Dawood Shahid

Linux Systems Administrator

Emigrant Bank

Elmsforst, NY

08.2021 - Current

Setting up and configuring virtual machines (VMs) in RHEL, CentOS, and OEL by utilizing templates, performing cloning, and creating snapshots of the VMs
Establishing a secure environment in RHEL 6 and RHEL 7 by effectively managing host-based firewalls
This includes tasks such as adding or removing services and adjusting port numbers within the firewall configuration
Performing Hot and Cold Migrations on VM using VMotion
Ensuring strong communication with all involved parties to achieve a high level of customer satisfaction by tracking requests, incidents, problems, and change tickets through their lifecycle, from creation to resolution, using Service Now
Utilizing pre-existing Ansible playbooks to coordinate the deployment of various tools across multiple environments, including development, testing, and production
Developed both pre-patching and post-patching playbooks to automate the server patching procedure using Ansible
Efficiently applying patches to Linux servers to eliminate vulnerabilities through automation using Ansible Tower and adhering to a change control process
Proficiency in branching, tagging, and managing version control across various environments utilizing the GIT version control system
Familiar with AWS cloud services like IAM, EC2 instances, S3 Bucket, EBS and EFS
Worked with Cloud watch to get a unified view of operational health and gain complete visibility of AWS resources, applications, and services running on AWS
Expertise in performing an automated, unattended over network installation using PXE boot method & Kickstart file
Setting up Logical Volume Manager (LVM) to manage volume groups, which includes creating physical volumes, migrating data, extending volume groups, creating various file systems like EXT3, EXT4, and XFS, mounting them, ensuring boot persistence, and extending logical volumes
Setting up NFS servers to facilitate file sharing, deploying and overseeing both the NFS server itself and its shared resources, and implementing restrictions for sharing based on subnets and domains
Established a local yum repository to facilitate package installations and configured and updated software necessary for supporting infrastructure applications
Engaged in disaster recovery efforts to ensure the ability to restore data in the event of a disaster or outage
Aiding the network team in diagnosing and resolving network-related problems, which includes tasks like assigning static or dynamic IP addresses through DHCP server configuration and hostname changes
Utilizing tools like tcpdump and Wireshark to capture, interpret, and analyze network packets, ensuring data security and promptly detecting any unauthorized access or potential attacks, while also addressing network issues
Effectively handled and resolved incident tickets submitted by clients and those flagged by an event monitoring system in a timely manner to meet the SLA requirements
Managed and resolved incident tickets open by clients as well as those logs by an event monitoring system timely manner to meet SLA
Employed Nagios as an IT infrastructure monitoring tool to oversee host resources, including processor load, disk utilization, system logs, as well as to monitor applications, services, and network protocols
Supporting application team by tuning Kernel, changing kernel parameters to customize features as client’s needs
Initiated case registrations with the vendor, implemented their recommendations, and applied patches supplied by the vendor
Actively engaged with the vendor by opening cases and working collaboratively to address issues, resolve bugs, and incorporate enhancements
Establishing user accounts, configuring passwords, defining privileges, enabling sudo access, and implementing key-based access through the exchange of SSH keys between machines to enhance security and safeguard system integrity
Configured Cronjobs to automate routine administrative tasks, perform database backups, and send email reminders at scheduled intervals.