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Posts Tagged ‘Unix shell scripts’

Unix shell scripts – Display Total, Used and Free Memory

August 18th, 2010 No comments

Bash script berikut akan menampilkan total memori yang digunakan dan yang tidak digunakan.
Buat file menggunakan editor dan simpan dengan nama mem.sh
Berikut source code-nya:

#! /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";
}'

Jalankan file : ./mem.sh

$ ./mem.sh
Memory Space Details
Total Memory space : 1000 MB
Used Memory Space : 31 MB
Free Memory : 968 MB
Swap memory Details
Total Swap space : 0 MB
Used Swap Space : 0 MB
Free Swap : 0 MB
Categories: Linux Tags:

Unix shell scripts – Display Logged in users and who is using high CPU percentage

August 18th, 2010 1 comment

Bash script ini berfungsi untuk menampilkan sedikit informasi mengenai user-user yang baru saja login dan apa yang mereka lakukan.
Source code : loggedin.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

Jalankan : ./loggedin.sh

Total number of unique users logged in currently
1

List of unique users logged in currently
tux-kecil

The user who is using high %cpu
0.00s tux-kecil    ttyp1    118.96.149.36    05:38    0.00s  0.08s  0.00s /bin/bash ./log

List of users logged in and what they are doing
 09:21:19 up 2 days, 23:37,  1 user,  load average: 0.00, 0.00, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
tux-kecil    ttyp1    118.96.149.36    05:38    0.00s  0.08s  0.00s /bin/bash ./log
Categories: Linux Tags:

Unix shell scripts – List Processes based on %CPU and Memory Usage

August 18th, 2010 No comments

Bash scripts berikut digunakan untuk mengetahui daftar proses dalam CPU dan penggunaan memori

$ pico processes.sh
#! /bin/bash

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

Sebelum menjalankan scripts tersebut, patikan Anda mempunyai hak akses exceute (chmod +x). Cara menjalankan script tersebut sebagai berikut:
Read more…

Categories: Linux Tags:

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