$4\mathrm{.}3$ Mark is setting up a new Linux workstation for his programming projects. Eager

to harness the power of open$-$source software, he explores a plethora of

repositories, each promising to offer a treasure trove of tools and libraries.

However, Mark recalls cautionary tales of compromised repositories and their

potential risks to his system's security and stability. As a sysadmin, explore the

reasons why Mark must carefully manage and control available repositories.

$[8$ marks$]$