Install DTrace on Oracle Linux 7

1. Enable the ol7_UEKR6 yum repository for the system.

   For example, if you have yum-utils installed, you can run:

   sudo yum-config-manager --enable ol8_UEKR7

2. Install the dtrace and libdtrace-ctf packages.

   sudo yum install -y dtrace libdtrace-ctf