SUMMARY

• Senior Linux System Administrator with over 5 years of experience in Linux/Unix.
• I have been Administrating Red Hat Enterprise Linux (RHEL) by performing daily System Administration tasks, managing software, configuring and managing storage, connecting to the Network. Securing (RHEL) systems by implementing Vulnerability management system and following strict security policies.
• Worked with Users, Groups, and Permissions, Understanding and configuring SELinux, working with KVM Virtualization, securing Servers with iptables.
• Solid experience in automating configuration of servers, security, package deployments and monitoring the health of systems using Puppet Enterprise Edition. Experience in Networking (RHEL) configuring OpenLDAP,configuring Server for file sharing, configuring DNS and DHCP, Setting up a Mail server, and configuring Apache on (RHEL).
• Monitoring and Optimizing Performance of servers, analyzing CPU Performance, analyzing memory usage.
• Worked with Bash Shell scripting also have understanding and troubleshooting of the Boot Procedure.
• I have experience in High - Availability Clustering, and worked with PXE Boot and Kickstart.
• I have experience of management, installation, configuration, and troubleshooting of Linux servers.
• Ability to handle multiple tasks and work independently as well as in a team.
• Seeking a Systems Administrator position with an exciting, innovative and ambitious company that offers room for progression.
• With my extensive knowledge and experience as a Linux Systems administrator and strong interpersonal skills as well I am looking for a challenging and rewarding career opportunity.
• Solid 5+ years of experience as a Linux system administrator/Engineer
• Experienced for daily maintenance, configuration, architecting and managing of Linux, Red HAT, Darwin, and CentOS servers
• Extensive experience of User management by Setting up users and groups, network configuration, password, resolving permissions issues, user and group sudo access management
• Excellent experience in automating Installations of different flavors of Linux (RHEL 5/6/7, CentOS and Ubuntu 12, 14) and VMware EXSI 5.5/6.0 using PXEboot with kickstart.
• Hands on experience in writing a bash script for automating tasks and for creating backups
• Extensively worked with nmSYS monitoring system
• Experienced in working asset registry iTrac
• Hands on experience in checking all hosts in Carnival
• Experienced in racking, stacking of servers
• Expertise in file systems management
• Experienced in installing and configuring Red Hat Cluster software
• Strong experience in Package Management using YUM and RPM
• Solid problem-solving approach in resolving daily Networking and TCP/IP, UDP and application specific related issues
• Proficient in working IPMI tools and checking SDR and SEL logs
• Extensive experience in working with IBM cloud object storage manager
• Excellent experience in Maintaining secure computing environments by implementing and updating IPtables rules on host firewall and SELinux modes
• Experienced in working with SAN storage
• Experienced in designing and Configuring NFS, NIS, LDAP, SAMBA DNS, SNMP, DHCP services for setting up environment
• Hands on experience in Configuring and managing Apache webservers and VSFTPD servers and provide troubleshooting
• Experienced in using puppet for managing the infrastructure, configuration, user management, file system management, monitoring, server provisioning with manifests
• Excellent Experience in using the GitHub repository
• Proficient in regular Disk management by adding, replacing and partitioning the existing servers according to the requirement
• Excellent Knowledge on creating and managing LVs (logical volume) VGs (volume groups) using LVM (logical volume manager)
• Hands on experience in creating and cloning virtual machines using VMware Vcenter Vsphere
• Extensively worked on upgrading the Virtual Machines Vmware ESXI hosts and vcentre servers
• Extensively Utilized KVM virtualization
• Expert level skills in setting up iLO and iDrac configuration
• Expert in Provisioning and configuration of all Linux servers
• Extensively worked on different storage container
• Solid experience and understanding of RAID levels (0,1,5,6,10)
• Ability to monitor systems performance and tune for better performance using tools such iostat, top, vmstat, tuned, sar.
• Extensive Experience in configuring LAMP STACK for resolving the connectivity issues
• Extensively used tcpdump, telenet, netstat, traceroute, and many other tools for troubleshooting networking, related issues
• Hands on Experience in working with different file system like ext3, ext4, xfs, and NFS
• Strong ability in creating partition using fdisk and fixing file system
• Experienced in working with Espresso, Central Station, Radar ticketing systems
• Extensive experience in checking file system on regular basis and fix it when needed
• Proficient in monitoring system health using Nagios Network Analyzer for analysis and security threats
• Extensively Provided direct user support for level 2 and level 3 issues via ticket system
• Excellent approach in researching and recommending innovative, and where possible, automating approaches for system administration tasks
• Having strong ability in establishing good working relationship and to follow the paths towards successful completion of the project
• Strong problem-solving approach, monitoring and 24/7 production support in mission critical environments
• Capability to adapt new environment and learn quickly
• Excellent Verbal and written communication skills

