SUMMARY:

• 7+ years of experience as a systems administrator with administering user accounts, performing server subsystem configuration, File.
• Replication, File System Tuning, network management, installation of software, performing backups, configuration management, and general system maintenance.

PROFESSIONAL EXPERIENCE:

Confidential

Linux System Administrator

Responsibilities:

• Worked with the team of Developers and Engineers to install coding repository applications on the server.* Installed Gitlab, (No Magic)
• Teamwork Cloud, Flex Net server, Cassandra, Jira, and Bugzilla on separate VM's assigned.* Backed up Gitlab instance on Linux terminal, allocated separate directory for data backup.* Provided support for RedHat OS registration and make sure it's properly attached to the subscription.* Assist with implementation of software upgrades and patch installation.
• Documented installation, upgrade and maintenance procedure.* Installed, upgrade and maintained VMware virtual machine on HP servers.* Experience working on VMware products, specifically cloud related solutions such as: vSphere, V Center, ESXI, or contending cloud solutions and products.* Created new VMS depending on the new environment.* Also performed routine system maintenance and resolve server - side issues as they arise.* Reviewed error logs and reported errors and seek out solutions.
• Conducted system backups according to company standards using Bacula, NetApp and Veritas.* Also used Tar in Linux to backup manually as required and used Cron Jobs to automate the backup.* Monitored system performance to prevent slowdowns and crashes.* Maintained Bugzilla and Jira to track/close defects.* Also examined daily traffic logs and reports or receive direct reports from end

Confidential

Linux System Administrator

Responsibilities:

• Responsible for complete user management, creating, renewing and deactivating accounts.* Resolving issues with OS installs. Deploying kick start file to accommodate automated installs.* Modification of startup scripts according to client's requirements.* Perform patches and OS upgrades on 200+ servers on a daily basis.* Working with Amazon and mostly Azure for cloud computing.* Worked with Azure platform to create Virtual Machines depending on the environment.* Worked closely with an engineer to create SQL databases Create incidents and CRQ's via Remedy 9.* Upload, resolve and close - out tickets on

  JIRA Production v7.9.2.* Maintain and support IBM AIX, Solaris and Red Hat servers.* Installation and configuration via Ansible in order to manage several workstations and servers.* Partition and permanently mount new hard disks on Red Hat systems.* Utilize ticketing system (Remedy 9) to investigate, track and resolve user reported issues.* Ensure compliance of uptime and performance standards.* Implement scripts to automate network administration tasks and application deployment.* Utilized BMC server automation "Blade Logic" and Red Hat Satellite on QA, Dev& Prod servers.* Proficient in VMWare.

  Installation and monitoring of virtual environments on ESXI Server and VSphere Client.* Develop processes to optimize system performance and protect the company from risk and data loss while performing software installations and upgrades to Linux systems and maintenance.* Improve performance by resolving login related tickets and resetting password frequently.* Provide support for Linux applications while resolving issues with OS install and kickstart failures.* Monitor the availability and health of the infrastructure and applications across multiple data centers using Nagios XI (ping, CPU load, memory usage, disk IO, processes).* Creating and extending files systems using ext3, ext4, UFS, and LVM.* Fixing vulnerabilities by patching hosts on the network to improve network score and to secure the network systems.* Added new features and perform bug fixes on new and existing machines.

Confidential

System Administrator

Responsibilities:

• Building and provisioning ofRHEL servers using automated approach with PXE boot and custom kick start files.* Managing day to day operations on Red Hat Cluster software.* Securing Linux system by updating firewalls and enable only required services.* Working with LVM, extending file system and attaching the storage to VMs.* Setting up NIS domain for central authentication.* Upgrading packages by working on RPM and YUM and do patching wherever it is required.* Managing Configuration Management tool PUPPET.* Working on provisioning of applications.* Extensively managing SCM GitHub.*
• Setting up NFS and Autofs for mounting the resources.* Creating and extending files system such as etx3, ext4, XFS.* Monitoring system performance by using top, iostat.* Installed puppet master to keep in sync configurations on running agents.* Responsible for troubleshooting of network related issues.*
• Resolving CPU, Disk, Load utilization issues.* Creating and updating PVs, VGs, and LVM.* Upgrading packages on Linux by using RPM and YUM and patching it to maintain the productive environment.* Setting up Boot order and responsible for resolving Server fan and Power supply unit issues.* Troubleshooting Puppet related issues.* Performing troubleshooting steps for File system, Network issues.* Responsible for BIOS, Firmware upgrades.* Resolving CPU, Disk, Load utilization issues.

Confidential

System Administrator

Responsibilities:

• Experienced in using puppet for managing the infrastructure, configuration, user management, file system management, monitoring, server provisioning with manifests.* Installation of puppet master and established master - node connectivity.* Hands on experience in troubleshooting on Puppet nodes.* Refectories puppet manifests to reflect best practices. Wrote Puppet modules forInstalling, configuring, and monitoring Linux packages.* Installing and managing applications. Creating the folders structure Creating the NFS/Autofs share Updating the java properties Updating the bash profiles Creating the jboss instances

  Installing the java, oracle, jboss and various other drivers. Installing the jboss data sources Reflects the jboss data sources properties Upgrading the linux kernel.* Managing persistent SSH tunnels.* Excellent experience in managing puppet r10k.* Excellent Experience in using the GitHub repository.* Proficient in regular Disk management by adding, replacing and partitioning the existing servers according to the requirement and hands on knowledge on SAN.* Excellent Knowledge on creating and managing LVs (logical volume) VGs (volume groups) using LVM (logical volume manager).* Experienced for daily maintenance, configuration, architecting and managing of Linux, Red HAT, Darwin, and CentOS servers.

