The dig command is not installed by default on Red Hat Enterprise Linux (RHEL) 8 systems. To install dig, you will need to use the dnf package manager.
Before installing dig, you should update the package database by running the following command:
sudo dnf update
This will update the package database and ensure that you have access to the latest packages.
Once the package database is updated, you can install dig using the following command:
sudo dnf install bind-utils
This will install the bind-utils package, which includes the dig command as well as other DNS utilities such as host and nslookup.
Once the installation is complete, you should be able to use the dig command on your RHEL 8 system.
Keep in mind that you will need to have root privileges (or be a member of the sudo group) in order to install new packages using dnf.