SUMMARY:

• 8+ Years of experience in Linux System Administration, Production Support of various applications on Red Hat Enterprise Linux, Red Hat Satellite Technology, Ubuntu, AIX, CentOS, Fedora, SUSE, Windows environments, and VMware. Participated, documented, managed ITIL controls and supported Linux environment.
• Hands - on experience with VMware, installation, configuration of ESX 5.0 and ESXI 5.1.
• Experienced in administering VMware Infrastructure Client 3.5 and vSphere 5.0, Xen, KVM.
• Expertise in scripting for automation, and monitoring using Shell, PHP, Python & Perl scripts.
• Seasoned Application Database Administrator with heavy Performance/Tuning capabilities.
• Experienced in installing firmware upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
• Good understanding of OSI Model and TCP/IP protocol suite (IP, ARP, TCP, UDP, SMTP, FTP, and TFTP).
• Experience in Kubernetes and Docker for deploying and scaling the work loads and also integration in Networking, Storage and Security.
• Configuration and maintenance of common Linux applications such as Apache, MySQL, NFS, DHCP, BIND, SSH,GIT and SNMP
• Experience in Developing KORN, BASH, JAVA, PERL, Python shell scripts to automate corn jobs and system maintenance. Scheduled corn jobs for job automation.
• Having Experience on a wide array of projects written in object-oriented Perl. Expert knowledge of Perl/mod-perl.
• Experience as Splunk Developer performed activities including requirement analysis, design, and implementations of various client server based applications using Splunk 5.x./ 6.x.
• Experience on Splunk Enterprise Deployments and enabled continuous integration on as part of configuration (props.conf, Transforms.conf, Output.confg) management.
• Experience in System Security Services Daemon (SSSD) in security ans password management.
• Installed and configured Windows Servers (2003 and 2008) and Handled diagnostics, troubleshooting, networking issues and also Performed technical writing and provided tier 1 customer support.
• Good experience on Mongo DB scaling across data centers and/or in-depth understanding of MongoDB, including replica sets.
• Experience on OpenSSL networking and Active Directories.
• Responsible for working with the State to review and modify process flows to increase productivity and effectively utilize FACETS features not provided by the legacy systems.
• Experience in Utilize configuration management tools (Chef/Puppet, PowerShell DST, etc.)
• Installed and configured an automated tool Puppet that included the installation and configuration of the Puppet master, agent nodes and an admin control workstation.
• Experience in System Administration, System Builds, Upgrades, Patches, migration, Trouble Shooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on UNIX (SUN Solaris, Red Hat Linux) Systems.
• Experience in design, planning, deployment, and integration of equipment and technology in Data center environment.
• Used PHP and MySQL, Oracle, ASP and Cold Fusion. Learned Ruby on Rails, business rules, SEO and other advanced tools.
• Experience in backup/restore of PostgreSQL databases. Design & manage PostgreSQL database schemas.
• Upgraded Python 2.3 to Python 2.5 on a RHEL 4 server, this required recompiling mod python to use Python 2.5. This upgrade was necessary because in lined models with UTF-8 characters were causing unexpected errors. Submitted a ticket to the Django project documenting this incompatibility with Python 2.3.
• Solid understanding of RPM & YUM, building, maintaining, and installing packages.
• Creating and maintaining Users, Profiles, Rights, and Disk space, LVMs, RAID, Netbackup and Process Monitoring on Linux
• Expertise in seamless integration of heterogeneous Unix/Linux environments (SUSE, Sun Solaris … IBM-AIX, operating systems
• Experience in Incident & defect Analysis, Penetration testing, vulnerabilities analysis, Fail Over analysis, Risk management.
• Good knowledge of VERITAS products such as Volume Manager( VxVM) & VCS/LVM/RAID
• Good knowledge on storage bases like CIFS,NFS and ISCSI to connect to the shared storages.
• Experience in implementing cloud-based solutions for compute and storage preferred
• Extensive experience in DNS,HTTP,SSL,REST, NFS, Send Mail, LDAP.
• Experience in running web scale services on Amazon Web Services (AWS)
• Ability in development and execution of XML, Shell Scripts and Perl Scripts.
• Good exposure to Operating Systems, Data Structures, Software Engineering, RDBMS and Project Management.
• Good knowledge of UNIX Shell Scripting and solid understanding of networking and security protocols

PROFESSIONAL EXPERIENCE:

Confidential, Northbrook, IL

Sr. Linux Administrator

Responsibilities:

