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for ((i=0; i<=2160; i++)); do uptime; sleep 120; done

use the below command

/usr/local/cpanel/bin/dcpumonview

the below installation for Linux ( Centos)

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm

yum install iftop

ps aux | awk ‘{print $4?\t”$11}’ | sort | uniq -c | awk ‘{print $2? “$1? “$3}’ | sort -nr | head

grep out_of_memory /var/log/messages

Please refer to below

Refer to the below URL

http://www.hosting.com/support/linux/evaluate-disk-usage-on-linux-plesk-server

You need to run this command

1- yum install php-mcrypt     if not help then you need to run2

2- yum install php53-mcrypt     if not help then this for sure will help 3

3-

rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
yum install php53-mcrypt



if you want to test you need to run this below
sudo vi /etc/php.d/mcrypt.ini
or
$ php -r "phpinfo();" | grep "mcrypt support"
if enabled then you should see    mcrypt support => enabled

Then restart the services

sudo /etc/init.d/httpd configtest

reference
http://osc.co.cr/2011/04/mcrypt-php-5-3-on-centos-5/
http://serverfault.com/questions/354871/how-to-install-mcrypt-for-php-5-3-3-on-centos-5-7-64-bit