SUMMARY

• Nine+ years of experience in administration of Red Hat Enterprise Linux, Oracle Enterprise Linux, SUSE Linux Enterprise Server, IBM AIX, VMware ESXi and Oracle Virtual Machine Server.
• Configured DHCP, Xinetd, HTTP server to enable kickstart methodology for mass deployment of RHEL and SUSE servers
• Installed security patches and updated RHEL and SUSE servers using utilities like yum, yast and zipper
• Configured clusters using Red Hat Cluster Suite and utilities like ricci, luci and gfs2
• Created PVs, VGs, LVs and resized file systems using RHEL’s Logical Volume Management
• Migrated PVs between storage arrays using pvmove
• Recovered file system using fschk
• Configured infrastructure services like DNS, NIS, NFS, LDAP, Send Mail, FTP, SSH on RHEL
• Experience in installation and configuration of Network Print Servers on Red Hat Linux
• Updated the kernel releases of RHEL and Unbreakable Enterprise Kernel of OEL
• Proficient in installation and configuration of Oracle on OEL and RHEL
• Patched and updated RHEL from version 5.x to 5.11 and 6.x to 6.7
• Added users and groups on linux servers using utilities like luseradd and lgroupadd
• Extensively worked on system monitoring using syslogd
• Took weekly online backups of the database using TSM
• Ensured system security by hardening and auditing the systems as per guidelines in Red Hat Linux
• Experience in system analysis, troubleshooting and performance tuning of RHEL
• Fine - tuned kernel parameters as per the applications’ requirements
• Configured samba server on RHEL to exports Linux file systems on to the windows platform
• Configured iptables to block ports on RHEL as per the security protocols
• Configured multipath using utilities like DM-MPIO and EMC PowerPath
• Analyzed network traffic using utilities like tcpdump and wireshark
• Troubleshot RHEL servers through the maintenance mode, rescue mode and single user mode
• Analyzed performance through performance monitoring tools like vmstat, iostat, sar, nmon, topas, iperf

TECHNICAL SKILLS

Operating Systems: Linux (Red Hat 8/9/AS4, SUSE 10, SLES 9/10 & Debian), RHEL 5.x/6.x/7.x, Windows NT, Solaris 9/10/11, Ubuntu 10.04

Virtualization: VMware ESX server, VMware Workstation, VirtualBox, OVM Server

Storage: VERITAS Volume manager, Logical Volume Manager, Tivoli (TSM), VERITAS NetBackup, EMC Power Path, EMC Symmetrix, Hitachi, IBM arrays, Storage-TEK L700

Cluster: HACMP, Veritas Cluster Server (VCS), RHCS

Network Services: SMTP, SNMP, SSL, DHCP, POP, HTTP, SMB, NIS, NIS+, NFS, SFTP, DNS, FTP/TFTP, LDAP, JDBC, ARP/RARP, SSH, TCP/IP, WEBSM, NAT, NTP, TELNET.

Servers: HP ProLiant Gen8/Gen9, HP BladeSystem c3000, HP BladeSystem c7000, Dell PowerEdge T320 Tower server, Dell PowerEdge R320 Rack server, Dell R810, Dell R815, Dell R910

Databases: Oracle 11g, Oracle 12c

Programming languages: C, C++, java, JavaScript, HTML programming.

Scripting: Bash, Korn, KSH, CSH, Perl Scripting, Python, Ruby, PHP, Shell Scripting on Red Hat Linux.

PROFESSIONAL EXPERIENCE

Confidential

Subject Matter Expert

Responsibilities:

• Performed AIX to RHEL migrations
• Installed OVM Server, OVM Manager, configured server pools, NFS share and iSCSI for OVM Servers
• Worked as a team on implementation of Vmware Vrealize infrastructure to automate the RHEL builds
• Installed and updated ESX hosts
• Engineered Oracle real application cluster and worked closely with DB team
• Deployed the major components of the puppet infrastructure like puppet server, facter, hiera, MCollective and puppetDB
• Wrote various puppet modules to add users to hundreds of servers, add new logical volumes and increase the size of the filesystem
• Provided support for 600+ production RHEL servers, patched and upgraded Red Hat Enterprise Servers, both physical and virtual
• Setup Virtual Test Environment using VMware ESXi on Cisco UCS blades
• Implemented PXE boot and kickstart
• Successfully setup and managed oracle dataguard on Exadata utilizing multiple networks
• Created physical clusters for critical applications using Red Hat Cluster Suite
• Hands on experience with server management related to changes, incidents, problems, upgrade, and release
• Worked with Oracle 10g, 11g in creating database and logical domain after partitions
• Proven ability to automate server builds using kickstart, management and configuration of system services using Puppet
• Configured different systems such as ext4, ext3, Oracle ASM (RAC), GFS2
• Provided remote support for Linux servers and maintaining SLAs, Performance tuning and enhancing
• Migrated Physical Volumes from VMAX to VMAX3
• Troubleshot network issues using ubiquitous tools like ping, netstat, iperf, tracepath and traceroute
• Updated ILO, HP’s remote console access software, using HP smart update manager
• Configured different RAID level by using HP Smart Array Controller
• Configured multipath, added SAN LUNs, created PVs, VGs and LVs
• Resized the file systems using resize2fs utility
• Designed firewall rules for new servers to enable communication within applications
• Configured NFS server which acted as a central software repository
• Fine-tuned kernel parameters as per the specifications provided by oracle
• Patched RHEL servers using yum utility

Confidential

Linux Administrator

Responsibilities:

• Installed, maintained, administered and troubleshot Linux, AIX systems and VMware ESX hosts
• Performed automated installations of Operating System using kickstart for Linux
• Extensively worked on Logical Volume Management and disk space allocation per user (Quotas)
• Configured DNS, NFS, NIS, NIS+, SAMBA, LDAP, SSH, SSL, SFTP, SMTP, SNMP using TCP/IP protocols
• Dealt with installation of packages, patches, maintenance and RPM updates on Red Hat Enterprise Linux
• Worked with configuration management tool Chef and gained good understanding on Puppet
• Wrote and tested chef recipes, cookbooks and automated the deployment processes
• Experience in SUSE NFS Clustering, configuration and File System maintenance
• Expert in Upgrades, installs, configuration and administration security and monitoring tools on Linux
• Managed Amazon Web Services (AWS) infrastructure with automation and configuration management tools such as Puppet, or custom-built designing cloud-hosted solutions, specific AWS product suite experience
• Installed, configured and managed Puppet Master and Agent. Wrote custom Modules and Manifests, downloaded pre-written modules from puppet-forge
• Upgraded or migrated Puppet Community and Enterprise
• Deployed and monitored scalable infrastructure on Amazon web services (AWS) & configuration management using puppet
• Worked with Puppet Enterprise tool for patch updates and stopping and starting various services and daemon’s
• Setup NFS file systems and shared them to clients
• Troubleshot network, application, and server related issues
• Created RPM packages using RPMBUILD, verifying the new build packages and distributing the package
• Dealt with user id deletion with removing entries from CRONTAB
• Configured network connections (NIB) and IP network adapters in AIX
• OS mirror to hard drives in AIX with using commands such as mirrorvg
• Completed alternate boot update
• Extensive experience in the concept of LVM, User & System Resource Management and Job Scheduling
• Responsible for patching and upgrading RHEL servers from 5.x to 5.11 and 6.x to 6.5
• RPM and YUM package installations, patch and other server management
• Experience in Shell scripting (bash, ksh) to automate system administration jobs
• Performed common system administration task including adding users, creating file systems, configuring volumes weekly mksysb

Confidential

Linux Administrator

Responsibilities:

• Developed long term Linux strategies to meet the enterprise requirements
• Patched RHEL servers using yum utility
• Created RAID partition using HP smart array controller
• Installed and configured various infrastructure services such as DNS, DHCP, NFS, SMTP, Apache Server, NIS, Samba, SSH, Telnet, sendmail
• Managed and resolved system monitoring alerts
• Reviewed system health by using utilities like uptime, netstat, top, free, multipath, vmstat, iostat and dmesg
• Troubleshot and resolved system performance and networking issue by using utility like iostat and iperf
• Managed user accounts by enabling netgroup on the RHEL servers
• Used NetApp servers to mount NFS shares on RHEL
• Used Nagios and Splunk to automate monitoring and alert setup
• Performed partition of volume for Oracle ASM
• Provided remote support for Linux and AIX servers while maintaining SLAs
• Engineered the client’s requirements and recommended appropriate design for Infrastructure implementation