SUMMARY:

• Over 8+ years of IT industry experience as System Administrator and Production Support of various applications on Red Hat Enterprise Linux environment.
• Experienced in installation, configuration, support, upgrading and patching Linux servers using Red hat Satellite Server and also worked on registering different client servers and involved in building channels and pushing the packages to master Red hat Satellite server.
• Experience in installation and management of network related services like DNS, Apache, LDAP, SAMBA, HTTPD, VSFTP and SMTP.
• Experience in Installing, configuring and maintaining Samba, Apache, Websphere & Weblogic Application Servers.
• Expertise to handle tasks in Red Hat Linux includes upgrading RPMS using YUM, kernel, HBA driver, configure SAN Disks, Multipathing and LVM file system.
• Well experienced in hands on Kickstart (PXE) and Jumpstart installation of various fully and mostly POSIX compliant systems like Redhat 4, 5 &6, CentOS 5&6 and openSUSE 11&12.
• Experience in different versions of OpenStack, VMware and other private cloud servers.
• Experienced working with DHCP/LDAP/NFS services.
• Support enterprise Storage Area Networks (SAN), and Tape Backup/Restore technology in a mission critical environment.
• Experience in using various network protocols like HTTP, UDP, POP, FTP, TCP/IP and SMTP.
• Experience in storage technologies like Net Backup, Hitachi, EMC storage, NetApp, SAN.
• Software package deployment, disaster recovery/contingency of business management.
• Expertise in implementations and designing of disaster backup and recovery plan .
• Very good understanding in the concepts and implementations of high availability, fault tolerance, failover, replication, backup, recovery. Service Oriented Architecture (SOA) and various software Development Life Cycle (SDLC) methods.
• Excellent skills in problem solving, analysis, communication and documentation.
• 24/7 supports for issues arising in production for mission critical and enterprise level application

TECHNICAL SKILLS:

Systems: Red Hat, Fedora, SUSE, Debian, Ubuntu, CentOS, Sun Solaris and HP - UX

Cluster: Red Hat Cluster

Tools: WebLogic 10.x/9.x/8.x, WebSphere, Apache HTTP/ Tomcat/JbossVERITAS Volume Manager, VERITAS Netbackup, Cluster server 3.5 &4.1,VMware

Languages: Shell scripting

Networking: TCP/IP, NIS, NFS, DNS, DHCP, LAN, FTP/TFTP, SSH, SFTP, ARP

Storage: LVM, SCSI, SATA, Ext 2, Ext 3, Ext 4 and NAS(NFS, SAMBA, RAID 0/1/5) and SAN(iSCSI, Fibre Channel)

PROFESSIONAL EXPERIENCE:

Confidential - Chicago- IL

Sr. Linux Administrator

Responsibilities:

• Installed, Configured and Maintained RedHat Linux ( RedHat Enterprise Linux 4.x, 5.x 6.X & 7.x) on SPARC, x86 and Blade Centres.
• Supported RedHat servers in Production, Test and Development environments.
• Installing the Load Balancers and VPC with Public and private subnets.
• Responsibilities include designing and developing new back-end services, maintaining and expanding our AWS infrastructure, and providing mentorship to others on my team.
• Installed and Configured Red Hat Linux Kickstart and booting from SAN.
• Installation of SAMBA utility software for sharing files with Windows hosts
• Expertise in security hardening (iptables/selinux) major Production Servers, and compiling, building and installing web server based Linux tool
• Functional knowledge of core protocols such as TCP/IP, SSH, SMTP, LDAP, NFS, DNS, Active Directory, SSL,Apache, Tomcat..
• Responsible for the planning, testing and implementation of server software patches and upgrades as scheduled.
• Coordinated with FE for faulty hardware replacement (SB, CPU, DIMM, HDD etc) which caused for panic/reboot.
• Configured services like DNS, NFS, SAN, Sendmail, FTP, Remote access on Red Hat Linux.
• Creating and managing file systems, and building & maintaining storage volumes using Logical Volume Manager (LVM).
• Installing and configuring Apache and supporting them on Linux production servers.

