LCA Linux System Installation & Configuration 3

Question 1

Which partition table format supports disks larger than 2TB and more than 4 primary partitions?

Accepted Answer

GPT

Answer

GUID Partition Table (GPT) supports disks over 2TB and allows up to 128 partitions by default, overcoming MBR's limitations.

Question 2

What does the 'noatime' mount option do?

Accepted Answer

Disables updating access timestamps on reads

Answer

The 'noatime' option prevents the kernel from updating the access time (atime) on every file read, reducing disk write overhead.

Question 3

Which command permanently sets the hostname on a systemd-based Linux system?

Accepted Answer

hostnamectl set-hostname newname

Answer

hostnamectl set-hostname writes the hostname to /etc/hostname and updates the running system simultaneously, making the change persistent.

Question 4

During Linux installation, the 'swap' partition is recommended to be at least what size for a system with 8GB RAM when hibernation is required?

Accepted Answer

16 GB

Answer

For hibernation to work, swap must be at least as large as the amount of RAM (8GB) plus some buffer, so 16GB is the safe recommendation.

Question 5

Which file controls which services are started at boot in a systemd system?

Accepted Answer

/etc/systemd/system/default.target.wants/

Answer

Symlinks in /etc/systemd/system/default.target.wants/ (or similar .wants directories) define which units are enabled to start at the default target.

(LCA) Certified Linux Administrator Practice Test