SUMMARY

• Over 7+ years of experience specialized in System Administration working on Red hat Linux 6/7, CentOS 5/6/7 and Windows environments.
• Experience in Administering Linux, Experience in Installation, Configuration, Backups and Maintenance on Red Hat Linux.
• Experience with Virtualization technologies such as Installing, Configuring and Administering Red Hat environment using KVM based hypervisors.
• Experience with RAID using Hardware Raid and Software Raid on Red Hat Linux in combination with Volume Management utility, Logical Volume Manager and Hardware RAID.
• Experienced in Performance Monitoring, Security, Troubleshooting, Backup, Disaster recovery, Maintenance and Support of UNIX systems.
• Having expertise in Red Hat, HPC clustering, (Beowulf), Windows Clustering. Solaris Container, Solaris Zones admin, Red Hat Kickstart, Jumpstart, WAN Boot servers, EMC storage devices and veritas Netback up version 6, server Disaster Recovery and data Recovery.
• Created and maintained user accounts, profiles, security, rights, disk space and process monitoring.
• Worked on version controls like GIT and SVN.
• Installing and configuring the Gateways for security communication.
• Worked on shell scripts for CPU usage, Memory consumption and number of I/O to collect performance statistics and troubleshooting issues if needed on Sun Solaris, Red HatLinux.
• Have working experience with Chef on AWS platform.
• Installed and configured VMware ESX server 3.x, 4.x, 5.x, and vSphere 4.0 on Dell power edge servers and HP servers.
• Deployed and configured VERITAS Volume manager (VxVM) and SVM for creating mirroring, striping, parity, New File Systems, mounting and un - mounting and data replication of File Systems on Sun Solaris, Red HatLinux.
• Configured Networks using DNS, NIS, NFS, FTP and DHCP, troubleshooting network problems such as Sub-netting, Routing, Firewall related on TCP/IP providing support for users in solving their problems.
• Configuring the SNMP Trap for the NWS, Channels, MME, UAs, ISSI gateways, Opensky Sites, P25 Phase 1 and phase 2 sites.
• Having good hands on experience in building RPM's and compiling the Linux kernel for different builds.
• Hands on experience on installing and configuring the KVM switches, creating the certificates using SSL
• Experience in installing and configuring Kick start inLinux.
• Experience in installing, administering, troubleshooting DNS, DHCP, NFS, LDAP, SAMBA, Postfix, FTP Servers in a heterogeneous environment.
• Experience in Logical Volume Manager for creation of Physical Volume / Volume groups / Logical Volume and File systems in LINUX / UNIX.
• Experience in Vmware software, Linux Virtualization, HyperV, NAS (Network Attached Storage) and SAN (Storage Area Network) using tape drives installing new tapes into magazines and unloads the magazines.
• Experience in networking concepts like TCP/IP, IP Addressing, Boot protocols, Terminal tools, Networking Technologies and WLAN.
• Hands-on experience in diagnosing, troubleshooting various networking concepts, hardware & Linux/ UNIX server issues, performing preventive maintenance.
• Experience in systems upgrades, patching Linux OS, kernel tuning and resource management for MySQL databases alongside DBA's in team projects.
• Configuring & Administration of Samba Server on Linux for UNIX File System Access on Windows Environment.
• Installed and configured recommended kernel setting for various applications such as MySQL/Maria DB.Excellent debugging skills and troubleshooting network related issues both on Ethernet and fiber.
• Good hands on experience on build environment using ANT.
• Creating and maintaining the Twiki pages for different users and different groups for documentation.
• Having good experience in Red Hat, EMC storage devices, Disaster Recovery like commVault 7.0, data Recovery, Hitachi storage devices and veritas Netback up version 6.
• Create the documentation for installation (installation Guide) in PDF format for the customer to understand how to install and also the known issues and unknown issues from the developer points of view what the content of the media and so on.
• Implementation of RAID levels using VERITAS Volume Manager.
• Problem determination and troubleshooting, Security using SSH and Shell Scripting.
• Working closely with other business units like deployment, DBA, SANAdminand BackupAdmin etc and other product vendors like EMC, SUN, Oracle.
• Performed all configuration changes to software and Patching, firmware upgrades to hardware with in the maintenance window with proper change management approvals.
• Self-starter, self-motivated and quick learner. Excellent interpersonal communication skills. Strong problem solving skills. Ability to work in a team or independently.

