Capgemini Linux Administrator L2 Interview Questions and Answers

Q1. If a server patched with new kernel update after reboot server came up with old kernel only. How will you troubleshoot it ?
Ans. 
To troubleshoot a server that booted up with the old kernel after a new kernel update, check the bootloader configuration, verify the kernel installation, and review the update process.
• Check the bootloader configuration to ensure it is pointing to the correct kernel version.

• Verify the kernel installation to see if the new kernel was successfully installed.

• Review the update process to identify any errors or issues that ...read more
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Q2. What are the various commands to check the CPU , Memory utilization in Linux server ?
Ans. 
Various commands to check CPU and Memory utilization in Linux server.
• To check CPU utilization: top, mpstat, sar

• To check Memory utilization: free, vmstat, sar -r
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Q3. How will you create and add new disk to the system using LVM ? Write the commands of the process.
Ans. 
To add a new disk to the system using LVM, you need to initialize the disk, create a physical volume, extend the volume group, and finally extend the logical volume.
• Initialize the disk using fdisk or parted command

• Create a physical volume using pvcreate command

• Extend the volume group using vgextend command

• Extend the logical volume using lvextend command

• Resize the filesystem using resize2fs or xfs_growfs command
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Q1. Tell me about yourself
Ans. 
Experienced Linux Administrator with a passion for troubleshooting and optimizing systems.
• Over 5 years of experience managing Linux servers in a corporate environment

• Skilled in shell scripting, server configuration, and system monitoring tools like Nagios

• Strong problem-solving skills and ability to work well under pressure

• Certified in Red Hat Enterprise Linux (RHCE)

• Passionate about staying up-to-date with the latest te
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Q2. Can you let us know the skills other than mentioned skills in resume?
Ans. 
Some additional skills I possess include scripting languages, troubleshooting abilities, and strong communication skills.
• Proficiency in scripting languages such as Python, Bash, or Perl can be beneficial for automating tasks and improving efficiency.

• Strong troubleshooting abilities are essential for quickly identifying and resolving issues that may arise in a Linux environment.

• Effective communication skills are importa...read more
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Q1. How can I grant SFTP access exclusively to the user David?
Ans. 
Grant SFTP access exclusively to user David
• Create a new group specifically for David, e.g. 'davidgroup'

• Set the ChrootDirectory in the SSH configuration file to restrict David's access to a specific directory

• Add David to the 'davidgroup' and configure the necessary permissions for SFTP access
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Q2. How can a user be locked out after 6 unsuccessful password attempts for a duration of 30 minutes?
Ans. 
To lock a user out after 6 unsuccessful password attempts for 30 minutes, modify the PAM configuration file.
• Edit the PAM configuration file (/etc/pam.d/common-auth) to include the 'pam_tally2' module.

• Set the 'deny' option in the 'pam_tally2' module to lock the user out after 6 failed attempts.

• Specify the 'unlock_time' option in the 'pam_tally2' module to set the duration of the lockout period to 30 minutes.

• Example: aut
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The questions were very relevant.

Q1. What are the computer languages you know?
Ans. 
I am proficient in languages like Python, Bash, and SQL.
• Python

• Bash

• SQL
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Q2. Write a code in Java?
Ans. 
A Java code snippet showcasing basic syntax and functionality.
• Declare a class with a main method

• Create variables and assign values

• Use control structures like if-else or loops

• Print output using System.out.println()
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Q1. Do you opt for relocation?
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Q2. Where do want to see yourself in next 5 years?
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LVM RPM ANSIBLE SSH FTP NFS SAMBA ADVANCED PERMISION CREATE A USER

Q1. RELETE TO THE TOPIC AND BASIC DETAIL ABOUT MYSELF
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Q2. DEVELOP CAREER IN IT FIELD
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Q3. BASIC DETAIL MYSELF
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Q4. LINUX SYSTEM ADMIN
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Q5. DEVELOP CAREER IN FEATURE
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Q1. Why want to work in Tech m
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Q2. Why want to work in Tech M
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Q1. Tell me about yourself
Ans. My name is sumanth I'm from eluru and my graduation B. Tech mechanical from JNTUK university
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Q2. What is your strength and Weekness
Ans. My strength - creativity, flexibility, focused My weekends -hard skills, saying no and shy
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Q3. Why should we hire u
Ans. Because I'm hard worker who wants to help your company succeed
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Q1. How to scheduled cron job
Ans. 
To schedule a cron job, use the crontab command to edit the cron table file.
• Use the crontab -e command to open the cron table file for editing

• Add a new line to the file with the schedule timing and the command to be executed

• Save and exit the file to schedule the cron job
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Q1. What is sticky bit
Ans. 
Sticky bit is a permission in Unix/Linux that allows only the owner of a file to delete or rename it.
• Sticky bit is represented by a 't' in the permissions of a file or directory.

• When the sticky bit is set on a directory, only the owner of a file within that directory can delete or rename the file.

• Commonly used on directories like /tmp to prevent users from deleting each other's files.

• Example: chmod +t directory_name
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Q1. Tell me about yourself and salary discussion
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Q1. How to check Kernel and OS Version, How to change file permissions, Whar are the default permissions of few files, In which file user id and password stored, Network configuration stored in which file, How...read more
Ans. 
To check Kernel and OS Version, change file permissions, view default permissions of files, locate user id and password file, find network configuration file, and filter keywords.
• To check Kernel and OS Version: Use 'uname -a' command

• To change file permissions: Use 'chmod' command followed by permission code and file name

• Default permissions of few files: For example, /etc/passwd has 644 permissions

• User id and password s...read more
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Q2. What is LVM, Explain LVM Architecture, What is Raid, What is the booting process of RHEL, How to manage failed unmount or mount, What are the issues you have faced in working with Linux Servers, What is sp...read more
Ans. 
LVM is Logical Volume Manager used for managing disk space, RAID is Redundant Array of Independent Disks for data protection, RHEL boot process involves BIOS, GRUB, kernel loading, and init process.
• LVM allows for dynamic resizing of logical volumes without downtime.

• RAID combines multiple disks for data redundancy or performance improvement.

• RHEL boot process involves BIOS POST, GRUB bootloader, kernel loading, and init ...read more
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