Final answer:
The not considered to be an advantage of Linux is user-friendliness.
Step-by-step explanation:
The subject of this question is Computers and Technology.
The grade level of this question is High School.
The not considered to be an advantage of Linux is D user-friendliness. Linux is known for many advantages, such as A cost, B customizability, and C security. However, when compared to other operating systems like Windows or macOS, Linux may require a steeper learning curve for users who are not familiar with command-line interfaces.