TECHNICAL SKILLS

Platforms: Red Hat Enterprise Linux 5/6/7, CentOS 5/6/7, Ubuntu 12/14, x86/x64 and Windows 2000/2003/2008/10 platforms, NFS, NIS, Automount, DNS, DHCP, Veritas Netbackup, TCP/IP, and UDP.

Hardware: HP ProLiant DL580 G6, DL380 G6, DL980 G7, Dell PowerEdge R330, R730, R630, and Cisco switches.

Network/Internet: VPN and Remote Desktop, VNC Server Access, Telnet, SSH, FTP DNS, DHCP Firewall, TCP/IP, and UDP Routers, Raid Manager using RAID levels, and LVM, network adapters and switches, Nginx.

Networking File System: ext2, ext3, ext4, XFS, NIS, DNS, NFS, RPM, YUM, LDAP, Splunk and Auto FS, LAN, WAN, Iptables, Firewalls, SElinux Httpd and apache Server.

Softwareand Tools: Nagios, Cloud Computing, PXE Boot and Kickstart, Sendmail, Samba, Storage such as NAS, DAS, and ISCSI, LVM, VPN, SNMP, Ganglia, solarwinds, AWS, Puppet, Ansible, Docker, Jenkins, cron jobs, iLo and Idrac, httpd and apache, disk management, Wireshark and tcpdump, and provisioning.

Virtualization: VMware, VSphere, hypervisors, ESXI 5.5/6.0, KVM, AWS

Other Techs: DevOps, Open-stack, Big Data, LAN/WAN, VPN, MySQL Database, channel bonding, kernel tuning, package management, Bash shell scripting

PROFESSIONAL EXPERIENCE

Confidential, Sunnyvale, CA

System Engineer/Onsite Lead

Responsibilities:

• Extensively worked on Linux, Darwin, Ubuntu and Esxi hosts
• Responsible for managing 5000 hosts
• Managing five Production, one Pre-Production and four QA environments
• Responsible for closely monitoring of all hosts on Carnival
• Reboot the missing/down hosts
• Automating approaches for system administration tasks by doing research and recommended and innovative approaches.
• Working on Puppet Enterprise configuration management automation tools installation and upgrading it.
• Installing the OS using PXE boot and also troubleshoot all installation related issues
• Ensuring all the latest packages are installed on all production servers
• Server monitoring & support for various application teams based on custom property basedrequirements using Nagios, Nmsys and Epic
• Working with change management process
• Exposure to Ansible
• Using tcpdump tool and wireshark to assist with network troubleshooting.
• Following up with DC team for all hardware failures
• Closely working with Networking team for all network related issues
• Updating, searching and creating asset related information of all hosts in asset registry iTrac
• Working on nmSys monitoring system
• Installed, configured, and maintained the KVM switches, VMware, routers, port servers, and upgrading the Linux OS.
• Using tools such as iotop, vmastat, and sar to do performance monitoring.
• Thoroughly checking and updating the nmSys scripts and the threshold values according to the requirements
• Acknowledged all spare hosts in nmSys
• Extensive experience of working on Epic
• Hands on experience of working on VMware esxi hosts
• Experience in troubleshooting of virtual hosts
• Coordinating and helping the team in new Buildout projects
• Working on decommissioning the Virtual machines
• Cloning a VM in ESXI Hypervisors
• Setting up Virtual hosts power policy
• Experience in working on Verdad Configuration management tool
• Creating, updating and editing Verdad tags for all hosts
• Troubleshooting Puppet related issues
• Performing troubleshooting steps for Filesystem, Network issues
• Responsible for BIOS, Firmware upgradation
• Resolving CPU, Disk, Load utilization issues
• Creating and updating PVs, VGs, and LVM
• Upgrading packages on Linux by using RPM and YUM and patching it to maintain the productive environment
• Setting up Boot order and responsible for resolving Server fan and Power supply unit issues
• Extensively working on IPMI tool
• Checking IPMI SDR and SEL logs for server hardware failure and DIMM issues
• Responsible for setting up backup policies and ensured that all network systems are being backed up
• Resolving Kernel panic issue
• Experience in working on Espresso, Central station and Radar ticketing system
• Successfully written queries/script for sorting out Auto, User and Aging tickets in Espresso and Central Station
• Hands on experience in writing Bash/Shell scripting for automating daily task
• Extensively working on IBM cloud object storage manager
• Closely monitoring all storage pools in storage manager
• Responsible for replacing pulled, failed, Diagnostic drives
• Performing resume operations on all quarantined drives
• Before decommissioning assets ensured data destructions.
• Pro-actively working on automation and elimination of maximum manual tasks
• Creating a SRE documents and also working on creating and updating run book
• Responsible for updating weekly status reports
• Holding regular on-site and off-shore meetings
• Helping the team for complete migration from Espresso to Central Station
• Working with Onsite/Offshore team along with other teams to make sure the availability of the apps to the customers