• Performance and Memory management - verifying high CPU/memory utilization using top, vmstat, iostat, lsof, free and sar utilities, working alongside other service lines (Middleware, Oracle, SAP) in aligning priority and niceness to their processes as requested, performance tuning - increasing CPU/memory, validating tcpdump reports.
• Used configuration management tools such as Puppet and satellite.
• Worked on customer SLAs to meet the required expectations on Linux servers.
• Managing Red Hat Cluster, HPC environment etc.
• Experience in the installation, configuration and maintenance of multiple Red Hat Satellite servers along with custom repositories.
• Responsible for deploying and managing Red Hat Network Satellite server and also Oracle 9iR2 database.
• Compiling packages through Ubuntu using GCC feautures like PIE and buffer overflow protection to secure the Software.
• Performed installation of Splunk components like universal Forwarders, HF and Splunk Enterprice instances and also involved in Splunk migrations.
• Performed Splunk administration tasks such as installing, configuring, monitoring and tuning
• Setup and maintained automated environment using Chef Recipes within Azure environment. Good understanding on Knife, Chef Bootstrap process etc.
• Provisioning and Monitoring an Azure VMCluster, Developed and deployed back-end services to Azure clouds to support mobile apps. Day to day system administrators' activities which includes performance monitoring & tuning, disk space issues, send mail issues, Tools related issues, FTP, telnet & application oriented issues.
• Handling of key generations and fixing issues using the OpenSSL.
• Involved in disaster recovery testing every quarter.
• Consult, make recommendations, and design and provide solutions related to the migration to MongoDB.
• Used SSSD for identity and authentication for LDAP domains, and also used LDAP with Kerberos to manage the credentials.
• Upgrade AIX LPARS from AIX 7.1.3 to AIX 7.1.6.
• Worked on AIX/LINUX user's creation, file/dir. level permissions, Sudo permissions etc.
• Installalled Docker and used it to create, deploy, and run applications by using containers.
• Designing and planning the integration of equipment in Data center.
• Configure and monitor numerous MongoDB instance shards and replica sets.
• Experience in using various Network Protocols like HTTP, UDP, FTP, and TCP/IP.
• Created Bash/Korn shell scripts to monitor system resources and system maintenance.
• Wrote Perl and Python scripts to generate statistics and monitor processes.
• Building & configuring Red Hat Linux systems over the network, implementing automated tasks through crontab, resolving tickets according to the priority basis.
• Monitoring Hadoop Servers services like HDFS, Job tracker, Impala, HIVE through Nagios Monitoring tool.
• Used NOVA file system for high performance, And Perform test plan, test cases and checklists. Implement, prepare, execute and verify the execution of the tests.
• Secured the systems with Disk Encryption using the Ubuntu Security.
• Used HP Quality center as a bug tracking tool.
• Work with DBAs on installation of DB, restoration and performance tuning and coordinating with Database team in order to provide the necessary requirement.
• Updating Systems, Servers and client software's.
• Worked with DBAs on installation of Oracle database, RDBMS database, restoration and log generation. Perform security patching of Linux servers
• Supported 24/7 high availability production servers with On-call support on rotation basis.
• Participation in change control activities, Involved in Memory sizing of different applications.
• Good working knowledge on code commit and code deploy.
• Used chef as automation tool for the servers that are created using AWS.

Environment: Centos 5.7/6, Red Hat Linux 5/6/7, RedHat Satellite server, Ubuntu 12.04/14.04, Fedora 20/22/23, SAN, NFS, VM Ware, DELL PowerEdge 2850, 2950, Tivoli Storage Management, Win 2008/2012, Mongo DB, SUSE Manager, Dell P series 630, 650, AZURE, Amazon Web Services (AWS), HP Quality center, Oracle 10g/11g, Oracle Enterprise Linux.

Confidential, Dallas, TX

Sr. Linux/Unix Systems Admin

Responsibilities:

• Installation and Administration of Oracle Enterprise Linux 5,6 using Kick start including performance monitoring, scaling and capacity planning and hardware maintenance of Sun SPARC servers.
• AIX 5x/6x/7x installation, upgradation, migration and troubleshooting.
• Experience in installing &administering of VMware ESXi hypervisors, creating Virtual machines as requirement on hypervisors & monitoring with vCenter Server/vSphere Client.
• Installing and Configuring Solaris 10 by using Jumpstart server (Jet server) and also installed and configured Linux by using Kickstart server.
• Linux/AIX systems administration including operating system installation and upgrades.
• Monitoring the servers with tripwire host based intrusion detection system (IDS).
• Creating a baseline for Servers and monitoring the unauthorized changes to the files and directories.
• Upgrade of AIX TL and SP to latest level using NFS Mount and alt disk
• Creating Load Balancer and configuring it using the LVS cluster system.
• Managing UNIX Infrastructure and Netapp, EMC storage involving maintenance of the servers and troubleshooting problems in the environment.
• Track record of increasing responsibility in UNIX/AIX Server design, configuration and implementation.
• Responsible for using the API in Red Hat satellite to script commands inside it and also to exchange information with other management products.
• Experience working with Red Hat satellite capsule server.
• Used APT repositories on Ubuntu Server for installation of Gnome and KDE
• Database Profiling, Locks, Memory Usage, No of connections, page fault etc., Export and Import of Data to and From MongoDB, Run time configuration of MongoDB.
• Generated report on the Performance of the VM's and ESX servers using Virtual Center.
• Provided Administration access to User and Domain groups based on the request from the application owner to Guest OS.
• Ability to interact with Oracle admin, Install, Configure & manage Oracle servers.
• Worked with Oracle DBA team for the configuration of file systems like extending online file system as when required using VxVM.
• Create and configure postgres EC2 and RDS instances for testing.
• Monitored and configured security packages such as Power Broker, ESM.
• Responsible for maintenance of development tools and utilities and to maintain Korn, Shell, Perl automation scripts.
• Install, configure, maintain and troubleshooting in Netbackup 6.x in Enterprise environment.
• Worked on packages like SAMBA in Unix environment.
• Maintaining Service Management Facility (SMF) in Solaris 10.
• Worked on Solaris 9 and Solaris 10 upgrades projects and have expertise with SMF utilities; Zone Configuration and ZFS file systems.
• Symantec Netbackup Installation and configuration of Master/Media and clients for Windows/Unix boxes.
• Updating Master/Media NBU versions as well as clients.
• Working with Netback up GUI and Command line interface.
• Configuration of Volume Pools, Storage Units, Policies, Tape drives and Robot.
• Setup replication between Amazon RDS and MySQL Server for migrating data to AWS environment.
• Migrated the current Linux environment to AWS/RHEL Linux environment and used auto scaling feature and Involved in Remediation and patching of Unix/Linux Servers

Environment: Redhat Linux, Oracle Enterprise Linux, Red Hat Satellite Capsule server, Chef 10.x and 11.x Oracle Solaris, Symantec Netbackup7.6.0.3, Symantec Netbackup7.5.0.6, Netapp storage, Sun ZFS Storage, Oracle Database, Oracle ST SL8500, Bash, Chef, Linux 5.x, 6.x, Solaris 8/9/10, VMware, Keone, Controlsa, Kickstart.

Confidential, Chevy Chase, MD

Linux Administrator

Responsibilities:

• Automated security remediation configuration with tripwire across the environment.
• Working with DevOps Chef to automate Data center (Infrastructure Provisioning)
• Working on Chef Configuration Management Tool written in Ruby which involves automation of systems administrator tasks and knife usage.
• Configuring LVM and managing VG's- creating new VG (liner and stripped), extending VG, merging VG, splitting VG, exporting VG's.
• Configured LDAP clients on server test and troubleshoot for maintaining network and data security.
• Performed AIX 5.3 / 6.1 installation using NIM server and Storix back utility
• Upgrade AIX LPARS from AIX 7.1.3 to AIX 7.2
• Supporting other applications on the Linux/AIX servers like Ensemble and Epic.
• Administer user and groups using the SUSE Linux.
• Updating Master/Media NBU versions as well as clients.
• Working with Netback up GUI and Command line interface.
• Creating backup policies for Flat File, Oracle Database, Microsoft Sql Server, IBM Lotus Notes
• Managed multiple MongoDB (NoSQL) database clusters. Planned and implemented backup and recovery of the Mongo databases
• Troubleshooting the backup issues by analyzing the NetBackup logs.
• Working on command line interface of NetBackup.
• Responsibilities include but not limited to the following: updating OS, repair errors, and testing Mac computers to insurance smooth user interface using programs such as Xcode, and mac OS X Server.
• Configuring rsyslog server to maintain logs from multiple servers (APP, DB) onto a single server, further validating the logs during IBM audits.
• SSH configuration - using SSH Keys for password less and more secure login.
• Configuring SUDO privileges in /etc/sudoers file by granting or restricting accesses to users depending on client policy.
• Plan and coordinate the administration of PostgreSQL databases to ensure accurate, appropriate, and effective use of data, including database definition, structure, documentation, long-range requirements, and operational guidelines.
• Patching Linux servers and Linux VM's (running on VMware hosts) to 5.8 from lower versions of RHEL Linux (5.2, 5.3, 5.4, and 5.6).
• Experience on working with VMware VCENTER for VM Builds and VM upgrades.
• Working with vendors Oracle and RedHat in resolving issues during patching or upgrades.
• Maintain NOC infrastructure, and perform remote management of Firewalls, (Palo-Alto, Juniper), HP SANS, Citrix-Xen Servers, Cisco Switches manage NOC infrastructures: firewalls, storage controllers, switches etc.
• Install, configure and troubleshooting the network activities like plumb, unplumb, IPMP, routing etc.
• Hands on expertise in configuring and troubleshooting the netback client.
• Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.
• Troubleshooting and configuring NAS and NFS mount points.
• Performed capacity analysis, monitored and controlled disk space usage on systems.

