Irum Hafeez

Linux system Administrator/Engineer

adkxst@r.postjobfree.com 607-***-****

SUMMARY

Motivated Linux system Administrator with over 5 years of experience in the IT industry. Installed Configured and maintained the life cycle of the Linux based servers. Also good at keeping the stability and reliability of the production environment. Hands-on experience with troubleshooting/resolving incidents, tickets, service request following SLAs. Worked with various DevOps tools for daily tasks such as Docker for containerization, GIT for versioning, Ansible to automate tasks, and worked with the cloud base infrastructure using AWS. WORK HISTORY

Linux System Engineer

Dell Technologies, NYC, NY July 2019 – Current

• Work on provisioning, configuring, deploying, and administrating bare metal and VMware for virtual machines.

• Proficient in installation, configuration, performance tuning of RHEL 6, 7, and CentOS-based infrastructure.

• Wide experience in virtualization platforms with hypervisors like VMware Esxi Vsphere client and Vcenter.

• Experienced in changing kernel parameters tuning them for database deployments and for best performance.

• Configure NIC-bonding/channel-bonding on new builds for fault-tolerance, load-balance, and redundancy.

• Use Crontab for Job scheduling and automating system maintenance or administration. TECHNICAL SKILLS

• Operating Systems: RHEL 6, 7, CentOS 6,7

• Virtualization: Oracle virtual Box,

VMware, Vsphere, VCenter, AWS,

• Storage: NFS, LVM, RAID, S3

• Software Management: YUM and

RPM

• Servers: NFS, FTP, HTTP, DHCP, DNS

• File system: EXT4, XFS

• Database: MySQL, MariaDB

• Ticketing: Service now, Jira

• Monitoring Tool: Zabbix

• Performa nce tuning: CPU, Memory,

I/O

• User Management: Active Directory, LDAP

• Kernel tuning: parameters, Values,

modules

• Automation: Ansible, Bash scripting, AWX

• Cloud: AWS

• DevOps tools: Ansible Dockers, GIT

• Languages: YAML, Bash

• Performed quarterly patching as well as required patching in case of any vulnerability on Linux servers using automation tools such as Ansible.

• Manage and secure network on RHEL using Iptables, Firewall, Selinux and, solving network traffic/issues using tcpdump and traceroute.

• Experience with OS storage management by creating static and dynamic partitions using fdisk, and creating, modifying, mounting, and unmounting file systems.

• Proficient in setting up RAID levels (0, 1, 5, 6, and 10) and RAID level management on Dell (R series) and HP ProLiant (DL370 and DL380) servers.

• Created and managed Logical Volume using LVM to create volumes on the volume groups, and file systems, extending/reducing logical volumes and file systems.

• Managing NFS server and mount exported NFS resources at the client-side. And troubleshoot NFS related issues.

• Managing various applications HTTP, SSH, DNS, DHCP, TFTP, FTP, NFS, MySQL on different servers

• Perform backup using backup tools rsync, tar, snapshots also backup server configuration.

• Monitoring systems performance activities like CPU, Memory, Swap, and disk usage to ensure efficient performance, in addition to avoiding future issues.

• Use Zabbix to monitor network parameters and server resources maintaining uptime of 99.8% for the systems.

• Experience in Ansible configuration, deployment, and wrote Ansible playbooks to manage environments, configuration files, packages, user management, mount points, web applications.

• Using AD-HOC commands with regards to Ansible for the deployment and automation of day-to-day administrative tasks.

• Research and implement automated DevOps strategies, and learn new trends in DevOps implementation.

• Administrating and maintaining source control management system through GIT. Fixed merge issues, and managed GIT repositories.

• Use GIT for managing playbooks, scripts, Docker file/images, and application configuration files.

• Good experience in configuring AWS cloud infrastructure. Actively manage, improve, and monitor cloud services like EC2, S3, EBS, EFS, ELB, Built S3 buckets, and cloud watch.

• Installed and configured instances like EC2 in cloud using AWS, creating S3 Buckets, configured VPC as well as creating policies managing users and groups under AWS IAM Management with regards to security.

• Built S3 Buckets and managed policies for S3 Buckets and used S3 Bucket and Glacier for storage and backup on AWS.

• Resolved network related issues by testing with networking tools and modifying configuration. Experience in creating alarms and notifications for EC2 instances using Cloud Watch.

• Built and provision Docker images and containers. Running web applications in containers on Dockers.

• Experience with Kubernetes to orchestrate the deployment, Scaling and management of Docker containers.

• Using Service Now to provide effective resolution for incidents and tickets by using technical and analytical skills to accurately identify user needs and provide effective solutions. Linux System Administrator

Yahoo, Lockport, NY

January 2017 – May 2019

• Designed and implemented multiple Virtualization Infrastructures on VMware Hypervisor. Built and configured Virtual Linux Machines using ESXi and VSphere Client.

• Configured ILO and IDRAC on HP and Dell servers for remote console access, firmware upgrades, and troubleshoot hardware failures.

• Coordinated with team members to ensure server reliability and prevent unexpected downtime.

• Monitored and provided regular reports on system performance to pinpoint performance bottlenecks and on a need, basis selected various system options and parameters.

• Performance troubleshooting with tools like top, vmstat, iostat, netstat, traceroute.

• Meticulously installed, updated, and upgraded the packages using RPM and YUM to maintain a secure production environment.

• End-to-end automating the build process with the help of PXE, Kickstart, and maintaining the build process for optimal output.

• Setup SSH key-based authentication and resolve issues associated with SSH service, port, and configuration.

• Experience in transferring files across networks using protocols like SCP, SFTP, and FTP.

• Worked on security/Authorization of created users with limited and full root privileges.

• Responsible for complete user management which includes user accounts, groups, directories, and file permissions.

• Created and managed different file systems on demand considering the nature of the data. i.e. EXT3, EXT4, XFS.

• Installation and configuration of the Apache webserver on Linux platforms troubleshoot and access log files for errors and web access traffic.

• Managing systems routine backup as well as resolving issues related to backups.

• Performed collaborative root cause analysis to resolve network and software issues in production environments.

• Worked on network protocols i.e. TCP/IP, UDP, IPv4, and their configuration.

• Providing technical assistance to different teams like DEV, Application, Backup Teams in resolving production incidents.

• I created, maintained, and implemented detailed documentation, and SOPs. Jr. Linux System Administrator

XAXIS, NYC, NY

October 2015 – December 2016

• Optimized system performance by tracking daily system utilization, to determine if problems are imminent.

• Process administration and management like monitoring, start/stop/renice/kill various processes/sub- processes.

• Experienced in Linux security, Creating and pushing SSH keys to configure password-less SSH connection to remote servers for security and automation purposes.

• Configured NTP client on servers to synchronize time zone with the NTP server.

• Used Jira for ticket assessment and prioritization on daily basis including login issues, resetting passwords, permissions.

• Installed system-wide hardware components, confirming interoperation and compatibility with Linux-based software distributions.

• Resolved vulnerability by making improvements to network security.

• Administered effective user account management by creating, modifying, and deleting users, groups and assigning permissions to users and groups.

• Deployed new equipments and install applications, which enabled the customer to perform their function on updated equipment which leads to higher work output.

• Participated in 24/7 on-call support personnel for debugging or resolving issues. EDUCATION

Master’s in business administration (Marketing) Institute of Management Sciences 2011. Bachelors of Arts (Statistics) 2008.

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