SUMMARY

• An experienced Linux Administrator with a demonstrated history of working for 7+ years, having experience in Red Hat Enterprise Linux and CentOS 5,6,7,8 on different platforms virtual and physical.
• Experienced in DevOps tools such as Ansible, Ansible Tower, Git, Jenkins, AWS, Docker, AWX.
• Ability to work on development and Production environments to provide support of various applications and services.
• Managed and administered Linux Systems including user management, Disk management, performance & Kernel tuning, automating tasks, NIC bonding and troubleshooting.
• To meet the pace of technological dynamic got insight in cloud AWS services such as Autoscaling, Cloud Formation, Cloud Watch, EC2, ELB, IAM, AMI, S3 and VPC.
• To diversify my knowledge got experience of DevOps tools such as Docker, Kubernetes, Git, Jenkins and Ansible.
• Expert in installation of packages using Yellowdog Updater Modified and RedHat Package Manager on various servers and creating YUM repository server.
• Experienced installing, configuring and upgrading of Red Hat Linux using PXE Boot/ Kickstart and interactive installation.
• Experienced in automation of Packages and Patching, maintaining user accounts, System security maintenance using automation tool like bash scripting and Ansible playbooks.
• Experienced in setting up network environments and file sharing using NFS.
• Experienced in working with different teams such as Network Engineering, Database teams, application teams, storage team, security team and data center team to resolve the issues and provide customer Satisfaction.

TECHNICAL SKILLS

Operating Systems: Red hat 5, 6, 7, 8 & Centos 5, 6, 7 and 8

Virtualization: VMware, vSphere, Hypervisor, Esxi

Patching: YUM, RedHat Satellite

Storage: SAN, NAS, DAS, NFS

DevOps Tools: Ansible, Bash scripting, Git, Docker, Jenkins

Applications/ Servers: TCP/IP, DNS, APACHE, NFS, LVM, SSH, RAID, PXEBoot, Yum Repo

Backup & Trouble shooting: Configuration Tools:

Hardware: Languages:

Database: Nagios Core, Nagios XI, Cloud Watch, NetBackup

VCenter, ILO, IDRAC: HP ProLiant DL (360,380,420), Dell PowerEdge (R610, R710)

Bash Shell Scripting, YAML: SQL, MySQL, MariaDB, MongoDB

Amazon Web Service: EC2, EBS Volume, S3 buckets, Glaciers, IAM, AMI, RDS, Cloud Watch, Cloud Formation

PROFESSIONAL EXPERIENCE

Confidential, NYC, NY

Linux System Administrator

Responsibilities:

• Implementing RedHat Enterprise workstation provisioning process for both RHEL 6, RHEL 7 and RHEL 8 clients/workstations.
• Setting up and configuring Server using PXE with kickstart.
• Installing ESXi Hypervisor Servers, VSphere clients and VCenter Servers
• Resolved tickets for User Management, Storage Management and solved SSH related issues.
• Maintained the YUM repository server for patch management as well as securing Linux systems using local repository and installing, upgrading applications on Linux Systems.
• Experience on patches installation, packages installation, and patch upgrades on Red Hat Linux servers by using RPM YUM DNF.
• Configuring DNS, SSHFS, VSFTPD, DHCP servers.
• Proficient in transferring files across networks using protocols like SCP, SFTP and FTP
• Performing daily system monitoring, verifying the integrity and availability of all hardware, server resources, system, and key processes, and reviewing systems and application logs.
• Creating and managing user accounts, security, rights, disk space and process monitoring in Oracle and RedHat Linux.
• Deploying and configuring LVM storage technology to manage disks and file systems on local and SAN and NAS attached devices and create snapshots for a point in time backups.
• Ensured secure access to remote servers by using open SSH. Further creating keys and ensuring password less access to local and remote servers.
• Resolved tickets for User Management, Storage Management and solved SSH related issues.
• Monitoring status of scheduled jobs, monitoring system errors and prepare for corrective actions, and monitoring filesystem space.
• Experience Installing applications on AWS EC2 instances and configuring the storage on S3 buckets.
• Managed policies for S3 buckets and Built S3 buckets and used S3 buckets and Glacier for storage and backup on AWS.
• Understanding of pre - patching and post patching issues (kernel panicking, software incompatibility issues) and communicating with the vendors to resolve issues for the stability of the environment.
• Experience Working with container-based deployments using Docker, working with Docker images, Docker hub and Pulling Docker images, run containers and monitored the docker demon processes.
• Automating administrative tasks, reducing, and improving task efficiency by deploying Bash shell scripts to perform.
• Conducting Root Cause Analysis to remediate and implement future proofing measures, leading to a sharp reduction in recurrence of future incidents
• Provide system deployment, system administration, and troubleshooting for operational support of Linux based Prod and Dev servers.
• Create, manage VMs (RHEL/ CentOS) and involved in virtual server maintenance.
• Managing, installing, and upgrading software packages for servers using RedHat satellite repositories.
• Preparation and execution of server patching and upgrade using ansible tower patching projects.
• SME In incidents management, change requests and service requests where performed Root cause analysis(RCA) while solving network-related, performance, disk management and LVM management issues.
• Experience using ansible as configuration management tool. Writing ansible playbooks to install application stacks and patching.
• Using Ad-hoc commands as needed for administrative tasks.
• Experience working on AWS launching EC2 instances and configure their cloud environment.
• Manage role, policies for S3 buckets and useS3 buckets/Glacierfor storage and backup onAWS.
• Respond to all LINUX system problems 24x7 as a part of an on-call rotation and resolving issues promptly.
• Extensive knowledge of Performance Monitoring of CPU, Memory, Swap, Disk utilization, and monitor networking issues.
• Experience working with GIT for version control and repository management involving, cloning, pushing, pulling, branching of repositories and used Source code management client tools like Git lab, GitHub.

Confidential, Warren, NJ

Linux System Admin

Responsibilities:

• Installed, configured, maintained, and supported Enterprise RedHat Linux & CentOS 5, 6, 7 servers with PXE-boot and kickstart.
• Setting up NFS server for file sharing and storage.
• Creating logical volumes, extending the filesystemsincluded ext2, ext3, ext4 and XFS using LVM.
• Setting up secure password less access with SSH authentication.
• MonitoringSystemActivities like CPU, Memory, Disk and Swap space usage to avoid any performance issues.
• Good understanding of various RAID levels. Implementing the RAID (0,1,5,6,10) based on the customers priorities related to performance, and redundancy
• Performed scheduled system backups through NetBackup.
• Monitored system logs through Splunk server and collected logs in order to analyze them.
• Monitored system performance through Nagios core and configured newly provisioned servers to be monitored by Nagios server.
• Worked with Bash scripts to automate daily tasks.
• Creating and Managing user accounts through active directory.
• Involved in decommissioning process.
• Performed regular incremental backups using TAR and RSYNC commands for data recovery in theLinuxservers.
• Used Nagios as a monitoring tool to identify and resolve infrastructure problems before they affect critical processes.
• Investigated critical issues, determine impact to provide solutions and documented Root Cause Analysis (RCA) when required.
• Experience of Raid levels (0, 1, 5, 6, 10) for improving performance and redundancy.
• Reading and utilizing SYSLOG to troubleshoot system issues.
• Experience in system administration, system builds, server builds, installs, upgrades, patches, migration, troubleshooting, security, backup, performance monitoring and fine tuning on RedHat Linuxsystems.

Confidential, Houston, TX

Linux System Admin

Responsibilities:

• Provide support for internally developed tools.
• Delt with user management, group management, account creation, termination, and modification.
• Worked on creating files and directories, setting up permissions based on service request.
• Maintained server hardware to ensure perfect functionality.
• Configured and deploy new equipment and other peripheral accessories.
• Built and provisioned servers BM using bootable device.
• Utilized Nagios software to monitor systems, applications, and services.
• Exposure to Bash Shell scripting for automation using for loop and if-then-else statement.
• Maintained proper documentation of all the activities carried out during the project.
• Racking and stacking of new servers.
• Provided support in handling queries and issues related to computer systems.
• Ensured end users satisfaction by monitoring and responding quickly and effectively to requests received.