Confidential, Jersey City, NJ

Linux Systems Administrator

Responsibilities:

• Responsible for complete user management, creating, renewing and deactivating accounts
• Resolving issues with OS installs. Deploying kick start file to accommodate automated installs
• Building and provisioning of RHEL servers using automated approach with PXE boot and custom kick start files.
• Responsible for installing, configuring of CISCO UCS servers
• Installing and Configuring Red Hat Cluster software
• Securing Linux system by updating firewalls and enable only required services
• Working with LVM, extending file system and attaching the storage to VMs
• Setting up NIS domain for central authentication
• Upgrading packages by working on RPM and YUM and do patching wherever it is required
• Working with Amazon Web services for cloud computing
• Setting up NFS and Autofs for mounting the resources
• Creating and extending files system such as etx3, ext4, XFS
• Monitoring system performance by using top, iostat
• Installed puppet master to keep in sync configurations on running agents
• Responsible for troubleshooting of network related issues
• Configuring LAMP stack and resolved connectivity issues
• Building virtual servers using ESXI 5.5
• Installing and configuring Vcentre and Vmotion
• Migrating hosts between ESXi servers
• Performing Physical bare metal to VM conversions
• Creating and cloning VMs
• Configuring and maintaining SAMBA servers for providing access to printers and Windows platform
• Resolving DNS related issues (traceroute, netstat, nslookup, dig, sshd, nfsd, mountd, lockd)
• Decommissioning servers following corporate procedures, ensuring data destruction
• Using puppet for managing the infrastructure, configuration, user management, file system management, monitoring, server provisioning with manifests
• Performing system installation using PXE Boot with Kick start and raking, stacking, and cabling systems in the data center
• Experience in working with JIRA ticketing system
• Experience in Bash scripting for automation of tasks
• Keeping track of system inventory and deleting data from servers
• Responsible for Package management by installing upgrading the required packages
• Monitoring the health of system and provide support when system becomes sluggish
• Responsible for Disk management
• Working with Vendors to replace server parts and ordering new hardware
• Responsible for maintaining log files
• Configuring LDAP
• Responsible for system security using vulnerability management
• Troubleshooting and maintaining of TCP/IP, HTTP/s and DNS services
• Responsible for configuring and installation of RAID level
• Ability to manage schedule the automated jobs using cron jobs
• Working with system support team to define, architect and maintain highly available production systems
• 24x7 on call technical support experience

Confidential, Warren, NJ

Linux Analyst

Responsibilities:

• Performed user accounts management.
• Performed Desktops and servers’ upgrades
• Administered Redhat Linux, and some Windows Servers
• Server deployment using PXE boot with kick start files
• Executed day to day business activities such as configuration management, user management and package management
• Configuring and installing the apache web sphere
• Keep tracking of system inventory, commissioning and decommissioning
• Setting up home directories on servers and adding users to appropriate groups
• Keep monitoring the health systems and escalated level 2 and level 3 issues to seniors
• Backed up servers and desktops using Netbackup anddocumented Linux scripts for future reference
• Administer firewalls using iptables/ipchains (Linux)and IPFilter
• Perform vulnerability assessment of business systems routinely and provide incident reports / handling as well as respond to attacks on the systems
• Managed physical storage devices and created Logical volumes as well
• Experience with channel bonding utilizing multiple interfaces for increased redundancy
• Server hardening, checking I/O and Memory performance
• Ticket assessment/prioritization on daily basis on RT platform