SUMMARY

• Over 7 years of work experience in Linux / UNIX /AIX System Administration under environment of Red hat Enterprise Linux, SUSE Linux, Sun Solaris, and Windows.
• Experience in installing, configuring, managing, performance tuning and developing UNIX Systems
• Experience in installation and configuration of Intrusion detection Systems such as OSSEC and SNORT.
• Experience in working with Shared Ethernet Adapter, Link Aggregation and NPIV concepts associated and network interface bonding.
• Hands on experience in installation of patches, packages and application software on Red hat, CentOS and Debian Systems.
• Experience in System Administration, System Builds, Server builds, Installs, Upgrades, Patches, Migration, Trouble shooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine - tuning on UNIX (SUN Solaris, Red Hat Linux) Systems.
• Experienced in Backup of Cluster nodes, Switching Cluster resources and Applications.
• Extensive experience in Creating, Mounting and Unmounting new File Systems.
• Experience in Security Hardening in UNIX, Linux and Windows Servers.
• Experience in using various network protocols like HTTP, UDP, POP, FTP, TCP/IP, and SMTP.
• Experienced in monitoring system performance and check the status of the system using utilities such as MONIT, NMON, VMSTAT, IOSTAT, etc.
• Proficient in shell scripting (Ksh/Csh/bash/Sed/Awk), PERL, JavaScript for Oracle and Java Applications and XML.
• Experience in Setting up and configuring Install Server, Configuration Server and Boot Server for Kickstart process and performed Kickstart to install OS on Several workstations.
• Experience in installation and configuration of WebLogic, WebSphere, Apache Tomcat and JBoss.
• Experience in configuring SSH, NIS, NFS, LDAP, Sendmail, Postfix and VSFTPD.
• Strong Knowledge in implementation of enterprise storage solutions SAN (created VGs and LVs on san disks), NAS (mounted and shared NAS devices for mlnti servers), logical volume management (LVM).
• Adept at monitoring and managing file system usage, hardware and system process failures.
• Worked 24x7 and on-call in production support and troubleshooting on various Server operating systems.
• Highly motivated Team Player with Excellent Communicationskills and Problem Solving abilities. Can work independently or as part of a team.

TECHNICAL SKILLS

Languages: JavaScript, HTML, Java, C, C++, Korn Shell programming.

Operating Systems: CentOS, Amazon Linux, Oracle Linux, Linux (Redhat), HP-UX, Windows.

Hardware: Dell Power Edge Servers, HP Blade Servers, EMC San Servers.

Web/App Servers: Apache Http Server, Web Sphere, WebLogic, JBoss, NGINX, Lighttpd, Apache Tomcat, IIS 6.0/7.0.

Networking: TCP/IP, DNS, DHCP, Cisco Routers/Switches.

Databases: Oracle, DB2, MS SQL Server.

PROFESSIONAL EXPERIENCE

Confidential - Buffalo, NY

Sr. Linux Administrator

Responsibilities:

• Installation, Configuration and Upgrade of, Red hat Linux 6/7 operating systems.
• Installing, configuring and maintaining the ESX / VCenter.
• Installed and Configure ESX version 4.1 and 5.1 and adding it to the VCenter.
• Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.
• Updating YUM Repository and Red hat Package Manager (RPM).
• Performed setting up Configuration Server and Boot Server for Jumpstart process and using tape-Recovery for file system recovery.
• Installation, administration, configuration of RHEL 6/7 including package management, patch management, regular system administration tasks.
• Installed RedHat Linux on bare metal servers and virtual machines using kick start and hardening the servers.
• Design AWS Cloud Formation templates to create custom sized VPC, subnets, NAT to ensure successful deployment of Web applications and database templates.
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client and Vphere 4.0.
• Perform daily maintenance routines on Linux servers, monitoring system access, managing file space and tuning the system for optimum performance.
• Perform troubleshooting, performance tuning and capacity planning, and troubleshooting of issues with minimal down time or no outage during working hours and have backup plans for critical Production Servers.
• Installation, Configuration and Administration of Web Logic, WebSphere and Apache Servers in Linux and Solaris Servers.
• Maintaining Remedy environments used for the ticketing system.
• Scheduling of automatic repetitive Jobs, bash and Shell Scripts with Crontab.
• Automate repetitive tasks, deploy critical applications and manage change on several servers using Puppet
• Restoring the server from the mksysb image and bringing up the server.
• Configuration and administration of Fiber Adapter’s and handling SAN disks.
• Performed mass migration of data form old EMC Storage subsystems to new Subsystems.

Environment: Linux 6/7, VMware, Oracle DB2, Kick Start, ESX / Virtual Center, EMC, Shell Scripts, Puppet, AWS Cloud Formation, Crontab. Web Logic, WebSphere and Apache.

