SUMMARY

• Over 5 years of IT experience, including 5years as Linux Systems Administrator in enterprise development, and production environments
• Proficient in Red Hat Enterprise Linux (RHEL) Systems Administration
• Hands - on experience in RHEL systems installation, configuration and maintenance
• Hands-on experience in managing physical and virtual RHEL machines (on VMWare ESXi)
• Using Puppet and Git to define and automatically enforce desirable state of I.T infrastructure
• Competent in package management - installations, updates and upgrades
• Proficient in User account administration and authentication
• Competent in RHEL networking configuration and troubleshooting
• Experienced in Log Administration for troubleshooting and resolving system issues
• Experienced in maintaining RHEL user-based and host-based security
• Hands-on experience on installing and configuring NFS server, Apache HTTP server, SSH
• Excellent knowledge of platform performance tuning
• Hands-on experience on file systems management, backup and recovery
• Excellent knowledge of Linux memory and storage structures
• Experience supporting software developers and database administrators in large enterprise environment
• A self-motivated, responsible and reliable team player with a set of strong technical skills
• Excellent organizational and documentation skills
• Strong verbal and written communication skills
• Very resourceful and trainable
• Results-driven IT personnel with an established reputation for effectively working with diverse groups of people and adaptability to changing environments.

TECHNICAL SKILLS

• Red Hat Enterprise Linux 6
• TCP/IP Networking
• NFS
• FTP
• SSH
• DNS client
• Apache HTTP Server
• NTP
• LVM iptables firewall cron
• VMware ESXi
• Nagios
• Red Hat Satellite server
• Putty
• SSH Client
• WinSCP
• Secrete Server password manager
• BMC Remedy
• MS outlook
• MS Office
• HP Proliant DL 380 Servers
• Dell PowerEdge servers

PROFESSIONAL EXPERIENCE

Confidential - Lanham MD

Linux Systems Administrator

Responsibilities:

• Planning, installation, configuration, management and troubleshooting of Red Hat Enterprise Linux 5,6,7 Linux/zlinux platform
• Using Puppet and Git to define and automatically enforce desirable state of I.T infrastructure
• Install and manage virtual Linux machines on VMWare ESXi
• IBM websphere application and integration middleware on rhel servers.
• Work closely with software developers as needed to troubleshoot and resolve production outage
• Create mount points for database administrators for Oracle database install
• Creation and management of approved user accounts and groups
• Manage filesystems utilization using script scheduled as cron job
• Maintain user-based security via password aging
• Turn-off unused services on systems to strengthen host security
• Disabled direct ssh root login on servers
• Configure and manage TCP/IP networking on RHEL systems
• Troubleshoot and resolved networking issues
• Perform software package installation, upgrades and updates using yum and rpm commands
• Manage filesystems using fdisk and LVM
• Perform critical system administration tasks from Single user mode
• Create directory symbolic links for users as requested
• Install and configure Apache httpd server to be used by developer to host web applications
• Configured multiple websites on one Apache http server using virtual Host containers
• Configure NFS server and mount exported nfs resources at the client side
• Configured and managed vsftp servers
• Setup secured passwordless ssh authentication on servers using ssh keys
• Schedule and maintain cron jobs
• Monitored and controlled system processes using top, renice, kill etc
• Conducted system performance tuning and capacity planning
• Configured Kernel Parameters for Oracle database install
• Performed system logs administration to detect and resolve issues
• Monitored system logs and activity on all servers
• Configure NTP client on servers to synchronize time zone with the NTP server
• Resolved systems and process issues reported by Nagios
• Responded to and closed out Remedy tickets
• Documented server baseline and procedures
• Performed file system backups and restores using local archiving utilities to include tar, gzip
• Sends weekly report to management on overall system performance and health checks
• Took turns for 24/7 production support

Confidential - Annapolis, Md

Linux/Unix Systems Administrator

Responsibilities:

• Installed RHEL 5&6 on linux/Zlinux servers and set up volumes
• Installed packages on servers.
• Configured and managed Server networking.
• Troubleshoot and resolved TCP/IP networking issues.
• Performed user accounts administration.
• Managed Password aging configuration on servers
• Configured and mounted NFS resources.
• Maintained file systems and host security.
• 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.
• Monitored and Managed Server performance using associated tools.
• Resolved systems and processes issues reported by Nagios
• Performed logs administration to detect and resolve system errors
• Managed systems storages using LVM
• Customize user shell environment using shell initialization files
• Configure DNS client on servers
• Utilized cron to schedule and run jobs
• Offered various 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