SUMMARY

• 6+ years of experience with RHEL/CentOS/Ubuntu and SLES system administration in an enterprise environment.
• Extensive experience in Linux system Administration, System Builds, Server Builds, Installations, Upgrades, Patches, Tuning, version control, Migration, Troubleshooting on RHEL/CentOS 5.x,6.x,7.x
• Experience in configuring Red Hat Linux 5.x, 6.x, 7.x using kick start (with FTP, HTTP, and NFS.), and interactive installation.
• Experience working in large data center environments (7000+ Linux Servers)
• Experience in administering VMware ESX Infrastructure, vSphere Client 6.1.0
• Experience building Linux virtual infrastructure using VMware ESX.
• Experienced in implementing Organization DevOps strategy in various operating environments of Linux and windows servers along with cloud strategies of Amazon Web Services.
• Experience on AWS services like EC2, S3, RDS, ELB, EBS, VPC, Route53, Auto scaling groups, Cloud watch, Cloud Front and IAM for instantiating, configuring and managing various Amazon images for server migration from physical servers into cloud.
• Experience developing and implementing continuous deployment code, experience with CI/CD (Jenkins) pipelines and DevOps methodologies.
• Designed and developed automated deployment and scaling processes based on Docker and Ansible for all the services.
• Implemented automation using Configuration Management tools like Ansible
• Experience in Version Control Systems GIT.
• Experience in Installing, configuring Ansible on Linux clients, creating new profiles, running checks, modifying scripts, pushing changes to the clients.
• Expertise in Installation, Configuration, Integration, Tuning, Backup, Crash recovery, Upgrades, Patching, Monitoring System Performance, System and Network Security
• Experienced with the installation, configuration and volume/File system management using Logical Volume Manager (LVM).
• Proficient in Networking and configuring TCP/IP, DNS, NFS, SAMBA, LDAP, SSH, SMTP.
• Expert in Installation, configuration of Patches and Packages.
• Proficient in installation and configure file systems such as ext3, ext4, xfs.
• Experience in Installation, configuration and troubleshooting web server issues including Apache Web Server
• File system - organization, mounting, file types, permissions etc.
• Experience with backup technologies like Veritas Netbackup
• Self-motivated, Strong in troubleshooting, monitoring, training and 24/7 production support in mission critical environments, able to set effective priorities to achieve immediate and long-term goals and meet operational deadlines. Able to work independently and as team member.

TECHNICAL SKILLS

Hardware: IBM/HP/DELL

O / S: Red Hat Linux (RHEL 5/6/7), Windows 2012, Windows 2016

Automation: Ansible, Jenkins, Docker, GIT

Backup Management: Veritas Netbackup

Script Languages: Shell/Python scripts, Ansible, Maven

Web Technologies: Apache, Tomcat, Nginx

Database: MySQL

Protocols: SMTP, TCP/IP, FTP, TELNET, UDP, DNS, DHCP.

Virtualization: VMware, KVM, OVM.

Network Services: SSL, HTTP, SMB, NFS, DNS, SSH, NTP, TELNET.

Cloud Computing: Amazon Web Services(AWS), Cisco Cloud Center

PROFESSIONAL EXPERIENCE

Linux Systems Administrator

Confidential, Coppell, TX

Responsibilities:

• Installation, configuration, maintenance, Administration, and support on Redhat Linux Servers, Ubuntu and SLES.
• Automating environment build and provisioning using virtualization, containerization and orchestration tools with Docker, VMware, AWS and Ansible.
• Built both physical and virtual Linux servers RHEL 5/6/7, Ubuntu, SLES in all environments, system test, appdev, staging and production.
• Build servers (Linux/Windows) using AWS which includes importing necessary volumes, launching the EC2 instance, creating security groups, auto - scaling, load balancers, Route 53 and SNS as per the architecture.
• Managed multiple AWS services like VPC, EC2, S3, ELB, AutoScaling Groups(ASG), EBS, RDS, IAM, CloudFormation, CloudWatch, CloudFront, CloudTrail.
• Developed Ansible Playbooks and used Ansible for configuration management for application deployments & workload streamlining.
• Administration and configuration of High availability (HA) Cluster (Pacemaker).
• Upgraded RedHat Enterprise Linux 6.x to RHEL 7.x.
• Used Rapid7 to scan the RHEL 5/6/7 servers for the vulnerabilities and remediate/fix it accordingly.
• Installed, Configured and maintained Redhat Satellite Server 6.
• Configured Custom Redhat channels, created standard Kickstart Profiles, applied security patches with Redhat Satellite server 6.
• Performing quarterly/monthly patching, automated the patching process using shell scripts and Ansible.
• Tested the Linux security patches packages before deploying them into production environment.
• Installed and updated third party application RPM s.
• Troubleshoot Linux OS if the server is not back online after the reboot after applying patches, worked on booting issues.
• Automated the application installation post building the VM with Ansible and shell scripts. Installed SCOM agent, Trend Micro and Trend Deep Security Antivirus Agents, NetBackup on RedHat Linux and Windows Servers.
• Setting the static IP Address on a spun up VMware machine using Ansible playbook.
• Automated server registration to RedHat Satellite with Ansible.
• Build and Implemented Ansible Tower to manage all existing servers and automate the build/configuration of new servers.
• Developed Ansible Playbooks to perform user and group management, and for deployment of Splunk forwarders on Linux servers.
• Involved in Performance Tuning, Backup, and Crash recovery, Upgrades, Monitoring System Performance, System and Network Security of the servers.
• Tune system software for peak performance and availability.
• Performed Memory and Swap management to improve optimization and performance of the servers.
• Implemented and maintained server virtualization using VMware ESXi, KVM, OVM.
• Hardened the servers to prevent attacks, hacking and generating SSH authenticating keys to secure the environment.
• Configured local firewall and managing iptables, firewalld, managing sudo permissions.
• Regular disk management like adding and replacing hard drives in existing servers and workstations. Creating partitions according to requirements, creating new file system or growing existing one over the hard drives and managing the file system.
• Providing SAN support including zoning and LUN provisioning, troubleshooting, capacity planning and reporting.
• Performed all LVM and file system tasks like creation of Logical volume and file system, mount a file system, modifying size of a Logical Volume and file system, removing a file system.
• Monitored system logs, monitored system resources for better performance by using monitoring tools (top etc.).
• Maintained DNS, NFS, mail, web, and FTP services for the enterprise.
• Deployed Splunk forwarder agents on Linux servers and worked on Splunk configuration and log/event management.
• Worked with the application teams and other IT department personnel to coordinate system software changes and support application changes.
• Hardening Linux Server and Compiling, Building and installing Apache Server from sources with minimum modules.
• Configured and troubleshooted NFS, Apache, Sendmail and Postfix.
• Configure, maintain and troubleshooting Samba Servers in navigating to Linux directories from windows.
• Troubleshooting the network issues and response problems.
• Setup NIC bonding for servers with critical information.
• High Availability and Load Balancer Solutions such as Nginx. F5
• Worked closely with the Networks and Security Team in opening firewalls and DNS requests required for the infrastructure.
• Provide off shift on call support for system support.
• Provided 24x7 on call and remote support for Linux Production Problems and responding to user's tickets.

Environment: RHEL 5/6/7, VMware ESXi, AWS, HA Cluster(Pacemaker), RedHat Satellite, Docker, Ansible , Ansible Tower, SCOM, Splunk, NetBackup, Apache, F5, Nginx, Shell/Python Scripting

Linux/DevOps Admin

Confidential, Richardson, TX

Responsibilities:

• Installed and Configured Multiple OS distributions using VMware.
• Administration of RHEL 6/7, CentOS, Windows 2012/2016 which includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Management, Installation and monitoring of Cisco UCS and Cisco Cloud Center.
• Installed Red Hat Enterprise Linux over the network using Kickstart Installation.
• Installation of patches and packages using RPM and YUM in RedHat Linux.
• Responsible for performing tasks like Branching, Tagging, and Release Activities on Version Control Tools like GIT.
• Maintained Git workflows for version control (Source code management)
• Developed and maintained automated CI/CD pipelines for code deployment using Jenkins
• Virtualized the servers using Docker for the test environments and dev - environments needs, also configuration automation using Docker containers.
• Created a Continuous Delivery process to include support building of Docker Images and publish into a private repository- Nexus
• Deployed and Orchestrated the applications with Kubernetes.
• Designed, Installed and Implemented Ansible configuration management system.
• Used Ansible to manage Web applications, Environments configuration Files, Users, Mount points and Packages.
• Automated daily tasks using Shell/Python scripting and Ansible Playbooks
• Installed, configured and supported Windows and Linux servers, including Active Directory authentication for Linux servers via Samba and Winbind.
• Creating volume groups, logical volumes, extending logical volumes based on the requirements using Logical Volume Management (LVM).
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Installed, Configured and troubleshooted NFS, NIS, SMTP, DNS, DHCP, FTP, LDAP, and Samba, Apache servers on Linux Servers.
• Configured the systems for TCP/IP Networking with the existing LAN, Setting up SSH and SCP.
• Troubleshooting and configuration of Local and Network based printers. User, Group Administration and Advanced File Permissions.
• Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios.
• Performed troubleshooting of various bottlenecks including those found in the CPU and memory using system and network monitoring tools.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as IPtables, firewall, TCP wrappers, NMAP.
• Installed and configured Veritas NetBackup on Red Hat Enterprise Linux .
• Configured and Supported Apache Tomcat on Linux production servers
• Monitoring system resources, logs, disk usage, scheduling backups and restore using Nagios and Veritas Net backup
• Running SQL queries on Oracle and MySQL.
• Installation, configuration and management of MySQL database servers.
• Backed up MySQL databases with mysqldump, Bash scripting, and CRON jobs.
• Managed SSL certificate purchasing, renewals, and installations.
• Worked on SAN storages like Netapp
• Tuning the kernel parameters based on the application/database requirement.
• Created project report and wrote technical document for various projects.

Environment: RHEL 6/7, CentOS, Windows 2012/2016, Jenkins, GIT, Docker, Kubernetes, Ansible, Apache Tomcat, Cisco UCS, VMware ESXi, Cisco Cloud Center, Nexus, Shell/Python Scripting, NetBackup, Nagios

Linux Systems Administrator

Confidential

Responsibilities:

• Installed and configured Linux/CentOS and Oracle Linux Servers.
• Installed and configured VMware ESX server instances for virtual server setup and deployment.
• Responsible for creating VMware virtual guests running RedHat Linux, Windows.
• Installation of Redhat Linux OS/Windows OS kickstart, setting up of Firewalls (Ipatables), configuring basic rules for logging in to syslog server, MySQL
• Monitoring and Managing use of disk space, connections, Analyzing, and troubleshooting the SQL Server processes and jobs
• Administered, monitored RHEL and Windows servers (2008, 2008 r2, 2012, 2012 r2).
• Applying OS patch and upgrade in a multi - platform (RedHat/Ubuntu/Windows) on a regular scheduled basis
• Setup and maintained NFS and TCP/IP network, configured the systems for TCP/IP Networking with the existing LAN, setting up SSH and SCP features between SUN systems and other Red Hat/UNIX hosts.
• Configuration and administration of LDAP, NFS in Linux and implemented Samba for sharing of resources between Linux and Windows environments.
• Deployed RedHat Satellite Server with custom repositories to provide a stable management solution for the Linux environment.
• Install and configure DHCP, DNS, web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on Red Hat Enterprise Linux servers
• Involved in Storage management, LVM, File system management, User account management, data backups and user's logon support.
• Installation, configuration, support and security implementation on following services: DHCP, SSH, SCP.
• Configuration and administration of NFS and Samba in Linux and Solaris.
• Worked on Web servers; Tomcat & Apache Server
• Linux kernel, memory upgrades and swaps area and performed Red Hat Linux Kick start installations
• Automated system management tasks like user account creation, file system size monitoring, monitor system resources and system maintenance using Shell and Perl scripts.
• Network trouble-shooting using netstat, ifconfig and tcpdump etc.
• Configuring IP connectivity, routing, checkpoint firewall and network interfaces. Also maintaining network connectivity of servers.
• Implemented Network File System (NFS) for file sharing and network installation
• Implementation of Samba to help printing and file sharing in the mixed Environment
• Day to Day activities included handling Security issues like stale UNIX account Cleanups, 90 day password changes, setting max age and min age, creating a list of umask permission for various users and troubleshooting, Patching, Upgrades and Back-ups when required
• Monitored trouble ticket queue to attend user and system calls, attended team meetings, change control meetings to update installation progress, and for upcoming changes in environment.
• Providing software support to corporate users of Symantec Antivirus and security products

Environment: Red Hat Enterprise Linux/CentOS 5/6, Oracle Linux, VMware, LVM, MS Windows 2008 server, Symantec Antivirus, Bash