DXC Technology Linux Server Administrator Interview Questions and Answers

NFS can be configured by setting up the NFS server, exporting directories, and configuring client access.

• Install NFS server package on the server

• Edit /etc/exports file to specify directories to be shared

• Restart NFS service to apply changes

• Configure client access by mounting NFS shares on client machines

Patching involves applying updates to software to fix vulnerabilities and improve performance.

• Identify the software that needs to be patched

• Download the necessary patches from the vendor's website

• Test the patches in a non-production environment before applying them to production systems

• Schedule a maintenance window to apply the patches

• Apply the patches using tools like yum, apt-get, or Windows Update

• Verify that the pat...read more

As a Senior Windows Administrator, I perform various activities such as OS upgrades, troubleshooting critical issues, and participating in Disaster Recovery activities.

• Activities include managing user accounts, installing software updates, monitoring system performance, and ensuring system security.

• OS upgrade process involves planning, testing compatibility, backing up data, performing the upgrade, and verifying system...read more

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

Networking is the practice of connecting devices to share resources. DNS cluster in Linux is a group of DNS servers that work together.

• Networking involves connecting devices to share resources such as files, printers, and internet access.

• DNS cluster in Linux is a group of DNS servers that work together to provide high availability and load balancing for DNS queries.

• DNS cluster can be configured using tools like BIND an...read more

Backups are copies of data that can be used to restore the original data in case of data loss or corruption. Ports are communication endpoints used for network connections.

• Backups are essential for data recovery in case of disasters or system failures

• Ports are identified by numbers and are used to establish connections between devices

• Common ports include HTTP (80), HTTPS (443), SSH (22), FTP (21), etc.