SUMMARY

• Result Oriented Linux/Unix System Administrator with 6 years of experience in the industry with Sound knowledge of System Administration of Red Hat Linux Enterprise EL 4.x, 5.x, 6.x, Centos Linux 4.x, 5.x, Microsoft Windows Servers/XP, Suse 11.x, 12.x, VMware vsphere ESX/ESXi environment.
• Experience working in AWS cloud environment like EC2 & EBS and involved in supporting AWS VPC environment.
• Experience build and release DevOps engineering in automating, building, deploying, and releasing of code from one environment to other environment.
• Strong experience in Backup, Job Scheduling, Disk Management, Logical Volume Management (LVM), Logical Partitioning and troubleshooting network problems.
• Experienced in Configuring, Managing and Scheduling crontab’s for App Accounts and Backup Management.
• Configured Kickstart servers for complete hands free installation of workstations.
• Experience on Installation of VMware ESX, ESXI migration of vm’s from one host to another host and also from one data storage to another data storage, Patch management.
• Expertise in Building and supporting environments consisting Testing, Contingency, Production and Disaster Recovery servers
• Experience in configuring Oracle ASM disks and supporting Oracle RAC (Real Application Cluster) Database.
• Working knowledge on Automatic Storage Management (ASM).
• Good experience in Shell, Python, Ruby and Perl scripting.
• Experience with configuration management and automation software such as Puppet and Chef.
• Installed monitored and supported Web and Application servers on Linux environments.
• Creating and maintaining user profiles, security access rights and process monitoring.
• Installing and configuring DNS and DHCP. Experienced in creating and configuring zones.
• Working with SAN team for exporting shared volumes and mounting shared volumes.
• Working on SAN storage technologies using ISCSI TARGET and Network Storage Systems like DAS, NAS.
• Good knowledge on RAID groups and setting up NFS, CIFS, and ISCSI protocols on Red Hat.
• Expert in setting up SSH, SCP and SFTP connectivity between Linux hosts.
• Proficient in writing Shell scripts using bash for process automation of databases, applications backup and scheduling.
• Working with HP XEN Blade Servers. Attaching Disk space from DL - 360 Blade Servers to VM’s.
• Experience in setting up sudo access for application accounts.
• Good experience in making application accounts connect through password less SSH.
• Experience in Creating and maintain user accounts, profiles, permissions, security rights, disk space, and process monitoring.
• Experienced in maintaining daily backup of the servers, archiving of backups and restoration of them if needed.
• Extensive experience in Installation and Configuration of Windows 2003/2008 Active Directory.
• Familiar in LDAP setup and Administration.
• Experience in configuring firewall and security through SSL and iptables.
• Strong experience in System Administration, Installation, Upgrading Patches, Configuration, Troubleshooting, Security, Backup, Disaster Recovery, Performance Monitoring and Fine-tuning on Red Hat Linux Systems.
• Provided production support in an on-call rotation in a 24x7 environment.
• Excellent client relation skills and the drive to complete tasks effectively, and efficiently where customer service and technical skills are demanded.

TECHNICAL SKILLS

Languages: Bash, ksh, C, C++, SQL

Operating Systems: Red Hat 5/6, CentOS 5/6/7, SUSE 10/11, Windows NT 4.0, Windows 98/2000/2003, Windows XP/Vista, Windows 7/8/10.

Server Hardware: HP XEN Blade Servers, Proliant DL-360/DL-460, Dell Power Edge 1800/2850, Intel servers

RDBMS: DB2, Sybase, SQL Server (2008/2008R2), MYSQL 5.5, Oracle (9i, 10g/11g), MS Access

GUI/IDE: Visual Studio, Visual Studio .Net 2003,2005 and 2008, SQL Server Query Analyzer, MY SQL Query Browser

Utilities: NFS, NIS, DNS, DHCP, TCP/IP, SSH, LDAP, SMTP, VMware Server, VPN, iptables, route, HTTP, SAMBA.

