SUMMARY

• A Linux Engineer/ Admin with 6 years of experience in administration of Linux operating systems and storage infrastructure supporting a mission - critical environment on developments, testing, and production servers.
• Expertise in implementation and operational support of Linux servers and virtual environment including patching, provisioning, application deployment, storage management, troubleshooting related issues and automation with Ansible.
• Creating and troubleshooting users, groups, and permissions queries to provide a secure environment along with maintaining a productive environment.
• Analyzing and troubleshooting file systems, servers and network connectivity issues.
• Maintaining, collaborating and logging different versions of code using Github’s Version Control options.
• Pushing, pulling, and staging files/directories from the Remote repository.
• Creating, adding, and monitoring the private and public VPN’s to limit accessibility and decreasing access from unwanted people.
• Setting up and allowing an Elastic Load Balancer for public servers.
• File System Management: EXT2, EXT3, EXT4 utilities.
• Maintain EC2 instances with the halp of Cloudwatch.
• Managing and deploying LVM partitions, SAAS, SAN, NAS, and filesystems.
• Use of Shell scripting to automate daily tasks.
• Deploying VMware and hybrid solutions infrastructure in an Enterprise Environment.
• Installing Rhel5/6/7 using PXE server and kickstart files.
• The use of sar, Nagios, and Ansible to monitor and troubleshoot system behavior.
• Installing and updating software packages from a remote repository.
• Installing Rhel5/6/7 using PXE server and kickstart files.
• Managing Rhel5/6/7 packages using yum and Rpm.
• Installing and configuring Servers such as Apache (httpd), DNS (bind), NFS, FTP, Ansible, Samba, logs, and Nagios.
• Migrating from the old Apache server to the new Apache server.
• Scheduling Cron jobs, and upgrading packages.
• Supporting scheduled on-call rotation for after office hours.
• Deploying NAS servers such as Apache, FTP, NFS and SAMBA along with sharing files using Scp and Ansible.
• Experience with automation tools such as Ansible and puppet.
• Using Sticky bits and Acls to control and secure file permissions.
• Working on incidents and service requests to meet company SLA.
• Monitoring the queue for new incidents and providing a solution that is in the guidelines of our SLA policies.
• Decommissioning, provisioning, troubleshooting and patching servers.

TECHNICAL SKILLS

Operating systems: CentOS, Ubuntu, RHEL, Windows, Linux (Red Hat 5,6,7)

Network: TCP/UDP, DNS, NFS, NTPD, DHCP, IP TABLES, FTP, ROUTE 53, SAMBA

Automation Tools: Ansible, DOCKER, PUPPET

Languages: Bash

Version control: GIT/GITHUB

Virtualization and Cloud: AWS, VMWARE, ORACLE VIRTUAL BOX

Applications: FTP, SSH, LVM, TCPDUMP, PXE BOOT, KICK-START, HTTP, NAGIOS, NFS, DOCKER, EC2, RED HAT CLUSTERING, JIRA, APACHE, TFTP, PATCHING, XFS, EXT2, EXT4, EXT3, SERVICE NOW

PROFESSIONAL EXPERIENCE

Confidential

Linux Systems Administrator

Responsibilities:

• Worked on installation, configuration and maintenance of RHEL 5/6/7, and CentOS Servers.
• Hands on noledge of version control system (GIT).
• Collaborated with team to create ansible playbooks using Git Hub.
• Worked on Installation/Configuration/Administration of VMware ESXI 5.1 5.5 & 6.0.
• Deployed servers using PXE-Boot with customized kickstart files.
• Effectively deployed application installations, upgrades and security updates running on Linux.
• Deployed and managed Jenkins servers.
• Implemented quarterly patching RHEL 6,7 Linux systems via Ansible playbook.
• Successfully deployed applications across Development, Quality Assurance and Production environments.
• Working experience with docker containerization.
• Deployed containers using images from docker hub and local repositories.
• Created docker files to provide a specialized container.
• Configured NFS, NIS, DHCP, HTTPD, & FTP on Linux servers.
• Enhanced and created bash scripts and Ansible playbooks to automate processes.
• Installed and provisioned virtual machines with Linux distributions across different regions using PXE-boot and automated profiles with kickstart.
• Implemented skills to upgrade Virtual Machines, ESXI hosts and VCenter servers.
• Diagnosed and troubleshoot Linux processing problems and applied solutions.
• Worked with Ansible playbooks for virtual and physical instance provisioning, configuration management, patching and software deployment.
• Installed and configured VMware ESXI 5-6.
• Automated day-to-day tasks using bash scripting, cron jobs and Ansible playbooks.
• Installed, Configured & managed VMware High Availability and Distributed Resource Scheduler to ease system activity.
• Installed, configured, maintained and supported Red Hat Linux 5-6-7/CentOS 5-6-7 servers.
• Effectively decommissioned physical and virtual servers that were no longer in use.
• Worked with vendors support via email and phone to resolve crucial production cases.
• Provided 24 hour availability for Production issues and maintenance schedule for patching and migration.
• Proficiently managed and deployed bash/shell scripts for backups and scheduling tasks.
• Created logical volumes, extending the file systems using LVM for file ease.
• Responsible for most Package Management processes on all Servers (online/ offline).
• Monitored all system activities including CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Documented processes, best practices and troubleshooting procedures.
• Effectively ensured File System Management, Monitoring OS, and Network Activities.
• Created Users, Groups, Profiles, and implemented security policies using Ansible playbooks.
• Configured servers with Raid 0,1,5,6 levels for redundancy and fault tolerance purposes.
• Performed installations and provided various Linux Distributions such as Red Hat, CentOS and Ubuntu on virtual platforms.
• Patched servers to latest fixes and enhanced security features using Red Hat Satellite.
• Hands on experience in creating local FTP and HTTP yum repositories.
• Created and managed user/local service accounts and assisted with password resets and locked accounts.
• Experienced mounting and unmounting various filesystems.
• Extensive noledge of Linux file systems ext3, ext4, xfs.
• Productively applied integrity checks and monitored system health using command line utilities such as SAR, IOSTAT, VMSTAT, TOP, and FREE commands.
• Extensive noledge of Linux run-levels in RHEL 6 and RHEL 7.
• Built File Transfer Protocol (FTP) for transferring files to client machines over the network.
• Monitored systems health using Nagios.
• Created and mounted NFS shares on client machines for accessing data.
• Extensive noledge of implementing LVM on filesystems.Utilized SCP, FTP for file sharing over a network to client machines.
• Provisioned RHEL 5, 6, and 7 on bare metal and VM’s.

Confidential

Linux Systems Engineer

Responsibilities:

• Administering RedHat Enterprise, CentOS, AIX, Solaris systems.
• Troubleshooting production systems working with business applications.
• Creating virtual machines for installation of applications and servers using VMware.
• Monitoring clusters for high availability and resource management using VMware HA and DRS.
• Monitoring users and groups using LDAP and Active Directory.
• Managing VMware VCenter and VSphere in production. Providing support and backups of vms after business hours. Creating ESXi hypervisors with hardware raids.
• Automating configurations and installations using Ansible.
• Creating playbooks to deploy and configure multiple servers.
• Creating SSH keys for password less entries and VPN servers.
• Installing and configuring HTTP, DNS, DHCP, FTP, NFS and PXE boot servers.
• Monitoring web applications on production systems.
• Creating DNS records and managing IP addresses and hostnames using DNS and DHCP.
• Installing OS patches, system patches, and vulnerability patches using BladeLogic.
• Creating local YUM repository and packet management using RPM and YUM.
• Monitoring system and infrastructure health using Linux CLI and Nagios.
• Ticket management and solving issues using ServiceNow.
• Creating bash shell scripts to automate tasks such as monitoring machine performance and repetitive daily tasks.
• Creating iptables rules to manage firewall and harden servers.
• Communicating and collaborating with network, database, and storage administrators to perform server builds.
• Working with different teams after business hours to provide support for patches and upgrades. Supporting systems on call with monthly rotations.
• Migrated systems from on premises to AWS with Migration Hub.
• Managed EC2 instances and provided troubleshooting support with deployed instances.
• Created backups and deployed S3 buckets. Provided object availability and durability solutions.

Confidential, CT

Jr. Linux Systems Admin

Responsibilities:

• Providing support with developer’s infrastructure servers.
• Configured NIC for Configured, managed and provisioned RHEL, CentOS, and Ubuntu servers.
• Migrated physical servers to VMware and configured virtualized infrastructure using vCenter.
• Managed and provisioned virtual machines using templates.
• Installed and partitioned storage and installed file systems such as EXT3, EXT4, and XFS. Monitored servers’ performance and their health.
• Resolved basic and critical system issues in a timely manner.
• Automated daily tasks and scheduled them using cron and at utilities.
• Created documentations basic operation procedures and tasks using Confluence.
• Used LVM to manage disk space more efficiently.
• Collaborated with bonding to enhance performance and redundancy.
• Racked, stacked, and wired servers in data center. Troubleshooted issues with servers related to on premises.
• Built new systems using PXE boot and the kickstart file.
• Set up service port using ILO and IDRAG for remote access to console.
• Decommissioned servers that were on premises and provided upgrade support.
• Managed upgrades and patches using Red Hat Satellite on production systems.
• Troubleshooted production systems with Linux CLI commands.