Red Hat Linux Administrator

ADEEL YOUNIS

Brooklyn, NY *****

Cell: 1-917-***-****

***********@*****.***

SUMMARY

Senior Linux Administrator with 9+ years of experience in the IT industry. Managed, administered, configured and maintained the life cycle of the computing environment of Linux based servers. Provisioning, deploying, configuring and also Keeping the stability, availability and reliability of the systems for a production environment. Excels in troubleshooting and resolving incidents, tickets, service requests. Introduced to DevOps tools for daily tasks using Ansible, Git, Docker. Looking for an environment to express my skills and knowledge to face new challenges. SKILLS

Operating System: Red Hat/ CentOS, 6,7,8

Network: DHCP, DNS, TCP/IP, UDP, FTP, HTTP

Infrastructure Server: NFS, NIS, SSH, FTP, Samba,

Apache, AWS, HTTP, DHCP, TFTP, NTP, DNS

Amazon Web Services Experienced with EC2, S3, VPC, IAM, Cloud watch

Pxe boot, Kickstart and RedHat Satellite for provisioning also used Terraform to provision .

RedHat Satellite Yum and rpm for PATCHING

File Systems: Ext3, Ext4, XFS, LVM, RAID Levels

Languages: Shell Scripting,Bash, YAML for Ansible

Storage: NAS, SAN, NFS, LVM.

worked with Dell Avamar for client backup support . Configuration Management with ANSIBLE

Github for Versioning Control of the Codes and Playbooks. Experience with creating DOCKER images from files and deploying containers from the images as required,

Supported CICD pipeline, supported deployments and followed runbooks to troubleshoot and their restoration. Supported Kubernetes service, pod, namespace

deployments and troubleshooting.

Ticketing: Service Now,BMC Remedy, Jira,

deployment and configuration ZABBIX, NAGIOS for

monitoring servers and network devices.

Responded to all Linux Problems as a part of an on call rotation and resolving issues promptly .

Basic Understanding of MySQL, SQL, MariaDB,

CLI, Managing, SSH

Rack and Stack build servers ILO, IDRAC, KVM

Interpersonal and Communication, Windows, Scripting Clones, Migration, Shell Scripting

Configuration Management, NAS, Switches

User Authentication Active Directory, Open LDAP

Client, Network File System, TCP/IP

Version control, Network, TELNET

Networking, Troubleshoot

DHCP, NIC, Troubleshooting

VMware: ESXi, VCenter, vSphere Client,

Clustering, HA, DRS, Snapshots. Upgrading hosts in VC Tuning: Performance Tuning, Kernel Tuning

Strong analytical skills and Documentation skills. Strong Interpersonal and Communication Skills.

United Parcel Service Mahwah NJ

Linux System Engineer 03/2022 to 08/2024

● Experience in monthly patching and remediation of vulnerabilities.

● Experience with Red Hat PCS/Veritas clusters, assisting application teams with cluster-related issues.

● Experience with ESXi host upgrades, clustering, and VMware, including building VMs and troubleshooting.

● Experience with automation using Ansible. Configured, managed, and deployed Ansible in the environment for POC and tests.

● Written Ansible playbooks to automate the pre/post patching checks and validations, and patching of systems.

● Written ansible roles for unification, portability and organization of the tasks and playbooks.

● Created Ansible projects mapping GIT repositories to deploy playbooks on target inventories.

● Experience in installing, configuring, and deploying using playbooks and ad-hoc commands in Ansible.

● Used GitHub to manage Ansible playbooks and experience with version control GIT to document through GitHub on CLI and GUI.

● Leveraged shell scripting to automate redundant administrative tasks.

● Working experience with public cloud infrastructure like AWS (Amazon Web Services) and managing AMI virtual machines on Elastic Compute Cloud (EC2).

● Familiar with AWS services such as EC2, S3, ELB, CloudWatch, CloudFront, and IAM in testing and development environments.

● Supported developers in the administration of Docker by pulling, running, stopping, and removing Docker images and containers.

● Experience spinning up virtual machines from CLI as well as Gui leveraging OpenShift.

● Granting user access to the Openshift cluster via role binding and cluster roles.

● Performing a QBC (Quality Build Test) on all newly built servers, fixing any issues.

● Built physical servers, configured ILO, iDRAC, storage needs, and FC networking while collaborating closely with the storage team.

● Installed and configured NFS server and NFS client; implemented Network File System (NFS) for file sharing in the environment over the network.

● Experience in installing and configuring volume/file system management, including Logical Volume Manager (LVM).

● Expert in Logical Volumes, manipulating them as required.

● Scheduled backups of systems using NetBackup and crond. Metropolitan Transportation Authority New York

Linux System Engineer 05/2020 to 02/2022

● Worked on cloud-based servers, overseeing deployment and maintenance.

● Collaborated with the infrastructure team to build bare metal servers, including rack and stack of Fiber Channel.

● Managed Dell EMC SAN storage, creating LUNs, file systems, and configuring LVM from the OS.