Tools: Veritas Volume Manager, VMware ESX/ESXi, VMware vsphere, Puppet, Chef

Web/Application server: Apache, MySQL, DB2

PROFESSIONAL EXPERIENCE

Confidential, Buffalo, NY

Sr. Linux Administrator

Responsibilities:

• Installation, Configuration, and OS upgrades on RHEL 5.X/6.X, SUSE 11.X, 12.X.
• Implemented and administered VMware ESX 3.5, 4.x for running the Windows, Centos, SUSE and Red Hat Linux Servers on development and test servers.
• Creating volume groups, Logical volumes and extending them using LVM.
• Working with HP XEN Blade Servers. Attaching disk space from DL-360 blade servers to VMs.
• Responsible for setting up new instances, migrating existing services from physical servers to AWS cloud.
• Configure, monitor and, maintain AWS VPC environment.
• Working with SAN team for exporting shared volumes and mounting shared volumes.
• Installing and Configuring Puppet for configuration management.
• Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.
• Configuring, Managing and Scheduling CRONTABs for App Accounts and Backup management on a regular basis.
• Installed and configured Apache Web Server.
• Installed and deployed Weblogic and Websphere Application Servers (WAS).
• Worked on Puppet to organize and execute configuration plans on servers& worked on modules of Puppet for its manifests on servers.
• Create, maintain and manage automated build processes for AWS environment using Puppet.
• Developed scripts for automating administration tasks like customizing user environment, and performance monitoring and tuning with nfsstat, netstat, iostat, and vmstat.
• Created Bash shell scripts to monitor system resources and system maintenance and performed administrative tasks such as System startup/shutdown and Backup strategy.
• Created Disk groups, initialized physical disks to create a Veritas File System (VxFS).
• Import and Deport disks into a disk group depending on the requirement using the vxassist utility on the Veritas Volume Manager.
• Preparing servers for Oracle RAC installation, which includes creating ASM disks, kernel tuning, agent installation, adding NAS storage.
• Managed the User and Application Account creations, deletions, and setting up sudo access for DBA and application account access.
• Experience with running SQL queries on Oracle and MySQL.
• Administered security, users, group administration and daily backup and restore operations, networking service, performance and resource monitoring and Performed disaster recovery management procedures.
• Administration responsibilities include user, group, disk, and security management.
• Involved in preparation of functional and system specifications. Estimated storage requirements for applications.
• Worked with DBA team for database performance issues, network related issues and with vendors for hardware related issues.
• Worked with DBAs on installation of RDBMS database, restoration and log generation.
• Configuring and troubleshooting LAN and TCP/IP issues.
• Managed shared NFS, mounting and unmounting NFS server, NFS client on remote machine, sharing remote file folder, starting and stopping the NFS services.

Environment: Red Hat Linux 5/6, SUSE 10/11, HP Blade Series servers, VMware ESXi 5.x, Veritas Volume Manager, Veritas Cluster Server, Samba, Cisco Unified Computing System (UCS) blade servers

Confidential, Buffalo, NY

Linux Administrator

Responsibilities:

• Administration of RHEL 5/6 that includes installation, testing, tuning, upgrading and loading patches, troubleshooting both physical and virtual server issues.
• Creating, cloning Linux virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.
• Working in AWS Cloud Environment like EC2 & EBS.
• Worked with API's like AWS API for Creating and Managing Amazon Cloud Instances using Puppet Code and used puppet for provisioning.
• Installing Red Hat Linux using Kickstart and applying security policies for hardening the server based on the company policies.
• Administration, package installation, configuration of CentOS 5/6.
• Created disk groups, volume groups and RAIDs using Veritas Volume Manager.
• Installing MySQL on Linux Server and securing installation.
• RPM and YUM package installations, patch and other server management.
• Creating new file systems, monitoring disk usage, checking and backup of log files administration and monitoring the disk based file system.
• Configuring multipath, adding SAN and creating physical volumes, volume groups and logical volumes.
• Installing and configuring Apache and supporting them on Linux production servers.
• Kernel compilation and patch upgradation on Linux servers.
• Installed and configured Oracle 10g/11g RAC high availability.
• Familiar in LDAP setup and administration.
• Troubleshooting Linux network, security related issues, capturing packets using tools such as iptables, firewall, and TCP wrappers and NMAP.
• Developed automated processes that run daily to check disk usage and perform cleanup of file systems using shell scripting and CRONTABs.
• Creating and Managing Users / Group accounts and setup a user’s work environment.
• Monitoring the File System, CPU load for better Performance and system performance parameters using iostat, vmstat and prstat.
• Monitoring system performance, tune-up kernel parameter, adding/ removing/ administering hosts, users, disks on DNS / NIS domain.
• Performed the configuration and administration of DNS, NFS, SAN, NIS and database files.
• Worked on making DNS entries to establish connection from server to DB2 database.
• Performed OS upgrades and Patch loading as and when required.
• Backing up and restoring files across the network.
• Creating VM snapshots for test and deployment as well as in production change controlled release environment.
• Installing and Managing Virtual Center 5.5.
• Closely worked with development and QA teams.

