Linux system administrator

Mahwish Irfan

Email:***************@*****.*** Phone # 732-***-**** Citizen

Professional Summary:

Highly motivated and talented systems administrator with over five years of experience in multiplatform Unix and Linux environments. Experiences involve deploying, configuring, installing, maintaining Linux based servers. Strong ability to solve complex problems, absorb new information, troubleshoot system related issues and adapt to evolving circumstances. Experience in collaborating in a team environment and accomplishing company goals set by senior management and in dealing with high level tasks. Working knowledge and experience with VMware, AWS, and automation tools such as Ansible and bash scripting.

UPS, New Jersey, N.J March 2020 - Present

Linux Systems Administrator

Automate installation methods and system imaging (Kickstart/Ansible).

Utilizing Nessus tool to rule out server vulnerabilities.

Understand and use essential tools for handling files, directories, command-line environments, and documentation.

Operate running systems, including booting into different run levels, identifying processes, starting, and stopping virtual machines, and controlling services.

Manage user accounts on Linux/windows Servers

Configure local storage using partitions and logical volumes.

Experienced in Ansible playbooks for application deployment, configuration management and system hardening.

Experience with monitoring/logging tools Grafana, Kapacitor and InfluxDB.

Worked in Ansible roles, handlers, ad hoc commands as well as inventory files.

Setup AWS infrastructure using EC2, S3, IAM, EBS and Security Groups.

Experienced of AWS Identity & Access Management.

Configure and maintain servers and networks hosted on Amazon Web Services

Responsible for user management on Cloud Using IAM policies and roles.

Experienced to use of AWS services include but not limited to IAM, S3, Glacier, Cloud Front, EC2, EBS, AMI, ELB, Cloud Watch, VPC, Launch Configuration and Cloud Formation.

Experience in virtualize environment with vSphere. Installing and configuring mentioning ESXI 6.7 on hosts, managing Vcenter and Datastores.

Spinning up new Linux, windows virtual Machine.

Manage users and groups, including use of a centralized directory for authentication.

Migrating virtual machine from one datastore to another.

Manage security, including basic firewall and SELinux Configuration.

Updating different RHEL release, from RHEL 6 or RHEL 7 or RHEL 8 using Redhat satellite

Monitored infrastructure capabilities and troubleshooting.

Monitor Server health through Nagios

Use shell scripting to automate system maintenance tasks.

Configuring system logging, including remote logging.

Decommission old equipment and making sure all the data is cleared off the system

Managed Disks and File systems using LVM on Linux

Backup Scheduling using the full and incremental backups on tapes and on external storages using rsync, scp, tar.

Scheduled various regular, periodic, future and queue tasks by using Cronjob.

Racking and stacking of new equipment, as well as running cables to provide connection, and configuring.

Configuring various RAID levels such as RAID 0,1,5 and 6 on physical servers.

Understanding of OSI Model, TCP/PI protocol suite (TCP, UDP, SMTP and FTP).

Packaging application installation using YUM and RPM in Linux.

Maintaining, supporting, troubleshooting, configuring, installing, and deploying upgrades on Linux servers.

Troubleshooting of day-to-day system and user problems including resolving issue tickets and documentation of the issues and their fixes.

Setting up of NFS, FTP and Samba file sharing services on Linux and Windows environments.

New York Presbyterian Hospital, New York, N.Y September 2017- February-2020

Linux system Engineer

●Proficient in configuring PXE Boot with Kickstart servers to initiate installation of RHEL (Red Hat)/CentOS 6/7.

●Worked on virtualized environment with VMware.

●Constructed ESXi hosts, managed vCenter, datastores, HA and DRS clusters, created templates, clones and new VM’s.

●Experience working with installing and provisioning servers (Dell PowerEdge R710 and HP ProLiant DL380 G7).

●Experienced with the use of AWS services include but not limited to IAM, S3, Glacier, Cloud Front, EC2, EBS, AMI, ELB, Cloud Watch, VPC, Launch Configuration and Cloud Formation.

●Setup and build AWS infrastructure using EC2, S3, IAM, EBS and Security Groups.

