Summary

• 7 years of experience in administering Linux RedHat, CentOS and openSUSE , Unix IBM AIX, Solaris, FreeBSD and Windows Servers for Research and Enterprise applications.
• Expertise to handle tasks in RedHat 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 Solaris 9 10, RedHat 4,5 6, CentOS 5 6 and open SUSE 11 12.
• Efficiency in providing application support and maintaining applications like Splunk, Web Methods and Nagios.
• Efficiency in installing, configuring and implementing the RAID Technologies using various tools like VxVM and SVM and configuring Hardware Raid using Raid Controllers.
• Strong Shell scripting skills, worked on various scripts for automation and monitoring servers, handling and manipulating raw data into required formats using scripting tools like sed, awk, cut and various others.
• Very strong understanding of Linux/Unix Kernel internals, Security, Patching and overall implementation.
• Hands on experience in Puppet deployment, dashboards configurations and PuppetDB.
• Hands on experience in various direct attached and networked connected storage concepts like LVM,NFS, RAID 0/1/5, SAN Fibre Channel, iSCSI Filers like NetApp and HP EVA storage.
• Good Solid understanding of OSI model, layers and various protocols like TCP/IP, UDP, TLS, SSL, HTTP, HTTPS, FTP, SFTP, SMTP, POP, IMAP, SSH.
• Very good understanding of Linux/Unix utilities like sar, iostat, vmstat, netstat and strace to troubleshoot performance issues and problems.
• Experience on Web servers such as Web server 6.0, Tomcat 5.x/4.x/3.x Apache Server 1.x/2.x.
• Configured and worked on HP ILO for HP servers, Idrac for Dell services ,SUN console for Sun hardware.
• Experienced in implementing the workload Management WLM using cloning and clustering.
• Creating Linux Virtual Machines using VMware Virtual Center and AIX LPARs on P550 and P570.
• 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.
• Excellent skills in problem solving, analysis, communication and documentation.
• 24/7 support for issues arising in production for mission critical and enterprise level applications.

Technical Skills:

Professional Experience:

Confidential

Systems Administrator

Duties Responsibilities:

• Monitored server and application performance tuning via various stat commands top, sar, iostat, vmstat, netstat, mpstat, prstat, nfsstat, prtconf, prtdiag, iostat, top, printmgr, hpimliview, dmidecode, smc etc and tuned I/O, memory etc for SUN Solaris and RHEL Servers.
• Building of more than 50 new HP servers in an existing cluster, Installing Redhat 5.8 Tikanga using Kickstart and configuring them at network and filesystem level.
• Configured and created multiple VM's and Virtual IP's in Apple Infrastructure Team.
• Provided support on applications like Splunk and Web-Methods.
• Upgraded Splunk application from 5.0.7 to 6.1 and also have expertise in configuring Forwarders on Splunk, installing and using of applications on splunk, performing splunk searches.
• Provided support for more than 300 Redhat web-methods servers.
• Performed system performance monitoring, created alerts and benchmarking for performance analysis on all application production servers.
• Developed multiple shell scripts for system monitoring and converting raw data into Splunk format.
• Provided troubleshooting solutions through automations and monitoring system stats on Splunk applications with the help of Splunk-dashboards during new Apple release.
• Working in war-room's, providing continuous technical support throughout release and production period.
• Expertise in handling crisis during heavy load on servers and maintaining zero downtimes.
• Fixed LDAP replication for the client. Configured the backup strategy between multi masters servers through replication. Provided product presentation on Virtual Directory, Directory Proxy Server and Migration of Directory Server.
• Environment: Redhat 5 6 Solaris 9,10 HP Gen 8 Blade and Rack mount Servers, IBM RS/6000 Splunk 5,6 servers WebMethods 9.1 Integration servers, MySql Database servers Ksh bash shell environment Infra Enterprise, EMC-Avamar Netbackup, IBM Storage Manager, HP, Cisco Works, Korn shell, VMware ESX3.5, Vsphere ESX4.0.
• Charter Communications, St. Louis, MO
• Sr. Unix/Linux Systems Administrator Mar 2013 June 2014
• Duties Responsibilities:
• Installed, Configured and Maintained Solaris/RedHat Linux Solaris 8,9 10, OEL 5/6, RedHat Enterprise Linux 4.x,5.x 6.0 on SPARC, x86 and Blade Centers.
• Supported Redhat servers in Production and Development environments.
• Worked on Virtualizing Redhat servers using vSphere 4.1/5.0 and managed ESX servers using vCenter and also worked with ESX Cluster and vMotion.
• Installed and Configured RedHat Linux Kickstart and booting from SAN.
• Configuration and administration of Fiber card Adapter's and handling of SAN SAN arrays, HITACHI, EMC .
• Performed SAN Migration on RHEL and solaris servers.
• Installation and configuration of backup clients like Avamar and Veritas Net Backup on Linux servers.
• Experience working with HP Openview client and server configuration.
• Experience in writing scripts to automate jobs and debugging scripts.
• Experience in using protocols like NIS, NFS, SSH, SFTP DNS.
• Installation and support of various applications like Weblogic server 10, WebSphere 6.1 JBoss 4.x, Apache 2.x, Oracle 9i, 10g, Mysql on Solaris 10.
• Administration of Websphere Application Server 6.x with Network Deployment, and Extension Deployment, on RedHat Linux.
• Mirroring of root disks using Hardware Raid Controller on HP Dell HW.
• Managed 100 UNIX servers running RHEL, HPUX Solaris on Oracle HP and Dell server including blade centers.
• Creating volumes using storage for VMAX Array on Redhat Solaris servers.
• Data migration at Host level using Red Hat LVM, Veritas Volume Manager and Solaris LVM
• Troubleshooting and performance tuning of various systems problems such as application, network and hardware related issues.

