CGI Group Linux Administrator Interview Questions and Answers

To troubleshoot network issues, start by checking physical connections, verifying network settings, testing connectivity, and analyzing network traffic.

• Check physical connections (cables, ports, etc.)

• Verify network settings (IP address, subnet mask, gateway, DNS)

• Test connectivity using tools like ping, traceroute, and netcat

• Analyze network traffic with tools like Wireshark or tcpdump

LDAP can be used to manage user accounts by storing user information in a centralized directory.

• Set up LDAP server and configure it to store user account information

• Use LDAP client tools to manage user accounts such as creating, modifying, or deleting accounts

• Authenticate users against LDAP server for access control

• Implement LDAP schema to define attributes and object classes for user accounts

I am a dedicated Linux Administrator with 5 years of experience in managing servers, troubleshooting issues, and implementing security measures.

• 5 years of experience in Linux administration

• Proficient in managing servers and troubleshooting issues

• Skilled in implementing security measures

• Familiar with scripting languages like Bash and Python

I am looking for a competitive salary based on my experience, skills, and the responsibilities of the role.

• Research the average salary range for Linux Administrators in your area

• Consider your level of experience and any specialized skills you bring to the role

• Be prepared to negotiate based on the responsibilities and expectations of the position

File system integrity can be checked using fsck command in Linux.

• Use fsck command to check and repair file system errors

• Run fsck on unmounted file systems for accurate results

• Use options like -y to automatically repair errors without user intervention

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

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

Use 'lsblk' command to scan for new hard drives attached to the system.

• Open terminal and type 'lsblk' command

• Check for any new devices listed in the output

• Alternatively, use 'fdisk -l' command to list all disks and partitions

To roll back updates, identify the update and use the appropriate command to remove it.

• Identify the update that needs to be rolled back

• Use the appropriate command to remove the update

• Verify that the rollback was successful