date +"%Y%m%d_%H%M%S")
CURRENT_DT_MAIL=$(date +"%m-%d-%Y")

CORE=""
 while [ "$CORE" == "" ]
 do
 printf "\n Please enter the path: "
 read CORE
  # echo "\n Mail sent.."
 if [[ ! -d $CORE || "$CORE" == "" ]]
 then
  CORE=""
  echo "\n Invalid path or Path does not exist! Please enter a valid path." 
 fi
 done
### create file to save the output ###
OFILE=${CURRDIR}/unix_message_test4.txt

### command to find the top 10 directories####
echo "\n Reading directory..."
echo ${CORE}
echo ${CURRDIR}
USRSMSG=`du -k ${CORE}|sort -rn|head -10 > ${OFILE}`
exec 1>> ${USRSMSG}
exec 2>&1
# mailx -s "****Urgent**** Action Required | Unix Space Utilization | ${CURRENT_DT_MAIL}" "test@email.com" < ${OFILE}
echo "Mail sent successfully.."

USERS=`ls -ld /home/*/ |cut -c 17-24 > ${CURRDIR}/users_list.txt`

for users in `cat ${USERS}`
do
MAILTO="${users}@email.com"
CONTENT="${OFILE}"
SUBJECT="****Urgent**** Action Required | Unix Space Utilization | ${CURRENT_DT_MAIL}"
(
echo "To: ${MAILTO}"
echo "From: informatics@email.com"
echo "Subject: ${SUBJECT}"
echo "MIME-Version: 1.0"
echo "Content-Type: text/html"
echo "Content-Disposition: inline"
cat ${CONTENT}
) | /usr/sbin/sendmail -t

for users in ...
do
....
 done

IFS=":"
cut -f1,5 -d ":" /etc/passwd | while read userid comment       # Loop for all userids & comments

du                                                             # Display usage

cd ~abc123                                                     # Change to the home directory of user abc123

find . -type f -exec ls -l {} \; | sort -nk 5                  # List out files from current directory and below sorted in ascending size

find / -type f -user userid -exec ls -l {} \; | sort -nk 5     # List out all files owner by nominated user in ascending size