{"id":111555,"date":"2026-05-26T11:45:07","date_gmt":"2026-05-26T06:15:07","guid":{"rendered":"https:\/\/www.guvi.in\/blog\/?p=111555"},"modified":"2026-05-26T11:45:09","modified_gmt":"2026-05-26T06:15:09","slug":"linux-interview-questions-and-answers","status":"publish","type":"post","link":"https:\/\/www.guvi.in\/blog\/linux-interview-questions-and-answers\/","title":{"rendered":"Linux Interview Questions and Answers (2026): Fresher to Expert Level"},"content":{"rendered":"\n

Linux is one of the most in-demand skills for developers, system administrators, and DevOps engineers in 2026. Whether you are a fresher walking into your first tech interview or an experienced professional preparing for a senior role, linux interview questions and answers will almost always come up. This guide covers the most commonly asked linux interview questions and answers across all levels, with crisp answers you can actually remember and use on the spot.<\/p>\n\n\n\n

Bookmark this page. Read it the night before your interview. That is all you need.<\/p>\n\n\n\n

Quick Answer<\/strong><\/p>\n\n\n\n

Linux interview questions and answers are asked across three levels in technical interviews: beginner (basic concepts and commands), intermediate (file systems, permissions, processes), and advanced (kernel, networking, shell scripting, performance tuning). The most asked topics are file permissions, process management, shell commands, user management, and networking basics.<\/p>\n\n\n\n

What Interviewers Actually Look For<\/strong><\/h2>\n\n\n\n

Before diving into the linux interview questions and answers, understand what interviewers want to see:<\/p>\n\n\n\n

    \n
  • Concept clarity:<\/strong> Can you explain what something is in simple words?<\/li>\n\n\n\n
  • Command knowledge:<\/strong> Do you know the right command for the right task?<\/li>\n\n\n\n
  • Practical thinking:<\/strong> Can you apply knowledge to solve a real system problem?<\/li>\n\n\n\n
  • Confidence under pressure:<\/strong> Do you know your basics cold or do you fumble?<\/li>\n<\/ul>\n\n\n\n

    The best way to use this guide is to read each question, cover the answer, and try to recall it yourself. That active recall builds the memory that holds up in an actual interview.<\/p>\n\n\n\n

    Prepare for technical interviews confidently with HCL GUVI\u2019s Interview Preparation Course<\/a>, where you\u2019ll strengthen your aptitude, problem-solving, coding, communication, debugging, and interview skills through structured lessons and practical exercises. This beginner-friendly program helps students and freshers improve technical confidence and prepare effectively for placement drives, coding rounds, HR interviews, and software engineering interviews.\u00a0<\/p>\n\n\n\n

    Level 1: Beginner Linux Interview Questions and Answers<\/strong><\/h2>\n\n\n\n

    These are guaranteed to be asked in every fresher and entry-level interview. Know all of these by heart.<\/p>\n\n\n\n

    1. What is Linux?<\/strong><\/p>\n\n\n\n

    Linux is a free, open-source operating system<\/a> kernel based on Unix architecture. It manages hardware resources and allows software to communicate with hardware. It is widely used in servers, mobile devices, embedded systems, and cloud infrastructure worldwide.<\/p>\n\n\n\n

    2. What is the Linux kernel?<\/strong><\/p>\n\n\n\n

    The kernel is the core of the Linux operating system. It acts as a bridge between hardware and software, managing CPU, memory, devices, and system calls. Everything else in the OS sits on top of the kernel.<\/p>\n\n\n\n

    3. What is the difference between Linux and Unix?<\/strong><\/p>\n\n\n\n

    Unix is a proprietary operating system developed at Bell Labs in the 1970s. Linux is a free, open-source reimplementation inspired by Unix. Linux is more widely used today and supports far more hardware platforms than Unix.<\/p>\n\n\n\n