  Extensive experience of User management by Setting up users and groups, network configuration, password, resolving permissions issues, user and group sudo access management.* Hands on experience in writing a bash and Perl script for automating tasks and have good exposure to Python.

Confidential

System Administrato r

Responsibilities:

• Coordinate the installation, configuration and maintenance of Linux servers including mail servers, application servers, and database. Utilize centralized authentication (Active Directory, NIS, LDAP) systems and shadow file to create, modify and close accounts for Linux/Windows systems in compliance with corporate policies. Interact with 500+ remote and on - site users via email/phone/ticketing systems for their computing needs. Promptly resolve issues ranging from hardware and software issues to desktop start up and server performance issues. Performing OS installations on a daily basis on Desktops and
• Servers (mainly HP and Dell) using PXEboot and kickstart servers. Securing Linux Systems by tweaking firewall (iptables), enabling only needed services. Building servers (NIS, NFS, Automount, Remote access (RSA), KickStart, File Servers, DNS, DHCP, NetBackup and Print Servers). Setting up directory shares with NFS servers and configuring clients (/etc/exports, /etc/fstab). Upgrading packages (rpm, yum) and patching systems to maintain the productive environment. Setting up NIS domains, which involves configuring servers and client roles. Creating netgroups, maps, and propagating maps to slave servers and clients via crontab jobs and manually. Setting up Automounts for home directories in different domains. Creating and modifying scripts (mainly bash) to accommodate the administration of daily tasks. Resolving network & DNS related issues (traceroute, netstat, nslookup, dig, sshd, nfsd, mountd, lockd). Performance system tuning (top, vmstat, iostate). Use puppet master to keep in sync configuration on hosts running agents. Installing LAMP stack and resolving connectivity issues. Troubleshooting and maintaining of TCP/IP, Apache HTTP/S, Tomcat, SMTP, and DNS applications. Knowledge of scripting; modified scripts, functions, loops. Provision remote access to ensure compliance with corporate security guidelines using RSA Security Console. Assign RSA tokens monitor unauthorized activities and unsuccessful attempts and notify network team. Accountable for the security of IT assets, initiated
• Found Stone's network scans to pinpoint vulnerabilities and policy violations. Build Servers, maintain Active Directory Servers, fix domain client connectivity issues and apply OS patches. Administer AD users and groups and promptly resolve hardware/application issues in Windows environment. Installing Netbackup server, clients, and ensuring clients are being backed up regularly. Fixing hosts that are not being backed up regularly and removing non-existing servers from the backup policy to free up resources on the netbackup server. Configuring and maintaining Samba servers to provide access to UNIX home directories and printers on Windows platforms. Installing ESXI 5.5 on Dell and HP servers performed physical to virtual migrations. Installed and maintained LAMP stack and resolving c

Confidential

Linux Systems Administrator

Responsibilities:

• Responsible for complete user management, creating, renewing and deactivating accounts.* Resolving issues with OS installs. Deploying kick start file to accommodate automated installs.* Building and provisioning of RHEL servers using automated approach with PXE boot and custom kick start files.* Installing and Configuring Red Hat Cluster software.* Securing Linux system by updating firewalls and enable only required services.* Working with LVM, extending file system and attaching the storage to VMs.* Setting up NIS domain for central authentication.* Upgrading packages by working on RPM and
• YUM and do patching wherever it is required.* Working with Amazon Web services for cloud computing.* Setting up NFS and Autofs for mounting the resources.* Creating and extending files system such as etx3, ext4, XFS* Monitoring system performance by using top, iostat.* Installed puppet master to keep in sync configurations on running agents.* Responsible for troubleshooting of network related issues.* Configuring LAMP stack and resolved connectivity issues.* Building virtual servers using ESXI 5.5.* Installing and configuring Vcentre and Vmotion.* Migrating hosts between ESXi servers.* Performing
• Physical bare metal to VM conversions.* Creating and cloning VMs.* Configuring and maintaining SAMBA servers for providing access to printers and Windows platform.* Performing system installation using PXE Boot with Kick start and raking, stacking, and cabling systems in the data center.* Keeping track of system inventory and deleting data from servers.* Responsible for Package management by installing upgrading the required packages.* Monitoring the health of system and provide support when system becomes sluggish.* Responsible for Disk management.* Working with Vendors to replace server parts and ordering new hardware.* Responsible for maintaining log files.* Configuring LDAP.* Responsible for system security using vulnerability management.* Troubleshooting and maintaining of TCP/IP, HTTP/s and DNS services.* Responsible for configuring and installation of RAID level.Technology

Environment: s: Platforms: Red Hat Enterprise Linux 5/6/7/8/8.1, CentOS 5/6/7, Ubuntu 12/14, x86/x64• DevOps: Puppet, IBM Object Storage Cloud, Ansible, AWS, GitLab, Splunk, Teamwork Cloud, Cassandra, Flexnet Server.• Hardware: HP ProLiant DL360 Gen 10, HP ProLiant DL580 G6, DL380 G6, DL980 G7, Dell PowerEdge R330, R730, R630, and Cisco switches.• Network/Internet: VPN and Remote Desktop, VNC Server Access, Telnet, SSH, FTP DNS, DHCP Firewall, TCP/IP, and UDP Routers• Networking File System and Servers: DNS, NFS, RPM, YUM, LDAP, Splunk and Auto FS, LAN, WAN, Firewalls, apache Server.• Software and Tools: Nagios, Cloud Computing, Jenkins, Cron jobs, iLo and apache, disk management.• Virtualization: VMware, vSphere, hypervisors, ESXI 5.5/6.0, KVM.