Environment : VMware ESX 4.x, 5.x,RedHat 4.x, 5.x, 6.x, SuSe 10, 11, Confidential x3650, Confidential HS22 BladeCenter, Confidential x232, Confidential x236,T2000, T5120, E220, E420, 450, V240, V880/890,E3500, HP BL460c, Veritas NetBackup.

Confidential - Chicago IL.

Linux System Administrator

Responsibilities:

• Installation, configuration and Operating System upgrade on, Red Hat Linux 4.x, 5.x, 6.x, 7.x
• Performance Management & Tuning of RHEL.
• Veritas File system and Veritas Volume Manager are used to configure the RAID 1 and RAID 5 Storage Systems
• Installed, configured, and login 1,500 servers
• Installed and configured SAMBA server for windows and Linux connectivity.
• Implemented and configured Backup policies and Storage Units.
• Tuning the kernel parameters based on the application/database requirement.
• Monitoring system resources, logs, disk usage, scheduling backups and restore.
• Configuring SUDO and granting root permission to users for performing certain activities.
• Upgrading RHEL 5.x to RHEL 6.x using live upgrade and manual upgrade.
• File system tuning, growing, and shrinking with Veritas File system 3.5/4.x
• Writing to scripts in Python or bash to solve the issues and for automation.
• Worked on network connectivity, SAN storage, creating LVM and taking TSM backup.
• Modifying user's password policies, group policy, UID and GID assignment policies.
• Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpu info to check the CPU utilization, bottlenecks of I/O devices, memory usage and network traffic.
• Troubleshoot network connectivity used ping, netstat, ifconfig, and traceroute commands. Login to the remote system using sudo, putty, and telnet. Transfer files across the systems on the network. Linux technical support and prepared technical documentation for check in verification.
• Regular backing up of critical data and restoring backed up data. Worked in solving tickets issued on day to day activities and problems related to development and test servers.

Environment: Redhat Linux 6.X,7.x, HP & Dell Servers, SUSE, Oracle/DB2, VMWare ESX 4.x, Autosys, VMware VSphere, ESX, Bash, Shell Scripting.

Confidential

Linux Administrator

Responsibilities:

• Installed and configured several hundred Red Hat Blade and VMware Esxi 4.x Virtual Environment.
• Configured Red Hat Cluster Nodes for any legacy applications and verified the daily health check on the Cluster Nodes.
• Assisted in physically installing, racking and cabling new BM Bladecenter S and Cisco UCS 5108 Chassis environment.
• Installing and configuring Red Hat Enterprise Linux 5, 6.1 using kick start servers and virtual
• Installing and updating packages using YUM (custom YUM servers/repositories) and Red Hat Satellite Server.
• Configured and Administered Apache, VSFTPD services
• Configured various alerts, captured support logs and configured resource pools utilizing Cisco UCS Manager.
• Configured and deployed patches, upgrades, bug fixes on both physical and virtual Redhat Linux servers using satellite servers.
• Implemented rapid provisioning and life cycle management for RedHat LINUX using kickstart
• Expertise in security hardening (iptables/selinux) major Production Servers, and compiling, building and installing web server based Linux tools.
• Experience in performing, uploading and upgrading new firmware on the Interconnects and Chassis
• Proficient in providing support on the deployed Red Hat Enterprise Linux & Sun Solaris servers from both operating system level and application Level.
• Expertise in working with MySQL databases , Apache Web server, Tomcat Application Servers
• Troubleshooting any performance or configuration issues with MySQL and Oracle.
• Expertise in hardening, Linux Server and Compiling, Building and installing Apache Server from sources with minimum modules.
• Monitoring and troubleshoot backups and schedule Cron jobs.
• Extensive experience in network management TCP/IP, NIS, DNS, NFS, VLAN.
• Patch management of servers and maintaining server's environment in Development/QA/Staging/Production.

Environment: VMware 4.x, RHEL 4.x/5.x/6.x, Solaris 9, 10&11, HP UX, Centos, SUSE 10, 11,

VERITAS Volume Manager 3.x/4.x, VERITAS Storage Foundation 5, RedHat Cluster, VERITAS

Cluster Server 4.1, Tripwire, NFS, DNS, SAN/NAS.