Environment: Solaris 8, 9, 10, Redhat EL 4.x, SuSe 10, IBM x3650,IBM HS22 Blade Center, IBM x232,IBM x236,T2000, T5120, E220, E420, 450, V240, V880/890, E3500, , BL460c, Dell M1000e, M600, SF 440, Infra Enterprise, EMC-Avamar Netbackup, IBM Storage Manager, HP, Cisco Works, Korn shell, VMware ESX5.1, VMware Vsphere ESX4.0.

Confidential

Linux Systems Administrator

Duties Responsibilities:

• Administered the entire heterogenous environment comprising of FreeBSD, RedHat Linux and CentOS.
• Installed and configured of hardware and OS Solaris 10, SUSE and RHEL 4/5 on x86 servers.
• To provide ongoing support in systems management and administration of LINUX/UNIX in global-scale environment.
• Installation and use of different Business packages on Solaris Platform.
• Provided 24x7 supports for various divisions within the Company and resolve all production issues in a high pressure and time sensitive environment.
• Network monitoring using NAGIOS tool.
• Implemented Puppet Version 3 for Automation in the Non-production environment.
• Issues related to NFS, NIS, and LVM, Grub corruption, configuration maintenance of RAID level 0, 1, and 5 .
• Troubleshooting VERITAS Volume Management and cluster server environment.
• VMware configuration, auto mount, installing Solaris/Linux software and patches, NTP and swap space, memory and capacity alerts, SSH and k5login and hung system reboots.
• Developing scripts in PERL and SHELL to automate the process.
• Disaster Recovery and Change Management: Designed and implemented disaster recovery solutions such as clusters using VERITAS Cluster server for storage replication and to allow seamless failover of IP on the DR site.
• Server Optimization and Workstations Consolidation.
• Installation of Windows Server 2003 and creating Active directory Users.
• Production Support Systems engineering duties related to Red hat system administration DNS, DHCP, NFS, NIS, LDAP, user account maintenance, backup recovery, Auto-mounting, License Management, Printer configuration.
• Created test scenarios for testing NIS, NFS, DNS and other functionality of the OS. Maintained system security, including password checks, permission scans, implementation of security ensuring tools Linux environment.
• Managed disk space on server systems using Software RAID and Logical Volume Manager.
• Installed and maintained web servers JBoss 4.x, Tomcat and Apache HTTP 1.3, 2.2 Web server in Red Hat Linux.
• Dealt with Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers.

Environment: Red hat Linux 3,4,5,6 Sun Solaris 8,9,10 Sun V440, V490 T5220 T5240 Sparc stations 20, Switches, VMware ESX 5.1, oracle 11, Veritas Cluster Server 5, Veritas Operations Manager.

