Hire the best Linux System Administrators in Colombo, LK
Check out Linux System Administrators in Colombo, LK with the skills you need for your next job.
- $15 hourly
- 5.0/5
- (4 jobs)
Hello world! I'm a dedicated IT professional with 8 years of experience, I specialize in Systems Engineering and DevOps with a versatile skill set that spans both Linux and Windows environments. My journey has included diverse roles, from corporate positions to freelancing, which has enriched my expertise and broadened my perspective on various IT challenges. As a Systems Engineering and DevOps enthusiast, continuously exploring new technologies and methodologies to drive innovation and optimize performance. Let's connect and explore how we can leverage technology to achieve exceptional results!
Linux System Administration
NGINXMalware RemovalSSLVMWareRed HatWordPressTerraformAnsibleJenkinsCloud ComputingCI/CDMicrosoft Windows PowerShellBashWindows Server - $15 hourly
- 5.0/5
- (5 jobs)
I am skilled professional in the field of IP Networks , Mobile Packet Core Networks, Netowrk software development and process automation with more than 15-year industry experience. IP Network network related troubleshooting, configuration, designing ,Network Process Automation,Network Software Development, Linux System administration, Network security configurations such as VPN,Firewall ,Web developments are my key areas as freelancer. I have more than 15 years of industry experience above areas. I am looking forwards to accept projects related to above areas with reasonable low rate since I am new to upwork.
Linux System Administration
Multiprotocol Label SwitchingNetwork EngineeringAutomation AnywhereNetwork DesignIPv6PHPPythonWeb ApplicationC#Huawei ARNetwork AdministrationCisco RouterCFirewall - $20 hourly
- 4.7/5
- (50 jobs)
✅ Self-motivated Linux Server Administrator and Network Administrator with more than 10+ years of working experience with different Cloud providers. Ready to take up any challenge. ✅ Expert on, 💎 AWS, Google Cloud, Azure, DigitalOcean or onPrem server management. 💎 Setting up and manage different environment Web Server, Database Server, Mail Server, Load Balancer, Optimization and Security. 💎 Designing Web Server - Building web server based on Apache, Nginx, Nginx/php-fpm, Varnish as backend with high performance tuning and major security issues. 💎 Learning Management Systems – Moodle (Expert) including mobile app (Android & Apple IoS) customization 💎 Document Management Systems – Nextcloud (Expert) and onlyoffice 💎 Security - Malware removal, server hardening using firewall rules, restriction in server login, Web security, Security auditing, fail2ban, mod_security for web attack, mod_evasive DDOS attack prevention, Firewall setup CSF, UFW and iptables. Prevention from mail attack, SSL Certificate installation. 💎 Database Server - Building MySQL, Mariadb database server with high performance , troubleshoot database server problems, tweaking MySQL variables for performance. 💎 Scripting - Bash Scripting for monitoring servers, auto backup. 💎 Mail server- Building mail server for sending and receiving mails postfix, sendmail, setup mail client Roundcube, SquirrelMail, Rainloop, Horde. Dovecot for POP & IMAP, troubleshoot mail issues, configure mail for delivery in inbox. 💎 Monitoring services and servers – LibreNMS, Nagios monitoring tools, tweaking as per requirement, monitor servers using bash script, Tripwire. 💎 Amazon - AWS EC2 server setup, Security. 💎 Cloud Servers & Panel - Management of Ubuntu, Centos, Cpanel, CWP, WHM, Plesk, Webmin, Diretadmin, ISPConfig, JustHost, Godaddy, Linode, Rackspace, Amazon. 💎 Migration - Server migration, website migration, database server migration, mail server migration. 💎 VOIP Solutions - Asterix based PBX (Eg: VitalPBX) 💎 Video conferencing - Zoom (including on premise setup), Jitsi, BigBlueButton 💎 Virtualization Technology - VMware VSphere Esxi, KVM, Xen Server 💎 Networking (CCNP R&S and SP certified) - Hands on experience with CISCO, HP, Extreme, Juniper devices including wireless. 💎 Firewall configurations - Hands on experience with Palo Alto, Check point and Cisco ASA firepower. ✅ Please do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your team.
