SUMMARY:

Skilled, active and responsible Linux System Administrator, offering 6 years of experience. Team player and good leader, headed the successful project, have vast knowledge of Linux system and architecture, and other IT related fields and applications. Good ability of multitasking and troubleshooting. Able to work in high stress environment with 24/7 on - call rotation. Excellent communication skills and ability to learn fast.

TECHNICAL SKILLS:

OS: RHEL/CentOS 6.X/7.X, IBM AIX, Windows 2008/2008r2 and 2012/2012r2

Virtualization: VMWare Esxi-6.X, Oracle VM, Xen Xencenter 6.X and 7.X, KVM

Servers: NTP, DNS, Web servers, Nagios, LDAP, Samba, AutoFS, NFS, FTP, Mail, PXE, Ansible,Databases.

Security: Network - firewall, iptables. File System - SELinux, Standard File Permission, Default File Permission, Advanced File Permission, Access Control list.

Scripting Language: Bash shell, Python.

Network Booting: PXE, DHCP, Kickstart, Mirror/repo server installation and configurations.

Disk Management: Mounting, File systems troubleshooting, lvm.

Mail: Postfix, Dovecot, Squirrelmail.

Web Servers: Load-balancer, Apache virtual hosts.

Databases: MySQL, MariaDB.

Identity Management: OpenLDAP, PhpLDAPadmin.

Monitoring tools: Nagios.

Automation: Ansible, PXE.

Change Management: iTOP, Jira.

File Sharing: FTP, NFS, AutoFS, and Samba.

DevOps Tools: Git, Jira, Confluence, Ansible, Docker, Kubernetes, and Jenkins, JFrog Artifactory.

Hardware: Dell PowerEdge 2950, Dell R310/400’s, Blade Dell C6100.

Network Management: Basic network configurations, Routing, Binding and Bonding, Network Layers, Network Devices, TCP/UDP Protocols.

AWS Cloud: EC2, S3, Route 53, SNS, Cloud Watch, VPC.

Linux (System) Hardening: RedHat Pluggable Authentication Modules(PAM), SELinux, Firewalld.

PROFESSIONAL EXPERIENCE:

Confidential

AIX/UNIX/Linux Systems

Responsibilities:

• Network and infrastructure monitoring using NAGIOS.
• Manual and automated Kickstart RHEL server’s installation.
• Installing and configuring various network services such as DNS, DHCP, NFS, SMTP, and Apache.
• Provided on call support by rotation 24x7x365.
• Setup of NFS and Samba file sharing services on Linux and Windows.
• Run, maintain, schedule tasks with CRON and ANACRON.
• Creating, and administering Logical Volumes and mounting them.
• Extensively worked on administering and configuring DNS and LDAP services.
• Leader of a successful project creating automated production environment in VMWare consisting of many servers that makes up full work infrastructure.
• Defined and performed system backups and recovery procedures.
• Troubleshooting of day to day system and user problems.
• Installing and configuring VMware ESXI server instances, deploying and creating VMware virtual guests running Linux, UNIX and Windows.
• Installing and configuring Ansible. Installing and modifying packages using Ansible modules. Writing and deploying various playbooks.
• Installing and configuring redundant DNS servers in order to increase efficiency of network exponentially.
• Installing and configuring Nagios server in order to monitor all servers in environment;
• Building and implementing redundant and scalable load balancers with HAProxy. Booting PXE from RHEL Satellite Network and Centos Spacewalk for unattended Linux server deployment for both virtual machine and bare metal installations. Installation, configuration and support of Apache (HTTP) on Linux production servers.
• Managing Amazon Web Services (AWS) infrastructure with automation and orchestration tools such as Chef.
• Proficient in AWS services like VPC, EC2, S3, ELB, AutoScalingGroups(ASG), EBS, RDS, IAM, CloudFormation, Route 53, CloudWatch, CloudFront, CloudTrail.
• Experienced in creating multiple VPC’s and public, private subnets as per requirement and distributed them as groups into various availability zones of the VPC .
• Used security groups, network ACL’s, internet gateways and route tables to ensure a secure zone for organization in AWS public cloud.
• I have been involved the Migration Project from physical infrastructure to AWS Cloud Environment.
• Automated tasks using Bash, Shell and Python Scripting languages.

Confidential

UNIX/Linux System Administrator/Engineer

Responsibilities:

• Installed and configured Linux based servers on virtual environment.
• Provided support for the customers and system maintenance with 24/7 on-call rotation.
• Monitored whole system infrastructure for any errors.
• Documented troubleshooting material for each problem solved for the company database.
• Was responsible for patching the system, as well as managing packages.
• Wrote scripts to automate simple everyday tasks and scheduled those tasks in the system.
• Worked with Windows AD and OpenLDAP to manage users and groups.
• Configured firewall and SELinux settings.
• Set up and managed file sharing tools such as Autofs.
• Provided training in IT with other colleagues for groups of people as a charity project.
• Created,Edited and Configured Pluggable Authentication Modules(PAM). Used a pluggable, modular architecture to give a great deal of flexibility in setting authentication policies for the system.
• Automated tasks using Bash, Shell and Python Scripting.