Mohit Tyagi

Experience

• 

  NIIT Limited

  Nov 2010 - Nov 2014

  Web hosting engineer

  Responsibilities include-:• Monitoring and Management (Administration) of Linux Live Servers allowing the load of 30 thousand users every day.• Security upgrades and installation of packages on Live Linux servers. Installation, up gradation & configuration of SSH, apache, ftp server (wu-ftp, vsftp), Disk space management etc. • Installation and configuration of MRTG, Nessus, etc, for monitoring and better reliability.• Installation and configuration of Apache web server & JBoss 4.1 GA, 4.2 EAP and 5.0 GA.• Performing Daily activity on the Oracle Database Server. This involves taking and restoring the backups, optimization of CPU and the memory usage, creating and adding the Data files, table spaces, creating users and schemas, gathering and analyze of stats pack reports, index files analyze and rebuilding, gathering schema statistics for optimization, working on standby logical servers, RAC servers.• Server monitoring using MRTG, OP Manager, Website Pulse and using cron alert scripts.• Administration of 150 (Application, FTP, mail and DB) remote servers using SSH, Remote power switch and Remote Card Switch.• Routine task e.g. Applications Patching, deployment (manually and Automated), Backup, Restore, performance tuning, OS monitoring and script writing to automate tasks.• Performing Nessus security scanning audit of web sites being hosted internal Team Trainings.• Configure and management of FTP Server.• Create interface to manage Jboss Node as application deployment, Node start/stop, and View application log in Real time. Create Interface to execute quires on Oracle/MySQL database users on VM Ware.• Postfix configuration with dovecot.• Managing LVM in Production & Staging Environment• Linux O.S version upgrade and patching on Linux servers • Managing & fixing vulnerabilities, which detected on Network or Host through Nessus Scanner. Show less

• 

  HCL Technologies

  Dec 2014 - Mar 2017

  Senior specialist

  • Monitoring system Health and resource management through EM7, Op-manger and Nagios and taking Necessary action as per requirement.• Complete Linux End to End O.S support.• Linux O.S version upgrade / Patching on Production and staging servers having SUSE / RHEL/ CENTOS as O.S• Managing different Zone files on DNS Servers and creating and Managing the Records Internally and externally (Verisign ) .• Good Understanding of F5 LTM and creating Virtual Servers / Pools in Big IP ( F5 ) load balancer with different algorithm in QA and Production Environment.• LVM Administration and troubleshooting Of Issue related to LVM.• Kick-start server configuration for automation Installation on No of hosts.• Creating NIC bonding for increase in available bandwidth. • Analysis of applications logs, server Logs for errors & restart nodes & troubleshoot the Issue In case Websites / Portals are not available.• Installation of Self Signed and authorized SSL certificates on apache Nodes .• Management of Hard Disk Drives on the server & Disk Partitioning• Installation and configuration of NFS, Samba and FTP , SFTP file Servers for file sharing.• Management of Hard Disk Drives on the server & Disk Partitioning.• Good knowledge of Splunk with user account management over CLI and GUI on all security servers.• Good knowledge of Science Logic EM7 Tool. User & Group management on EM7 & Troubleshoot the device related Issue in EM7 tool • Troubleshooting of Citrix & Remedy related Issues and Citrix User management on AD.• Managing account on AD servers and assigning users required roles.• Bash scripting for automating jobs .• Good knowledge of Change and Problem management and coordinating with vendors , If required . Show less

• 

  Ion trading

  Mar 2017 - now

  Linux System Engineer

  *Installation & Configurations of Red Hat Enterprise Linux, CentOS, and OEL, Maintenance & System Administration.*Build new Virtual machine and physical server IP bonding for load balancing and failover, *Firewall, SELINUX Managing the VMWare ESX and ESXi server 5.5, 6 based on the requirement.*Building and patching VMware ESXi Host running in clusters on version 5, 6 & later. Assigning required storages and snapshot management on ESXi*Installed and configured Linux/Unix and Windows operating systems on VMware server.*Configure, support, and perform routine maintenance of hardware and software for Linux servers*LVM Administration and troubleshooting Of Issues related to LVM.*Monitored System Activities like CPU, Memory, Disk, and Swap space usage to avoid any performance issues.*Performed hardware and software installations, upgrades, and maintenance, patch administration, kernel modification/upgrades, file system management, performance, and security analysis, and network configuration/tuning.*Good experience of Migration of Physical / Virtual Machines from Hyper-V / Standalone -> *VMware or virtual machines *Managing package install/upgrades using YUM and RPM.*Deployed Puppet agent, Puppet Dashboard, and Puppet DB for configuration management to existing infrastructure.*Working on Migrations / Closures of DC *Prepared Windows/Unix security standard preparation document and system check procedures to keep the systems secured & updated*Implementation and troubleshooting of network services like NFS, FTP, NTP, Telnet, SSH.*Creating VM templates as per various business requirements.*Provided customer support, help/troubleshoot users to resolve server, network, and other system-wide problems.*Worked extensively with Network File System (NFS) for storage.*Plan, document, review, and maintain system administration guidelines and policies. Show less