Linux System Administration
Network EngineeringWeb HostingSquidLAMP AdministrationLearning Management SystemCisco Certified Network ProfessionalPostfix SMTP ServerMoodleSSLDNSMicrosoft AzureNGINXSystem AdministrationServer Virtualization - $50 hourly
- 5.0/5
- (13 jobs)
I am an expert in Cloud computing, DevOps, Virtualization and Linux with more than 12 years’ experience. Specially designing and continues supporting for highly Available, Scalable , Secure and Cost effective cloud solutions on AWS and Azure to host different type of application by enabling important features of the major cloud services. Apart from that, I am highly capable for automating the infrastructure provisioning and setup CI and CD pipeline for container-based applications using Docker, ECS, EKS, GKE, Openshift and Kubernetes. Also I have been automating many aspect of Cloud computing solutions using Lambda function, Shell scripting and Python. Here I have list down the key technologies, I am capable as Cloud DevOps engineer. Cloud Computing -: AWS, GKE and Azure ( Devops and AKS) Containerization & Orchestration -: Docker, Docker Swarm, Kubernetes, AWS ECS, EKS, AKS, OpenShift Infrastructure as Code -: Terraform, AWS CloudFormation, AWS CDK CI and CD Pipeline -: Jenkins, Azure DevOps, Github Action, AWS CodePipeline Monitoring Tools -: Nagios, AWS Cloud Watch, Prometheus Operating Systems -: Red Hat Enterprise Linux ,CentOS, Ubuntu, Amazon Linux Virtualization - : VMware ESXI and VCenter 5/.5.5/6/6.5, VCloud Directory,Site Recovery Manager, Red Hat Virtualization Web application tools -: LAMP, WordPress Languages -: Shell Scripting, Python I have a BSc in Management Information Systems from University College Dublin (UCD) - Ireland and I have certified as AWS-SAP, AWS-SAA, AWS SOA,VCP,RedHat Certified Engineer, RedHat Certified Virtualisation Administrator, VMware certified professional, Cisco Routing and Switching (CCNA) as well as ITIL certifications.
Linux System Administration
Kernel-based Virtual MachineVMware AdministrationTerraformBash ProgrammingJavaDocker Swarm ModeNagios CoreVMware ESX ServerMicrosoft Windows PowerShell - $10 hourly
- 5.0/5
- (18 jobs)
Expert Python Developer working with Python for 5+ years. Delivering Coding Projects that Exceeds Expectations on Upwork for 2+ years. Expert in: 🤖 Automation Scripts: Streamlining tasks with efficient automation. 📊 Excel File Manipulation: Transforming and optimizing Excel data seamlessly. 📈 Data Visualization: Creating impactful visual insights from data. 🖥️ Python GUI Development: Designing user-friendly graphical interfaces. 🐧 Linux Scripting & Support: Troubleshooting and scripting for Linux environments. 🌟 Why Work With Me? Diverse Skill Set: Wide range of Python development skills. Unique Solutions: Tailored solutions for your specific needs. Lifelong Learner: Committed to staying updated with technologies. Attention to Detail: Clean code and thorough documentation prioritized. Nurturing Collaboration: Open communication to realize your vision. 🛠️ Technologies & Frameworks: - Flask - FastAPI - Plotly/Dash - Pandas - NumPy - PySimpleGUI - Windows - Linux - Ubuntu - Fedora - MySQL - PL/SQL - Java - Google Colab - Google Cloud
Linux System Administration
Data AnalysisPython ScriptDashHTMLLinuxFlaskCSSMicrosoft WindowsPlotlyPythonData Visualization - $55 hourly
- 0.0/5
- (0 jobs)
As a Support Engineer, I specialize in creating custom AI-driven solutions like customer support agents that enhance service quality, subject matter expert chatbots for product-specific inquiries, and workflow automation to streamline processes across industries. My passion for innovation and problem-solving drives me to deliver impactful, efficient, and scalable results. Let’s work together to bring fresh, smart solutions that make your business run smoother and smarter.
