SUMMARY:

• Over 9+ years of experience specialized in System Administration working on Redhat Linux, Solaris, Suse Linux, AIX, Cent OS, OEL and Windows environments.
• Worked as Linux/Unix system administrator on Redhat EL 4.x, 5.x, 6.x, 7.x, CentOS, SUSE, Oracle Enterprise Linux, Solaris and VMware ESX environment.
• Working experience in implementing and administering VM's using VMware ESX 3.x, 4.x, 5.x and VSphere 4.x 4.1x 5.0x and vCenter.
• Experienced in Kickstart, Jumpstart, Infrastructure setup and Installation Methods.
• Planning, Installation and configuration of RHEL 4.x/5.x/6.x/7.x, along with installation and configuration of Kickstart.
• Excellent concepts of LVM and SVM creating new file systems, increasing and decreasing file systems, mounting file systems, un - mounting file systems and troubleshooting Disk space issues and experienced in deploying RHEL 4/5/6/7 in an enterprise setting.
• Performed kernel tuning based on the applications to be installed and the number of users.
• Proficient in Linux Utilities: KICKSTART, SSH, FTP, AUTOFS, Quota Management, wrappers, User Management, Process Management, Memory Management, and Text processing tools, Log Management, Package Management, Disk Management and Swap Partition/Files Management.
• Experienced working on SUSE Linux 2.x, 3.x and Ubuntu.
• Highly experienced in installing, configuring, and implementing Virtualization Environment using VMware, Oracle virtual box, Windows Active Directory and LDAP.
• Experience in implementation and maintenance of VMware, Amazon Web Services (AWS), DNS, DHCP, NIS, NFS, SMTP and Linux instances, Configured and administered server system Apache 2.x/1.x, Tomcat 7.x/6.x/5.x/, Web logic 8.x/9.x/10.x/11.x.
• Experience with installing, maintaing and troubleshooting hardware and software problems with AIX,HP-UX and RedHat Servers.
• Installation of Database servers and users management such as Oracle, MYSQL, SQL Server, Disk space and File system management using Veritas Volume Manager 4.x/5.x, Logical Volume Manager, ZFS and Monitor Disk space and space as needed in LVM.
• Accomplished Disk Mirrors and RAID 0, 1 and 5 levels on several UNIX/LINUX servers.
• Troubleshooting skills with network protocols such as DNS, TCP/IP, SMTP, and SNMP and worked SAN and NAS technologies.
• Coordinated with SAN Team for storage allocation and Disk Dynamic Multi-pathing (DMP).
• Experience with ticketing tools such as Remedy and Quick base, good working experience in basic UNIX scripts using Bash.
• Installation of Operating Systems, Packages and Patches, System Security, backup recovery, and performance tuning. Knowledge of system analysis, troubleshooting, and performance tuning system operating systems.
• Experienced in implementing the workload Management (WLM) using cloning and clustering.
• Worked on JBoss including installation, configuration, management and troubleshooting.
• Creating and maintaining user accounts, profiles, security, rights, disk space and process monitoring.
• File System servers with NFS with Auto mount clients.
• Experience on working automation tools Puppet, Chef, Jenkins and Vagrant and experience on monitoring tools like Nagios.
• Planning and setup of Disaster Recovery Servers.
• Experience with backup technologies like Tivoli Storage Manager 5.x/6.x/7.x and Veritas Netback up 4.x/5.x/6.x.
• Ability to multi-task and excellent team player with ability to work independently as well.
• Worked with Vendors on system issues and bugs for its resolution.
• Provide and reviewed technical support for technical documentation of UNIX/LINUX servers.
• Willingness to work on flexible hours for production, backup and on-call support for 24/7 environments.
• Self-motivated, committed to work, detail oriented, and excellent problem solving skills with leadership qualities.

TECHNICAL SKILLS:

Web/Applications servers: Apache 2.x/1.x, Tomcat 7.x/6.x/5.x, Web logic 8.x/9.x/10.x/11.x

Networking: TCP/IP, NIS, NIS+, NFS, DHCP, DNS WAN, SMTP, TELNET, FTP/TFTP, SNMP, LDAP

Languages: C,C++, C#, Matlab, HTML, Bash, Python, Perl &K Shell Scripting.

Backup and Recovery tools: Dump, Restore, Tar, CPIO, Rsync, Kernel re-compilation & Patches update, Kickstart Installation, Firewalls: IPTables; SELinux; ACLs

Hardware: IBM p-Series P690, P570, RS6000, Sun Fire, HP Proliant, G2, rx8640, rp7420, rp8420, N-Class, L-Class, D-Class, K-Class, T-Series M-Series, IBM/HP/DELL Blade Server r710, DELL Power Edge 8450, 6650, HP DL 360 G3/G4/G5, HP DL 380.