Confidential - Dallas, TX

Linux Administrator

Responsibilities:

• Configuring, Installation and administration of RHEL 6.0 and SUSE 10.x.
• Configured kick start server and updating/applying patches to the servers using Red hat Satellite server.
• Remote system administration using tools like SSH, Telnet, and Rlogin.
• Planning and implementing system upgrades including hardware, operating system and periodical patch upgrades.
• Worked with configuration management tools like CFengine / Cobbler to configure LINUX Systems.
• Deployed and maintained fully automated production environment of several hundred servers using CFengine3 and development / research branch using Puppet.
• Managing cloud infrastructure using integrated tools for efficiency, scalability such as RightScale, Puppet and IBM SmartCloud.
• Installation, configuration and administration of VMware and Automation of jobs through crontab and autosys.
• Applied appropriate support packages/patches to maintain system integrity.
• Performed capacity analysis, monitored and controlled disk space usage on systems.
• Monitored system activities and fine-tuned system parameters and configurations to optimize performance and ensure security of systems.
• Custom build of RHEL /CentOS and Windows servers which includes adding users, SAN, network configuration, installing application related packages, managing services.
• Responsible for maintenance of development tools and utilities and to maintain shell, Perl automation Scripts.
• Design roles and groups for users and resources using AWS Identity Access Management (IAM).
• Working on Volume management, Disk Management, software RAID solutions using VERITAS Volume manager and Solaris Volume Manager.
• File system Tuning and growing using VERITAS File System (VxFS), coordinated with SAN Team for storage allocation and Disk Dynamic Multi path.
• Fine tuning of Servers and configuring networks for optimum performance.
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents, DHCP and Proxy.
• Installation, maintenance and administration of Oracle and DB2 Server on Sun Servers.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.

Environment: RHEL 6.0, SUSE 10.x, HP-UX, Windows Server, Oracle, DB2 Server, VMware, Sun Enterprise, Apache Web Server, Puppet, Oracle, Perl, Dell POWEREDGE, AWS Identity Access Management.

Confidential - Hagerstown, MD

AIX Administrator

Responsibilities:

• Setup of full networking services and protocols on AIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, and print servers to insure optimal networking, application, and printing functionality.
• AIX 5x and 6x installation, upgrading, migration and troubleshooting.
• Upgrading firmware of managed machines, devices and HMC.
• Lead datacenter migration in large midrange environment.
• Coordinated application team to Upgrade AIX 5.3 to 6.1.
• Creating and configuring standard LPAR assigned physical I/O.
• Installation and configuration of NIM master server and clients.
• Creating lppsource and SPOT for client and Installed OS on NIM clients using NIM Server.
• Configuration management including the building of LPARs using HMC, LVM and configuring the hardware devices that support them.
• Participated on SAN data migration project from switch attach to SVC attach storage for better management.
• Worked with Application and database administrator with permission issue. Created, extended file systems as per their needs and project requirement.
• Created and maintained shell scripts with project demand to automate repeated task.
• Installed application connectivity software to enable IBM print services.
• Configured and administered firewall rules, including the use of SNORT, NMAP to effectively monitor system files, port security, and network traffic activity coming through the firewall.
• Applying software maintenance, program fixes and keeping the system software releases current.
• Working closely with the Operations, Applications and Infrastructure Teams to maintain a stable environment and developed project plans and updating project statuses.

Environment: AIX (5.3, 6.1,), Shell Scripting, NIM, NFS, Samba, Web Sphere, DNS, Apache, LDAP, Dell.

Confidential - Austin, TX

Linux/AIX Administrator

Responsibilities:

• Written scripts to check system connectivity, database connectivity, file system usage, and log files.
• Associated with DBAs for installation of Oracle database (RAC) on Linux servers and for tuning, backup and restore.
• Deployed Puppet, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure.
• Installation and configuration ofRed Hat Enterprise Linux, CentOS, SUSE Linux and Solaris on both standalone and virtual environment.
• Installed Linux and created user logins, administering the system performance and monitoring user activities.
• Responsible for installation, troubleshooting and maintenance of AIX servers.
• Setting up cron schedules for backups and monitoring processes.
• Planned, scheduled and Implemented OS patches on Linux boxes as a part of proactive maintenance and Secure Shell (SSH) implementation.
• Writing various LINUX Bash shell and Perl scripts to provide vital statistics about the availability and responsiveness of the network.
• Updating YUM Repository and Red hat Package Manager (RPM).
• Responsible for system installation, configuration, upgrades and interaction with development team to troubleshooting system errors and failures.
• Routine server OS installs, old server OS upgrades using Linux Kick start.
• Managed Information security Compliance activities, Linux server security administration and Responsible for Production Servers Deployments.
• Maintaining incremental, weekly and monthly backups.

Environment: AIX (6.1, 7.1), Red hat Enterprise Linux 45.5, 6.5, Shell Scripting, Puppet, Bash shell, Perl scripts NFS, Samba, Web Sphere, DNS, Apache, LDAP, VMware, Dell.

Confidential

Jr. Linux Administrator

Responsibilities:

• Worked as Administration and maintenance of Red Hat Linux servers for maintaining packages (system/application) on server.
• Compiled kernel, Device drivers, performance tuning for OS and application, customization as per requirements, security patching.
• Configured different hardware and software components as per requirement to support UNIX initiatives.
• Indented and executed scripts and other UNIX utilities; create, tune, and optimize stored procedures and DTS packages.
• Installation of packages, patch management, volume management on Red hat Linux Servers.
• Router / Switch /Access point programming, administration, support and configuration changes as needed to ensure proper network performance on Cisco frame relay network.
• Follow documented procedures and develop new documented procedures for new technology installed in the data.
• Worked with File System includes UNIX file System, and Network file system.
• Planning, scheduling and implementing OS patches on both Solaris and Linux boxes as a part of proactive maintenance.

Environment: Red hat Enterprise Linux, Sun Solaris, Cisco, Oracle, Apache, Tomcat.