Linux 100 + Realtime Scenario Based Interview Questions and Answers Explained in Detail | Part - 1


Summary

The video delves into Linux interview questions and answers, stressing the importance of Linux skills across IT roles like system administrators and DevOps engineers. It covers scenarios like modifying user expiration settings with the 'chage' command for account security and discusses separating /etc/passwd and /etc/shadow files for security. The speaker addresses challenges like unmounting file systems and emphasizes the need for effective data restoration techniques post-reboot. Important topics include managing inode usage, setting permissions like the sticky bit, and handling file system issues for optimal system performance.


Introduction to Linux Interview Questions

The speaker introduces the topic of Linux interview questions and answers, highlighting the importance of Linux skills for various roles in IT, including system administrators, cloud administrators, and DevOps engineers.

Importance of Linux Skills

Emphasizes the significance of Linux skills for all IT professionals, irrespective of their experience level or specific job role, due to the foundational role of Linux in running applications and servers.

Linux Interview Question on User Expiration

Discusses a scenario-based Linux interview question related to user expiration and the 'chage' command for modifying user expiration settings to ensure account security.

Linux Interview Question on File Permissions

Explains the significance of separating /etc/passwd and /etc/shadow files for security reasons and further discusses potential security risks associated with file permissions and root user access.

Linux Interview Question on Listing Open Files

Addresses a common interview question about listing files by their PID (Process ID) using the 'ls -p' command to view open files linked to specific processes.

Linux Interview Question on Unmounting File System

Explores a situation where an IT professional faces challenges in unmounting a file system and provides a solution involving identifying and terminating processes using the file system.

Linux Interview Question on Checking File System after Reboot

Discusses the importance of file system recovery after a reboot and highlights the need to adapt to specific file system features for effective data restoration in case of corruption.

Linux Interview Question on Inode Issue

Explains a common interview question related to inode-related file system issues, emphasizing the significance of monitoring inode usage and managing unwanted large files to ensure system performance.

Linux Interview Question on Setting Sticky Bit

Addresses a frequently asked question about setting the sticky bit (s) for directory permissions, explaining its role in restricting deletion rights for non-owners and providing examples of setting permissions numerically or symbolically.

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