env:tldr:7bdea

The command "env -i ${program}" clears the environment variables and runs the specified program.

Here's a breakdown of the command:

• "env" is a command in Unix-like systems that allows you to run a command in a modified environment.
• "-i" option instructs the "env" command to start with an empty environment, meaning it will clear all the environment variables.
• "${program}" represents a variable that should be replaced with the name or path of the program you want to run.

By using the "env -i" part of the command, you ensure that the program will run in an environment where no previous environment variables are set. This can be useful in situations where you want to control the exact environment for a program, without any interference from existing variables.