SUMMARY:

• Substantial hands on technical expert with an overall 12+ years of experience as Linux/Unix System Administrator/Infrastructure build and manage on Cloud, on premise, Virtual environment and other IT and Telecom sectors. Detail oriented, accomplished, outcome driven, problem solver, self starter, lead/manage team independly, little/no supervision. Comfortable adapting to rapidly changing environments.
• Experience in CI/CD Automation Tools such as Jenkins, AWS CloudFormation, AWS OpsWorks.
• Proficient in Amazon Web Services such as AWS Lambda, EC2, ECS, VPC,S3, RDS, DynamoDB, Lambda, IAM, SQS, SNS.
• Expertise in Infrastructure Configuration using Orchestration Tools as Chef, Ansible, Puppet.
• Experience in Containerized Application Deployment using Kubernetes and Docker
• Experience working with Source Control Management tools such as Git, SVN
• Proficient in Unix/Linux based OS Configuration and code for automated tasks using scripting in Bash, shell, python.
• System administration on RHEL, OEL, CentOS, SUSE, Solaris, VMware and Windows
• Hands on experience with Services/Systems like Apache, LAMP, VMware virtualization, Software Load Balancer
• Expertise in Performance Monitoring Tool like Nagios, AWS CloudWatch, Cacti.
• Expertise in managing several file systems using Logical Volume Manager (LVM), SVM, ZFS, VXFS
• Experience in Opscneter to deploy Solaris LDOM and Zone.
• Experience in database like Oracle, Informix, Timesten, MySQL.
• Experience in Storage (Hitachi/EMC/XIO)

PROFESSIONAL EXPERIENCES:

Confidential

Sr. Unix Administrator (SME)

Responsibilities:

• Managing systems backup ( Avamar and Veritas Netbackup ) .
• Setting up network environments using TCP/IP, NIS, NFS, DNS, SNMP agents.
• IP configuration, bonding, IPMP, Teaming and troubleshooting using ethtool, tcpdump. Snoop, ARP.
• User and group management as requested.
• Vcpu and memory allocation in ESX as requested .
• Configured High Availability clusters ( RAC , VCS ) on Linux .
• Preparing servers for Oracle RAC including tuning the kernel, passwordless ssh, SELINUX , GRUB configuration .
• Involved in Datacenter server migration , cloning , vmotion , P2V , V2V using vmware converter and OVF .
• Data migration with Robocopy .
• Created and managed templates in VCenter .
• Created Standard and Distributed Switches (dvSwitch) and VLAN in the vCenter for making use of best network design and stability across the vCenter.
• Storage configuration using Logical Volume Manager ( LVM) , Veritas Volume Manager ( VxVM) .
• Deployed VMs using OVF / OVA Templates.
• SAN assessment for decom server and remove from Hitachi, EMC device as well as unzoning and port reclaim from Cisco and brocade switch.
• Perform scripting on Perl and shell to perform build QA .
• Configuring the FTP , DNS , SMTP , NTP and troubleshooting them.
• Installing and configuring opsware agent to patch all Linux , windows and solaris servers.
• Managing internal DNS server records addition.
• Implement infrastructure using AWS , EC2 , S3 , ALB , IAM , VPC , VPC peering , Cloudformation, Resizing root EBS volume, Route 53
• Hands on experience with using Lambda function to create job.
• Deploying Ansible, Deploying service with ansible, Create some playbooks.
• Install Docker Container, Deploying website,
• Install and configure Jenkins. Building jenkins CI/CD pipelines. Deploying docker container and Kubernetes with Jenkins pipelines.
• Install Kubernetes and orchestration docker container
• Build Infrastructure , involves builds and decommissioning of Solaris, Linux (RHEL 5x, 6x 7x OEL 5x, 6x 7x), Windows (2K3, 2K8, 2K12, 2K16 ), ESX servers.
• Deploy servers using Kickstart , Jumpstart and wanboot .
• Configuring and sizing of Solaris LDOM and Zone through Opscenter .
• RPM and YUM package installations, patch and other server management.