Environment: VMware 4.x, RHEL 4.x/5.x/6.x, Solaris 9, 10&11, HP UX, Centos, SUSE 10, 11,

VERITAS Volume Manager 3.x/4.x, VERITAS Storage Foundation 5, RedHat Cluster, VERITAS

Cluster Server 4.1, Tripwire, NFS, DNS, SAN/NAS.

Confidential

Linux Administrator

Responsibilities:

• Installed, configured & handled troubleshooting of Solaris 8/9/10 and Red-Hat 3/4 on Sun Enterprise Servers and AIX on Confidential Blade Servers.
• Set up the Domain Name System by configuring the DNS primary, secondary and DNS Clients and configured the database files.
• Administered the Network of 400 UNIX Users using Shell Scripts.
• Monitored the Network and System Performance through vmstat, iostat, grapher tool.
• Configured backup and restoration of data from tape in Dump and Tar format using Shell Scripts.
• Implemented backup strategies based on the company policy using Shell Scripts.
• Recovered data from server after a ROOT file system crash.
• Created and added Swap Space at runtime.
• Part of team for Installation and configuration of DB2.
• Configured additional storage devices, partitioned hard disk based on the project requirement.
• Installed several security packages like SNORT, tcpd, tcp-wrappers & ASSET.
• Implemented security in systems and network for all Sun Enterprise Servers & Desktop Servers.
• Handled Day-to-Day operation of all servers running Production jobs, Backups, Restores and Report generations.
• Worked with heterogeneous Client & Server management.
• Backed up and restored data from tape in ufsdump, tar, cpio & dd format.
• Configured the Sendmail configuration file, created e-mail ids, created alias database.
• Handled troubleshooting the configuration file, configured the Boot file for the Domain Name Server to boot, configured and updated the Zone database.
• Installed various software packages such as tcpd, ipfilter and patching the appropriate software.
• Planned for storage and backup including studying the disk space requirement and backup device performance.
• Tested and implemented various types of software for backup.

Environment: Sun Fire 4800, 3800, V880, V440, V490/890/240, RHEL, Confidential Blade Servers HS20/LS20, Confidential xSeries 335/336/345/346/365 , Compaq, Red-Hat Linux 3/4, Solaris 8/9/10, Oracle 9i/10g, Bash, SNORT, NAS, Send mail, DB2, VERITAS Net Backup, VERITAS Volume Manager 3.0, EMC SAN.

Confidential

Systems Admin

Responsibilities:

• Installation, Configuration, Upgradation and administration of Redhat Linux.
• User account management and support.
• Good knowledge on Multipathing
• Jumpstart & Kick-start oS integration, DNS, DHCP, SMTP, Samba, NFS, FTP, SSH, LDAP integration.
• Scanning the newly assigned LUNs to the servers and assigning them to volume group and increasing the filesystem using Red hat volume manager
• Responsible for configuring and managing Squid server in Linux.
• Configuration and Administration of NIS environment. Managing file systems and disk management using Solstice Disk suite.
• Involved in Installing and configuring of NFS.Worked on Solaris volume manager to create file systems as per user and database requirements.
• Troubleshooting the system and end user issues.
• Responsible for configuring real time backup of web servers. Log file was managed for troubleshooting and probable errors.
• Responsible for reviewing all open tickets, resolve and close any existing tickets.
• Document solutions for any issues that have not been discovered previously.
• Worked with File System includes UNIX file System and Network file system. Planning, scheduling and implementation of O/s. patches on both Solaris & Linux.
• Created file systems using VERITAS volume manager & VERITAS File system. Administration of Disks and File systems using SVM and Veritas Volume Manager.
• Developed various shell scripts to automate aspects of systems maintenance. Handled Installation and configuration of Solaris and Linux on Sun Servers.
• Troubleshooting of problems related to hardware, operating systems, third party applications & scripts.
• Performed Linux systems performance, tuning, and enhancements. Involved in the design and implement of HA (High Availability) and Load Balanced solutions.
• Proactively reviewing incident trends and report recurring issues to Problem Management.
• Participating in Emergency Power Outages and Disaster recovery procedures.