Jan 2012 – Jan 2016 · 4 yrs · Noida Area, India

• Unix Administrator for managing, administering, configuring and troubleshooting of 2300 Unix Servers ( Redhat Linux and Solaris OS). Providing L3 support and part of a Project Team .
• Role and Responsibilities:
• > Core member of the UNIX L3 Support team and providing support to highly critical and escalated issues of customer. Being a POC for Linux related issues providing 24/7 on call availability by means of cell phone, instant messaging and email.
• > Being member of Project Team, I am responsible for provisioning of the new servers both physical and virtual as per the project requirements. The build is duly performed by using kickstart and Vmware template. Also, the focal point for re-provisioning of OS (upgrades).
• >Worked with Storage team on EMC/NetApps products to allocate disks to Linux/Solaris Servers.
• >Management of user tickets related to service restart, expansion of file system, creation of accounts, providing restrictive admin level access , configuring printer, adding virtual IP's, channel bonding,network teaming, changing Kernel parameters as per application need, setting up the environment for Oracle DB and Sap installation,re-scanning & adding new storage and various Server issues.
• >Perform error analysis and recovery and responsible for creating documentation and procedures required for reference
• >Design cluster topology in production environment for 4 nodes Redhat Cluster for high availability of GFS2 file systems.
• > Co-ordination with other teams like Database team, Network team, Storage Team, Application team and other support teams as applicable.
• >Involved in quarterly patching , applying bug fixes , upgrading firmware for both Solaris and Linux environment.
• >User/Group Account Management through Sudo and LDAP server.
• >Creating and extending large file systems for DBs and different applications using Vxvm, LVM and ZFS.
• >Configuring and Administrating of File Server (NFS, FTP, and SAMBA).

Jan 2011 – Jan 2012 · 1 yr · Noida Area, India

• Worked as a Linux Administrator (L2 plus support) for IBM Clients on behalf of DCM DataSystems.
• Role and Responsibilities:
• Handled Production servers hosted on HP Proliant Series, Blade System and IBM Blade-center series hardware platforms with Redhat Enterprise Linux 4/5 Operating system.
• Installed, configured and setup of Redhat Enterprise Linux v4 & 5 as per client requirements. Also, successfully installed and configured Operating System over SAN environment.
• Management of LVM including creation, expansion and shrinking of file systems.
• Configured Powerpath utility on Linux servers for load-balancing, fault-tolerance and multipathing.
• Performed regular Patching on production and non-production Linux server’s having critical Oracle Rac cluster applications hosted on them.
• Performed HBA firmware and boot code up-gradation on HP BL680c
• G5 series server.
• Installation, configuration, maintenance and monitoring of various type of linux server ( Mail, Proxy, DHCP, DNS, NFS, Firewall etc).
• Identified root cause and provided solutions to OS and application related issues.
• Handled change management and problem management tickets.
• Work with customers on incidents with complete process adherence and SLA. Provide RCA for incidents.
• User & Group Administration: User creation, deletion, modification, tuning of various account parameters, password reset, configuring account/password ageing policies etc. as per request received from various application teams.
• Package Installation: Install various packages as per requests received from the application teams through rpm.

Mar 2010 – Jan 2011 · 10 mos · Gurgaon, India

• Installation, configuration and troubleshooting of Centos 4 and Centos 5.2 operating Systems. Handled all queries of users related to OS, mail client and network.
• 24/7 Production Support of all servers running under Centos O/S.
• Provided Level 1 and 2 support, performing required actions depending on the priority of problems, following the escalations procedure in time-bound situations.
• Handling load balancer tool F5 for traffic distribution, doing CC on live servers and rectifying problems of server.
• Installation and updation of Mysql 4.1 to Mysql 5.0, backup and restore of Mysql databases using Mysqldump.
• Performed website sanity using test case manager tool and filing and updating bugs using Bugzilla.
• Server Health check-up like load average, cpu utilization, disk usage.
• Responsible for identify root cause of problem from server logs.

Nov 2008 – Mar 2010 · 1 yr 4 mos · New Delhi Area, India

• Administering the in-house LAN, which has RedHat Linux and Windows XP, 2003 servers & skill level in Shell Scripting( bash/korn/sed).
• Management and administration of Postfix Mail Server along with Fetchmail, creation of user’s accounts, mail forwarding, monitoring & rotating Logs files, message queue related problems.
• Managed Ftp Server used for taking backup of user system’s with the help of Handy backup tool, managing and creating user profiles.
• Configured Samba Server for 70 users, making samba user’s accounts, security by implementing strict policies, creation of groups for similar purpose of use, providing access.
• Responsible for managing network components like Switch, Hub, and troubleshooting connectivity issues of the network.
• Installation, configurations and management of Accounting Software Tally 9 Gold on Windows Server 2003. Migration of Data from Tally 5.4 to Tally 9, Spiliting Large companies.
• Performed regular backup of tally data using Hp Data Protector Express tool on Hp DDS 4 Tape Drive.
• Installation of all types of software and hardware and trouble
• shooting of PCs
• Desktop related issues like connectivity and performance.