●Acknowledge of AWS Identity & Access Management

●Worked with S3 for hosting static websites as well as assigning life cycle policies for data was of infrequent usage.

●Responsible for user management on Cloud Using IAM policies and roles.

● Ansible playbooks for application deployment, configuration management and system hardening.

● Ansible roles, handlers, ad hoc commands as well as inventory files.

● Patch management using Red Hat Satellite and Ansible.

●Backup Scheduling using the full and incremental backups on tapes and on external storages using rsync, scp, tar.

●Manage systems routine scheduling jobs and enabling Cron jobs.

●Build and deployed PXE boot server with kickstart file for automated server deployment.

●Enhanced security in environment by opening specific ports, applying security patches and routing password changes.

●Configuring various RAID levels such as RAID 0,1,5 and 6 on physical servers.

●Configured various network services - DNS, LDAP, DHCP, NFS, NIS, Apache, Samba, SSH, FTP, Telnet, HTTP, HTTPS.

●User Account Management with NIS/LDAP.

●Good understanding of OSI Model, TCP/PI protocol suite (TCP, UDP, SMTP and FTP).

●Troubleshooting Linux network, security related issues, capturing packets using tools such as firewall, TCP wrappers, NMAP.

●Packaging application installation using YUM and RPM in Linux.

●Maintaining, supporting, troubleshooting, configuring, installing, and deploying upgrades on Linux servers.

●Troubleshooting of day-to-day system and user problems including resolving issue tickets and documentation of the issues and their fixes.

●Experience with Network Interface Card (NIC) Bonding/Teaming.

●Setting up of NFS, FTP and Samba file sharing services on Linux and Windows environments.

●Provide thorough Documentation of the various issues handled along with the resolution provided.

●Strong knowledge of Linux kernel configuration, performance monitoring and tuning.

●Responsible to manage disk space by creating physical volumes, volume groups, logical volumes (LVM) and file systems as per the need.

●Setup of NFS and Samba file sharing services on Linux and Windows environments.

●Day to day, hands on work building, patching, and maintaining Linux systems.

●Wrote some bash shell scripts for automation of everyday tasks.

●Good experience monitoring servers using Nagios.

Walmart, Bentonville, AR August 2014 - June 2017

Linux Systems Analyst

Installing, upgrading, and configuring Red Hat Linux 5.x, 6.x, 7.x using Kickstart Servers and Interactive Installation.

Installation and configuration of different Services: Apache Web Server, DNS - BIND, NTP and NFS.

Installed, upgrade and managed packages via RPM and YUM package management.

Manages systems routine backup, scheduling jobs and enabling Cron jobs.

Disk management (partitioning tools, swap space, LVM).

Installed and configured Logical Volume Manager to improve data management and RAID to improve redundancy.

knowledge of Linux kernel configuration, performance monitoring and tuning.

Performed tasks following the ticketing system BMC Remedy.

Managed routing backup using NetBackup.

Experience with racking/stacking Bare metal servers in datacenter.

Hands on experience creating and managing snapshots, templates and cloning VMs. As well as migrating VMs through Vmotion.

Monitored servers using Nagios

Established and maintained user accounts, assign file permissions and user passwords.

Implemented and maintained NIS.

Access and edit files securely using vi editor.

knowledge of network protocols such as TCP/IP.

Troubleshooting and providing resolutions for software issues.

Scanning hosts for vulnerabilities and remediating them.

Backed up important files using the tar, zip, gzip and other compressing utilities.

Troubleshoot and maintain the health of the systems while also assuring the networks are up and running.

Used SSH keys to log into remote servers for support and maintenance, transferring of files and remote execution of commands.

Decommissioned servers using company procedures

TECHNICAL SKILLS

Red Hat Enterprise Linux RHEL 5/6/7, CentOS 6/7/8, VMware, ESXI 5.5, LVM, File System (EXT3, EXT4, XFS), Nagios, TCP/IP, UDP, NIS, Patching Cronjobs, Raid Levels, PXE Boot, Kickstart, AWS, Ansible. Knowledge Container solution like Docker/Kubernetes.

Training: RHCSA from Red Hat training academy in NY 2014

Education: Bachelor’s in arts, Karachi / Pakistan 2000

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