LPIC-1 Certified Linux Administrator (101-500) Interview Questions

While some interviewers have their own style of questioning, most job interviews follow a set of questions and responses (including some of the most often-asked behavioral interview questions). Here are some of the most common interview questions, as well as some of the best answers. Based on the opinions of Linux experts, we have assembled Linux Interview Questions and Answers and published them in this blog. These Interview Questions will undoubtedly be beneficial to you during your interview. Let’s start with some professional advise on how to prepare for your LPIC-1 Certified Linux Administrator (101-500) interview:

1.How do you check a Linux server’s uptime?

You can use the uptime command to accomplish this. It can display you how long the Linux box has been running for. In addition, the w and top commands can be used to check the uptime.

2.What exactly do you mean when you say Red Hat Network?

Red Hat Network is a platform, particularly a system management platform, that enables users to effectively manage the lifecycles of various applications and operating systems. It aids in:

Installing and configuring new Linux systems.
Management of configuration files.
System updates.
Monitoring of performance.
The systems are being re-deployed for satellite and hosted deployment architectures.

3. In Red Hat Linux, how can a user rename a file?

To rename the file, you must first open the Red Hat Linux shell command line. You’ll need to utilise the “mv command” there. The programme will then navigate to both the original and freshly named files. Before renaming the files, double-check the parameters. If you neglect to mention the parameters, though, the command will prompt you to do so.

4. Can you clarify what Red Hat Linux’s goals are?

Red Hat Enterprise Linux can be used to customise the operating environment by users who are familiar with Red Hat Linux. Furthermore, it aids in the completion of some basic command-line chores as well as desktop productivity duties.

5.Can you describe what a Puppet Server is and how it works?

Yes, it is correct. This is, in general, a business application that is ideal for configuration management. A puppet server is a server that runs on a Unix-like operating system. To be more specific, this is an entirely open-source and fully automated application. This allows you to send configurations to puppet agents using codes. Puppet scripts can be used to perform vital activities such as updating user credentials, validating file permissions, and installing new software, among others.

6. How can I figure out what Red Hat version I have?

To do so, run the command “cat /etc/Redhat-release.” The result will display the version.

7. What command do I use to install Rpm packages?

You can use the yum and rpm command lines to install Rpm packages on CentOS and Red Hat.

8. Briefly describe the storage cluster?

During your job interview, you will be asked one of the most common Red Hat Linux System Administrator interview questions. When we talk about a cluster, we’re talking about numerous computers working together to complete a task. High performance, load balancing, high availability, and storage are all examples of clusters.

The storage cluster aids in delivering the best possible picture of the file system in the group’s servers. It substantially enhances the servers’ ability to write and read to a shared file system at the same time. Furthermore, storage administration is made easier by effectively restricting the patching and programme installation processes.

9. What is the difference between umask and ulimit, and how do I use them?

In general, ulimit is a built-in command in Linux that provides exceptional control over available resources when starting a process. Users can customise the limits.conf files to limit the range if they desire. Users can also change the sysctl.conf file to update the system settings. Umask, on the other hand, defines the usage file creation mask. When a user creates a directory or a file, umask assigns permissions to those directories and files.

10. Could you elaborate about SELinux?

SELinux is a Linux application that provides additional security features. SELinux protects the server from hacking and misconfiguration. This is used to gain access to the Linux Kernel’s control implementation. It sets a limit and then tells the servers that they can only access certain files and security policies.

11. What is the web port used to serve web pages when installing Apache?

Port 80 is used by the majority of web servers. As a result, when you install Apache, it defaults to Port 80. Users can, however, use some alternate ports. However, they will be forced to type a port into a browser in order to access the website. Port 8080 can also be used for this.

12. What is the difference between rgmanager and CMA?

One of the most difficult Red Hat Linux System Administrator interview questions is this one. So, when responding it, keep in mind to tell it in a transparent manner. Cman is a cluster manager, specifically a distributed cluster manager, in the Red Hat cluster. It works as part of a cluster node. It effectively tacks the cluster quorum by observing the cluster nodes, according to its functions. Cman is in charge of quorums, voting, communication, and cluster monitoring.

The rgmanager programme is a resource group manager. Rgmanager is in charge of gathering resource trees, resource groups, and services, which are all types of cluster resources. This greatly facilitates the definition, monitoring, and configuration of cluster services for a Red Hat administrator.

13. Could you explain DAS to me?

The solution, on the other hand, is pretty straightforward. It’s usually a block device that’s physically attached to the host computer. It includes a filesystem. The gadget can only be accessed by specified servers. Storage devices, near-dedicated resources, and server storage are examples. The DAS is a low-cost, simple-to-use device. It covers the technologies of SATA and SCSI.

