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I'm Nevin Davis, I have a degree and diploma in Computer Science and Engineering. I'm a redhat certified engineer with 8 years of experience as a server administrator. My strengths and skills are:- * Well knowledge in AWS, Google Cloud, Azure... etc * Sound knowledge in Linux/Unix like operating system. * Deep knowledge in cPanel/WHM. * Familiarize with Plesk, Interworx, Website Panel, Webmin, Directadmin, CyberPanel, HestiaCP. * Automated installation of Red Hat Enterprise Linux. * Network configuration and troubleshooting. * Server hardening. * Managing partitions and file systems. * Managing flexible storage with LVM. * User Management & Administration. * Managing selinux. * Basic creation and troubleshooting on scripting like Shell/Perl. * Installing and managing softwares. * Managing installed services. * Kernel re-configuration & parameter tuning. * Installation of patches and packages. * File sharing with FTP. * NFS configuration & administration. * Job Scheduling and Automating process using CRON. * XEN, OpenVZ virtualization. * RAID * Idera Back up server management. * Familiarize web servers- Apache, Litespeed, Nginx. * Deep knowledge in SolusVM. * Migration. * SSL Cert generation, installation. * IPMI, KVM console management. * Billing Module Management(whmcs,vision,osticket) * VPS, Shared and Dedicated server Management * Monitoring (Nagios) & troubleshooting with performance related issues. * Installation of Antivirus and Troubleshooting with virus related issues.

Linux System Admin & DevOps Engineer My name is Almiñana Dario I am a expert Linux Server Administrator & PHP, Python programmer having 15+ years experience and ready to work. -- You can see my general skills below -- * Optimization Google Pagespeed, Magento, Wordpress, Drupal, Joomla and other CMS(administration, configuration, audit, optimization, little codding); * OS’s: Debian, Ubuntu, CentOS, RedHat, CloudLinux, Gentoo, FreeBSD (administration, configuration, audit, optimization); * Software Configuration Management: Salt, Ansible; * Web servers: nginx, Apache, SSL, PHP, PHP-FPM, Ruby, NodeJS, Python for all servers mentioned above.(installation, configuration, optimization); * Database servers: MySQL, Postgresql, MariaDB, Percona, MongoDB (installation, configuration, optimization, profiling); * Mail servers: Exim, Postfix, Sendmail, Zimbra, Qmail, Dovecot + Spamassassin, ClamAV; * Webhosting Administration Panels: cPanel, Plesk, VestaCP, Proxmox, ISPManager, Billmanager, VMManager, ISPConfig, DirectAdmin, webmin; * Amazon: AWS setup or Amazon tools; * Virtualization: OpenVZ, XEN, KVM, VMWare, VirtualBox, Docker; * Load balancing via: HAproxy, Nginx, PowerDNS, BIND; * System Backup and Restore automation; * Network services: dns (bind, powerdns), vpn (mpd, pptpd, openvpn), firewalls (iptables, ipfw), file server (samba3/4), proxies (squid, 3proxy, privoxy, nginx), drbd, Ceph, GlusterFS, lsyncd; * Monitoring: Zabbix, Munin, Nagios, Icinga; * FTP: Vsftp, Pureftp, Proftp. * Providers I use: Vultr, DigitalOcean, Linode. Google cloud, Rackspace, GoDaddy, Hetzner, AWS (Amazon Web Services) such as: EC2, Elastic * * Beanstalk, ECS, Auto Scaling, ELB, RDS, VPC, S3, Cloudfront, CloudWatch, IAM, SNS, SES, SQS, Route53, etc. * Other services I am working with: Cloudflare, Namecheap, Godaddy, Docker, TravisCI, Ansible, CodeCov * Source Code Management Systems I prefer: Gitlab, Github, Bitbucket * Automation: Chef, Puppet, Ansible

