20 Linux Ubuntu Interview Questions and Answers

Linux Ubuntu is a popular operating system that is used by many businesses and organizations. If you are applying for a position that requires Linux Ubuntu skills, it is important to be prepared to answer questions about your experience and knowledge. In this article, we review some of the most common Linux Ubuntu interview questions and provide tips on how to answer them.

Linux Ubuntu Interview Questions and Answers

Here are 20 commonly asked Linux Ubuntu interview questions and answers to prepare you for your interview:

1. What are the main features of Ubuntu?

Ubuntu is a Debian-based Linux operating system and distribution that is widely used for personal computers, servers, and internet of things devices. Some of the main features of Ubuntu include its ease of use, wide range of available software, and regular security updates.

2. Can you give me some examples of real-world applications for which Ubuntu is used?

Ubuntu is used in a variety of settings, from personal computers to servers to cloud computing and the Internet of Things. Some examples of real-world applications for which Ubuntu is used include the following:

-Web servers: Apache, Nginx, and Lighttpd are all popular web servers that can be run on Ubuntu.
-Application servers: Tomcat, JBoss, and Glassfish are all application servers that can be run on Ubuntu.
-Database servers: MySQL, MariaDB, and MongoDB are all database servers that can be run on Ubuntu.
-Cloud computing: Ubuntu is used extensively in cloud computing, both as a platform for cloud infrastructure and as a guest operating system in cloud environments.
-Internet of Things: Ubuntu is used in a variety of Internet of Things applications, from smart home devices to industrial control systems.

3. How do you install Ubuntu on your computer?

You can install Ubuntu on your computer in a few different ways. One way is to download the Ubuntu ISO file and then burn it to a blank DVD. Once you have done this, you can boot your computer from the DVD and follow the on-screen instructions to install Ubuntu. Another way to install Ubuntu is to use a USB flash drive. To do this, you will need to first download the Ubuntu ISO file and then use a program like Universal USB Installer to create a bootable USB flash drive. Once you have done this, you can boot your computer from the USB drive and follow the on-screen instructions to install Ubuntu.

4. What’s the difference between a standard and LTS version of Ubuntu?

The main difference between a standard and LTS (Long Term Support) version of Ubuntu is that the LTS versions are supported for a longer period of time. LTS versions are released every two years, and are supported for five years, while standard versions are released every six months and are only supported for nine months.

5. What is the usage of sudo?

sudo is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user, by default the superuser.

6. Is it possible to use Ctrl+Alt+Backspace to kill X server in Ubuntu 17.10 or later versions? If not, then how can you achieve this?

No, it is not possible to use Ctrl+Alt+Backspace to kill X server in Ubuntu 17.10 or later versions. Instead, you can use the systemctl command to achieve this.

7. What are some ways to uninstall an application from Ubuntu?

There are a few ways to uninstall an application from Ubuntu. One way is to use the Ubuntu Software Center. Another way is to use the apt-get command in the terminal.

8. What are the various types of package managers that can be used with Ubuntu?

The types of package managers that can be used with Ubuntu are apt, aptitude, and synaptic.

9. How can you start an application when Ubuntu boots up?

You can start an application when Ubuntu boots up by adding it to the Startup Applications list. To do this, open the Startup Applications Preferences window by going to System > Preferences > Startup Applications. Then, click the Add button and enter the name and command of the application you want to start up.

10. Which command would you use to check whether there’s any new update available for a particular application?

The command to check for updates for a particular application is “sudo apt-get update”.

11. What is the best way to find out the name of an application if you know only its process ID number?

The best way to find out the name of an application if you know only its process ID number is to use the “ps” command. With the “ps” command, you can view all of the processes that are running on a system, as well as their process ID numbers.

12. How can you change the working directory to “/usr/local”?

You can change the working directory to “/usr/local” by using the “cd” command. For example, you would type “cd /usr/local” into the terminal.

13. What is the purpose of “apt” in Linux?

APT is the Advanced Package Tool, and it is a set of tools used for managing software packages in Linux. With APT, you can install, remove, and update software packages on your system.

14. What does dpkg stand for? What is it used for?

dpkg is the Debian package manager. It is used to install, remove, and provide information about Debian packages.

15. What does apt-get do?

apt-get is a command-line tool that is used for installing, updating, and removing software on Ubuntu systems.

16. What is a PPA repository? How can you add one to your system?

A PPA repository is a Personal Package Archive, which is a third-party software repository for Ubuntu. You can add a PPA repository to your system by using the “add-apt-repository” command.

17. What is the difference between NFS and Samba?

NFS is a file sharing protocol that is designed to be used in a Unix/Linux environment, while Samba is a file sharing protocol that can be used in a Windows environment. NFS is typically faster than Samba, but Samba is more widely compatible.

18. What are the minimum hardware requirements for running Ubuntu?

The minimum hardware requirements for running Ubuntu are a 700 MHz CPU, 512 MB of RAM, and 5 GB of free hard drive space.

19. What are the differences between Debian and Ubuntu?

Debian is a Linux distribution that is known for its stability and reliability. Ubuntu is a Linux distribution that is based on Debian and is known for being user-friendly and easy to use.

20. Are there any other desktop environments besides Unity that work well with Ubuntu? If so, what are they?

There are a few other desktop environments that work well with Ubuntu, including Gnome, KDE, and Xfce. Each one has its own benefits and drawbacks, so it really depends on your personal preferences as to which one you would prefer to use.