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System Administration Fundamentals Flashcards

6 cards from real IKM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 System Administration Fundamentals flashcards as text

  1. What is the purpose of systemd?

    Answer: Initialize the system, manage services, and handle system state

    systemd is the init system and service manager for modern Linux, PID 1.

  2. What does /etc/fstab define?

    Answer: File systems to mount automatically at boot

    /etc/fstab defines which file systems are mounted during startup.

  3. What is the difference between TCP Wrappers and iptables?

    Answer: TCP Wrappers controls at application level; iptables filters at kernel level

    TCP Wrappers uses hosts.allow/deny for services; iptables provides kernel-level packet filtering.

  4. What is RAID?

    Answer: Technology combining multiple disks for performance, redundancy, or both

    RAID combines multiple physical disks into a logical unit.

  5. What is log rotation?

    Answer: Managing log size by archiving, compressing, and removing old logs

    Log rotation prevents log files from consuming all disk space.

  6. What is a container vs a virtual machine?

    Answer: Containers share host kernel; VMs run separate operating systems

    Containers share the host kernel and isolate processes; VMs run complete guest OSes.