Linux System Administrator - 24502

• Successfully managed and maintained the IT infrastructure on offshore vessels, ensuring smooth operations and minimal downtime.
• Oversaw system updates, software installations, and troubleshooting to resolve technical issues promptly.
• Collaborated with a diverse team to support crew members in utilizing technology effectively during offshore operations.

·       Configuration of Monitoring server using Prometheus and node_exporter for all nodes.

·       Creation CA_SERVER and signing intermediate,server and user certificates.

·       Configuration of Mail Server(Postfix,Dovecot,SquirrelMail)

·       Working with disks,vgo,lv etc.

·       Configuration of Nginx Failover Cluster

·       Configuration of WINSCP Server on Ubuntu

·       Configuration of NFS Sharing as per Database Administrators request.

·       Carrying out multiple tasks using Ansible.

·       Providing 24/7 dedicated support to all Production Environments

·       Provisioning and tuning CentOS, Redhat, Ubuntu according to the request

·       Configuration and supporting HAProxy, Keep-alive for High Availability and Load

Balancing for applications such as JasperPrint and in-house applications.

·       Migration of   Internet Banking from IBM Websphere to Tomcat architecture and set

up HA

·       Automatation of the routine deploy tasks like gathering/truncating logs

·       Regularly usage of Ansible ad-hoc commands and Ansible playbooks for configuration

of more than 300 servers

·       Provision plan report for network segmentation of Linux machines

·       AD integration of Linux machines and provision required permissions to users service

users on AD.

·       Configuration of NFS sharings between linux VMs and their proper mountings, Samba

shares between Windows and Linux.

·       Writing multiple scripts for routine repetitive jobs.

·       Managed SSL certificate lifecycle, including acquisition, installation, and renewal, to

secure communication channels and enable HTTPS protocols.

·       Configuration of LAMP/LEMP stacks and configuration on them Owncloud,

NextCloud, FileBrowser etc.

· Installed and configured NTP HACluster using pacemaker and corosync to ensure high

availability and synchronization of time across multiple servers.

· Implemented LinOTP and FreeRadius server, integrating it with LDAP for user

authentication. Configured Linux VMs using the pam_radius_auth module to enable

one-time password (OTP) login for PAM users.

· Deployed and configured phpIPAM server, providing centralized IP address management

and subnet monitoring for the organization.

· Installed and configured Ansible server for efficient management and automation of

Linux VMs, streamlining administration tasks and ensuring consistent configurations

across the infrastructure.

· Deployed Zabbix server and client on Linux VMs, monitoring system performance,

network devices, and applications to proactively identify and resolve issues.

· Configured local repository servers for all Linux Distributions utilized.

· Installed and configured Apache Tomcat, Nginx, and Apache servers, ensuring reliable and

scalable web hosting services for various applications.

· Installed and configured Bind9 primary&secondary DNS servers and migrated zones from

Windows DNS.

· Managed SSL certificate lifecycle, including acquisition, installation, and renewal, to secure

communication channels and enable HTTPS protocols.