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Linux Systems Administrator Resume

Jersey City, NJ

SUMMARY

  • Over 6 years of experience in Linux System Administration. Proficient in maintenance of servers, user management, package management, troubleshooting, networking, storage and security
  • Worked in various automation efforts of high business value using Ansible and bash scripting
  • Exposure to AWS services such as EC2, ELB, IAM, S3, and VPC
  • Provide dedicated 24/7 support to RHEL/CentOS infrastructure across multiple data centers
  • Experience with DevOPS tools such as git, Bash/Shell Scripting, Ansible and Jenkins.
  • Expertise in Network configuration on Linux servers. Troubleshoot N/W related issues using tools like tcp dump, ethtool and netstat
  • Worked in containerization technologies like Docker and Kubernetes
  • Support Linux day - to-day operations and provided On-call Support for troubleshooting Linux OS and performance issues
  • Worked in environments that rely heavily on virtualization using VMware, ESXi, Vmotion, Vsphere, Vcenter
  • Hands on experience with server migration in numerous upgrade projects, both P2V and V2V
  • Worked with extending, provisioning and troubleshooting LVMs during CRQs
  • Good team player whose worked with numerous teams in triages and MOCs
  • Excellent time management, multitasking, able to meet deadlines and handle priorities
  • Regularly document and update processes, SOP, and Onboarding documents for my teams

TECHNICAL SKILLS

Operating Systems: RHEL 6/7, CentOS 5/6/7, Windows 8/10

DevOps: Ansible, Bash Scripting, git (GitHub), EC2, ELB, IAM, S3, VPC, Jenkins, Dockers, Python 3.7

Monitoring Tools: AppDynamics, Nagios Core, Moogsoft, Splunk, SolarWinds

Ticketing Systems: Jira, ServiceNow, BMC Remedy

Server Utilities: TCP/IP, UDP, DNS, DHCP, Apache, LDAP, Active Directory, VLAN, NIC bonding,LAN, ILO, IDRAC, Nslookup, Traceroute, TCPDump, Iptables, Netstat, SAN, NAS, DAS, iSCSI, LVM, RAID, EXT, Ext2, Ext3, Ext4, XFS, mySQL, NFS, PXE-Boot, Kickstart, Telnet and SSH, CronTab, Tomcat, Windows Powershell

Hardware and Virtualization: HP ProLiant Gen (6,7,8), Dell PowerEdge server, Cisco Switches, VMware ESXi 5.x and 6.x, Vmotion, V-converter, vSphere, vCenter Cluster, Migration, DRS, Snapshot, Clone

PROFESSIONAL EXPERIENCE

Confidential, Jersey City, NJ

Linux Systems Administrator

Responsibilities:

  • Monitor health of infrastructure servers and mission critical machines using AppDynamics and SolarWinds
  • Perform weekly requests for change (RFC) to sustain and upgrade existing infrastructure
  • Provision, configure, deploy and administrate virtual machines and hypervisors
  • Utilize orchestration tools like Ansible and source control repositories like GitLab
  • Perform disaster recovery exercises biannually to ensure highly resilient environment
  • Suppress and handle system generated alerts in Moogsoft
  • Document SOP changes and updates using Confluence
  • Resolve various system alerts, failures, bugs and outages as they arise within the organization
  • Maintain Jira board and work on tickets that get assigned to my queue
  • Decommission servers by raising a request, removing application data, formatting the hard drive, and following other steps detailed in company SOP
  • Provided support in a major Disaster Recovery effort after inhouse applications went down
  • Upgraded systems during routine patches
  • Utilize Ansible modules/arguments in playbooks to automated system patching, app deployment, configuration
  • Support 24/7 application support to the business and tackle user incidents
  • Perform end-to-end troubleshooting during incidents
  • Create standard LVM partitions and extend volume groups and filesystems.
  • Execute regular system backups during off hours and during server migrations
  • Troubleshoot Production issues within the SLA and provide root cause documentation
  • Perform post deployment validations
  • Created and managed virtual machines on vSphere client

