Which directory stores system binaries (programs)?

• A. /bin
• B. /usr/bin
• C. /sbin
• D. /lib

Answer: (C)

System maintenance and boot-time tools live in the directory reserved for administrator binaries. These are the programs you use for system upkeep, repair, and early-boot tasks, typically used by root to manage the system. That’s why this directory is the right place: it contains system administration binaries such as fsck, mount, reboot, and other utilities essential for maintaining and booting the system.

In contrast, /bin holds essential user commands needed for normal operation by all users, /usr/bin contains broader user applications, and /lib stores shared libraries that support binaries rather than the programs themselves. Some distributions link /bin and /sbin to /usr/bin and /usr/sbin, but their roles remain focused on essential system vs. user-level functionality.