Confidential

Sr. System Engineer

Responsibilities:

• Installation of RHEL (RedHat Enterprise Linux) 5.X, 6.X, 7.X administrator and server maintenance.
• Automate server health checkup using script.
• Experienced on string processing utility ( AWK , SED , cut , tr , grep )
• Experienced in Installation, configuration of application and web server.
• Built Solaris servers, including LDOMs and Zones.
• Involved in supporting and maintenance of HP ProLiant servers, HP blade systems, Dell PowerEdge Servers, Sun Fire V series, T series and M - series servers
• Diagnosis and maintenance of hardware issues involving single and multiple point failures, working with vendors for H/W replacements.
• Creating and managing Virtual Machines and Templates on VMware ESX (4.x, 5.x)
• Support autofs mounts, installing packages using yum and rpm packagement on Linux.
• Experience installing, configuring, tuning, and supporting Linux servers.
• Involved extensively in virtualizing and managing them using VMware and VCenter VSphere.
• Experienced in tasks like managing User Accounts and Groups, managing Disks and File Systems.
• Worked on Analyze system performance, client to server traffic and server to server traffic.
• Performed OS provisioning using Kickstart and Jumpstart.
• Experienced with VMware Virtualization using ESX hypervisor of VSphere.
• Create, extend, reduce and administration of Logical Volume Manager (LVM) in RHEL environment.
• Maintaining Solaris Volume Manager (SVM)
• Storage configuration (SAN and NAS).
• Configuration of Network bonding which include Active/Standby and Active/Active.
• Tune kernel in RHEL and OEL.
• Ensure daily backup using rsync .
• Experienced on version control tool ( Git , SVN ).
• Troubleshooting Network,memory,cpu,swap and File system issues,TCP/IP, NFS, DNS, SMTP in Linux and Solaris servers.
• Creation of Jumpstart and Kickstart configuration for the automatic provision of servers.

Confidential

Linux/Unix System Admin istrator

Responsibilities :

• Installation and troubleshooting of RHEL , Debian , Ubuntu , and SUSE (10, 11)
• Writing shell and Perl scripts for automation of various repitative tasks.
• Configuring file systems using Logical Volume Manager ( LVM ) .
• Installation of ESXi , creation of new CentOS servers, worked on creating and monitoring new virtual machines.
• Experience in Install ing LAMP stack, backup and restore MySQL database.
• Experience in configuring multipathing for RHEL 6 servers and HP - UX servers.
• Configuring DNS, subnetting , TCP/IP, NFS, DHCP .
• Install and maintenance of Nagios and adding new server.
• Experience in administering, troubleshooting and deployment of Tomcat 6.x
• Hands on experience on configuring Load balancer ( haproxy )
• Experience in managing and troubleshooting Apache Web servers .

Confidential

Application and Software Engineer

Responsibilities:

• As a technical expert engaged in overseas project in Bhutan.
• Design, planning and deploy application software in Tashi Cell, Bhutan.
• Support one of the biggest telecom operators (Robi) in Bangladesh and multiple telecom operators in Bangladesh.
• Installing and configuring Linux and Solaris OS on IBM Servers. Installation, Configuration, Administration & Trouble Shooting of RHEL servers on large scale.
• Creating and deleting user - ids as per requests.
• Closely working with network team and security team.
• Operating system tuning.
• Handling trouble ticket and Incident management maintaining SLA.
• Monitoring and troubleshooting system performance related activities.
• Experienced on job scheduler ( cron , at ).
• Write and execute script to automate repitative task.
• Database and application backup/recovery and monitoring.
• Working on change management.
• Job scheduling using cron, at.
• Review and Maintain logs of production failures and resolutions.
• System updates.
• Assigning LUNs to the server.

Confidential

Support Engineer

Responsibilities:

• CPU , Memory , disk checking .
• Performance monitoring .
• Installing and maintaining monitoring tool Cacti , dstat , sysstat .
• DNS , mail , Samba , apache installation and maintenance.
• Hands on experience using the VI editor.
• Install, configure, tuning, security, backup, recovery and upgrades of RHEL 5.5 and higher.
• Perform day to day System Admin tasks.
• Good Knowledge of LVM, which include creating PVs, VGs, LVs and filesystems and troubleshooting.