Environment: RHEL 5/6, Solaris 9/10, IBM blade servers, Websphere 5.x/6.x, Apache 1.2/1.3/2.x, Oracle 11g/10g/9i, VM ESX 3.x/2.x.

Confidential

System Administrator

Responsibilities:

• Installed, upgraded and configured Red Hat Enterprise Linux 4/5/6.
• Configuration and administration of DNS, LDAP, NFS, NIS and NIS+ on Red Hat Linux.
• Hands on experience working with production servers at multiple data centers.
• Automated server building using Kickstarting RHEL 6 and Jumpstarting Sun Solaris 10.
• Troubleshooting production servers and configuring standalone production server for testing.
• Configured yum repository server for installing packages from a centralized server.
• Created local repository to connect Linux server to RHEL site for downloading packages and patches.
• Created local repository in yum.repos.d to run packages using yum, rpm and up2date.
• Configured and managed SELinux (Linux Firewalls) and allowed appropriate ports with help of iptables.
• Installed and configured DCHP server in Linux to give IP leases to production servers.
• Management of Red Hat Linux user accounts, groups, directories and file permissions.
• Configured, managed ESX VM’s with virtual centre and VI client.
• Performed Kernel tuning with the sysctl and installed packages with yum and rpm.
• Performed Disk management with the help of LVM (Logical Volume Manager).
• Configuration and Administration of Apache Web Server and SSL.
• Backup management using CRONTAB, running the backup based on client requirements.
• Password-less setup and agent-forwarding done for SSH login using ssh-keygen tool.
• Established and maintained network users, user environment, directories, and security.
• Documented testing procedures and steps involved in data migration on production servers.
• Provided 24/7 on call support on Linux Production Servers. Responsible for maintaining security on Red Hat Linux.

Environment: RHEL 4/5, CentOS 4/5, Fedora 9/10/11(beta), Ubuntu 8.10/9.04 Server, Debian SID, Vmware ESX, Veritas File System, Veritas Volume Manager, Veritas Cluster Server, HP Proliant DL 360, Dell Power Edge 2400, 2450.

Confidential

System Administrator

Responsibilities:

• Installation and configuration of Red Hat Linux 5.0 on servers, workstations and I/O devices on E4500 environment.
• System building from scratch for Linux system.
• Configured DNS Servers and Clients and troubleshooting system and DNS issues.
• Installed and configured new hard drives and memory.
• Involved in disk configuration and disk crash recovery using format and fdisk. Bad spots on disk were repaired using repair and analyze.
• Created new slices, mounted new file systems and unmounted file systems.
• Created Korn shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• Involved in preparation of functional and system specifications. Estimated storage requirements for applications.
• Installed all of the required Software, patches, documentation, licensing and troubleshooting.
• Setup various user profiles, environment variables/security to ensure smooth operation.
• Responsible for fax link and sending email.
• Disk Management Utility. Used daily for file system creation and file system management

Environment: RHEL 4.x, 5.x, HP BL685C Servers, Windows NT 4.0.