    4. What is BASH?<\/strong><\/p>\n\n\n\n

    BASH stands for Bourne Again Shell. It is the default command-line interpreter on most Linux distributions. It processes user commands, runs scripts, and allows automation of tasks. It was written by Brian Fox for the GNU project.<\/p>\n\n\n\n

    5. What is a shell in Linux?<\/strong><\/p>\n\n\n\n

    A shell<\/a> is a command-line interface that lets users interact with the operating system by typing commands. It takes user input, passes it to the kernel for execution, and returns the output. Common shells include BASH, ZSH, and KSH.<\/p>\n\n\n\n

    6. What are the basic components of Linux?<\/strong><\/p>\n\n\n\n

    Component<\/strong><\/td>Role<\/strong><\/td><\/tr>
    Kernel<\/td>Core, manages hardware<\/td><\/tr>
    Shell<\/td>Interface between user and kernel<\/td><\/tr>
    File System<\/td>Organizes how data is stored<\/td><\/tr>
    System Libraries<\/td>Functions used by applications<\/td><\/tr>
    System Utilities<\/td>Basic tools like ls, cp, mv<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    7. What is the root directory in Linux?<\/strong><\/p>\n\n\n\n

    The root directory is represented by a single forward slash \/. It is the top-level directory of the entire Linux file system. All other directories, files, and mount points exist under the root directory.<\/p>\n\n\n\n

    8. What is the difference between absolute path and relative path?<\/strong><\/p>\n\n\n\n

    An absolute path starts from the root directory and gives the full location of a file, like \/home\/user\/documents\/file.txt. A relative path starts from the current directory, like documents\/file.txt. Absolute paths work from anywhere. Relative paths depend on where you currently are.<\/p>\n\n\n\n

    9. What does the pwd command do?<\/strong><\/p>\n\n\n\n

    pwd stands for Print Working Directory. It displays the full absolute path of the directory you are currently in. It is the fastest way to confirm your location in the file system.<\/p>\n\n\n\n

    10. What is the difference between the commands ls, ls -l, and ls -a?<\/strong><\/p>\n\n\n\n

      \n
    • ls<\/strong> lists all visible files and folders in the current directory<\/li>\n\n\n\n
    • ls -l<\/strong> shows a detailed long listing with permissions, owner, size, and date<\/li>\n\n\n\n
    • ls -a<\/strong> shows all files including hidden files that start with a dot<\/li>\n<\/ul>\n\n\n\n

      11. What are file permissions in Linux?<\/strong><\/p>\n\n\n\n

      Every file and directory in Linux has three types of permissions: read (r), write (w), and execute (x). These are assigned to three categories: owner, group, and others. Permissions control who can read, modify, or run a file.<\/p>\n\n\n\n

      12. How do you read the permission string -rwxr-xr–?<\/strong><\/p>\n\n\n\n

      Part<\/strong><\/td>Meaning<\/strong><\/td><\/tr>
      –<\/td>Regular file (d = directory)<\/td><\/tr>
      rwx<\/td>Owner has read, write, execute<\/td><\/tr>
      r-x<\/td>Group has read and execute only<\/td><\/tr>
      r–<\/td>Others have read only<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      13. What does the chmod command do?<\/strong><\/p>\n\n\n\n

      chmod stands for change mode. It changes the permissions of a file or directory. You can use symbolic mode like chmod u+x file.txt to add execute for the owner, or numeric mode like chmod 755 file.txt to set all permissions at once.<\/p>\n\n\n\n

      14. What does chmod 755 mean?<\/strong><\/p>\n\n\n\n

      755 breaks down as: owner gets 7 (read+write+execute), group gets 5 (read+execute), others get 5 (read+execute). Each digit is a sum of read=4, write=2, execute=1. 755 is the most common permission for public executables and directories.<\/p>\n\n\n\n

