SUMMARY:

• 5+ years of hands - on experience in systems design, build, configuration, deployment, performance tuning, troubleshooting and administration of Linux servers.
• Very confident with Apache, NFS, SSH, FTP, parted, fdisk and LVM on Linux.
• Great understanding of IT infrastructure network concepts and protocols
• Well organized with strong problem solving and effective communication skills as well as ability to work both in teams and independently

TECHNICAL SKILLS AND APPLICATIONS:

• Red Hat Linux, CentOS, Suse Linux
• Active Directory
• DFS Management
• Remedy ticketing system and Nagios
• Web Server: Apache
• File System
• VAS Authentication
• Quest Tools
• Virtualization: VMware vSphere
• DNS
• SEPM (Symantec Endpoint Protection Management)
• Knowledge of Jenkins and Git

EXPERIENCE:

Linux Systems Administrator

Confidential, West Virginia

Responsibilities:

• Plan, build and manage virtual Linux machines on VMWare vSphere and physical machines on Dell PowerEdge R10
• Perform various service configurations on Linux servers to include: NFS, SSH, SNMP, FTP, Apache and custom services
• Work closely with software developers as needed to troubleshoot and resolve issues
• Cloning and snapshots of servers and upgrade to the latest version
• Unix enable Users and Groups in Active Directory using Quest and VAS tools
• Swapping in and out of servers as required
• Create and manage mount points for application software
• Creation and management of approved OS user and groups
• Manage filesystems space utilization using script scheduled as cron job
• Maintain user-based security via password aging
• Maintain file system and host security using chmod, chown, chgrp, immutable bit, Iptables and TCP wrappers
• Turn-off unused services on systems to strengthen host security
• Disabled direct ssh root login on servers
• Configure, troubleshoot and manage TCP/IP networking on RHEL systems
• Perform software package installation, upgrades and updates using yum, yast, zypper and rpm commands
• Apply system patches and updates
• Manage filesystems using fdisk and LVM
• Installation and configuration of SNMP on servers
• Resizing mount partitions size
• Configure NFS server and mount exported NFS resources at the client side
• Giving users access to drive folders using DFS and Active Directory
• Adding and reclaiming of resources as need arise
• Backup of Virtual machines, data and files using CommVault
• Change root password on all server from centralized puppet master server
• Update /etc/issue file for system notifications and warnings on user logins
• Apply patches to both Windows and Linux clients computers using IBM BigFix
• Setup secured passwordless user ssh authentication on servers using ssh keys
• Monitored and controlled system processes using top, renice, kill etc
• Conducted system performance tuning and capacity planning
• Tune Linux kernel parameters as requested by database administrator
• Monitored system logs and activity on all servers to detect and resolve issues
• Configure NTP client on servers to synchronize time zone with the NTP server
• Resolved systems issues reported by Nagios
• Responded to and closed out Remedy tickets
• Documented server baselines and procedures
• Update virus definitions out of date on SEP manager
• Set up servers to tap and mount storage from NetApp SAN
• Sends weekly report to management on overall system performance and health checks

Unix Admin

Confidential, Reston, VA

Responsibilities:

• Installing and configuring all the Linux servers in the network per specifications of clients.
• Installed and Administered patches and updates
• Installed packages on servers.
• Configured and managed Server networking.
• Troubleshoot and resolved TCP/IP networking issues.
• Performed user accounts and group policy administration.
• Managed Password aging configuration on servers
• Configured and mounted NFS resources.
• Maintained file systems and host security.
• Mapping shared folders to NFS client
• Disabled direct SSH root login on servers.
• Performed security hardening on dedicated servers by turning off unused services
• Setup SSH keys for secured key-based authentication
• Monitored and controlled system processes.
• Participated in afterhours upgrades, troubleshooting, and on-call availability as needed
• Monitored and Managed Server performance using associated tools.
• Performed logs administration to detect and resolve system errors
• Managed systems storages using LVM
• Customize user shell environment using shell initialization files
• Configured Apache HTTP and Apache Tomcat Servers
• Configure NTP client on servers to synchronize time zone with the NTP server
• Configured Server for Oracle Database and Apache Tomcat
• Configure DNS client on servers
• Managed Active Directory Users and Groups
• Taking Snapshot of servers
• Utilized cron to schedule and run jobs
• Hardening and softening of Linux Servers
• Identified bottlenecks and log analysis
• Decommissioning of servers as need as need arise
• Offered other needed OS supports to software developers
• Responded to and closed out Remedy tickets
• Developed functional and technical documentation
• Work as part of a team and provide 7x24 support when required