Ubuntu questions and answers
Ubuntu desktop, package management, updates, GNOME and basic administration.
These are practice variations, many generated from templates and numeric inputs, not an official question bank. They remain outside search indexing until at least 100 independently reviewed questions across five chapters are available.
Questions and clear answers
01Packages · foundation · Editorial previewWhat does sudo apt update do?+
It refreshes package-list metadata from configured software repositories; it does not itself install upgrades.
02Packages · foundation · Editorial previewWhat does apt upgrade do?+
It installs suitable available upgrades to installed software packages using APT's upgrade rules.
03Packages · foundation · Editorial previewWhat is a .deb package?+
It is a software-package format used by Debian, Ubuntu and other Debian-family distributions.
04Safety · foundation · Editorial previewWhy back up before a major Ubuntu upgrade?+
A verified independent backup protects documents if an upgrade fails or a compatibility issue occurs.
05APT packages · advanced · Editorial previewIn ubuntu — APT packages: On Ubuntu, a system has 2479 installed packages. Which APT command refreshes repository indexes without upgrading installed packages?+
sudo apt update refreshes the package indexes; it does not upgrade the 2479 installed packages.
06Terminal commands · foundation · Editorial previewIn ubuntu — Terminal commands: You are in the Linux shell working in directory /home/student/work-3278. Which command displays the absolute current directory?+
pwd prints the shell's current working directory; here it would show /home/student/work-3278 if that is the actual directory.
07File permissions · foundation · Editorial previewIn ubuntu — File permissions: A regular file named report-4077.txt is set to chmod 640. Which permissions do group members receive?+
640 means group has read-only permission (4), owner has read and write (6), and others have none (0).
08Disk partitions · intermediate · Editorial previewIn ubuntu — Disk partitions: A disk partitions activity has 4876 files using 2 MB each and 33 MB of extra files. Find total storage.+
Total = 4876 × 2 + 33 = 9785 MB, before filesystem overhead.
09GNOME desktop · foundation · Editorial previewIn ubuntu — GNOME desktop: A user on an Ubuntu GNOME desktop needs to locate an app named Example-676. Where can they browse installed applications?+
Open the GNOME application overview or app grid. The example app name does not imply it is actually installed.
10Package updates · advanced · Editorial previewIn ubuntu — Package updates: On Ubuntu, a system has 1475 installed packages. Which APT command refreshes repository indexes without upgrading installed packages?+
sudo apt update refreshes the package indexes; it does not upgrade the 1475 installed packages.
11RAM · intermediate · Editorial previewIn ubuntu — RAM: A device has 2274 MB free memory. Two tasks use 23 MB and 9 MB. How much free memory remains?+
Remaining free memory = 2274 − 23 − 9 = 2242 MB, assuming no other changes.
12Installation · foundation · Editorial previewIn ubuntu — Installation: A 3073 GB drive contains irreplaceable files. What must be done before repartitioning for OS installation?+
Back up and verify the files independently. Partition changes and installation can erase existing data.
13Backups · foundation · Editorial previewIn ubuntu — Backups: A backup plan covers 3872 GB and a verified copy stores 14 GB. How much has not yet been copied?+
Uncopied amount = 3872 − 14 = 3858 GB (assuming the same units and no duplicate data).
14Networking · intermediate · Editorial previewIn ubuntu — Networking: A networking transfer sends 37368 megabits at a steady 21 megabits/second. Find ideal transfer time.+
Time = size/rate = 37368/21 ≈ 1779.43 seconds, ignoring protocol overhead.
15File paths · advanced · Editorial previewIn ubuntu — File paths: A Linux shell is in /home/student/work-471. Is /etc/hosts an absolute path or a relative path?+
/etc/hosts is absolute because it begins at the filesystem root /, regardless of the current directory.
16Security · foundation · Editorial previewIn ubuntu — Security: An email asks the owner of device 1270 to install a 'security fix' from an unknown link. What should they do?+
Do not install it. Verify updates through the official vendor or operating system, and independently check the sender and domain.
17APT packages · intermediate · Editorial previewIn ubuntu — APT packages: On Ubuntu, a system has 2069 installed packages. Which APT command refreshes repository indexes without upgrading installed packages?+
sudo apt update refreshes the package indexes; it does not upgrade the 2069 installed packages.
18Terminal commands · foundation · Editorial previewIn ubuntu — Terminal commands: You are in the Linux shell working in directory /home/student/work-2868. Which command displays the absolute current directory?+
pwd prints the shell's current working directory; here it would show /home/student/work-2868 if that is the actual directory.
This is an educational practice preview. Answers and board-specific alignment are undergoing editorial review; these are not official exam questions.