      15. What is the difference between cp, mv, and rm?<\/strong><\/p>\n\n\n\n

        \n
      • cp<\/strong> copies a file from one location to another, original stays<\/li>\n\n\n\n
      • mv<\/strong> moves a file to a new location or renames it, original is removed<\/li>\n\n\n\n
      • rm<\/strong> permanently deletes a file with no recycle bin<\/li>\n<\/ul>\n\n\n\n

        Level 2: Intermediate Linux Interview Questions and Answers<\/strong><\/h2>\n\n\n\n

        These linux interview questions and answers test your hands-on knowledge of processes, users, networking, and the file system<\/a>.<\/p>\n\n\n\n

        16. What is a process in Linux?<\/strong><\/p>\n\n\n\n

        A process is any running instance of a program in Linux. Every process has a unique PID (Process ID). Linux manages processes by allocating CPU time, memory, and resources to each one through the kernel’s process scheduler.<\/p>\n\n\n\n

        17. What is the difference between a foreground and background process?<\/strong><\/p>\n\n\n\n

        A foreground process runs directly in the terminal and blocks it until completion. A background process runs independently behind the terminal, freeing it for other commands. You can move a process to the background by adding & at the end of the command.<\/p>\n\n\n\n

        18. What does the ps command do?<\/strong><\/p>\n\n\n\n

        ps stands for process status. It displays a snapshot of currently running processes. ps aux shows all processes from all users with full details including PID, CPU usage, memory usage, and the command that started the process.<\/p>\n\n\n\n

        19. What is the difference between ps and top?<\/strong><\/p>\n\n\n\n

        ps gives a one-time static snapshot of running processes. top gives a live, continuously updating view of all processes sorted by CPU or memory usage. top is the go-to tool for real-time system monitoring in Linux interviews and real work.<\/p>\n\n\n\n

        20. How do you kill a process in Linux?<\/strong><\/p>\n\n\n\n

        Use the kill command followed by the PID. kill 1234 sends the default SIGTERM signal asking the process to terminate gracefully. kill -9 1234 sends SIGKILL which forces immediate termination with no cleanup. Always try SIGTERM before SIGKILL.<\/p>\n\n\n\n

        21. What is the difference between hard link and soft link?<\/strong><\/p>\n\n\n\n

        Feature<\/strong><\/td>Hard Link<\/strong><\/td>Soft Link (Symbolic Link)<\/strong><\/td><\/tr>
        Points to<\/td>Inode directly<\/td>File path<\/td><\/tr>
        Works across file systems<\/td>No<\/td>Yes<\/td><\/tr>
        Original deleted<\/td>Link still works<\/td>Link breaks<\/td><\/tr>
        Created with<\/td>ln file link<\/td>ln -s file link<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

        22. What is an inode in Linux?<\/strong><\/p>\n\n\n\n

        An inode is a data structure that stores metadata about a file: permissions, owner, size, timestamps, and disk block locations. It does not store the filename. The directory entry maps the filename to the inode number. Every file and directory has exactly one inode.<\/p>\n\n\n\n

        23. What is the grep command used for?<\/strong><\/p>\n\n\n\n

        grep searches for a specific pattern or text string inside files and prints matching lines. grep “error” logfile.txt finds all lines containing the word error. grep -r searches recursively through directories. grep -i makes the search case-insensitive.<\/p>\n\n\n\n

        24. What does the pipe operator | do in Linux?<\/strong><\/p>\n\n\n\n

        The pipe operator passes the output of one command as the input to the next command. For example, ps aux | grep nginx runs ps aux and feeds its output directly into grep to filter lines containing nginx. Pipes are fundamental to Linux command-line workflows.<\/p>\n\n\n\n

        25. What is the difference between > and >> in Linux?<\/strong><\/p>\n\n\n\n

        Both redirect command output to a file. The single > overwrites the file completely if it already exists. The double >> appends the output to the end of the file without deleting existing content. Always use >> when you want to keep existing data.<\/p>\n\n\n\n