Environment: RHEL 5.x,6.x, Red-Hat Linux Enterprise servers, VMWare, LPAR, DLPAR, Dual Virtual I/O, HACMP, Veritas Volume Manager, Multiple HMC-v7, WebSM, NIM, Bash/KORN Shells, LDAP, EMC Clariion - VNX, IBM storage, Linux, VIO 1.3, 1.5, 2.1, Samba, Oracle Enterprise Linux, Chef 10.x and 11.x Oracle Solaris, Symantec Netbackup7.6.0.3, Symantec Netbackup7.5.0.6, Netapp storage, Sun ZFS Storage, Oracle Database, Oracle ST SL8500

Confidential, Roseland, NJ

Linux System Administrator

Responsibilities:

• Installation, configuration and administration of Red Hat Linux servers and support for Servers.
• Installation, maintenance and regular upgrades of Red Hat Linux Servers using kick start based network installation
• Provided 24x7 System Administration support for Red Hat Linux servers and resolved trouble tickets on shift rotation basis.
• Provide the support of building the server, patching, user administration tasks, deployment, software installation, performance tuning and troubleshooting and KVM.
• Managed Compaq and Linux workstations and servers.
• Installation of patches and other software packages
• Monitoring system performance, tune-up kernel parameter, adding /removing /administering hosts, users, disks on DNS / NIS domain,
• Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security, Network management, dumb terminals and devices carried out.
• Installation and configuration of Oracle 7.x/8.x.
• Implemented NFS, DNS and NIS under SUN.
• Wrote bash shell scripts for getting information about various Linux servers
• Installed and Configured Send mail Utility on Linux Servers.
• Administered NFS Mounts.
• Troubleshooting Backup and Restore Problems, Creation of LVMs on SAN using Linux utilities
• Monitored overall system performance, performed user management, system updates and disk & storage management
• Performed OS upgrades and Patch loading as and when required.
• Worked as a System Administrator for AIX, UNIX, and Linux servers
• Configured IBM p5, B80, RS6000,520,550,570,590,595,610,690.695 for production, staging and test environments
• Install and configure DHCP, web (Apache, IIS), mail (SMTP, IMAP, POP3), and file servers on AIX and Linux servers
• Created and managed user accounts, security, Access Control Limits (ACL), permissions, disk space and process monitoring in Red hat Linux and IBM AIX
• Monitored Disk & Memory Utilization on AIX 5.1, 5.2
• Experience using LVM creating VGs, LVs, and disk mirroring.
• Installed and set up Oracle9i and Web Sphere on Linux for the development team.
• Implemented Virtualization using VM Ware in Linux on HP-DL585.
• Linux kernel, memory upgrades and swaps area. Red hat Linux Kick start Installation.
• Hands on experience of HMC & LPAR.
• System performance monitoring and troubleshooting in AIX Environments.
• Creating users, managing user permission, maintaining User & File system quota in Red hat Linux and AIX.

Environment: Red Hat Linux servers, KVM, Oracle 7.x/8.x, NFS, DNS and NIS under SUN, LVMs on SAN, Windows, Linux, Solaris 9/8/10, HP-UX 11.0, SPARC server 1000/20, AIX, UNIX, and Linux servers, DHCP, web (Apache, IIS), mail (SMTP, IMAP, POP3), Red hat Linux and IBM AIX, AIX 5.1, 5.2, Oracle9i, Web Sphere, HMC & LPAR