🏆 Top Rated Plus | 100% Job Success 🏆 Senior Infrastructure Engineer 🏆 Linux • Networking • Monitoring • Automation • Security Operations • Windows • DevOps I help businesses design, troubleshoot, monitor, secure, and automate production infrastructure environments. With 15+ years of hands-on experience across Linux systems, cloud infrastructure, enterprise networking, monitoring platforms, observability workflows, infrastructure automation, and security operations, I focus on solving complex operational and infrastructure challenges reliably and professionally. ━━━━━━━━━━━━━━━━━━ 💻 Infrastructure & Linux Engineering ━━━━━━━━━━━━━━━━━━ ✅ Linux administration (Ubuntu, Debian, AlmaLinux, CentOS, RedHat) ✅ Infrastructure troubleshooting & operational support ✅ Server hardening & patch management ✅ Performance tuning & infrastructure optimization ✅ Docker & containerized environments ✅ VPN deployments (WireGuard, OpenVPN, IPsec) ✅ DNS troubleshooting & infrastructure migrations ✅ NGINX, Apache, LiteSpeed optimization ✅ MySQL, MariaDB, PostgreSQL administration ✅ Infrastructure monitoring & operational visibility ━━━━━━━━━━━━━━━━━━ 📊 Monitoring & Observability ━━━━━━━━━━━━━━━━━━ ✅ Zabbix deployment, templates, alerting & monitoring ✅ Graylog centralized logging & syslog ingestion ✅ Infrastructure observability workflows ✅ SNMP monitoring & telemetry collection ✅ Infrastructure dashboards & alerting strategies ✅ Log parsing, visibility & operational troubleshooting ✅ Monitoring Linux servers, switches, VPS, cloud environments & infrastructure services ━━━━━━━━━━━━━━━━━━ 🌐 Network Engineering ━━━━━━━━━━━━━━━━━━ ✅ Arista & Cisco Nexus operational support ✅ VLANs, VRFs, routing & switching ✅ WireGuard & site-to-site VPN deployments ✅ A10 Networks & CGNAT operational support ✅ Network troubleshooting & operational visibility ✅ Firewall policy troubleshooting ✅ Infrastructure telemetry & monitoring integrations ✅ Infrastructure cabling & operational deployments ━━━━━━━━━━━━━━━━━━ ☁️ Cloud & Infrastructure Operations ━━━━━━━━━━━━━━━━━━ ✅ AWS infrastructure support ✅ Cloudflare integrations & DNS management ✅ EC2, VPC, RDS, Redis & infrastructure deployments ✅ Amazon SES, SPF, DKIM & DMARC configuration ✅ Email deliverability troubleshooting ✅ Cloud migrations & infrastructure onboarding ✅ Infrastructure automation using Bash & Python ━━━━━━━━━━━━━━━━━━ 🔐 Security Operations ━━━━━━━━━━━━━━━━━━ ✅ Vulnerability remediation support ✅ Security hardening & MFA enforcement ✅ Incident response & operational troubleshooting ✅ Malware cleanup & compromised server handling ✅ Infrastructure security baselines ✅ Operational security reviews ✅ ISO27001 / SOC2 / HIPAA operational support ━━━━━━━━━━━━━━━━━━ 🛠️ Platforms & Technologies ━━━━━━━━━━━━━━━━━━ 💻 Linux: Ubuntu • Debian • AlmaLinux • CentOS • RedHat 🌐 Networking: Arista • Cisco Nexus • WireGuard • VPN • VLAN • VRF • A10 Networks 📊 Monitoring: Zabbix • Graylog • SNMP • Syslog • Telemetry ☁️ Cloud: AWS • Cloudflare • DigitalOcean • Linode • Vultr ⚙️ Automation: Bash • Python • REST APIs • Infrastructure Automation ━━━━━━━━━━━━━━━━━━ 🚀 What You Can Expect ━━━━━━━━━━━━━━━━━━ ✅ Clear communication ✅ Production-safe execution ✅ Strong troubleshooting methodology ✅ Clean documentation ✅ Long-term operational stability ✅ Infrastructure-focused solutions ✅ Reliable and professional support I am comfortable working independently, collaborating with internal teams, troubleshooting production incidents, and supporting long-term infrastructure operations across enterprise and MSP environments.