        26. What is the find command used for?<\/strong><\/p>\n\n\n\n

        find searches for files and directories based on criteria like name, size, type, permissions, or modification time. find \/home -name “*.txt” finds all .txt files under \/home. find . -type f -size +10M finds files larger than 10MB in the current directory.<\/p>\n\n\n\n

        27. What is sudo in Linux?<\/strong><\/p>\n\n\n\n

        sudo stands for superuser do. It allows a permitted user to run a specific command with root (administrator) privileges without switching to the root account. It is more secure than logging in as root because it logs every privileged command executed.<\/p>\n\n\n\n

        28. What is the difference between su and sudo?<\/strong><\/p>\n\n\n\n

        su switches the entire session to another user account, typically root, requiring that user’s password. sudo runs only a single command with elevated privileges and requires the current user’s own password. sudo is safer and preferred in modern Linux systems.<\/p>\n\n\n\n

        29. How do you check disk usage in Linux?<\/strong><\/p>\n\n\n\n

          \n
        • df -h<\/strong> shows disk space usage of all mounted file systems in human-readable format<\/li>\n\n\n\n
        • du -sh foldername<\/strong> shows the total size of a specific folder<\/li>\n\n\n\n
        • df is for file system level. du is for directory and file level.<\/li>\n<\/ul>\n\n\n\n

          30. What is the \/etc\/passwd file?<\/strong><\/p>\n\n\n\n

          \/etc\/passwd is a plain text file that stores basic information about every user account on the system. Each line represents one user and contains username, UID, GID, home directory, and default shell. Passwords are not stored here in modern Linux. They are in \/etc\/shadow.<\/p>\n\n\n\n

          Level 3: Advanced Linux Interview Questions and Answers<\/strong><\/h2>\n\n\n\n

          These linux interview questions and answers are asked for senior developer, DevOps, and system administrator roles.<\/p>\n\n\n\n

          31. What is a zombie process in Linux?<\/strong><\/p>\n\n\n\n

          A zombie process is a process that has finished execution but still has an entry in the process table because its parent has not yet read its exit status. It consumes no resources except a PID slot. Too many zombies can exhaust the PID space.<\/p>\n\n\n\n

          32. What is a daemon in Linux?<\/strong><\/p>\n\n\n\n

          A daemon is a background service process that runs continuously without user interaction. It typically starts at boot time and waits for events or requests. Examples include sshd (SSH server), httpd (Apache), and cron (scheduled tasks). Daemon names often end in d.<\/p>\n\n\n\n

          33. What is cron and crontab in Linux?<\/strong><\/p>\n\n\n\n

          cron is the Linux task scheduler that runs commands automatically at specified times. crontab is the configuration file where you define scheduled jobs. A crontab entry has five time fields (minute, hour, day, month, weekday) followed by the command to run.<\/p>\n\n\n\n

          34. What does a crontab entry 0 2 * * * \/backup.sh mean?<\/strong><\/p>\n\n\n\n

          It means run \/backup.sh at 2:00 AM every day of every month on every weekday. The five fields are minute(0), hour(2), day(=every), month(<\/em>=every), weekday(*=every). The asterisk means “all values” for that field.<\/p>\n\n\n\n

          35. What is the difference between TCP and UDP in the context of Linux networking?<\/strong><\/p>\n\n\n\n

          TCP (Transmission Control Protocol) is connection-oriented, reliable, and ensures packets are delivered in order with error checking. UDP (User Datagram Protocol) is connectionless, faster, and does not guarantee delivery or order. Use netstat or ss commands in Linux to view active TCP and UDP connections.<\/p>\n\n\n\n

          36. What is the netstat command and what replaced it?<\/strong><\/p>\n\n\n\n

          netstat displays network connections, routing tables, and interface statistics. It has been deprecated in modern Linux distributions and replaced by the ss command, which is faster and more efficient. ss -tuln shows all listening TCP and UDP ports without resolving names.<\/p>\n\n\n\n

