List Processes based on %CPU and Memory Usage

#! /bin/bash
#List processes based on %cpu and memory usage

echo "Start Time" `date`
# By default, it display the list of processes based on the cpu and memory usage #
if [ $# -eq 0 ]
then

echo "List of processes based on the %cpu Usage"
ps -e -o pcpu,cpu,nice,state,cputime,args --sort pcpu # sorted based on %cpu
echo "List of processes based on the memory Usage"
ps -e -orss=,args= | sort -b -k1,1n # sorted bases rss value

# If arguements are given (mem/cpu)
else
case "$1" in
mem)
echo "List of processes based on the memory Usage"
ps -e -orss=,args= | sort -b -k1,1n
;;
cpu)
echo "List of processes based on the %cpu Usage"
ps -e -o pcpu,cpu,nice,state,cputime,args --sort pcpu
;;
*)
echo "Invalid Argument Given \n"
echo "Usage : $0 mem/cpu"
exit 1
esac

fi
echo "End Time" `date`
exit 0



===


$ processes.sh

$ processes.sh mem

$ processes.sh cpu

who is using high CPU percentage

apt-amd-02:/home/anujs/Downloads # cat uniqU.sh

#! /bin/bash

w > /tmp/a

echo "Total number of unique users logged in currently"
cat /tmp/a| sed '1,2d' | awk '{print $1}' | uniq | wc -l
echo ""

echo "List of unique users logged in currently"
cat /tmp/a | sed '1,2d'| awk '{print $1}' | uniq
echo ""

echo "The user who is using high %cpu"
cat /tmp/a | sed '1,2d' | awk '$7 > maxuid { maxuid=$7; maxline=$0 }; END { print maxuid, maxline }'

echo ""
echo "List of users logged in and what they are doing"
cat /tmp/a

find out Free memory ( shell script )

$ cat mem.sh
#! /bin/bash

# Total memory space details

echo "Memory Space Details"
free -t -m | grep "Total" | awk '{ print "Total Memory space : "$2 " MB";
print "Used Memory Space : "$3" MB";
print "Free Memory : "$4" MB";
}'

echo "Swap memory Details"
free -t -m | grep "Swap" | awk '{ print "Total Swap space : "$2 " MB";
print "Used Swap Space : "$3" MB";
print "Free Swap : "$4" MB";
}'