XK0-006 System Management Practice Question
Which directory in the FHS contains essential user command binaries that are needed in single-user mode?
⚠ Common exam trap
Watch out — candidates often confuse /sbin with /bin, assuming all essential binaries are in /sbin, but /sbin is specifically for system administration tools, while /bin holds the user command binaries required in single-user mode.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
/bin
The /bin directory, as defined by the Filesystem Hierarchy Standard (FHS), contains essential user command binaries (e.g., ls, cp, mv) that are required for booting, repairing, and operating the system in single-user mode. Single-user mode mounts only the root filesystem, so /bin must be on the root partition to provide these critical utilities without relying on other filesystems like /usr.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
/usr/bin
Why it's wrong here
/usr/bin contains non-essential user binaries, not guaranteed in single-user mode.
- ✗
/sbin
Why it's wrong here
/sbin contains system administration binaries.
- ✗
/opt/bin
Why it's wrong here
/opt is for optional software, not essential.
- ✓
/bin
Why this is correct
Correct: /bin contains essential user binaries.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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