          37. What is the difference between a process and a thread in Linux?<\/strong><\/p>\n\n\n\n

          A process is an independent program with its own memory space. A thread is a lightweight unit of execution that shares memory with other threads inside the same process. Processes are isolated. Threads within a process share code, data, and file descriptors.<\/p>\n\n\n\n

          38. What is swap space in Linux?<\/strong><\/p>\n\n\n\n

          Swap space is a dedicated area on disk that Linux uses as virtual memory when physical RAM is full. It is slower than RAM but prevents the system from crashing due to out-of-memory errors. Use free -h to check RAM and swap usage. Use swapon and swapoff to manage swap.<\/p>\n\n\n\n

          39. What is the difference between \/etc\/hosts and DNS?<\/strong><\/p>\n\n\n\n

          \/etc\/hosts is a local file that maps hostnames to IP addresses on the machine itself. It is checked before DNS queries are made. DNS is a distributed network service that resolves hostnames globally across the internet. \/etc\/hosts takes priority over DNS by default on most Linux systems.<\/p>\n\n\n\n

          40. What is SELinux?<\/strong><\/p>\n\n\n\n

          SELinux (Security-Enhanced Linux) is a mandatory access control security module built into the Linux kernel. It enforces strict policies that restrict what processes and users can do beyond standard file permissions. It was developed by the NSA and is the default security module in RHEL, CentOS, and Fedora.<\/p>\n\n\n\n

          41. What is the difference between systemctl and service?<\/strong><\/p>\n\n\n\n

          service is the older command for managing init.d services. systemctl is the modern command for managing systemd services. Use systemctl start nginx, systemctl stop nginx, systemctl status nginx, and systemctl enable nginx for starting, stopping, checking status, and enabling on boot respectively.<\/p>\n\n\n\n

          42. How do you check system resource usage in Linux?<\/strong><\/p>\n\n\n\n

          Command<\/strong><\/td>What It Shows<\/strong><\/td><\/tr>
          top<\/td>Live CPU and memory per process<\/td><\/tr>
          htop<\/td>Enhanced visual version of top<\/td><\/tr>
          free -h<\/td>RAM and swap usage<\/td><\/tr>
          df -h<\/td>Disk space per partition<\/td><\/tr>
          iostat<\/td>CPU and disk I\/O statistics<\/td><\/tr>
          vmstat<\/td>Virtual memory and CPU stats<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          43. What is a runlevel in Linux?<\/strong><\/p>\n\n\n\n

          A runlevel defines the state of the system and which services are running. Traditional Linux uses runlevels 0 to 6. Modern systems using systemd replaced runlevels with targets. Runlevel 0 is shutdown, runlevel 6 is reboot, runlevel 3 is multi-user without GUI, and runlevel 5 is multi-user with GUI.<\/p>\n\n\n\n

          44. What is the difference between ext4, XFS, and Btrfs file systems?<\/strong><\/p>\n\n\n\n

          File System<\/strong><\/td>Best For<\/strong><\/td><\/tr>
          ext4<\/td>General purpose, most widely used, stable<\/td><\/tr>
          XFS<\/td>Large files, high-performance servers<\/td><\/tr>
          Btrfs<\/td>Advanced features like snapshots and checksums<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          ext4 is the default on Ubuntu and Debian. XFS is default on RHEL and CentOS. Btrfs is default on openSUSE and Fedora.<\/p>\n\n\n\n

          45. How do you troubleshoot a server that is unreachable over SSH?<\/strong><\/p>\n\n\n\n

            \n
          • Check network:<\/strong> ping the server IP to test connectivity<\/li>\n\n\n\n
          • Check SSH service:<\/strong> verify sshd is running with systemctl status sshd<\/li>\n\n\n\n
          • Check firewall:<\/strong> confirm port 22 is open with iptables -L or firewall-cmd –list-all<\/li>\n\n\n\n
          • Check logs:<\/strong> review \/var\/log\/auth.log or \/var\/log\/secure for SSH errors<\/li>\n<\/ul>\n\n\n\n

