KARTHIK L S
MADURAI
Summary
Determined, energetic and diligent professional with over 6 years of experience in UNIX/Linux system administration and AWS Cloud services seeking an opportunity to utilize my talents in a professional capacity, employing comprehensive knowledge and vast professional experience.
Overview
7
7
years of professional experience
Work History
Linux Systems Administrator
HCL Technologies Limited
MADURAI
02.2017 - Current
- Installed Red Hat Enterprise Linux 7 & 8 using Kickstart and applying security policies for hardening the server based on the company policies. , Appliance servers (CENTOS) using customized ISO/OVA images provided by application vendor.
- Excellent knowledge of services like DNS, DHCP, NFS, Sendmail, Apache Web Server,Samba, SSH, Telnet, HTTP, YUM, RPM Package Management
- Developed UNIX shell scripts to accomplish redundant tasks to simplify in distributed administration
- Performed daily system monitoring, verified the integrity and availability of all hardware and server resources, and reviewed system and application logs
- Evaluated performance of systems to see that they meet business needs.
- Software installation: This includes the standard packages which is on our REPOS and also the 3rd party packages which will be signed up by requestors and will be exporting it to RHEL repos .
- Adding the key to YUM Trustfile, so new systems would automatically trust packages signed with new key, and then import whole file to RPM trust database and regen the repository metadata for the specified repos.
- User Management & Administration. It includes any user related login issues and Unix Linux administration and usage of Centrify which bridges the servers with AD and granting Elevated rights via Centrify AD.
- SSC Vulnerabilities remediation related to Linux servers (OS Level).
- Patching the server to the latest release as per the client requirement
- Configuring the gateway at the server level for redundancy , NIC configuration live virtual IP and bonding on servers..
- Decommissioning of servers as per the client request .
- ASM Disk addition on RAC DB Servers .
- Splunk Monitoring – splunkforwarder installation which helps to monitor the server status.
- Playbook executions through the Ansible tower.
AWS Cloud Administrator
- Current
- Manage Amazon Web Services - ELB, EC2, S3, RDS, SNS, Cloudwatch
- Expertise in architecting secure VPC solutions in AWS with the help of Network ACLs, security groups, public and private network configurations
- Create S3 buckets and also managing policies for S3 buckets
- Experience in managing and maintaining IAM policies for organizations in AWS to define groups, create users, assign roles and define rules for role based access to AWS resources
- Create snapshots and amazon machine images (AMIs) of the instances for backup and creating clone instances
- Hands on experience in writing Ansible scripts for servers to install LAMP stack
- Used JIRA to track issues and Change Management
- Manage systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance
- Create and maintain user's accounts, profiles, security, rights disk space and process monitoring
- Provide technical support by troubleshooting day-to-day issues with various Servers on different platforms
Education
Bachelor of Engineering Technology - Electrical, Electronics And Communications Engineering
KLN College of Engineering
Madurai, TN03.2015
High School Diploma -
TVS Matric. Hr. Sec. School
Madurai,INDIA03.2011
SSLC -
Velammal Hr. Sec. School
Madurai,INDIA03.2009
Skills
- OS: Red Hat 6,7,8, Ubuntu
- Scripting: Bash, Python(basic)
- Web: Apache, Apache Tomcat,Nginx
- Automation: Ansible
- Backup: NetBackup, rsync, tar, zip
- Networking: DNS, TCP/IP, DHCP, NFS, SSH, SAMBA, LDAP
- Security: Firewalld, iptables,Selinux
- Monitoring: SNOW, AWS Cloudwatch
- Troubleshooting: top, free, ping, tcpdump, telnet, netstat, traceroute
- Virtualization: VMWare ESXi, KVM,Vsphere Web Client
- AWS: S3, IAM, EC2, Route53, VPC, SNS, ELB, Cloudwatch, Auto Scaling
- Tools: JIRA, PAM (Privileged Access Management) CYBERARK,SPLUNK,CENTRIFY & BLUECAT
MANAGEMENT SKILLS
- Analyzing the tickets and providing permanent fix for the issues. Understanding the customer requirements without assumptions and acting upon the requests and provided permanent resolution to avoid reopening cases.
- I have been on all high priority issue management calls till the issue closure with permanent fix.
- Adhering to the process defined for the project and Company Baseline policies Handling the tickets and tasks without any breach in both response and resolution SLA Working on the change request as per the plan. Following Doer-Checker process as per Company Baseline requirement wherever required Met the CSLs based business requirements and as defined.
- Creating SOP & KBs (Method of Procedure)
- Raising Change requests according to the necessary changes required, taking approvals from the Business Owners.
- Categorize all incidents and alerts and preparing knowledge articles following ITIL best Practices
Timeline
Linux Systems Administrator
HCL Technologies Limited
02.2017 - Current
AWS Cloud Administrator
- Current
Bachelor of Engineering Technology - Electrical, Electronics And Communications Engineering
KLN College of Engineering
High School Diploma -
TVS Matric. Hr. Sec. School
SSLC -
Velammal Hr. Sec. School
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