PROFESSIONAL SUMMARY:

• Over 5 years of experience in UNIX/Linux/AIX System Administration. (RedHat, CentOS, Gentoo and kali, Ubuntu) and Windows Servers for Research and Enterprise applications
• Over 5+ years of experience as Linux/UNIX system administrator, Kickstart (PXE) and Jumpstart installation of various fully and mostly POSIX compliant systems like AIX 5L & 6, HP - UX, Solaris 9 &10, &8, RedHat 4,5 &6, CentOS 5 &6 .
• Experience in installing, managing Esxi 4.x and 5.x. (VMware barebones-guest OS). Hands on experience in virtualization technology with VMware (ESX/ESXi, vCenter, vCenter Converter, vSphere, vMotion), Xen and MS Hyper-V hypervisors.
• Experience in supporting ORACLE/Sybase/MYSQL Database.
• Installed and Configured security and application tool likeTCP wrappers, SSH, BIND, LVM (Logical Volume Manager), array and raid-manager, disk-suite, admin-suite.
• Experience working on boot loaders like GRUB and LILO and also upgrading Kernel on Redhat Linux servers.
• Hands on experience of IT automation software tools like PUPPET.
• Familiarity with Installation, Configuration and Administration of HP Data Protector & Veritas NetBackup.
• Experience in Redhat LVM, Solaris SVM, VERITAS Volume Manager, Veritas Cluster Server, VxFs, SVM, ZFS, Ext3, Ext4, UFS,ReFS,XFS.
• Experience in Configuring and Monitoring using NAGIOS, NAGVIS, NDOUTLS, ZENOSS, CA, SiteScope, Tivoli Tools and MRTG.
• Good Knowledge in automation by using Puppet and Chef Master server running on RHEL with around 600+ clients.
• Experience in working with LDAP/DNS/NIS/NIS+ services.
• Experience in managing and troubleshooting intranet, FTP and Mail Server and Managing Back-ups
• Experience in various tools like GNU make, awk, sed, top, iostat, vmstat, netstat, sar, ps, dig, strace, tcpdump, lsof, yum, rpm, ping, lookup, trace, tar and parted.
• Experience in Installation, support and maintenance of Unix/Red Hat Linux ES/AS 5.1 servers.
• Very good understanding in the concepts and implementation of high availability, fault tolerance, fail over, replication, backup, recovery, Service Oriented Architecture( SOA) and various Software Development Life Cycle(SDLC) methods.
• Very good understanding of Linux/Unix utilities like sar, iostat, vmstat, netstat and strace to troubleshoot performance issues and problems.
• Understanding of disaster recovery implementations.
• Experience in administrative jobs like User management, Security management, backup/restore and Package and Patch management.
• Knowledge in Oracle, MySql, Apache/Tomcat or web logic/JBoss.
• Experience in administration and maintenance of application service like DNS, Mail, HTTP, Apache, Tomcat, Squid, DHCP, SMPT, FTP, POP3, NIS, NFS and Samba.
• Experience in discovering, thereafter creating file systems on LUN from SAN environments.
• Developed UNIX shell scripts using Korn, Shell, Bash and Perl Scripting. Setting up CRON jobs for backups and monitoring process.
• Configure Clusters, Load-balancing, High availability and fail-over solutions & Web Server.
• Hands-on experience in diagnosing, troubleshooting various networking, hardware & Linux/ UNIX server’s services issues and performing preventive maintenance.
• Experience in round the clock service (24/7), and on call support.
• Ability to lead technical discussions and projects in an organized manner
• Ability to document strategies and designs and present to these ideas to management with cost/benefit analysis
• Solid understanding of OSI model, layers and various protocols like TCP/IP, UDP, TLS, SSL, HTTP, HTTPS, FTP, SFTP, SMTP, POP, SSH, LDAP( Add, Bind, Delete and Modify).
• Strong interpersonal skills, including both written and verbal communication skill.