Experienced System Administrator with comprehensive expertise in managing, maintaining, and optimizing complex IT infrastructures. Specialized in enterprise-level server administration, cloud computing, and implementing robust security solutions. Committed to delivering reliable, scalable, and cost-effective IT solutions that align with business objectives. --- CORE COMPETENCIES -- System Administration: - Windows Server Administration (2012/2016/2019/2022) - Linux Server Management (RHEL, CentOS, Ubuntu, Debian) - Active Directory, DNS, DHCP, Group Policy Management - User Account Management and Access Control - System Performance Tuning and Optimization -- Cloud Infrastructure: - Amazon Web Services (AWS) - EC2, S3, RDS, VPC, IAM - Microsoft Azure - VMs, Storage, Azure AD, Networking - Google Cloud Platform - Compute, Storage, Networking - Cloud Migration and Hybrid Cloud Implementation - Cost Optimization and Resource Management -- Virtualization & Containerization: - VMware vSphere, ESXi, vCenter - Microsoft Hyper-V - Docker and Kubernetes - Container Orchestration and Management - Virtual Machine Deployment and Maintenance -- Network Administration: - Network Configuration and Troubleshooting - Firewall Configuration and Management - VPN Setup and Administration - Load Balancing and High Availability - Network Security and Monitoring --- TECHNICAL EXPERTISE - Operating Systems: Windows Server, Linux (Multiple Distributions), Unix, macOS - Database Systems: MySQL, PostgreSQL, Microsoft SQL Server, MongoDB, MariaDB - Web Servers: Apache, Nginx, IIS, Tomcat, LiteSpeed - Monitoring Tools: Nagios, Zabbix, Prometheus, Grafana, DataDog, New Relic - Backup Solutions: Veeam, Acronis, Bacula, AWS Backup, Azure Backup - Automation Tools: Ansible, Terraform, PowerShell, Bash Scripting, Python - Security Tools: Firewall Management, SSL/TLS, VPN Technologies, Security Auditing - Collaboration: Microsoft Exchange, Office 365, Google Workspace --- SERVICES PROVIDED -- Infrastructure Setup & Configuration - Server deployment and initial configuration - Network architecture design and implementation - Storage solution setup (SAN/NAS/DAS) -- Maintenance & Support - 24/7 system monitoring and alerting - Regular maintenance and updates - Performance optimization and troubleshooting - Incident management and resolution -- Cloud Services - Cloud migration planning and execution - Multi-cloud environment management - Cloud cost optimization - Disaster recovery setup -- Security Implementation - Security assessment and hardening - Backup and recovery strategy - Compliance management - Access control and authentication -- Documentation & Reporting - System documentation and runbooks - Regular performance reports - Capacity planning reports - Incident and change management documentation --- PROJECT EXPERIENCE - Successfully managed IT infrastructure for organizations ranging from startups to enterprises - Implemented high-availability solutions achieving 99.9% uptime SLA - Executed seamless cloud migrations with zero data loss - Designed and deployed disaster recovery solutions - Automated routine tasks reducing manual intervention by 70% - Optimized infrastructure costs resulting in 30-40% reduction in IT expenses --- PROFESSIONAL APPROACH -- Planning & Analysis - Thorough assessment of current infrastructure - Identification of improvement opportunities - Strategic planning aligned with business goals -- Implementation - Methodical deployment following best practices - Minimal disruption to business operations - Comprehensive testing and validation -- Support & Optimization - Proactive monitoring and maintenance - Continuous improvement initiatives - Regular performance reviews and optimization --- CERTIFICATIONS & QUALIFICATIONS - Microsoft Certified: Azure Administrator Associate - AWS Certified Solutions Architect - CompTIA Server+ and Network+ - ITIL Foundation Certified - Red Hat Certified System Administrator (RHCSA) --- AVAILABILITY & TERMS -- Engagement Types: - Hourly consultations - Fixed-price projects - Monthly retainer agreements - Emergency support services -- Communication: - Daily status updates - Weekly progress reports - Available via Upwork messages, email, Slack - Video conferencing for meetings -- Working Hours: - Flexible schedule across time zones - Emergency support available 24/7 - Response time within 2-4 hours -- WHY WORK WITH ME: Proven Track Record: Extensive experience managing diverse IT environments Reliable & Responsive: Quick turnaround times and consistent communication Cost-Effective Solutions: Focus on ROI and operational efficiency Security-First Approach: Emphasis on data protection and compliance Documentation: Comprehensive documentation for all implementations Knowledge Transfer: Training and support for your team Contact me today to schedule a consultation and take the first step toward optimizing your IT infrastructure.

⭐️ Top Rated Plus - Top 3% Expert on Upwork 🕒 9000+ Working Hours ✅ 20+ Years of Expertise ✅ 100% Job Success ✅ 300+ Successful Projects Finished ✅ 5 Star Rating Hello, I'm Oleksandr. As a seasoned Linux System Administrator and DevOps Engineer with over 20 years of experience I specialize in delivering robust IT solutions that enhance operational efficiency and security. My expertise spans across various domains, including: ▪ DevOps & Automation: Successfully implemented automated provisioning using Ansible, streamlining deployment processes and reducing manual intervention. ▪ Linux & FreeBSD Maintenance: Managed and optimized server environments on CentOS, Debian, Ubuntu, RHEL, and FreeBSD, ensuring high availability and performance. ▪ Cloud Hosting: Deployed and maintained scalable cloud solutions on AWS, Azure, and DigitalOcean, enhancing infrastructure reliability and scalability. ▪ Virtualization: Utilized Docker, VirtualBox, and OpenVZ to create flexible and efficient virtual environments, supporting diverse application needs. ▪ Web & Database Servers: Configured and maintained Apache, Nginx, MySQL, PostgreSQL, and MongoDB servers, ensuring secure and efficient data handling. ▪ Networking & Security: Implemented secure networking solutions, including VPNs and firewalls, to protect sensitive data and maintain network integrity. I am committed to continuous improvement and staying abreast of the latest industry trends. My approach is rooted in ITIL best practices, ensuring incident management and business continuity planning are at the forefront of my work. Let's collaborate to drive your IT projects to success with innovative solutions and expert guidance.

✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 8+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik