SUMMARY:

• Over 5 years IT experience as Linux Systems Administrator with exposure in Red hat Enterprise Linux 5/6 & Windows 2003/2008
• Good Exposure to VMware ESX servers and Virtual Center Administration.
• Very Good experience on Shell Scripting to automate system administration tasks.
• Installation, Configuration and troubleshooting of Red Hat Linux using Kick start.
• Hands on experience on troubleshooting Boot Loaders like GRUB, LILO.
• Disk management, Software Raid and Creating File systems using LVM and VERITAS Volume Manager.
• Package management like Install, remove and update and querying packages using RPM &YUM in Red Hat Linux.
• Kernel up gradation, Compilation, Tuning and configuring kernel parameters to optimize and enhance the Performance.
• Installation and configuration of Veritas Foundation suite in SAN Environment.
• Disk space and File system management using Veritas File System
• Implementation and troubleshooting of network services like NFS, FTP, SAMBA, NTP, Telnet, SSH.
• Experience in installing and configuring DNS, DHCP, NIS, Autofs, Kickstart Service, User Maintenance and Backups.
• Installing and Configuring Apache, Send mail, Servers in Linux Environment.
• Performance analysis using top, sar, vmstat, iostat, netstat,and lsof.
• Expertise in SMIT, LVM, Mirroring, User & System Resource management, Paging Space management, job scheduling.
• Over 4 years of experience in Linux (RHEL/Centos) environment
• Performed day to day tasks in Linux, UNIX and Windows System Administration
• Linux /Unix System Administration Involved: Software installation and configuration, Patch management
• Performed Windows administration task ; Managed Windows 2003/2008 Active Directory
• Implemented Security & Group Policy; Web services administration; Automated Scripts in Shell, VB and Perl
• Strong Experience with Shell scripting including creating bash scripts for System service checks, Disk monitoring, Application monitoring and cron jobs
• Installed and configured Nagios and Zabbix on UNIX and Windows servers
• Migrated more than 20,000 XP desktop machines to GS customized XP Thin Client (NDC)
• Assisted in Disaster Recovery BCP planning and implementation
• Used SoapUI to Test Web functions

SKILL SUMMARY:

• SuSe & Red Hat Linux
• Installation and configuration of SuSe 11.X and all Red Hat OS.
• User/Group Administration
• Disk (LVM/File system) Administration
• Package/ patch management
• Kernel upgrade and tuning
• Linux Rescue
• SAN LUN scanning and Multipath/Powerpath configuration
• Network (NIC) configuration with bonding &Vlan Tagging
• SMTP client (Postfix/Sendmail) configuration
• NFS/Autofs Server and Client configuration
• Samba, FTP, HTTP server configuration
• NIS/NTP Client configuration and troubleshooting
• Backup Agent installation ( EMC Networker & IBM TSM )
• Performance monitoring and generating graph report
• Monitoring Alarm/incident queue and accept/close within SLA as per standard from client
• Implementing Password policy/PAM according to standard guidelines as per client
• Configuration of Hardware RAID on new build and ILO access & firmware upgrade
• Perform server build tasks and follow a promote to production checklist (enable monitoring/ backup client/ OS hardening/vulnerability assessment) to bring under operations
• Configuration of monitoring tools (HPOM/HPSA - automation) Basic OS Health checking & User Administration
• Network configuration and troubleshooting
• Basic idea on Disk Administration ( SVM & LVM)
• Addition of CPU, Memory, Storage and Virtual NIC in guest OS and assigning port group.
• Shell Scripting
• Shell scripting with basic idea on SED & AWK

EMPLOYMENT HISTORY:

Confidential

Linux Admin

Responsibilities:

• Responsible system administration tasks, like Installing Operating System, Operating System patching, software Installation, Operating System upgrades, Hardware upgrades, troubleshooting and problem resolution.
• Racking and Cabling Servers in the Data Center.
• Supporting Red Hat/Centos Linux Development, Quality Assurance and Production Environments.
• Administrating system/network services such as puppet, DNS, SAMBA, YUM repos, sendmail, and NFS.
• Administrating user accounts using NIS.
• Maintaining Domain Names System (DNS) servers.
• Monitoring Systems using Nagios.
• Managing System configurations using Puppet.
• Administrating Disks using Logical Volume Manager (LVM) and Veritas Volume Manager (VxVM).
• Building Linux virtual machines using KVM.
• Performed day to day Linux administration such as user accounts, directory services, file system shares, and permissions etc.
• Setup NFS and Samba File sharing setup on Linux and Windows servers.
• Created status reports, project plans and attend team meetings to coordinate activities.
• Installing and Configuring Veritas Cluster Services in Linux servers for Highly redundant applications.
• Supporting following change management process for production system.
• Patching red hat Linux servers.
• Resolving SELINUX related issues.
• Wrote basic Shell scripts to be used for cron jobs

Confidential

Linux Systems Administrator

Responsibilities:

• Performed installation, configuration, and day - to-day maintenance of numerous servers and workstations. This included working on performance tuning, backup strategy, kick start/ jumpstart, LVM, VERITAS Volume Manager, VERITAS file system, Net Backup, on Linux/Solaris servers.
• Managed Red Hat Enterprise Linux 3 /4 on HP Proliant Servers and Dell Power Edge Servers, Sun Solaris 8/9 servers and Windows 2000/2003 operating system.
• Designed and implemented LAN and WAN for Linux/ Solaris servers.
• Installation of Packages, Configuring and Administrating NIS, DNS, NFS, SAMBA etc.
• Implementing file sharing over network by configuring NFS on servers to share essential resources.
• Managing Cron jobs, batch processing as a part of job scheduling.
• Created BASH scripts for Application monitoring
• Configured Apache, Configured Kick start installation for Linux servers.
• Installation and administration of patches and other software packages (rpm’s).
• Implemented Virtualization with Xen by installing configuring Domain-0 and Domain-U’.
• Installed virt-manager, a Graphical tool on Red hat servers for creating& managing Domain-U’s.
• Configured FTP, Telnet, SFTP, SSH.
• Configured JAVA/J2EE environment on Unix Machines Configured MySQL, Oracle databases to deploy JSPs, Servlets.
• Installation and configuration of Apache Tomcat web servers.
• Installed Open Source Zabbix Monitoring to replace HP Open View to reduce costs and monitor 1000+ servers
• Enabled quota for the users, Logical Volume Manager, Extending Volumes, RAID configuration.
• Installed and configured VERITAS Netback up 4.5 on Red Hat machine and configured.
• Maintaining virtualization servers through VMware Virtual center 1.2 and 2.0.
• Maintaining Patches and Packages to keep the servers up to date with latest OS versions
• Extensive use of VERITAS Volume Manager for Disk management, file system management.
• Installation, Configuration and Maintenance of Web Servers, Application Servers and Database Servers on Red Hat Linux/ Sun Solaris Servers.
• Installed Oracle&MySQL database packages on Linux/Solaris servers as per DBA requirements.

Environment: RHEL 6

Confidential

Linux Systems Administrator

Responsibilities:

• To build new servers and bring them into production
• I was the SPOC for Vulnerability assessment and remediation tasks for Production/non - production servers
• Supporting more than 6000 servers including Linux, AIX, HPUX and Solaris
• Working on monitoring tool alerts, service request and change requests.
• Decommissioning the old Linux/Unix servers