SUMMARY

• Technically sophisticated Linux systems administration professional with a reputation for being a skilled troubleshooter and providing exceptional and dedicated service to end users.
• Over seven years of progressive experience working in open source environments such as Red Hat Linux and CentOS.
• Skilled in monitoring and identifying network related issues in Linux and Unix environments.
• Significant experience in Red Hat Linux including installing and configuring servers manually and with Kickstart, upgrading and patching Red Hat Linux servers using Red Hat satellite servers, and working with database administrators to prepare the Linux kernel for oracle installations.
• Ability to communicate with non - technical users to provide support, training, and service that is easily understood and builds strong relationships between technology and the business.
• Constantly strives for total client satisfaction.
• Experience in maintaining Linux production servers for guaranteed availability and stability.
• Strong analytical and time management skills.

TECHNICAL SKILLS

Protocols: DNS, NFS, NTP, FTP, LFTP,SFTP,TELNET,SSH

Operating Systems: RHEL 5.x/6.x/7.x and CentOS 5.x/6.x/7.x

Hardware: HP ProLiant Servers, Dell Servers, R710, R720, R810, R8210, R910

PROFESSIONAL EXPERIENCE

Confidential, Baltimore, Maryland

Linux /Unix System Administrator

Responsibilities:

• Build, install and configure Linux servers using kick start installation method.
• Install and configure Spectrum Scale (GPFS) clusters and file systems and set all the parameters for better cluster performance.
• Install and configure third party applications like tripwire, Connect Direct, etc
• Apply Linux security and OS patches and resolve all post patching issues.
• Work with Oracle Team to install oracle client 12c on Linux servers.
• Create service and administrator accounts on Linux and Solaris servers and assign them to groups.
• Set cron jobs and grant or restrict cron access to users.
• Patch SAS GPFS clustered environments and troubleshoot and fix all problems that may come up after patching.
• Lock and unlock user accounts.
• Set password aging parameters on service and administrators accounts.
• Troubleshoot all user authentication issues and resolve them.
• Configure and partition storage on zLinux servers for oracle ASM.
• Add and configure DASD devices on Red Hat Linux 5,6 and 7.
• Update tnsnames for the Oracle Team.
• Sets ulimits on Linux servers for applications and other users.
• Partition disks, create volume groups and logical volumes.
• Create files systems and troubleshoot and resolve all file system issues including disk input/output errors.
• Extend volume groups and logical volumes.
• Apply firmware and driver upgrade on HP ProLiant physical servers
• Monitor disk usage and move files across servers in different datacenters.
• Configure NFS servers and clients. Set up automounts using autofs on NFS clients.
• Tune Linux operating systems for better system and application performance.
• Grant access to users of files and directories.
• Write process procedures for tasks that are performed in our environment.
• Ticket system -Remedy and Service Now.
• Troubleshoot and fix network related issues.
• 24/7 rotating on-call support.

Confidential, Exton, Pennsylvania

Linux System Administrator

Responsibilities:

• Installed and configured Linux servers on physical machines.
• Installed and configured PowerBroker Identity Service (PBIS) on all new servers and joined them to their respective domains.
• Responsible for storage management - logical volume manager (lvm), RAM and swap.
• Installed, configured and maintained IBM ILMT server for licensing and billing.
• Troubleshooting Linux network related issues and resolving them.
• Responsible for monitoring backup and restore using HP Data Protector.
• Import and export of tapes into the Spectra Cell Manager.
• Disable all unnecessary services running on our Linux servers
• Tune the Linux kernel for oracle installations.
• Manage local and domain user accounts.
• Set servers for CPU and disk monitoring by SiteScope.
• Installed and configured IBM siteminder agent on Linux servers.
• Troubleshooting day-to-day Linux issues that came up and resolved them in a timely manner.
• Performed other administrative services such as updating server database and password manager.

Confidential, Harrisburg, Pennsylvania

Linux/Unix Systems Administrator

Responsibilities:

• Create virtual machines using VMware Vsphere client 4.x and 5.x.
• Install, configure and maintain Red Hat Linux 5.x/6.x/7.X and CentOS servers using kickstart and interactive installations procedures.
• Manage user and group accounts, grant access to users and lock user accounts.
• Manage Red Hat Linux servers with Red Hat Satellite Server.
• Install firmware upgrades, kernel patches, system configuration, and performance tunining on Red Hat Linux servers.
• Create disk partitions; make file systems as well as creating LVMs.
• Ensure resource optimization regarding memory CPU and disks.
• Monitor, troubleshoot and resolve CPU, disk and memory issues.
• Configure and troubleshoot DNS and well as NFS and FTP related issues.
• Manage system routine backups, scheduling jobs, enabling cron jobs, enabling system logging and network logging of server for maintenance.
• Installing and supporting Apache on Linux production servers.
• Experience working with Database administrators to tuning and preparing the Linux kernel for Oracle installations.
• Working with Netbackup administrators to schedule and run full backups of the Linux servers.
• Install and support applications such as munin, puppet as well as other third party-party security and monitoring tools to identify threats and intrusions.
• Experience in performing automated tasks using puppet modules, creating profiles and manifests and deploying them across multiple servers.
• Occasionally present performance reporting to the appropriate body.
• Basic bash scripting experience.
• Provide bi-weekly weekend support for development and production servers.
• Ticketing system, Service now.

Confidential, Jessup, Maryland

Linux System Administrator

Responsibilities:

• Built virtual machines; installed and configured Red Hat Linux on both physical and virtual servers.
• Created and maintained user accounts, password security and complexity, password recovery and password aging.
• Configured SSH password-less logins using ssh-keygen.
• Locked and unlocked user accounts.
• Granted sudo (elevated) privileges to users as required by the company.
• Provided RPM and YUM service installations on Red Hat Linux servers.
• Managed storage and created disk partitions with Logical Volume Manager - LVM.
• Performed full backup of operations to ensure recovery and availability of operations at all times.
• Installed and supported third-party applications for performance, security and monitoring.
• Repaired and recovered software as well as hardware failures
• Administration DHCP, DNS and NFS in Linux.

Confidential, Rockville, Maryland

Linux System Administrator

Responsibilities:

• Responsible for day-to-day administration of Red Hat Linux servers.
• Created user accounts and set up quotas for user accounts and limiting disk space usage.
• Troubleshooting Linux network and related security issues.
• Experience in network configuration and troubleshooting and partitioning file systems.
• Performed routine performance tuning and resource optimization.
• Made backups of important files using the tar, zip, gzip and other compressing utilities.
• Maintained appropriate file and system security monitored and controlled system access.
• Changed permissions and ownership of files and directories, maintained passwords and assigned special permissions.
• Diagnosing and resolving problems associated with DNS, DHCP, NFS and Apache.
• Created Logical Volumes (LVM) on Linux operating systems.
• Installed and upgraded packages using YUM and RPM.
• Provided 24/7 on-call support