TECHNICAL SKILLS:

Programming Languages: C/C++, UML Modeling, Assembly (A86 & MASM), JavaUNIX shell scripting (Bourne, Bash & Korn), HTML

Software: MS Project, Solstice Disk suite, SVM, Apache, Sun Raid Manager 6.1.1,NFS, Veritas Volume Manager 3.2/3.5/4.1, Send mail 8.12.x, SQL (Oracle 8/9 & DB2), Veritas Netback up 5.1

Operating System: Red hat 5.x 6.x /EP2/3/4/5, SuSE 9/10, Sun Solaris ( 9 & 10), AIX 5.3/6.1, 7.x. Windows 95/98/2000, NT

Hardwares: Intel Based Servers/PCs, Dell/ HP servers and PCS. Sun Ultra 5/10/60Sun Enterprise (E250/450, 5000, 6500),Sun A1000/D1000/3310FC Array, Netra T1, Sun Fire (280R, 420R, V210, V240, V250, V440, V480, V490, V880, V890),Linux Server, Dell PowerEdge 6300/500, Sun E250

Networking: NFS, AutoFS, NIS, DNS, DHCP, LAN, WAN

Tools: GNU make, awk, sed, top, iostat, vmstat, netstat, sar, ps, dig, strace, tcpdump, lsof, yum, rpm, ping, lookup, trace, tar and parted, Splunk, Puppet, Chef, Jenkins.

Virtualization: LDOM, ZONES, LPAR, VM Ware ESX & ESXi, vCenter, vCenter Converter, vSphere, vMotion, Hyper-V, KVM, Qemu and Xen Hypervisor.

Protocols: TCP/IP, UDP, ICMP, LDAP, BIND, HTTP, HTTPS, WGET, Git, SCP, RSYNC, DNS, DHCP, SSH, SFTP, SMTP and FTP

PROFESSIONAL EXPERIENCE:

Confidential, Coppell, TX

Linux/AIX Administrator ( Engineer )

Responsibilities:

• Performed installation, configuration and tuning of Linux, Solaris servers and AIX.
• Handling VERITAS cluster failover and troubleshooting server issues on both SUN and AIX servers.
• Installed PXE servers, Kickstart configurations for automatic Linux Installation.
• Installed OS patches and third-party application patches.
• Good working experience with Redhat Satellite Server for upgrading and installing Packages and patches in Redhat; and managing channels.
• Providing solutions for all kind of problem rising from Linux, Solaris, and AIX servers.
• Configuration of NIC Bonding on Linux and IPMP on Solaris.
• Build high availability servers using Redhat Cluster involving 2-5 nodes.
• Used bash, awk, and sed to automate most of the daily activities like log monitoring, log rotation and purging, proactive system monitoring with disk error detection.
• Installed and maintain puppet-based configuration management system, configure and managing LVM on Linux using tools like lv extend, lv create, resize2fs etc.
• Managed various servers using VMware vSphere ESXi 4.1 /5.0/5.1.
• Performed VxVM & VCS upgrade from 4.x to 5.x.
• Monitoring disk space, adjust VXVM configuration and add space as needed.
• Installed and implemented VMware ESXi 4.0 host servers with vSphere client, vSphere CLI. Configured HBA and iSCSI SAN storage.
• Managed virtual machines clones and templates, plan and implement VMware Fault Tolerance.
• Familiar with backup and restore of VMWare host server configuration, virtual machine backup, snapshot, P2V-V2V conversion with VMware converter & with other third party converters.
• Tuned Kernel parameters based on application and database requirements.
• Shell scripting for automating jobs.
• Configured and maintain volume groups, logical volumes and extended logical volumes using Logical Volume Manager.
• Worked with storage teams to configure EMC SAN, NAS and iSCSI configuration.
• Coordinating with vendor to determine RCA on few occasions; by facilitating veritas and solaris explorers, core dumps, RHEL sos reports.
• Monitor, Modify and optimize NetBackup activity, backup schedules and reporting to proactively avoid issues.
• Modifying the manifest as per the requirement on puppet.
• Configured and deployed of Nagios Monitoring system for managing all the Linux warehouse systems.
• Installed BIND package, updated the BIND database and troubleshoot the problems in Red Hat Linux DNS servers.
• Worked on the configuration of mail server using SendMail.
• Involved in corporate level auditing compliances like system security, network security and installation of recommended patches.
• Participated in migration planning, developing, testing and moving the migration process onto full-fledged production network.
• Performed User Account management, data backups, and user’s logon support.
• Implemented Network File System (NFS) for file sharing and network installation.