            Quick Reference: Most Important Linux Commands for Interviews<\/strong><\/h2>\n\n\n\n
            Category<\/strong><\/td>Command<\/strong><\/td>What It Does<\/strong><\/td><\/tr>
            Navigation<\/td>pwd, ls, cd<\/td>Show location, list files, change directory<\/td><\/tr>
            File ops<\/td>cp, mv, rm, touch, mkdir<\/td>Copy, move, delete, create file, create directory<\/td><\/tr>
            Permissions<\/td>chmod, chown, chgrp<\/td>Change permissions, owner, group<\/td><\/tr>
            Processes<\/td>ps, top, kill, bg, fg<\/td>View, monitor, stop, background, foreground processes<\/td><\/tr>
            Disk<\/td>df, du, mount, umount<\/td>Disk space, folder size, mount drives<\/td><\/tr>
            Networking<\/td>ping, ifconfig, ip, ss, netstat<\/td>Test connectivity, view interfaces, check ports<\/td><\/tr>
            Search<\/td>find, grep, locate<\/td>Find files, search content, quick file lookup<\/td><\/tr>
            Text<\/td>cat, less, head, tail, nano, vim<\/td>View and edit file content<\/td><\/tr>
            Users<\/td>useradd, passwd, usermod, su, sudo<\/td>Create users, change passwords, switch users<\/td><\/tr>
            System<\/td>uname, uptime, free, hostname<\/td>OS info, uptime, memory, hostname<\/td><\/tr>
            Logs<\/td>journalctl, dmesg, tail -f<\/td>View system logs and kernel messages<\/td><\/tr>
            Services<\/td>systemctl, service<\/td>Start, stop, enable, check services<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

            Tips for Cracking Linux Interview Questions and Answers<\/strong><\/h2>\n\n\n\n
              \n
            • Know your commands cold.<\/strong> Interviewers often ask what a command does or ask you to pick the right command for a task. The commands in the quick reference table above are the non-negotiables.<\/li>\n\n\n\n
            • Understand permissions deeply.<\/strong> chmod, chown, and reading permission strings are asked in almost every single linux interview. Know numeric and symbolic modes.<\/li>\n\n\n\n
            • Practice explaining processes.<\/strong> Questions about foreground, background, zombie, and daemon processes are very common in mid-level and senior interviews.<\/li>\n\n\n\n
            • Be ready for scenario questions.<\/strong> Senior interviews often say “the server is slow, what do you do?” Walk through top, free -h, df -h, and iostat systematically.<\/li>\n\n\n\n
            • Know the difference between similar tools.<\/strong> ps vs top, su vs sudo, > vs >>, hard link vs soft link. Interviewers love testing these pairs.<\/li>\n\n\n\n
            • Revise systemctl.<\/strong> In 2026, every Linux interview expects you to know systemd and systemctl commands for service management.<\/li>\n<\/ul>\n\n\n\n
              \n

              \ud83d\udca1 Did You Know?<\/h3>\n
                \n
              • Linux powers over 96 percent of the world’s top one million web servers as of 2026, making it the dominant server operating system on the planet.<\/li>\n
              • The Linux kernel had over 27 million lines of code as of 2024, contributed by thousands of developers from companies including Google, Intel, Red Hat, and Meta.<\/li>\n
              • Android, which runs on over 3 billion devices worldwide, is built on the Linux kernel, making Linux the most widely deployed operating system in history.<\/li>\n
              • The top command in Linux was created in 1984 by William LeFebvre and has been a staple of system monitoring for over 40 years.<\/li>\n <\/ul>\n<\/div>\n\n\n\n