● Partnered with the Dell Avamar backup team to install Avamar client services agents on RHEL servers and register clients.

● Registered and maintained RHEL servers on Red Hat Satellite, synchronizing and publishing repositories; migrated the Linux environment from the old Red Hat Satellite to the new one.

● Maintained daily routine tickets and fixed file systems.

● Worked with Ansible Tower to schedule patching and wrote playbooks.

● Performed in-place upgrades from RHEL 7 to RHEL 8 using the Leapp utility, troubleshooting issues during the upgrade.

● Conducted monthly patching and resolved post-patching issues, including installing mail server clients.

● Worked with Red Hat IDM server installation and IDM client installation.

● Utilized ServiceNow for incidents, change management, tasks, and SLA tracking.

● Strong experience in provisioning, deploying, and configuring servers using Red Hat Satellite, PXE, and Kickstart.

● Experienced with Yum and RPM, creating application repositories and synchronizing application repos.

● Strong background in RHEL 6/7 Linux administration, performance tuning, and support.

● Provided support and troubleshooting for problems related to bootloaders like GRUB and ILO/iDRAC.

● Proficient in networking and configuring IP, DNS, NFS, Samba, SSH, DHCP, TFTP, and FTP.

● Experienced in the installation, configuration, and troubleshooting of the Apache web server.

● Managed capacity planning using Nagios, adding hosts and configuring thresholds.

● Deployed Linux virtual servers running RHEL 6, 7, 8, and CentOS.

● Deployed and configured Red Hat and CentOS in a VMware ESXi environment.

● Created templates and clones of virtual machines using the vSphere client. Bank of America Jersey City, NJ

Linux System Administrator 03/2017 to 03/ 2020

● Automated system management tasks such as user account creation and file system size monitoring.

● Tuned system performance to ensure optimal operation for applications running on the servers.

● Secured Linux systems by patching them in a timely manner and ensuring system integrity.

● Conducted regular security audits and vulnerability assessments to identify and mitigate potential threats.

● Applied security patches and updates promptly to ensure system integrity and protect against vulnerabilities.

● Implemented secure SSH configurations, including key-based authentication and disabling root login.

● Developed and enforced security policies and procedures to protect sensitive data and maintain compliance.

● Experienced with Active Directory domain controller, user management, and deployment.

● Gained exposure to VMware, ESXi, vCenter, vMotion, vConverter, HA, DRS, and FT.

● Configured virtual machines under VMware ESXi servers to install Red Hat Linux guests.

● Knowledgeable in kernel tuning.

● Resolved tickets, incidents, service requests, and change requests using BMC Remedy.

● Provided 24/7 support to users and operating systems in the environment.

● Troubleshot Linux servers using essential commands such as top, tcpdump, traceroute, telnet, and nslookup.

● Applied NIC bonding for improved network performance of servers.

● Performed bottleneck troubleshooting and root cause analysis for application and server slowdowns, sluggishness, crashes, and memory issues.

● Made resource adjustments based on monitoring output using Nagios.

● Managed clusters and hosts.

● Migrated machines between hosts.

● Deployed, configured, and maintained Linux servers both locally and remotely using ILO and iDRAC.

Presbyterian Hospital New York, NY

Linux Systems Administrator 02/2014 to 03/2017

● Managed, installed and updated patches and software packages using YUM and RPM.

● Set up local YUM repository for offline servers.

● Managed multiple RAID levels on Sun, Dell and HP servers.

● Installed and configured services such as PXE, DHCP, NFS, Apache Web Server.

● Written DOCUMENTATION on configuration, installation and deployment of servers.

● Documented root cause analysis and troubleshooting issues.

● Storage management tasks such LVM management, including extending and reducing LVM's, creating filesystems and partitions.

● Configured different raid levels.

● Preserved necessary back-up of important files using tar and crontab jobs.

● Took part in backup and secure copying data from production environment to DISASTER RECOVERY center.

● Monitored issues to ensure a timely solution.

● Worked on virtual and physical Linux hosts and involved in day to day administrative activities such as maintain user accounts, password management, providing advance file permissions to specific users, etc.

● Worked with team in process of DECOMMISSIONING servers.

● Worked on a user migration project.

● Knowledgeable on network devices such as switches, hubs and routers.

● Monitor system performance to prevent overload on the machine.

● Used tools such as IOSTAT, VMSTAT, TOP and SAR used to aid with this task.

● Managed and maintained RESOURCES of servers.

● Performed troubleshooting and SYSTEM PERFORMANCE TUNING.

● Hardened Linux systems for system security, file system permissions and user privileges.

● Basic bash scripting skill.

● Ran, maintained and set-up scheduled work using Crontab.

● Knowledgeable with PATCHING servers and troubleshooting.

● PASSWORD recovery of RHEL 6,7,8.

● Managing SSH connections and key less entry of users to different servers.

● Took part in RACK and STACK in server BUILD process.

● Created and managed filesystem by partitioning, managing INODES. EDUCATION AND TRAINING

Bachelors in Computer Science

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