Environment: RHEL 5.X, 6.X, NFS, Solaris 9, AIX 5.X, 6.X, Send Mail, VMware ESXi 4.X, 5.X, Nagios, EMC, LVM, Dell PowerEdge 6300/500, Sun E250.

Confidential, Plano, Texas

System Administrator

Responsibilities:

• Involved in installation and configuration operating system Red hat Enterprise Linux (RHEL5.3 and RHEL 5.4) in development and test environments almost six levels on HP physical servers and Virtual Machines
• Worked with VMware ESXi 4.0
• Designed, managed, implemented/ supported: Backup/Recovery/Archive, Security Startup/Shutdown, Mass Storage (SAN/NAS), OS Installations/Patches, Hardware/Software installation, Batch scheduling, Data center Migration, Application and Server performance
• Worked in adding new Users and groups and give sudo access in test and development servers and central file synchronization via sudo users, authorized keys, passwd, shadow, group
• Worked with DBA team in installing and configuring Oracle 10 g and 11g, Sybase, Db2 client v 8.1 and v9.0
• Coordinated with application team in installation, configuration and troubleshoot issues with Apache, Web logic on Linux servers.
• Implemented automation tools such as Splunk, Puppet, Chef and DevOps.
• Used VERITAS Volume manager to create disk groups, volumes, volume groups, and RAID’s
• Involved in back up, firewall rules, LVM configuration, monitoring servers and on call support
• Involved in shell scripting for system/application in automating server task, installing and monitoring applications and data feeding file transfer and log files
• Involved in installing and configuring operating system Red hat Enterprise Linux in Production, QA and test environments on standalone IBM servers and IBM Blade Center Hardware
• Configured Kickstart for RHEL 5 to perform image installation through network
• Worked with Red hat Linux tools like RPM to install packages and patches for Red hat Linux Server and managed virtualized OS
• Worked on network connectivity, SAN storage, creating LVM and taking TSM backup
• Creating and managing user accounts and groups and their permissions and creating files and directories permission
• Co-ordinate with Middleware team in installation, configuration and troubleshoot issues with WebSphere Application Server and Apache/Tomcat server on Linux
• Installed/Configured/Maintained/Administrated the network servers DNS, NFS and application servers Apache and Samba server
• Extensively worked with the LAN/WAN, firewalls and routing for Internet and Intranet connectivity using different protocols like TCP/IP, DHCP, HTTP/s, FTP, SMTP & SSH
• Involved in DMZ firewall rules, configure iptables and iptables init script, start and stop init script for Apache and other application server
• Created BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.
• 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 cpuinfo to check the CPU utilization, bottlenecks of I/O devices, memory usage and network traffic
• To troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. To login to the remote system using sudo, putty and telnet. To transfer files across the systems on the network used ftp and scp commands
• 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: Red Hat Linux (RHEL 5), Oracle 10G, TCP/IP, DNS, DHCP, NFS, SAMBA, Apache, POSTFIX, POP3, SMTP, MySQL, Oracle

Confidential, LA

System Administrator

Responsibilities:

• System Installation and configuration (RHEL, Solaris, Windows Servers)
• Account,user and group administration, Permissions policy management and quota implementation.
• Systemperformance monitoring, tuning andlog management
• TCP/IP Networking troubleshooting and Linux Network Administration
• Installation, configuration, support and security implementation on following services:
• Management of Firewall, iptables
• Implement and maintain server virtualization using VMware
• Installation and configuration of database systems e.g. MySQL, Oracle
• System monitoring and remote connection management usingtelnetandSSHconnections
• Experience in setup Storage Area Network (SAN)and NAS and file systembackup and restore
• 24x7 on-call rotation for support of production systems

Environment: Sun Solaris, Red Hat Linux (RHEL 4), Oracle, TCP/IP, DNS, DHCP, NFS, SAMBA, Apache, POSTFIX, POP3, SMTP, MySQL, Oracle, VMware