Linux System Administration
Project WorkflowsVector DatabaseVector EmbeddingChatGPT API IntegrationTechnical SupportAutomated WorkflowAI ConsultingDatabase QueryDatabase AdministrationSoftware Systems EngineeringAI ImplementationAI Agent DevelopmentAI App DevelopmentArtificial Intelligence - $25 hourly
- 4.9/5
- (90 jobs)
Cloud and Systems Engineer with over 15 years of experience IT industry and blend expertise within Microsoft 365, Azure Cloud Solutions, LAN, WAN, Systems such as Windows and Linux. Code Version Management, CI/CD with Git, Puppet others. Kubernetes orchestration and Docker container management experience. I have worked for various international companies including software development companies, educational, institutes, Banking, and Stock exchange. On-premises, public cloud, private cloud, hybrid design and operations expertise. Large AWS, Azure, and Google Cloud deployments and migrations Technology savvy more into Opensource and Networking Solutions. Certifications: Microsoft Certified Azure Solutions Architect Expert Microsoft Certified Azure Administrator ITIL version 3 Cisco Certified Network Associate Cisco Certified Network Professional - Routing Microsoft Certified Professional I have strong skills in the following areas, - Design and deploy solutions in cloud platforms (Azure, AWS) - Office 365 Administration over 5 years - Providing Support for Global level for M365 - Administrating Windows Client Os - Windows 10 - Windows Server 2008 - 2016 Configuration - Pfsense Firewall, IPSec VPN Configuration - Network Infrastructure Design, Deployment, Ongoing Administration / Maintenance, Migration, Optimization/Tuning - System Administration in operating systems such as Centos, Ubuntu, and Windows - Firewall configuration and Administration - MySQL and MS SQL Database Administration - Virtual Server infrastructure (HyperV, VM Ware, etc.) - Network and Server Monitoring - CPanel and Web Hosting panels Installation & management - Windows RDS Solution Provider, RDS Licensing, RDS Wep Apps Solution Provider
Linux System Administration
Cloud ComputingTechnical SupportOffice 365Microsoft AzurePfSenseWindows AdministrationGoogle Cloud PlatformDevOpsFirewallNetwork AdministrationVPNSSLSystem AdministrationNetwork Security - $15 hourly
- 5.0/5
- (17 jobs)
I am the member of the MIS team and covering all release managements and server operations. I currently handle ESXi and ESX server farm in Australia and USA. • Have experience installing, maintaining and troubleshooting VMWare servers. ESXi and ESX Vsphere servers. Installing, maintaining iSCSI software. (OpeanFiler / OPEN-E / HP LeftHand) • Have experience installing, maintaining and troubleshooting MS Windows Server 2008 and 2003. Installing, maintaining and troubleshooting domain controller. Have experience in Active Directory maintaining and troubleshooting. Customizing Group Policies. Scheduling Backups. Domain Replications. DFS Replications. Installing, maintaining and troubleshooting IIS 7 and 6. DHCP Server installation, maintaining. • Have experience installing, maintaining and troubleshooting MS Office SharePoint Server 2007 and 2010. • Have experience installing, maintaining and troubleshooting MS Exchange server 2010. • Have experience installing, maintaining and troubleshooting following software firewalls. MS ISA Server 2006. Untangle (Open Source) SmoothWall (Open Source) • Have experience installing, maintaining and troubleshooting PLESK control panel and Cpanel. • Have experience installing, maintaining and troubleshooting UBUNTU/ CentOS / RedHat / SUSE Linux / Sun Solaris servers. Installing Apache Server, Virtual hosting, Apache SSH configurations and Apache failover clustering. Installing MySQL Server, MySQL data base replication and failover cluster. Installing FileZilla FTP Server Scheduling cron jobs. ISC DHCP failover clustering. • Have experience installing Windows 7, Windows XP, UBUNTU, KUBUTU, and Fedora. • Have experience working with Amazon cloud computing and Soft Layer cloud computing. • Have experience in installing, maintaining and troubleshooting wireless network. • Can maintain and troubleshoot LAN environment. • Have experience installing MS SQL 2008 and 2005 servers. I’m maintaining daily backups in MS SQL servers and database management. • Have Experience installing and maintaining CISCO ASA 5505 Firewall, CISCO Routers and CISCO Switches. Routing Protocol RIP, IGRP, RIP v2, EIGRP, OSPF Creating Vlan Nating Creating VPN