TECHNICAL SKILLS

Operating Systems: Linux (Red Hat Linux 6/7, CENTOS, Debian).

Hardware: HP ProLiant DL360, DL380, Blade servers, IBM Workstations.

Database: MySQL / Maria DB.

Services: NFS, SSH, VSFTPD, Rlogin, RPM, YUM, Samba, Auto FS, DNS, HTML, Telnet.

Monitoring Tools: VMSTAT, IOSTAT, FREE, NETSTAT, NAGIOS and TOP.

Networking: TCP/IP, UDP, LAN, WAN, DNS, DHCP, NAS, SAN, HTTP, HTML.

Web Applications: Apache Tomcat, HTTPD.

Directory Server: Openldap, SAMBA Server.

Messaging: Postfix, Sendmail.

Scripting: Bash Shell Scripting.

Security Application: SELinux, ACL.

Storage integration: NFS, RAID 0/1/5, LVM, SCSI, SATA, Ext 2, Ext 3, Ext 4, XFS and NAS.

Virtualization: KVM.

Other tools: KickStart, Puppet, SAR, PS, dig tcpdump, lsof, ping, lookup, Tarball and parted.

PROFESSIONAL EXPERIENCE

Confidential, Irvine CA

Linux Administrator

Responsibilities:

• Patching development, test and production servers based on given patch cycles and times.
• Recovered root password for older generation servers.
• Created RHEL virtual servers in VMware center from consolidated image and from attached image in data store.
• Adding new user and assigning permission and shared resources rights
• Installed red hat servers using puppet and foreman.
• Cloned virtual machines in VMware ESXi host and migrated between hosts.
• Established YUM repositories used in conjunction with the kick start server.
• Setup and configured DHCP, Kick start, and PXE servers for automated system builds using COBBLER.
• Setting up the servers (Red Hat and windows) for different kinds of application like UAS,RNM, VNIC, RSM, Activity Warehouse, NTP time servers, Log logic, KMF and ISSI Gateways.
• Carrying out production readiness reviews.
• Configured local repositories for development servers that were not connected to the satellite server.
• Configuring and setting up NFS file systems.
• Chron jobs set up and administration.Creating and maintaining auto-scaling groups using Asgard.
• Worked on creating cloud formation templates for dev, test, staging and production.
• Worked on S3 buckets to store AMI's and Logs on the cloud.
• Customize and cross compile linux kernel for the hardware which they use in the product(PPC).
• Does a health check and cloud watch on the servers.
• Support and detailed troubleshooting of Linux in a 24 x 7 Environment.
• Worked on upgrades without downtime using yum and as well as setting servers locally for upgrades.
• Responding to alerts thrown by monitoring tool (HPOV).
• Scanning for LUNS allocated by storage team and creating logical volumes and file systems from them
• General troubleshooting supported the audit teams.
• Software installation and configuration through puppet (OS / Network / web related).

Environment: SUN Solaris 8/9/10, RHEL 5.x/6.x, VMware ESX5.x, Apache 2.2.x, SuSE EL 9/10, Web Logic 10/11g, web Logic 8.x/9.x, Sun Fire T1000, T2000, Sun M9000, M5000, M3000, Sun X3-2, X3-4, HP C Blade System,BL460c, BL420c EMC, Veritas Storage Foundation 5, Veritas Cluster Server 5.1, VMware.

Confidential, Montvale NJ

Linux Administrator

Responsibilities:

• Provided Level 3 Production Support (24/7) to businesses internally, for 700+servers, managed and maintained Solaris 8,9,10 and Redhat/DebianLinuxresponsible for any issues which were hosted on Solaris and Dell servers. Also maintained F5 load balancers.
• Provided application support for the in-house applications such as Intelliconnect and SAAS, on Red HatLinuxboxes.
• Clustered File Systems GPFS, GFS and OCFS2.
• Installed, secured, and configured AWS cloud servers withLinux, Tomcat, MySQL, Apache, etc.
• Migrated configuration management from Chef to Puppet. Working experience on Devops.
• MigratedLinuxand Solaris servers from MHE Infrastructure to new MHFI infrastructure.
• Configured and managed application servers (Tomcat, Webloic), web servers (Apache, Nginx), LDAP, DNS and Content delivery network.
• Managed content repository systems like GIT, SVN, CVS.
• Performed Cleanup tasks on the Migrated Servers like configuring backup, removing unwanted routing information and verifying the health of the server.
• Managed File system using VERITAS volume manager 5.0.
• Performed Production support and implemented project based RFS work to build servers from scratch, installed application and performed lockdown across Production Servers before they go live.
• Configured DNS, NFS, and NIS & SENDMAIL services onLinux. Implemented Firewalls routing for connectivity using DHCP, TCP/IP, and LAN/WAN, HTTP/s, SMTP, and SOAP & SSH protocols.
• Installed and configured Red Hat EnterpriseLinuxusing kickstart, Sun Solaris using jumpstart and AIX Servers using NIM.
• Installed and configured Logical Domains across T5440, M5000 Servers from the scratch.

Environment: RHEL 4.x/5.x, DebianLinux6/7, Solaris 8/9/10, VERITAS cluster server 5.0, VERITAS foundation suite 5.0, Apache 2.2.x, Oracle 9i,10g, JBoss 4.2, VMware, Sun Fire x4100, x4200, x4250, T2000, T5440, M3000, Dell R805, EMC Symmetric 8830, 8840, DMX -3 NFSbash and Perl, Python scripting.

Confidential

Unix/Linux Administrator

Responsibilities:

• Installed, maintained and upgraded RedhatLinuxand Solaris Servers using kickstart based network installation.
• Configured and administered multiple production Redhat 4.0, 5.0 servers across multiple platforms.
• Configured and maintained the volume groups, logical volumes using LVM, VERITAS Volume Manager and Solaris Volume Manager.
• Implemented rapid-provisioning and life-cycle management forLinuxusing Amazon EC2, Chef, and custom Ruby/Bash scripts.
• Supported Oracle 9i, 10g database server applications and processes on Redhat 4.x, 5.x servers.
• Installed the Redhat 4.0/5.0 operating system and set up the Oracle environment.
• Managed JBoss and Java applications acrossLinuxservers.
• Did centralized management ofLinuxboxes using Puppet.
• Configured PXE environment for Kick Start installation for Red HatLinux. Writing shell scripts for the routine tasks.
• Installed and configured VMware ESX server 3.5, 4.0 and Vsphere 4.0 on Dell power edge servers
• Experience in Kernel fine tuning for maximum files, oracle database installation, ip forwarding, and network issues.

Environment: RHEL 4.x/5.x, Solaris 9/10, VERITAS cluster server 5.0, AIX, VERITAS foundation suite 5.0, Apache 2.2.x, Oracle 9i,10g, JBoss 4.2, VMware, T5440, M3000, Dell R805, EMC Symmetric 8830, 8840,DMX -3 NFS, and DNS, EMC, Shell, bash and Perl scripting.

Confidential

Linux Administrator

Responsibilities:

• Day to day operational support and maintance for Redhat 4 & 5 servers and Debian servers.
• Install Redhat enterpriseLinux5 & 6 using kick start configuration.
• Configured Network bonding, logrotate, password policy, samba security setting in all theLinux servers.
• Applying OS patches onLinuxservers.
• Monitoring logs and processes forLinuxand windows servers.
• Working on VERITAS VXFS andLinuxLVM file systems.
• Working on Cluster issues like fail over and fail back of service groups, creation of service group and add correspondence resources into the group, setting proper dependency, freezing of service groups during activity. Creating VERITAS volumes and file systems and extend of vxfs file system.
• Finding the root cause of issues by checking system logs, VERITAS logs and working with Redhat and HP to fix the issue.
• Working on ILO firmware, driver & BIOS upgration.
• Worked on activity like power path up gradation, multipath to power path migration, storage migration using LVM.
• Written scripts to monitor disk space, server load, cluster service status, worked on scripts to resolve ftp file transfer issues.
• Installing & upgrading VMware tool inLinuxVMs.
• Worked on business critical issues and resolved within SLA and provided proper RCA to customer.
• Preparing SOP forLinuxactivities.
• Working on likewise to integrateLinuxwith AD authentication.

Environment: Red Hat Linux (RHEL 4/5), Red Hat Cluster Servers, Oracle, MYSQL, DNS, NIS, NFS, Apache, Tomcat, Logical Volume Manager.