14. Describe the LVM creation method in detail?

You’ll have to build it up gradually. Users must first construct physical volumes. They can do this by running the command “pvcreate /dev/sda2” (#pvcreate /dev/sda2). They must then add the physical volume to the volume group when it has been established. The command “vgcreate VLG0 /dev/sda2” can be used here (#vgcreate VLG0 /dev/sda2). Create a logical volume from the volume group now. #lvcreate -L 1G -n LVM1 VLG0 (#lvcreate -L 1G -n LVM1 VLG0) Users must use the “mke2f” command to create a file system on Sda2 in the last phase (#mke2fs -j /dev/VLG0/LVM1).

15. Could you please tell me more about the load balancing cluster?

The load balancing cluster, as its name implies, is used to distribute load evenly among cluster nodes. When the cluster sends the service request to a different cluster node, it works. Because numerous nodes can be designed to meet the load needs, this cluster enables low-cost scalability. If a node in this cluster fails, the cluster will notice the failure and assign the appropriate requests to other nodes. The node’s collapse will not be seen from outside the cluster in this case.

16. What exactly do you mean when you say LVM in LPIC-1 Certified Linux Administrator (101-500) ?

LVM stands for Logical Volume Manager in Red Hat Linux. It’s a storage management solution that allows Red Hat Linux System Administrators to divide a hard drive’s capacity into PVs (Physical Volumes). PV is then divided into VGs, or Volume Groups. The VG is further broken down into LVs, or Logical Volumes.

17. What is the difference between a SAN and a NAS in LPIC-1 Certified Linux Administrator (101-500)?

NAS runs a Red Hat Linux embedded OS on the fundamental hardware, such as the keyboard and display. Its primary goal is to validate clients and offer to share IP addresses with numerous systems or users on a network that requires a dedicated IP address to function. SAN, on the other hand, is an ideal block-level storage solution. It was created primarily to manage large amounts of data transfer. This is absolutely scalable in terms of performance and capacity.

18. Can you explain the phrases sgid and suid in LPIC-1 Certified Linux Administrator (101-500)?

When a user runs a file, suid provides the same degree of ownership permissions. When it comes to the sgid, it comes with a set of finished file privileges. While creating the directory, it inherits the ownerships.

19. What kind of encryption software may users use to encrypt communication over the internet in LPIC-1 Certified Linux Administrator (101-500)?

SSH, a dependable remote desktop software that allows users to control the Red Hat server remotely, can be used. Certain commands can be used to control it. Furthermore, SSH encrypts the data effectively. Port 22 is used by this programme.

20. What exactly is BASH in LPIC-1 Certified Linux Administrator (101-500)?

Brian Fox created Bash, a Unix shell and command processor for the GNU project. It is open-source software that replaces Bourne Shell. It’s an interpreted (rather than compiled) process that may be executed from a terminal window. This enables users to create commands and trigger events. Bash can read commands from shell scripts and execute them.

21. What exactly is LILO?

LILO stands for Linux Loader, and it is a boot loader for the Linux operating system. The majority of Linux operating systems use LILO to start the operations by booting the operating system into main memory.

22. What is the difference between a SAN and a NAS?

23. In Linux, how many different types of Shells are there?

In Linux, there are five shells:

C Shell (csh): It has a syntax similar to C and offers spell checking and job control.
Korn Shell (ksh) is a shell for the Korn programming language.
Z Shell (Zsh): It has some unique features, such as observing login/logout, generating file names, startup files, and closing remarks.
The Bourne Again Shell (bash) is the Linux distribution’s default shell.
Fish (Friendly Interactive Shell): It offers web-based configuration, auto-suggestions, and other features.

24. What is a swap space, and how does it work?

When the physical RAM memory runs out, Swap Space is utilised. The RAM inactive pages will be moved to the swap space. It can take the shape of a dedicated swap partition or individual swap files.

25. What are the variables in the environment?

They are dynamic values that have an impact on the way programmes run on a computer. Next, they can be found in any operating system and come in a variety of shapes and sizes. They can be created, updated, saved, and removed, and they also provide data about system behaviour.

26. What do the symbolic connections mean?

Its path will be used to redirect it to another file. There is no data in the target files. Symbolic connections point to a different location in the file system. The link to the target file is erased when the file is deleted, but not the file itself.

27. What do you mean by “hard links”?

On Linux, a hard link is another name for an existing file. For any file, we can generate an unlimited number of hard links. They have the ability to build links for other hard connections.

28. What is the definition of redirection?

The term “redirection” refers to the process of modifying the standard input and output devices. You can redirect the file or programme to redirect metacharacters.

29. What is the root account’s purpose?

The root user has full access to all files and commands by default. The root user has access to many features that an ordinary user does not, such as installing software, modifying file permissions, and so on.

30. In Linux, what is network bonding?

The technique of joining more than two network interfaces to establish a single network interface is known as network bonding. By improving network speed and bandwidth, it improves performance and redundancy. If one interface fails or is unplugged, the other will continue to function. The bonding process determines how the bonded interface behaves.

LPIC-1 Certified Linux Administrator (101-500) free practice test