Linux Total CPU idle
% snmpwalk -v 2c -c public localhost 1.3.6.1.4.1.2021.11.11.0
% snmpwalk -v 2c -c public localhost ssCpuIdle.0

Linux Total CPU Usage
% snmpwalk -v 2c -c public localhost 1.3.6.1.4.1.2021.11.11.0 | awk '{print 100-$4}'
% snmpwalk -v 2c -c public localhost ssCpuIdle.0 | awk '{print 100-$4}'

Linux Total CPU Usage For mrtg target
% snmpwalk -v 2c -c public localhost 1.3.6.1.4.1.2021.11.11.0 | awk '{print 100-$4 "\n" 100-$4}'  

Invididual CPU Usage (Windows 2003, Linux)
% snmpwalk -v 2c -c public localhost 1.3.6.1.2.1.25.3.3.1.2
% snmpwalk -v 2c -c public localhost hrProcessorLoad

Total CPU Usage (Windows 2003, Linux)
% snmpwalk -v 2c -c public localhost 1.3.6.1.2.1.25.3.3.1.2 | awk 'BEGIN {sum = 0;}; {sum += $4} ; END {printf("%d", sum/4)}'

Total CPU Usage For mrtg target (Windows 2003, Linux)
% snmpwalk -v 2c -c public localhost 1.3.6.1.2.1.25.3.3.1.2 | awk 'BEGIN {sum = 0;}; {sum += $4} ; END {printf("%d\n%d\n", sum/4, sum/4)}'

Get all mib value
% snmpwalk -v 2c -c public localhost > FILENAME.txt

Get all mib
% snmpwalk -v 2c -c public localhost > all_mib.txt

View all_mib.txt and find to need mib value

Example
In all_mib.txt FILE
HOST-RESOURCES-MIB::hrProcessorLoad.768 = INTEGER: 1

% snmpwalk -v 2c -c public localhost hrProcessorLoad.768

Total CPU idle in Linux (Using net-snmp)
% snmpwalk -v 2c -c public localhost 1.3.6.1.4.1.2021.11.11.0

http://www.nomachine.com
download --> NX Free Edition for Linux --> nxclient, nxnode, nxserver

% rpm -ivh nxclient-3.4.0-7.x86_64.rpm  nxnode-3.4.0-13.x86_64.rpm  nxserver-3.4.0-12.x86_64.rpm
% /etc/init.d/sshd restart
% /usr/NX/bin/nxserver --useradd USERNAME
or
% /usr/NX/bin/nxserver --useradd USERNAME --system

Edit following file
/etc/sysconfig/SuSEfirewall2
FW_SERVICES_ACCEPT_EXT="111.222.333.0/24,tcp,22 444.555.666.0/24,tcp,22 777.888.999.0/24,udp,161"

/etc/init.d/SuSEfirewall2_init restart
/etc/init.d/SuSEfirewall2_setup restart