Confidential, Middletown, NJ

Linux Systems Administrator

Responsibilities:

  • Provision, configure, deploy and administrate RHEL 6 and 7 servers
  • Run Jenkins Builds to validate development teams’ code
  • Support migration efforts from RHEL 6 to 7 using Ansible Playbooks/bash scripts available
  • Use git to interact with repositories that house yaml files. Clone, pull, and push to repositories regularly
  • Set up git config files on multiple servers for my own user
  • Linked SSH keys to user accounts on GitHub
  • Configured and manage application servers such as NFS, DNS, SSH, DHCP, FTP, and TFTP
  • Worked on core AWS services like EC2 Instances, S3, IAM and VPC
  • Spin up new virtual machine infrastructure using VMware and setting up new hosts on ESXi 6.5
  • Worked on Containerization technology like Docker
  • Perform volume management during production CRQ activities
  • Save backup snapshots of machines on VMware in case of virtual machine corruption
  • Access the console (ILO/IDRAC) for HP and Dell servers to troubleshoot system failure
  • Respond to automated Splunk storage usage alerts and clean up the affected filesystems
  • Checked performance of servers using conventional tools such as SAR, IOSTAT, VMSTAT and MPSTAT
  • Created and extended EXT 2,3,4 and XFS filesystems
  • Configured different hardware RAID levels (0, 1, 5, 6)
  • Set up NFS servers and troubleshoot NFS related issues
  • Worked in supporting and implementing security on Linux using SELinux and Iptables/Firewall
  • Solved network issues using tools such as Tcpdump and Nmap
  • Worked directly with Vendor to decommission servers and networking equipment in line with company procedure

Confidential, Lockport, NY

Junior Linux Systems Administrator

Responsibilities:

  • Installed, configured and updated RedHat and CentOS servers
  • Used Logical Volume Manager for creation of Logical Volume and Volume groups (pvcreate, vgcreate, lvcreate)
  • Increased & decrease file system storage within LVM (vgextend, lvextend)
  • Monitored system activities like CPU, Memory, Disk and Swap space usage
  • Upgraded packages and patched systems to maintain a secure production environment
  • Resolved issues ranging from desktop not booting up to server being sluggish
  • Performed RHEL administration including installations, maintenance and monitoring to meet requirements in production, staging and test environments
  • Built ESXI bare metal servers, adding them to VCenter and moving machines with VMotion
  • Worked with different vendors to order systems parts
  • Configured NTP client on servers to synchronize time zone with the NTP server
  • Job scheduling and automating process using CRON & Confidential
  • Created basic bash scripts to perform tasks on the go
  • Provided expertise in performance troubleshooting with tools TOP, VMSTAT, IOSTAT
  • Deployed and configured Yum local Repository Server for package management
  • Configured NFS server and mount exported NFS resources Confidential the client side
  • Manipulated Kernel Modules and Kernel Parameters
  • Created and managed virtual machines on vSphere client
  • Performed NIC bonding on RedHat systems for load balancing

Confidential, Santa Clara, CA

Linux Systems Analyst

Responsibilities:

  • Provided technical assistance and support in handling queries and issues related to computer systems, software & hardware
  • Configured network adapters for IP addresses and resolving routing related issues
  • Added, and Removing User, Primary Groups, Secondary Groups and assigned file and directories permissions
  • Worked on configurations, utilities and software default settings for local workstations
  • Created and verified backups of data using tar balls and md5sum
  • Upgraded systems and processes as required for enhanced functionality and security issue resolution
  • Used VI editor to edit variety of configuration files
  • Monitored and controlling system processes using top, renice, kill etc
  • Troubleshoot network hardware and software applications, OS upgrades and security systems to resolve operational issues and restore services
  • Assisted in Apache web server administration and configuration
  • Contributed to simple Hardware maintenance and repair
  • Used industry standard ticket management systems to provide support on daily basis including login issues, and resetting passwords

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