WHM/Cpanel update and license problems

Update your Centos, from console/terminal run:
# yum update -y
# /scripts/upcp update all
If your WHM/Cpanel asks you to activate your license, and your license not yet expired, run this command
# /usr/local/cpanel/cpkeyclt
To show WHM/Cpanel version via terminal
# cat /usr/local/cpanel/version
11.64.0.33