Database: Oracle11g, MySQL, DB2, SQL Server, Sybase, MS Access

Operating Systems: (O.S)/ O.S Applications Red Hat Enterprise Linux 4.x, 5.x 6.x and 7.x, CentOS 5.x, 6.x, Oracle Solaris 8,9,10, ESX, VERITAS Net backup 4.x,5.x,6.x

Scripting: Ksh, Bourne, Bash, Perl, Ruby

Virtualization: VMware and Vsphere.

Storage Hardware: Symmetrix DMX / DMX-2 / DMX-3 &EMC CLARiiON FC and CX Series, FC JBOD, Brocade FC Switches, SAN /NASNet App Filers, Qlogic and Emulex FC HBAs, Brocade silk worm, iSCSI/ FC Storage arrays, RAID Storage arrays, DLT and LTO Tape Libraries, Hitachi enterprise systems

Monitoring Tools: Nagios, Munin, Puppet, Cacti & Foglight

Integration Tools: Chef, Jenkins, Docker.

Filesystems: LVM, VxVM, SVM.

WORK EXPERIENCE:

Confidential, Manassas, VA

Linux Administrator

Responsibilities:

• Experience administering, installing, configuring and maintenance of Linux.
• Experience installing, upgrading and configuring RedHat Linux 5.x, 6.x using Kickstart Servers and Interactive Installation.
• Responsible for creating and managing user accounts, security, rights, disk space and process monitoring in Solaris, CentOS 5.x/6.x and Redhat Linux.
• Configuring DNS, NFS, FTP, remote access, and security management.
• Created Linux Virtual Machines using VMware Virtual Center.
• Installing, upgrading and managing packages via RPM and YUM package management
• Installed Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.
• Installing, configuring and supporting Apache on Linux production servers.
• Managing Patches configuration, version control, service pack and reviews connectivity issues regarding security problem.
• Managing systems routine backup, scheduling jobs and enabling cron jobs.
• Administered VMware Infrastructure Client 3.5 and Vsphere 4.x. & 5.x
• Working with Database administrators to tune kernel for Oracle installations.
• Applied patches every quarter regularly to meet audit requirements using Oracle Ops Center, Red Hat Satellite server, Up2Date, YUM, RPM tools.
• Integration tools configuration(Jenkins).
• Installing junkis on redhat distributions
• Worked on all facets of HP-UX Systems Admin including Oracle DB tuning at OS level,
• Creating, Resizing and managing online JFS Filesystem for users upon user request using Veritas Volume manager(VVM) and LVM.
• Perform LAMP installation and configuration on Ubuntu, Red hat and amazon Linux Instances.
• Installed and configured Drupal and WordPress on both Amazon Linux and Ubuntu EC2 instances.
• Configuring Physical and Logical components of VCS.
• Veritas Cluster Server (VCS) installation and troubleshooting issues on linux.
• Online backup for Veritas File System using file system snapshots
• Installation/Configuration of ESXi 3.5, 4.x and 5.1 servers and applying security patches to the ESXi servers.
• Experienced in monitoring and debug performance issues on different OS Linux (RHEL & Centos),
• Systems log management, Data backup and restoration with UNIX native tools (tar/dd).
• Installed and maintain puppet-based configuration management system, configure and managing LVM on Linux using tools like lv extend, lv create, resize2fs etc.
• Scanning the newly assigned LUNs to the serves and assigning them to volumegroup and increasing the file system using redhat volume manager.
• Worked on FTP servers for sending and receiving files between local and remote servers.
• Worked with MySQL, MS SQL Server, and their feature set and created database in Mysql as per the requirement.
• ITM agent installation, configuration and setup monitoring for application logs.
• Monitored system performance using sar, prof, vmstat, iostat, netstat, Nagios.
• Working with the native multipathing for the high availability installation / configuration on Red Hat clusters.
• Experience in administration & configuration management of Puppet on Linux and puppet enterprise management from the console.
• Modifying the manifest as per the requirement on puppet.
• Providing 24*7 on-call support on rotation basis and Handling High priority incidents through bridge calls.

Environment: Red Hat Enterprise Linux 5.x, 6.x, LVM, HITACHI, EMC, VMware VSphere 5.X, DNS, DHCP, DIG, SNMP, SMTP, Ethernet, netstat, NFS, NIS, nslookup, TCP/IP, tcpdump, Korn shell, Cisco switches & routers, chef, VLAN, Fiber Channel, Nagios XI, Perl, Bash, Tomcat and Apache and JBoss Eap 4.x.5.x.

