You will get Oracle database troubleshooting and connectivity support
Rising Talent
Rising Talent
Project details
You will receive professional Oracle database troubleshooting and connectivity support for Linux or Windows environments.
This project is focused on identifying and resolving Oracle listener, TNS, SQL connectivity, and database-related issues quickly and efficiently.
I can assist with:
• Oracle listener and TNS troubleshooting
• SQL*Plus and Oracle client connectivity issues
• Oracle service validation
• Linux and Windows Oracle environments
• PDB/CDB connectivity troubleshooting
• ORA- error diagnostics
• Basic SQL and performance analysis
I use a structured troubleshooting approach to identify root causes and provide practical recommendations or corrective actions.
This service is ideal for developers, administrators, and businesses that need reliable Oracle database troubleshooting and technical support.
This project is focused on identifying and resolving Oracle listener, TNS, SQL connectivity, and database-related issues quickly and efficiently.
I can assist with:
• Oracle listener and TNS troubleshooting
• SQL*Plus and Oracle client connectivity issues
• Oracle service validation
• Linux and Windows Oracle environments
• PDB/CDB connectivity troubleshooting
• ORA- error diagnostics
• Basic SQL and performance analysis
I use a structured troubleshooting approach to identify root causes and provide practical recommendations or corrective actions.
This service is ideal for developers, administrators, and businesses that need reliable Oracle database troubleshooting and technical support.
Database Type
OracleWhat's included
| Service Tiers |
Starter
$30
|
Standard
$80
|
Advanced
$150
|
|---|---|---|---|
| Delivery Time | 1 day | 2 days | 3 days |
Number of Revisions | 1 | 2 | 3 |
Source Code | - | - | - |
Optional add-ons
You can add these on the next page.
Additional Revision
+$15Frequently asked questions
4 reviews
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DJ
Dominic J.
Jun 8, 2026
Server Malware Cleanup & Security Hardening — URGENT (Ubuntu 22.04)
We had a huge server break in that had clearly been a slow burining well tought out long-con style targeted attack which we believe started in April to June 2025 and finally had the START button hit about 2 weeks ago. Svetozar has been a phenomenal person to work with. His dedication to getting the job done right vs worrying about hours spent etc is honorable. He is now our go to guy on here for any other help we need. I highly reommend working with this man over any other person on Upwork. Truly amazed by his skills, ethics and communications skills because he also not only kept me up to date with everything, but he patiently and pain stakingly I'm sure, helped me understand everything. He also then gave an extremely in depth and very technical incident report at the end of the project which we are now using to further understand and secure our server.
I cannot thank him enough, I feel we've even made a good friend. Well done and thank you for all your amazing work. You truly did save us from an attack that could have destroyed our business.
I cannot thank him enough, I feel we've even made a good friend. Well done and thank you for all your amazing work. You truly did save us from an attack that could have destroyed our business.
PG
Pat G.
May 23, 2026
Troubleshooting Memory Issue on Windows 11 Hyper-V VM running Jupyter Notebooks
Svetozar is simply awesome. He knows the Windows environment exceptionally well - especially as they apply to virtual machines. He did a great job of tuning/navigating the insides of the Microsoft world - including all the "wonderful" quirks that make advance setups in Microsoft a headache. This contract was the second time I hired Svetozar. I look forward to working with him in the future.
PG
Pat G.
May 14, 2026
Troubleshooting Memory Issue on Windows 11 Hyper-V VM running Jupyter Notebooks
Svetozar is a true expert with a very practical approach to solving problems. He is systematic in his analysis and transparent at each step. I will definitely be keeping him as my "go-to" problem solver.
MF
Marc F.
May 7, 2026
VMWare ESXi 5.5 STS Certificate Fix
Svetozar is amazing! He solved a problem for me that many others could not. He is very patient and very knowledgeable!
About Svetozar
Infrastructure & Security Specialist | Linux, VMware, Cybersecurity
100%
Job Success
Belgrade, Serbia - 1:53 pm local time
I help businesses investigate security incidents, recover compromised Linux and WordPress environments, harden infrastructure, stabilize production systems, and resolve complex hosting, virtualization, and server issues.
My experience includes:
✔ Security incident response & malware remediation
✔ WordPress malware removal & website recovery
✔ Server hardening & security auditing
✔ SSH, access control & authentication hardening
✔ VMware & Hyper-V virtualization
✔ Windows Server administration
✔ Linux systems administration
✔ Oracle Database administration & troubleshooting
✔ Infrastructure troubleshooting & performance analysis
✔ RAID, storage & recovery diagnostics
✔ VPS, dedicated server & hosting environments
✔ Backup & disaster recovery support
✔ PowerShell & Bash automation
✔ Email, DNS & server migrations
✔ Monitoring, stability & capacity planning
Recent projects include security incident response and malware remediation across 155+ WordPress websites, Hyper-V VM scaling and performance stabilization, RAID recovery diagnostics on HPE servers, Linux/WHMCS migrations, Oracle environment troubleshooting, mail infrastructure troubleshooting, and production environment recovery.
I focus on identifying root causes quickly, minimizing downtime, and delivering practical, production-ready solutions for critical systems and business infrastructure.
Steps for completing your project
After purchasing the project, send requirements so Svetozar can start the project.
Delivery time starts when Svetozar receives requirements from you.
Svetozar works on your project following the steps below.
Revisions may occur after the delivery date.
Issue review and environment analysis
I will review the provided error messages, Oracle environment details, and system configuration to identify possible root causes.
Oracle troubleshooting and diagnostics
I will perform troubleshooting and diagnostic analysis for listener, TNS, SQL, or connectivity-related issues.