SUMMARY

• Around 6 plus Years of experience in heterogeneous and complex Cloud/IT environments.
• Extensive experience with RAID using Volume Management Software like Logical Volume Manager, Veritas Volume Manager, Solaris Volume Manager.
• Experienced in Installation of Operating Systems, Packages and Patches, adding peripherals, maintaining user accounts, System Security maintenance, backup/recovery, performance tuning, troubleshooting at various levels etc.
• Experience on group and user access management. Hands on SUID, SGID, Sticky Bit, ACL.
• Extensive experience with Kickstart in Redhat Linux, Jumpstart in Solaris, Ignite in HP - UX.
• Expertise in implementation and maintenance of NFS, NIS, DNS, LDAP name services.
• Experienced in Linux / UNIX System Administration of REDHAT Linux 3, 4.0, 5.0, 6.x (ES, AS & WS).
• Strong knowledge of large-scale Linux server deployment methods, kernel compilation and configuration, performance monitoring and tuning.
• Excellent knowledge of load balancing and clustering techniques to ensure high availability.
• Excellent Virtualization experience with VMWare Technologies in an operational environment.
• Hands-on experience with VCS, Veritas Net Backup, Veritas Volume Manager.
• Hands-on experience with IBM, HP, SUN blade and rack servers.
• Strong knowledge of client/server services like NFS, NIS, DNS, DHCP, SMTP, POP3, HTTP/HTTPS, SSH, LDAP etc.
• Excellent experience in Firewall management, hardening OS security, scheduling job using Cron.
• Strong understanding of advance TCP/IP, UDP, IPv4, IPv4 subnetting, IPv6.
• Experienced with Oracle, MYSQL administration, performance tuning and troubleshooting issues.
• Experienced in updating server’s firmware (BIOS), updating packages and upgrading Linux distribution, applying security patch, kernel recompilation
• Hands-on experience in diagnosing, troubleshooting various networking, hardware & Linux/ UNIX server’s services issues and performing preventive maintenance.
• Experience with Red Hat Kickstart or scripted OS installation methods.
• Extensive work knowledge on Storage Area Networks (SAN), of EMC Symmetrix, CLARiiON CX300 Storage Arrays and Dell EqualLogic storage.
• Worked with Virtualization, NIS, NFS, DHCP Server, Samba, and TCP/IP on Linux server environment and LDAP client-server model to retrieve and manipulate data.
• Experience on Linux based server solutions like Apache, Sendmail, FTP, DHCP, DNS/NIS, SAMBA, QMAIL and NFS with AUTOFS.

TECHNICAL SKILLS

Operating Systems: Linux (RHEL, OEL), HP-UX, Solaris, AIX, MS Windows server 2000, 2003, 2008, 2012

Network Protocols: IPv4 + IPv6, Advance TCP/IP, SIP, DNS, DHCP, LDAP, FTP, VPN, VTP (VLAN), SNMP, SMTP.

Scripting Skills: Shell (BASH)

Database: MS SQL Server, PostgreSQL, MYSQLVirtualization VMware.

Clusters: Red Hat Cluster Suite, VCS

Training: RHCE (System administration, network administration and security), VMware vSphere, Veritas Net Backup.

PROFESSIONAL EXPERIENCE

Confidential, Atlanta, GA

Linux Administrator

Responsibilities:

• Installation, Upgrade and configuration of Redhat Linux, Linux, Ubuntu and Windows 2000, 2003, 2008, 2012 servers.
• Involved in creating new users, groups and setup their home directories and appropriate access restrictions to software in the Active Directory environment and NIS domains.
• Responsible for setup, configuration, and troubleshooting of complex Linux environments (e.g., Redhat Clustering, High availability etc.).
• Mass Build of Linux/Solaris OS servers using kickstart /jumpstart automation application.
• Worked extensively with Network File System (NFS) for storage.
• Conduct ongoing monitoring and maintenance to ensure stability and optimal performance on all server environments.
• Web Server configuration, apache-web logic integration, apache-tomcat integration.
• Ssh key installation, generation for sftp and SSh transaction for automation process.
• SSL certificate generation & installation for apache
• Check server utilization: CPU, RAM, network
• Carry out scheduled server maintenance and make sure backs are working properly
• Installed and configured and administrated VMware ESXi 5.5 server
• Installed operating systems windows 2008, Red Hat Linux
• Configured VCenter Server
• Created Cluster for High Availability (HA) and Distributed Resource Scheduling (DRS)
• Created template of VM and deployed
• Assisted in Migration of physical servers to virtual server using VMware Converter (P2V Converter)
• Migrated Virtual Machine using V Motion and also worked on storage Vmotion
• Performed snapshots, cloning, cold migration and hot migration
• Added ISCSI and NFS storage to VCenter
• Created VMKernal and VM port groups on Distributed switch
• Monitored Performance on VCenter
• Configured RAID and ILO on HP Server

Confidential, New York, NY

Systems Administrator

Responsibilities:

• Installation, administration, configuration of RHEL 4/5 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.
• Creating and cloning virtual machines in VMware environment using Virtual Infrastructure client 3.5 and Vsphere 4.0.
• Creating logical volumes, extending the filesystems using both LVM and VxVM 4.1.
• Perform daily maintenance routines on Linux servers, monitoring system access, managing file space and tuning the system for optimum performance.
• Respond to all UNIX systems problems 24x7 as a part of on call rotation and resolving them on a timely basis.
• Set up user and group login ID's, printing parameters, network configuration, password, resolving permissions issues, user and group quota.
• Updated DNS configuration based on the new servers that are rolled out.
• Worked and performed data-center operations including rack mounting, cabling.
• Configuring multipath, adding SAN and creating physical volumes, volume groups, logical volumes.
• Worked on various applications and improving their performance by performance tuning and analysis.
• Responsible for change management, troubleshooting and resolution of server issues for end users support.
• Installing and configuring Apache and supporting them on Linux production servers.
• Adding servers to the domain and monitoring them using nimsoft, cacti, sitescope.
• Assist System Administrators with various support issues.
• Writing shell scripts for Automated Back- ups and Cron Jobs.
• Tuning kernel parameters for optimum performance.
• Experienced in Troubleshooting critical hardware and software issues and other day-to-day user trouble tickets.
• Monitored server and application performance & tuning via various stat commands (vmstat, nfsstat, iostat etc) and tuned I/O, memory, etc.
• Installing, Administering and troubleshooting Windows Server 2003, 2008,2012

Confidential, North Brook, IL

Linux Administrator

Responsibilities:

• Install, configure, and maintain servers using enterprise standards and build process
• Provide problem management support for the production site and services - troubleshoot technical problems as they arise, design and implement long term solutions.
• Configured host-based and user-based security for the service using TCP wrappers
• Providing administration and troubleshooting user related problems.
• Work closely with DBAs, software partners and Staff in a proactive and solution oriented manner
• Maintaining RHEL 2.1/3, Redhat 9.0, SUSE 9 and 10 on Intel based servers.
• Patch Management, Package Installation/Upgrades and Kernel upgrades
• Installation and Configuration of Web servers like Apache, Jakarta Tomcat
• Used Webalizer for monitoring webserver logs.
• Installed Fedora core 2 having kernel 2.6.
• Used utilities like VNC, Nessus, Ethereal and Port Monitors.
• Wrote Scripts for system management and monitoring in Bash and Ksh.
• Configuration and deployment of Red Hat Linux as a Windows file server
• Performed the administration of the DNS and zone configuration
• Provided 7x24 on-call troubleshooting and problem resolution