Linux Administrator

Responsibilities:

• Worked on the installation, configuration, maintenance and trouble shooting of RHEL 5.x, 6.x, Ubuntu, SUSE, AIX servers.
• Worked on migration from physical to virtual (P2V) environment.
• Work on installation of VMware ESX 5.5 migration of Vm's and data storage, patch management, snapshot and template and clone.
• Created a mirror copy of bare metal into a virtual environment and switch production from bare metal to virtual.
• Used apache proxy to access Jenkins.
• Worked on backing up physical server, deploying the new VM on KVM hypervisor.
• Shutdown legacy physical server.
• Performed recovery from failed backup.
• Deployed Linux hardware Nodes to host several KVM templates.
• Created and managed user/group and sudo access on Redhat Linux.
• Install packages using RPM and YUM.
• Patch and Package administration to keep the servers updated with the patches and that implementing packages developed for deployment
• Created Bash scripts to monitor processes and making sure process startup when operating system restart using chkconfig and RC startup levels.
• Wrote scripts to automate daily tasks like creating LAMP stack VP's, VPS load testing, SSL installations, MySQL replication.
• Worked on solving issue related to LAMP stack web servers, both shared and VPS.
• Used Puppet for creating scripts, deployment for servers, and managing changes through Puppet master server on its clients.
• Assembled Puppet Master, Agent and Database servers on Red Hat Enterprise Linux Platforms.
• Designing and creation of process workflow maps and documents to understand a work process.
• Installation and configuration of Webserver (Apache 2.2.17), MySQL 5.5 and PHP in a LAMP stack.
• Testing for Incident, Problem, Change, and Service Catalog, Knowledge Management.
• Troubleshoot experience with API, Apache Tomcat issues.
• Troubleshooting OS and user problems on various Servers and on different platforms.
• Configuring, administering and trouble shooting of NFS.
• Setup static IP address for new server.
• Setup logrotate for application logs and system logs.
• Created and managed FTP web interface to manage and send files to customer FTP site using PHP.
• Installed and managed apache, MySQL, PHP, Perl modules on Redhat Linux servers.
• Managed user and database on the MySQL database.
• Installed and configured Samba to help printing and file sharing.
• Integrated, testing and on-going support of 24x7x365 systems.

Environment: Red Hat Linux 5/6, KVM, Acronis, IBM RS/6000, Disk Suite, Veritas Volume Manager 5.1, LDAP, DNS, NIS, NIS +, SNMP, Shell scripting, SENDMAIL, Apache 2.x, Puppet, Websphere, Sun and Veritas Clusters.

Unix/Linux Administrator

Responsibilities:

• Responsible for installing and configuring Red Hat Linux 6 using Kick Start server.
• Created new File systems and Logical Volumes, performed file system management and troubleshooting in Redhat 5,6.
• Installing and updating packages using RPM.
• Configuration and installation of DHCP, DNS, web (Apache), mail (SMTP, IMAP, POP3) and file servers on Linux servers.
• Implemented early stages of a continuous integration process based on Jenkins.
• Responsible for installing, integrating, tuning and troubleshooting Apache, Tomcat, Websphere and Weblogic application server.
• Collaborate on monitoring and troubleshooting Servers using various third party tools like Nagios.
• Deployed Puppet, Puppet Dashboard, and PuppetDB for configuration management to existing infrastructure. Deployed mcollective for orchestration.
• Installation and configuration ESX hosts. Making new virtual machines, with Linux Redhat server, making templates, cloning VMs using VMware Virtual Client 3.5.
• Managed users, disks, groups administration, File Sharing Permissions, backup and restore operations, and networking service.
• Automate configuration through Puppet.
• Involved in SAN migrations at host level using LVM mirroring and SVM Mirroring.
• Installing Redhat Linux using Kickstart and applying security policies for hardening the server based on the company's policies.
• Worked on VERITAS Operations Manager (VOM).
• Lockdown the local accounts to secure the environment using NIS.
• Setup, configured and maintained NFS, NIS, and TCP/IP network, setting up SSH and SCP features between hosts.
• Maintenance, performance, tuning and testing of servers for proper functioning.
• Managing routine backup, scheduling jobs, enabling system logging and network logging.
• Troubleshooting tickets using BMC remedy.
• Worked with DBAs on installation of Oracle database.
• Installed and configured Oracle RAC 11g for database purpose.
• Worked and performed data-center operations including rack mounting, cabling.
• Worked on creating disk groups, volumes, deporting, importing disk groups using VERITAS volume manager 5.1.
• Network trouble shooting using 'netstat', 'ifconfig' and Worked closely with vendors on Hardware Problems, software fixes.
• Setup user and group login ID's, password and network configuration.
• Developed bash shell scripts to automate routine activities.

Environment: Red-Hat Linux Enterprise servers 4/5, (HP Proliant DL, ML Series, IBM p series, x series, Dell Poweredge Servers R610, R710), X86/X64 platforms, ASR, Opsware, VMware, SAN (EMC, Hitachi), NAS (Netapp), Blade Logic, Puppet, Veritas Volume Manager 5.1.

Linux Administrator

Responsibilities:

• Responsible for installing and configuration of RHEL 4.0/5.0, CentOS 5, and SuSe.
• Implemented day-to-day tasks in RHEL 4,5 including user access, setting up sudo rules upgrading kernel, firmware, rpms as well as adding SAN disks.
• Configure IBM RS/6000 for production, staging and test environments.
• Data Centers support contains 700 + servers.
• Worked with installation and configuration of VMware ESX 3.x servers.
• Installation and configuration of Veritas Storage Foundation Suite, Volume Manager, Cluster Servers & Veritas File systems (Vxfs).
• Installation and Configuration of SSH, TELNET, FTP, DHCP, DNS.
• Local and Remote administering of servers, routers and networks using Telnet and SSH.
• Use of packages like SAMBA in integrating UNIX file systems.
• Setting up printers on UNIX / NT machines to work seamlessly across platforms.
• Helped Development team to provide the information and troubleshooting.
• Installation and configuration of Web Sphere, Apache, Web Logic, LDAP, and mail servers.
• Trouble shoot network issues using 'ndd', 'traceroute', 'netstat', 'ifconfig' and 'snoop' etc
• Installation and configuration of NFS, NIS, TCP/IP and ZFS.
• Interacting with various teams such as Database, Net-backup and SAN teams.
• Worked with Veritas Netbackup 6.5 for enterprise wide backup and recovery.
• Provided support for large number Production, Development and Test systems.
• Document process and procedures for system and database usage.
• Installed and configured RAID 0, RAID 1 and RAID 5.
• Creation and management of user accounts and groups according to the security needs and adding the packages and patches when needed.
• Network & Firewall troubleshooting.
• Documenting processes and troubleshooting scenarios on runbooks.
• Providing 24*7 on-call support on rotation basis and Handling High priority incidents through bridge calls.

Environment: RHEL,4.5, 5.0, SuSe, Veritas Foundation Suite, Veritas Volume Manager, Veritas Cluster Servers, Veritas Net backup 6.5

Unix/Linux System Administrator

Responsibilities:

• Responsible for administration and maintenance of Redhat Linux, Ubuntu and SUSE Linux Servers.
• Responsible for patching.
• Managed JVM & JBOSS, JBOSS EWS.
• Experienced with HP-UX, Tomcat, Apache, Apache Cassandra, JVM, JBOSS, F5 and MySQL.
• Developed and maintained installation and configuration procedures for new server builds.
• Monitored Disk space and Quota usage as needed in LVM.
• Implemented virtualization using VMware in Linux.
• Installation of VMware ESX 3.5 and administration of VMs.
• Patches and Package administration for installation of patches following company policy.
• Deploying and maintaining of the Virtual machines.
• Trouble shoots and corrects hardware and OS related problems.
• Monitored and conducted troubleshooting, patching, upgrades and backups when required.
• Performed System backup using tar, cpio for local systems.
• Worked on the configuration of server using monitoring tool like Nagios.
• Installed and configured DHCP, DNS, web, mail servers on Linux servers.
• Installation and management on Linux servers for applications like Apache and Tomcat.
• Installation &Up-gradation of Linux Configuring Hardware in all range of Machines from workstations to Enterprise servers.
• Performed Kernel Tuning for the better performance of applications like Oracle and disaster recovery solution.
• Used of Shell scripting to automate system administration jobs.
• Provided 24x7 on-call/Remote Support for UNIX Production Problems.
• Created and managed user/group accounts, password and setting up permissions.
• Responsible for tasks like managing Disk Space and File System.
• Dedicated to excellent customer service. Strong communication, documentation and teamwork skill.

Environment: Redhat 4.0/5.0, Ubuntu, SUSE Linux, E15K, E12K, E10K, E6800, E-6500, E5500, E-4500, E-3500, F5', Veritas file system, Web logic 8.1.

System Administrator

Responsibilities:

• Installation and customization of Red Hat Linux 4, and Window NT servers.
• Installation and upgrading of required patches.
• Performed regular maintenance.
• Supporting 150 Servers for multi locations.
• Implementing, managing and troubleshooting hardware devices and drivers, installing service packs and updating drivers.
• Troubleshooting of Network and Firewall.
• Managed user accounts and groups with disks and File systems.
• Administration, Monitoring, Managing Disk space and Data security on servers.
• Backup using tar.
• Documenting the installation of third-party software.
• Administering and monitoring DNS, NFS, NIS.
• Installation, Configuration of Web Servers using Apache on Linux, and NT Servers.
• Windows Client support and maintaining backup of all the logs of users and mail logs for future correspondence.
• Setup various user profiles, environment variables/security to ensure smooth operation.

Environment: - Red Hat Linux, DNS, DHCP, NFS, SAMBA, SMTP, Apache, and Windows NT.