htop is an interactive text-mode process viewer for Linux. On CentOS 7, you can install as below.
Step 1 : Download htop
# wget http://download-ib01.fedoraproject.org/pub/epel/7/x86_64/Packages/h/htop-2.2.0-3.el7.x86_64.rpm
Step 2 : Install htop
# yum localinstall htop-2.2.0-3.el7.x86_64.rpm
Step 3 : Now run htop as below.
# htop
That’s All !