Confidential

Linux Systems Administrator

Duties Responsibilities:

• Involved in Design, Configuration Implementation of Unix/Linux migration activities from 3PAR to EMC SAN devices like VMAX.
• Worked Primarily on RHEL 4/5 and Solaris 8,9 10 Operating Systems.
• Involved in migration activities using Redhat LVM, Solaris LVM, Veritas and EMC Open Migrator.
• Writing Shell and Perl Scripting for automation of job.
• Tuning the kernel parameters based on the application/database requirement
• Used Veritas File system VxFS and Veritas Volume Manager VxVM to configure RAID 1 and RAID 5 Storage Systems on Sun Solaris.
• File system tuning, growing, and shrinking with Veritas File system 3.5/4.x.
• Managed user accounts for the team access for Redhat Satellite Server.
• Build channels and pull the packages from master Redhat Satellite Server.
• Troubleshooting hardware, software and configuration problems for various protocols and topologies.
• Setup optimal RAID levels fault tolerance for protected data storage in NAS environments.
• Install and configure DHCP, DNS BIND, MS , web Apache, IIS , mail SMTP IMAP and POP3 and file servers.
• Created new slices, mounted new file systems and unmounted file systems.
• Upgraded Solaris 9 to Solaris 10 and worked with Solaris zones/containers/LDOMS, Used Solaris Cluster to deploy two-node cluster.
• Performed patching, backups on multiple environments of Solaris, Linux and VMware.
• Involved in preparation of functional and system specifications. Estimated storage requirements for applications.

Environment: Red Hat Linux RHEL 3/4/5/6 , Solaris 9/10, Logical Volume Manager, Sun Veritas Cluster Server, Global File System, Redhat Cluster Servers.

Confidential

Linux Systems Administrator

Duties Responsibilities:

• Installation, configuration and maintenance of TEST and UAT environments.
• Responsibilities ranged from daily tasks to more advanced ones such as shell scripting, software installation and system/network troubleshooting.
• Responsible for the Server Administration tasks in the web server support areas.
• Troubleshooted and debugged environmental and infrastructural problems found in the production and non-production environments.
• Installed and Configured Web, Application and Mail servers. Wrote shell scripts for automating tasks.
• Implemented High availability and disaster recovery with multiple data centers and plan rerouting of a fraction or entire traffic to a designated data center to avoid down times and SLA impacts.
• Automated Time Monitoring on Servers through shell script and added checkpoint to ensure the script is running via crontab entry.
• Analyze and suggest corrective methods on performance issues.
• Managed patching and upgradation of Operating Systems and other software to take care of security vulnerabilities and compliance.
• Adding additional and extension of existing File systems using VxVm and Vxfs..
• Performed snapshots and maintained backups of the machines as well the databases.
• Setup storage and networking for the entire application server pool and cache pool.

Environment: Red hat Linux 3,4,5,6 Sun Solaris 8,9,10 Sun V440, V490 T5220 T5240 Sparc stations 20, Switches, VMware ESX 5.1, oracle 11, Veritas Cluster Server 5, Veritas Operations Manager.

Confidential

Systems Administrator

Duties Responsibilities:

• Setup a couple of hundred VM's running CentOS to be used for web, database, application, mail, ftp, monitoring and git repositories.
• Installed and configured Red Hat Linux Kickstart and Solaris jumpstart Servers.
• Configuration of Hardware and Software RAID on Digital Sun Servers.
• Installation of Oracle Patches and Troubleshooting, Creating and modifying application related objects, Creating Profiles, Users, Roles and maintaining system security.
• Configured and Administration of VERITAS Cluster.
• Day to day maintenance of VERITAS cluster Servers.
• Configuration and maintenance of NIS, NFS, DHCP and DNS Servers on Solaris.
• Administrative tasks such as System Startup/shutdown, Backup strategy, Printing, Documentation, User Management, Security, Network management, dumb terminals and devices carried out.
• Responsible to handle the Server Administration and Asterisk Server Installation and Configuration in Linux. .
• Worked as part of Testing Team in Application testing using Manual methods and Scripts.
• Installed and implemented NAS with RAID 1 and RAID 5 configurations.
• Monitored load and performance on the infrastructure and added capacity as needed.
• Installation, configuration and management of postgresql mysql database servers.
• Client interaction for requirement gathering, so as to design and plan the software and hardware infrastructure.
• Familiar with Disk Management Utility. Hands on experience in file system creation and file system management.

Environment: Red hat Linux 3,4,5,6 Sun Solaris 9, 10, 11 ,HP DLseries G8, IBM X series, Logical Volume Manager, VERITAS Volume Manager, Solaris Volume Manager, VERITAS Cluster Server, Oracle 10g,11g,Vmware 5.1