Experience

• 

  Fastenal India

  • Bengaluru Area, India

  • Sr. Systems Administrator

    • Mar 2016 - Present
    • Bengaluru Area, India

• 

  Collabera Technologies Pvt Ltd

  • Bengaluru Area, India

  • Unix Lead Administrator

    • Jan 2014 - Mar 2016
    • Bengaluru Area, India

    Working at Client Monsanto office as senior Unix Administrator. I am part of Unix team responsible for supporting Unix infrastructure of about 1500 deployed servers of various Linux flavours (Redhat and Suse) which includes physical and virtual servers.Job Responsibilities:• Install, Administer and Maintain various VMware and Dell Servers running Red Hat Enterprise Linux 3/4/5/6 and Suse 10/11 OS.• Worked on taking snapshots and clones of virtual servers.• Worked on modifying limits.conf file to set open file and process limits.• Worked on modifying kernel parameters without rebooting the server.• Worked on firmware upgrade on Dell servers using Dell SUU.• Performed OS upgrade on Dell servers running RHEL and SUSE Linux OS. • Worked on saving disk space by configuring automated logrotate of log files.• Patching on Redhat servers with Up2date and Yum utility.• Patching on SUSE servers with Zypper utility.• Creating and Managing User and Group and Access Privilege Setting with sudoers on Red Hat Linux and SUSE Linux.• Hard Disk lun addition on physical servers connected with storage, virtual disk/Direct lun mapping on virtual servers with RHEL and SUSE Linux OS.• Adding CPUs, Memory and Network cards on VMware virtual Linux servers.• Worked on recoring the Linux servers from SUSE to RHEL.• LVM Hard Disk Partition, Resize, Reduce, Mirror, Snapshot in Red Hat Linux and SUSE Linux servers. • Troubleshooting Dell Servers for Booting, Network, Hardware and OS Level Issues by coordinating with vendor support.• Monitored the performance of the servers using ps, top, sar, vmstat, netstat, iostat, and mpstat to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.• Wrote Shell scripts to automate daily UNIX related tasks and as part of project activities.• Responsible for Primary on-call during week days and weekends on rotational basis. • Accountable for Remedy Work Orders, Incident Tickets and Change Requests.

• 

  LSI Corporation

  • Bangalore, India

  • Sr Unix Administrator

    • Oct 2005 - Dec 2013
    • Bangalore, India

    • Responsible for Installation, Administration and Maintenance various Sun, Dell, IBM and HP Servers running Solaris 8/9/10 and Red Hat Enterprise Linux 3/4/5/6.• Install and setup of VMware Workstation 7/9. Installing RHEL 5/6 and CentOS 5.9 on VMware Workstation 7/9. • Responsible for UNIX user account and group creation and termination following standard procedures.• Troubleshooting Sun, Dell, IBM and HP Servers for Booting, Network, Hardware and OS Level Issues. Worked on Troubleshooting tickets i.e. Hardware Failure, Rebooting server, Replacing System Boards by coordinating with vendor support.• Monitoring the performance of the system using ps, prstat, top, sar, vmstat, netstat, iostat and rpcinfo to check the CPU utilization, bottlenecks of I/O devices, Memory usage and Network traffic.• Monitoring UNIX servers’ performance using Nagios monitoring tool.• Writing Shell and Perl scripts to automate day to day UNIX related tasks.• Responsible for Primary on-call activities and accountable for Work Request, Trouble Ticket and Change management activities.• Responsible for rack mounting the servers, network cable patching, connecting power after coordinating with facilities team.• Responsible for configuring hardware RAID on servers during server setup. Inventory setup of servers using scripts.• Installation of Solaris 8/9/10 using Jumpstart and RedHat Linux 3/4/5/6 using Kickstart.• Experience with OS Upgrades and installation of Third Party Software, packages and patches. Configured Cron Jobs. Scheduling Jobs using CRONTAB and AT Utility.• Worked on providing access permisisons for user based on Remedy request after approval from appropriate group/disk space owner as per process.• Open change control tickets for infrastructure change, decommission of servers, Installation of infrastructure and LSF compute servers.• Worked on creating UNIX Samba Shares, providing Samba share access permisisons and troubleshooting Samba share access issues.