                Conclusion<\/strong><\/h2>\n\n\n\n

                Linux interview questions and answers cover a wide range, but the pattern is consistent. Beginner questions test your knowledge of basic commands and concepts. Intermediate questions test processes, permissions, users, and file systems. Advanced questions test your ability to troubleshoot, optimize, and manage real systems.<\/p>\n\n\n\n

                The key to cracking linux interview questions and answers is not memorizing a hundred facts. It is understanding the logic behind each command and concept deeply enough to explain it simply. Read this guide. Revise the quick reference table. Practice on a terminal. You will walk into your next interview prepared for anything.<\/p>\n\n\n\n

                FAQs<\/strong><\/h2>\n\n\n
                \n
                \n
                \n

                1. What are the most commonly asked linux interview questions and answers for freshers?<\/strong><\/h3>\n
                \n\n

                The most commonly asked linux interview questions and answers for freshers cover what Linux is, the difference between Linux and Unix, basic commands like ls, pwd, cd, cp, mv, rm, file permissions and chmod, the difference between absolute and relative paths, and what BASH is. These appear in almost every entry-level interview.<\/p>\n\n<\/div>\n<\/div>\n

                \n

                2. How many linux interview questions and answers should I prepare for a technical interview?<\/strong><\/h3>\n
                \n\n

                For a fresher interview, preparing 20 to 25 linux interview questions and answers covering basic commands, permissions, and processes is enough. For mid-level roles, add process management, user management, and networking. For senior roles, include kernel concepts, systemd, performance tuning, and shell scripting.<\/p>\n\n<\/div>\n<\/div>\n

                \n

                3. Which Linux commands are asked most in interviews?<\/strong><\/h3>\n
                \n\n

                The most frequently asked commands in linux interview questions and answers are ls, chmod, chown, grep, find, ps, top, kill, df, du, ping, netstat or ss, systemctl, and cat. Knowing what each command does and when to use it is more important than memorizing every flag.<\/p>\n\n<\/div>\n<\/div>\n

                \n

                4. What is the difference between Linux and Unix asked in interviews?<\/strong><\/h3>\n
                \n\n

                In linux interview questions and answers, the key differences are: Linux is free and open-source while Unix is proprietary. Linux supports a far wider range of hardware. Linux has hundreds of distributions. Unix is used mainly in enterprise systems like Solaris and AIX. Both share similar architecture and commands.<\/p>\n\n<\/div>\n<\/div>\n

                \n

                5. How should I prepare linux interview questions and answers for a DevOps role?<\/strong><\/h3>\n
                \n\n

                For a DevOps role, focus on linux interview questions and answers covering shell scripting, cron jobs, process management, systemd and systemctl, file permissions, SSH and networking basics, log management with journalctl and tail, and performance monitoring with top, iostat, and vmstat. Hands-on practice on a Linux terminal is essential.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

                Linux is one of the most in-demand skills for developers, system administrators, and DevOps engineers in 2026. Whether you are a fresher walking into your first tech interview or an experienced professional preparing for a senior role, linux interview questions and answers will almost always come up. This guide covers the most commonly asked linux […]<\/p>\n","protected":false},"author":65,"featured_media":112235,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[719],"tags":[],"views":"28","authorinfo":{"name":"Jebasta","url":"https:\/\/www.guvi.in\/blog\/author\/jebasta\/"},"thumbnailURL":"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2026\/05\/Linux-interview-questions-and-answers-300x116.webp","jetpack_featured_media_url":"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2026\/05\/Linux-interview-questions-and-answers.webp","_links":{"self":[{"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/posts\/111555"}],"collection":[{"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/users\/65"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/comments?post=111555"}],"version-history":[{"count":2,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/posts\/111555\/revisions"}],"predecessor-version":[{"id":112237,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/posts\/111555\/revisions\/112237"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/media\/112235"}],"wp:attachment":[{"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/media?parent=111555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/categories?post=111555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guvi.in\/blog\/wp-json\/wp\/v2\/tags?post=111555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}