SUMMARY

• Seeking a position as a UNIX system administrator where me can use my technical, educational and professional skills in achieving the overall organizational goal.
• Over 6 years of IT experience, including Linux Systems Administrator in enterprise development, Staging,QA 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)
• Competent in package management - installations, updates and upgrades
• Proficient in User account administration and autantication
• 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, Apache 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

• RedHat Enterprise Linux 5 & 6
• Sun Solaris 8/9/10
• TCP/IP Networking
• User Account Administration
• Network Filesystem
• DNS
• SSH
• Solaris Zones and Containers
• VMware ESI
• Logical Volume Manager
• VXVM
• Veritas Netbackup
• Apache web server
• Apache Tomcat
• BMC Remedye
• Dell PowerEdge
• IBM Blades
• Sitescope
• Spacewalk
• RHNSAT
• Centrify
• NAC
• Linux sparc

PROFESSIONAL EXPERIENCE

Confidential, ROCKVILLE MD

Linux/Unix System Administrator

Responsibilities:

• Planning, installation, configuration, management and troubleshooting of Red Hat Enterprise Linux platform
• Install and manage virtual Linux machines on VMWare ESXi
• 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
• Wrote Bash Shell script to track filesystem space usage
• 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 strengtan 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
• Apply system patches and updates
• 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 virtualHost containers
• Install and configure Apache tomcat server for developers
• Configure NFS server and mount exported nfs resources at the client side
• Configured and managed vsftp servers
• Utilized f5 Big IP load balancer web interface to control traffic on web servers during system maintenance
• Change root password on all server from centralized puppet master server
• Manage user access to svn repositories
• Manage RHEL servers from RHEL satellite server web interface
• Register all servers with the Satellite server using bootstrap script
• Update /etc/issue file for system notifications and warnings on user logins
• Setup secured passwordless ssh autantication 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
• Tune Linux kernel using kernel parameters as requested by database administrator
• 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 Site scope
• Responded to and closed out Remedy tickets
• Documented server baseline and procedures
• Set up servers to tap and mount storage from SAN Array
• 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
• Deploy, Configure and maintaining file systems
• Adding hosts to deployment manager
• Remove hosts from deployment manager
• Running scripts with deployment manager
• Adding users to Centrify
• Adding machine to a domain
• Granting users access to servers
• Retiring servers
• Managing jira and EW ticketing systems
• Registration of servers to DNS
• Setting firewall rule on servers
• Building Linux desktop
• Patching Linux servers for maintenance
• Managing RHNSAT and SPACEWALK Servers
• Backing up Satellite and Spacewalk database
• Registered servers into RHNSAT and Spacewalk
• Network Configuration and Troubleshootion
• Creating computer object in AD
• Renaming and disabled users home folder
• Deleting regular users Novell account
• Implementing ACL on servers
• Installing and managing software
• Cloning virtual machine
• Taking a snapshot of the virtual machine
• Adding CUP and Memory to the virtual servers
• Updating VMware tools
• Managing systems resources
• Setting up Apache web servers
• Managing Apache web servers
• Tune and maintain the kernel
• Create a bonded interfaces
• Configured servers to communicate with host attached array
• Configured virtual host container for client web sites
• Configured server networking on RHEL 5 & 6
• Troubleshooted and resolved TCP/IP issues
• Implemented file system and host security
• Configured Server as a dedicated host
• Document server build page

Confidential, Silver Spring, MD

UNIX Systems administrator

Responsibilities:

• Installed Sun Solaris 9&10 Sparc servers
• Installed RedHat Enterprise Linux 5 & 6
• Administered patches on all servers
• Installed rpm packages on RHEL 5 & 6 servers
• Installed solaris 9 Recommended patch cluster
• Create Solaris zone
• Performed UNIX disk administration
• Performed content management on web server
• Create and configured file systems
• Deploy, Configure and maintaining file systems
• Adding hosts to deployment manager
• Remove hosts from deployment manager
• Running scripts with deployment manager
• Adding users to Centrify
• Adding machine to a domain
• Granting users access to servers servers retirement
• Managing jira and EW ticketing systems
• Registration of servers to DNS server
• Setting firewall rule on servers
• Building Linux desktop
• Patching Linux servers for maintenance
• Managing RHNSAT and SPACEWALK Servers
• Backing up data base in Satellite and Spacewalk
• Update the RHNSAT package repository
• Registered servers into RHNSAT and Spacewalk
• Managing RedHat channels
• Remotely update packages
• Network Configuration and Troubleshooting
• Creating computer object in AD
• Deleting administrative account
• Renaming and disabled users home folder
• Deleting regular users from Novell account
• Controlled boot process
• Resolving boot issue
• Implementing ACL on servers
• Installing and managing software
• Cloning virtual machine
• Taking a snapshot of the virtual machine
• Adding CUP and Memory to the virtual servers
• Updating VMware servers
• Monitoring VMware tools status
• Managing virtual servers
• Managing systems resources
• Setting up Apache web servers
• Managing Apache web servers
• Tune and maintain the kernel
• Create a bonded interfaces
• Configured virtual host container for client web sites
• Configured server networking on RHEL 5 & 6
• Troubleshooted and resolved TCP/IP issues
• Performed user account administration
• Implemented file system and host security
• Configured Server as a dedicated host
• Set up secured SSH communication between servers using TCP wrapper
• Disabled direct SSH root login on all servers
• Monitored and controlled system processes
• Monitored Server performance using associated tools
• Performed logs administration to detect system errors
• Recover deleted files
• Replaced failed drives on servers
• Configured NFS resources on RHEL 5 & 6
• Wrote script to track swap space
• Managed system disk using VERITAS Volume Manager
• Set up hot spares using VERITAS Volume Manager
• Implemented RAID 1&5 using VERITAS Volume Manager
• Set up disk groups and data volumes using VERITAS Volume Manager
• Mirrored boot drives using VERITAS Volume Manager
• Set up file systems on VERITAS data volumes
• Configured, Installed and booted Solaris Zones
• Responded to and closed out Remedy tickets
• Took turns for 24/7 week end production support
• Wrote documents on server procedures

Confidential, Arlington VA

Linux system administrator

Responsibilities:

• Managed boot disk and data drives using VERITAS Volume Manager
• Managed disk drives with logical volume manager in RHEL 5 & 6
• Administered Apache web server
• Performed content management on web servers
• Worked with the SAN
• Imported LUNs from SAN onto servers
• Supported Oracle Database
• Set up server for Oracle install
• Created Oracle mount points ON Solaris servers
• Did logs administration to detect system errors
• Liaised with Sun Support on hardware issues where necessary
• Installed Solaris 9 and 10 on Sun Servers
• Installed RedHat Linux on servers and configured volumes
• Managed user accounts for developers
• Administered patches on servers RHEL 5 & 6
• Configured file system and host security
• Configured server networking
• Troubleshooted and resolved TCP/IP issues
• Configured NFS resources
• Monitored server performance using associated tools
• Managing jira and EW ticketing systems
• Registration of DNS
• Setting firewall rule on servers
• Setting up YUM repository
• Removed local repos
• Building Linux desktop
• Patching Linux servers for maintenance
• Managing RHNSAT and SPACEWALK Servers
• Backing up data base in Satellite and Spacewalk
• Update the RHNSAT package repository
• Registered servers into RHNSAT and Spacewalk
• Managing RedHat channels
• Disable Empty passwords
• Turned off IPv6 both Solaris and Linux plat form
• Create a bonded interfaces
• Implemented firewall on servers
• Disable unwanted services
• Configured servers to communicate with host attached array
• Performed Capacity planning
• Performed file system backups and restorations using local archiving utilities to include tar, zip, ufsdump and ufsrestore