Linux System Administration
VMware ESX ServerRackspace Cloud ServersVMware AdministrationRedmineMagentoRed Hat AdministrationWindows 7 AdministrationWeb Host ManagerNGINX - $25 hourly
- 0.0/5
- (0 jobs)
Looking to modernize your infrastructure, automate deployments, or secure your environment? I’m a Lead DevOps & IT Infrastructure Engineer with 7+ years of hands-on experience in: ✅ Cloud Platforms – AWS, Azure ✅ CI/CD Pipelines – Jenkins, GitLab, Azure DevOps ✅ Containerization – Docker, Kubernetes ✅ Automation – Python, Bash, PowerShell ✅ Linux & Windows Server Administration ✅ Active Directory & Domain Controllers (DC) ✅ FSLogix User Profile Management ✅ Terraform, Ansible, Infrastructure as Code ✅ Monitoring – CloudWatch, Zabbix, Grafana I specialize in hybrid environments — ensuring smooth integration between cloud and on-prem systems. From secure AD deployments to cloud-native apps, I deliver scalable, secure, and high-performing solutions. 💬 Let’s discuss how I can support your business goals with top-notch automation and rock-solid infrastructure!
Linux System Administration
TerraformDevOpsApplication ServerIBM WebSphereWindows AdministrationAnsibleAzure DevOpsCI/CDJenkinsAWS LambdaSQLWritingOracleBitbucket - $12 hourly
- 0.0/5
- (1 job)
With over 12 years of IT experience, including 5+ years as a Senior DevOps Engineer, I specialize in architecting, implementing, and managing cloud infrastructures with a focus on AWS services, CI/CD pipelines, and cloud security. My work drives efficiency, reduces costs, and ensures the scalability of applications in dynamic environments. Why Work With Me? ✅ AWS Expertise: Proficient in AWS CloudFormation, Terraform, and a suite of AWS services such as ECS, EKS, Lambda, S3, VPCs, and more. ✅ CI/CD Champion: I design and deploy seamless CI/CD pipelines using tools like Jenkins, Github Action, AWS CodePipeline, and Docker for streamlined software delivery. ✅ Cloud Security: Experienced in implementing security best practices using AWS GuardDuty, CloudTrail, and Cloud Custodian, ensuring compliance and robust protection. ✅ Cost Optimization: Helped organizations reduce cloud costs by 20-30% through proactive monitoring, resource right-sizing, and billing alerts. ✅ Monitoring Solutions: Skilled in setting up advanced monitoring with Grafana, CloudWatch, Zabbix, and PRTG to maintain high availability and performance. What I Can Do for You: * Infrastructure as Code (IaC): Deploy scalable AWS infrastructure using Terraform and CloudFormation. * Cloud Security: Configure secure architectures with IAM, S3 bucket policies, and VPC configurations. * Container Orchestration: Deploy and manage containers using ECS, EKS, Docker, and Kubernetes. * Automation & Deployment: Build CI/CD pipelines for automated builds, tests, and deployments. * Monitoring & Alerts: Implement advanced monitoring for your applications and infrastructure. * Cost Optimization: Help you optimize cloud spending and resource utilization. Technical Skills: - Cloud Platforms: AWS (ECS, EKS, Lambda, S3, CloudFront, VPC, Route 53, etc.) - IaC Tools: Terraform, CloudFormation - CI/CD: Jenkins, Github Action, AWS CodePipeline, Octopus - Monitoring: CloudWatch, Grafana, Zabbix, PRTG - Operating Systems: Linux, Windows Server - Programming: Bash, Python, Helm - Database Management: Aurora Serverless, MySQL, PostgreSQL
Linux System Administration
Windows ServerAmazon CloudWatchSystems EngineeringDockerZabbixKubernetesGrafanaDevOpsJenkinsCI/CDAWS CloudFormationMySQLTerraformAmazon Web Services Want to browse more freelancers?
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