System Administration is a skilled job that requires expertise and reliability. A System Administrator takes care of the operations, maintenance and enforcement of a computer/information systems network, server and applications for clients. Improving performance, security and stability of the system are integral parts of their job. They also have to handle software upgrades or the installation of new hardware, and will provide guidance, technical support, and training to users.

For most organizations, be it large companies or small businesses, System Administration is absolutely essential in keeping their day-to-day operations running smoothly. This is because they need someone with the technical expertise to manage, maintain and keep their computer networks functioning properly.

Here’s some projects that our expert System Administrator made real:

  • Network setup
  • Security configuration & monitoring
  • Vulnerability & security audit
  • Server installation & maintenance
  • Troubleshooting & error rectification
  • Software upgrade & installation
  • Database backup & restoration
  • Performance optimization

In today’s digitally driven world, it is no surprise why System Administrators are in such demand. They are a reliable resource for organizations who want professionals who can handle operations both smoothly and efficiently. Companies now have no choice but to set aside a budget for hiring System Administrators – even if it means going digital and finding one on Freelancer.com.

At Freelancer.com, we understand how important it is for you to have qualified professionals working on your projects. We also understand that you may not always have the capacity or budget to hire one full time – this is why you should consider looking intoFreelancer.com where you can find quality System Administrators with different levels of experience in your area at an affordable price. Whether its a short term or long term project, our System Administrators will be up for the task anytime!

Now that you know how important it is to have an expert System Administrator working on your business’s IT systems, we invite you to post your own project on Freelancer.com and hire an experienced professional today!

165,416 értékelés alapján az ügyfelek 4.85 / 5 csillagot adtak System Administrators szabadúszónknak.
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    IPv6 Configuration on PowerMTA 4.0 2 nap left
    HITELESÍTETT

    I'm in need of a professional who can assist with a preferred IPv6 configuration on PowerMTA 4.0. Here's a bit more about the project: - The system that's running PowerMTA is a Virtual Private Server. - I'm currently using PowerMTA 4.0, which needs to be configured to prefer IPv6. The ideal freelancer for this project would be: - Skilled in system administration - Familiar with IPv6 configurations - Experienced with PowerMTA, specifically version 4.0 - Knowledgeable about working with virtual private servers This configuration should be handled with minimal disruptions to the server. Please ensure you're confident in your ability to meet these needs before bidding. Thank you.

    €27 (Avg Bid)
    €27 licitátlag
    2 árajánlat

    I am in need of a Packet Tracer expert to architect a small project that includes a firewall, DMZ, and DHCP server. Desired Firewall Abilities: - It must have intrusion detection capabilities. - VPN support is also essential. Firewall Connectivity: - The solution will be tailored for less than 10 devices. DMZ Serving Capabilities: - A web server will be hosted within the DMZ. Ideal Candidate: - Skilled in network design using Packet Tracer. - Knowledgeable about firewalls, specifically features like intrusion detection and VPN support. - Experience in setup and maintenance of DMZ hosting web servers.

    €32 (Avg Bid)
    €32 licitátlag
    19 árajánlat

    I'm looking for assistance with IT support tasks, specifically setting up hardware or software on my various devices. Responsibilities Include: - Setting up hardware such as computers (desktops/laptops), network devices (routers/modems/switches), and peripherals (printers/scanners) - Installation of software - Configuration of devices for optimal performance Ideal skills for this job include: - Strong understanding of IT support principles - Proficiency in setting up computers, network devices, and peripherals - Experience in software installation and configuration - Ability to troubleshoot technical issues - Good communication skills If you're a reliable IT support professional with experience in setting up a range of devices, I'd love to hear from you.

    €15 / hr (Avg Bid)
    €15 / hr licitátlag
    33 árajánlat
    IPv6 PowerMTA setup 2 nap left
    HITELESÍTETT

    Hello Freelancers, I have successfully installed PowerMTA for IPv6, and the setup was completed without encountering any errors. However, when testing emails using the Gmass SMTP tester, I encountered an error stating "ERROR: Invalid URI: Invalid port specified." I suspect that this issue may be related to the configuration file and possibly the network settings as well. I am attaching my configuration file for analysis.

    €23 (Avg Bid)
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    3 árajánlat

    Daily tasks 5 days a week and possible on call if major issue Must understand linux, iptables, networking vpn, hosting, cpanel, plesk, website building, maintenance tasks, ideally python and php al round experience Must be able to work efficiently and be able to act on issues quickly and fix issues before they come a bigger issue. Eyes open at all times. Let me know what you can do and best price you can work for. in your bud proposal. Auto bids will be ignored

    €143 (Avg Bid)
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    38 árajánlat
    VPS Hosting Migration Expert Needed 2 nap left
    HITELESÍTETT

    I'm in need of a professional who can help me migrate my VPS hosting to another provider. Your experience in this area is crucial to the success of this project. Key Responsibilities: - Migrate all data and configurations from the current VPS hosting to the new provider - Ensure minimal to no downtime during the migration process - Verify the successful transfer and hosting functionality post-migration Ideal Skills and Experience: - Proven experience with VPS hosting migration - Extensive knowledge of various VPS hosting providers and their systems - Strong problem-solving skills to overcome any migration hurdles - Excellent communication and ability to provide clear status updates Please include your experience in your application. The successful applicant will be expected to hand...

    €7 / hr (Avg Bid)
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    24 árajánlat

    **Job Title: Freelance DevOps Engineer** **Location: Remote** **Job Type: Freelance** **Introduction:** We are seeking a highly skilled and experienced Freelance DevOps Engineer to join our dynamic team. This role is ideal for someone passionate about automating and improving development and production environments, and freeing up developers from the complexities of DevOps tasks. Your expertise in AWS, containerization, orchestration, continuous integration, and continuous deployment will be pivotal in our operations. **Key Responsibilities:** - Design, implement, and manage CI/CD processes and pipelines. - Deploy, automate, maintain, and manage AWS cloud-based production systems to ensure availability, performance, scalability, and security. - Problem solve and troubleshoot production iss...

    €33 / hr (Avg Bid)
    €33 / hr licitátlag
    75 árajánlat

    Seeking immediate assistance from a capable Cyber Security expert to address my current needs. My project revolves around two main components: 1. Network Security: I am in the pursuit of a specialized professional who understands the principles of network security and can help me gain access to a system in an ethical manner. This requires a deep understanding of network infrastructure and protocols, as well as the skills to spot and mitigate vulnerabilities. 2. Data Encryption and Secure Coding: You will need to exercise knowledge of data encryption standards and secure coding practices to ensure that the integrity of the system is maintained, while the necessary tasks are performed. Skills and Experience: - Proficient in ethical hacking - Solid experience with network security - Robust...

    €47 / hr (Avg Bid)
    €47 / hr licitátlag
    9 árajánlat

    I'm seeking urgent improvements for my MailEnable (v.10.48) email server. The project involves making the system both faster and more secure. Key Responsibilities: - Enhancing the system's performance for optimal speed and efficiency - Implementing security upgrades to ensure the entire system is robust and secure Task - install certificate into mailserver, - allow mail-client to use it which all protocols (POP/IMAP/SMTP), - server security (local fw) - SPF (Sender Policy Framework) - timeout of webmail access (it seems that now a session is unlimited) - customization of webmail: if the mail server is configured to answer to more than one domain, how is possible to adopt a different login page? Experience and Skills: - Proven track record in email server optimization, prefe...

    €158 (Avg Bid)
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    10 árajánlat

    I Have Citrix XenApp 7.18 installed in my test environment everything working ok using Citrix workspace and receiver application what I am looking for Configure Citrix XenApp to enable users to access Citrix Receiver from the web using HTML5 technology, without the need for a Citrix Gateway appliance.

    €152 (Avg Bid)
    €152 licitátlag
    9 árajánlat

    I need an expert to plan, scale, and execute the setup of a Windows Terminal Server to accommodate 50-70 users. The task is expected to be completed within 1 - 3 months for 10-20 hours per week. Key Responsibilities: - Plan and execute the setup of a Windows Terminal Server for 50-70 users. - Ensure the server is scalable for potential future growth - Implement best practices to guarantee system performance and security - Provide guidance on user access and permission management Ideal Skills and Experience: - Prior experience in setting up Windows Terminal Servers for medium to large user bases - Strong understanding of Windows Server and Terminal Services - Proficiency in planning and executing Windows Server setups - Ability to optimize system performance and scalability - Familiarity...

    €22 / hr (Avg Bid)
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    19 árajánlat
    Linux Server Administration for AWS 2 nap left
    HITELESÍTETT

    I'm looking for a Linux server administrator with experience in AWS to help maintain and update. Key Responsibilities: - Regular maintenance: We need someone to ensure all the servers are running smoothly. This includes troubleshooting any performance issues and addressing them promptly. - Updates: Keeping all software, including the Linux systems and other server software, up-to-date is crucial for security and performance. We are looking for a Linux server administrator with expertise in AWS to manage our server infrastructure. The responsibilities include ensuring the smooth operation of the servers and addressing any issues that may arise within our custom-built system. We will provide comprehensive knowledge and training about our system. The workload is expected to be minimal,...

    €89 (Avg Bid)
    €89 licitátlag
    27 árajánlat

    I'm seeking an experienced network engineer to redesign my small office/home network. The main issue is limited network coverage. I'm also looking for an optimal setup that facilitates both system and WAN failover. Key tasks: - Assess current network usage and structure, with 10-20 devices, mainly computers and laptops. - Design an optimized network layout to extend coverage. - Implement a robust solution for system and WAN failover. The ideal candidate would have experience in network management, problem-solving skills, and expertise in setting up failover systems.

    €40 (Avg Bid)
    €40 licitátlag
    8 árajánlat
    Apple Mac OS Reinstallation Support 2 nap left
    HITELESÍTETT

    ❌YOUR BID IS THE BUDGET ! Done today zoom meeting !❌I require assistance with the reinstallation of Mac OS High Sierra. I've attempted all various troubleshooting steps, including contacting Apple and verifying that there are no network issues. Unfortunately, I am unable to reinstall the operating system due to technical issues. must be done today no questions ask your b Ideal skills and experience: - Proficient in Apple Mac OS system - Experience with troubleshooting technical issues associated with OS reinstallation - Knowledge of common issues and fixes for Mac OS High Sierra - Strong communication and problem-solving skills - Ability to provide clear, step-by-step instructions for resolving the issue

    €31 (Avg Bid)
    €31 licitátlag
    11 árajánlat
    Proxy-aided VPS Live Feed Boost 1 nap left
    HITELESÍTETT

    I'm in need of a skilled professional who can help me increase my video streaming viewership on the desktop with the use of proxies. I currently have a live video feed that, while engaging, is not reaching the audience numbers it needs to. The primary aim of this project is to utilize proxies in order to boost viewer count. Key requirements and tasks for this project include: - Utilizing proxies: The expert I'm looking for should be able to set up a system that uses proxies to generate more views on the feed. - VPS focus: The primary target for this project is the desktop platform. - Strategy: The ideal candidate should be able to not just set up the proxy system, but also have a strategy in place for effective viewer increase. Ideal candidates for this project should have...

    €178 (Avg Bid)
    €178 licitátlag
    16 árajánlat

    My domain is facing issues with DNS configuration, causing the website to be completely inaccessible. I'm looking for an expert in this area to help resolve the problem. Key Responsibilities: - Analyze and troubleshoot the DNS configuration of my domain. - Identify the root cause of the issue leading to the website unavailability. - Propose and implement the necessary changes to fix the problem. Ideal Candidate: - Proven experience in DNS management and troubleshooting. - Familiarity with common DNS issues, their symptoms, and resolution techniques. - Excellent problem-solving skills and the ability to work in a fast-paced environment. - Strong communication skills to explain the issues and solutions effectively.

    €60 (Avg Bid)
    €60 licitátlag
    30 árajánlat

    I need help installing on my self-hosted Ubuntu server via SSH. The server has root access and the primary purpose of this installation is for online streaming services. Key requirements: - Proficient in Linux server administration - Experienced in installing software from GitHub repositories - Familiar with Ubuntu/Debian Linux distributions Please reach out if you have experience in this area and can help with a smooth installation.

    €20 (Avg Bid)
    €20 licitátlag
    20 árajánlat

    This project is fairly simple for the right expert. I have 2 kinds of domains. a) Freshly registered domains b) existing domains with LOW or BAD domain reputation at Google Postmaster Tools I need someone to take my domains and get them to HIGH domain reputation in Google Postmaster Tools. You have to use your OWN tools. you cant use my servers for this task. you will take a domain and will deliver a HIGH reputation. I will setup the correct dns, but you cant send email from my servers. Please Bid how much you want to do each domain. your Bid must be for 1 Domain. This should be a simple and straight forward task for the right person with the right tools. I am expecting an affordable bid. I will have many domains for this on an ongoing basis and I want some one to work with long ter...

    €97 (Avg Bid)
    €97 licitátlag
    7 árajánlat

    I'm seeking a professional who can assist me in configuring DevStack on Linux-based virtual machines. The main aspects of the project are as follows: - Complete Configuration: I need the DevStack configuration to be set up comprehensively. This includes ensuring that all components are correctly configured and working as intended. - Remote Access: The virtual machines should be set up in a manner that allows me to have remote access to them. This is a crucial requirement for the project as I will need to work on them from different locations. Ideal candidates for this project should have a strong background in: - DevStack: Proficiency in configuring and setting up DevStack is a must. Previous experience in implementing DevStack on Linux-based systems will be highly valued. - Virt...

    €119 (Avg Bid)
    €119 licitátlag
    15 árajánlat

    As a business highly concerned with network security, I am seeking assistance from a knowledgeable Cyber Security consultant to fortify our network infrastructure. Skills and Experience Required: • Deep understanding of network security measures • Proficient in employing and improving Firewalls and VPNs • Familiar with Intrusion Detection Systems • Capability to assess and mitigate risk of unauthorized access and data breaches Key Responsibilities: • Analyse our existing security measures • Identify vulnerabilities and recommend enhancements • Implement improved security protocols preventing unauthorized access and data breaches • Provide continuous monitoring and regular updates.

    €39 / hr (Avg Bid)
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    34 árajánlat

    I'm in need of a skilled and experienced network engineer to assist with setting up a robust distributed network. The network will support both IPv4 and IPv6 and will be announced to various providers with BGP. This is a live network - 2x IPv4 /24's will be announced and various IPv6 blocks. I would like the following setup, using bird 2.x: - Routers that will announce the addresses to the public internet via providers (I already have the BGP sessions setup with the providers) - An internal network setup using Wireguard between routers - Ability to internally announce single IPs/smaller subnets (than a /24, for example) to route them to different places. For example, if the /24 is announced at provider A on router A, I want router B to be able to connect to router A and router A...

    €601 (Avg Bid)
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    20 árajánlat

    We are a hosting company that has a BGP network with multiple carriers. We provide VPS, Bare Metal, Webhosting, ect. I need someone with networking experience to help add IPs to our network occasionally and support customer tickets with system admin questions. MUST BE ABLE TO SPEAK ENGLISH AND HAVE OCCASIONAL PHONE CALLS WITH MANAGEMENT. Knowledge with these would be a good fit: MikroTik Routers Dell Switches Dell and HP Servers Virtualizor EasyDCIM WHMCS Linux Windows

    €493 (Avg Bid)
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    36 árajánlat

    I'm seeking an experienced IT Network specialist to carry out two main tasks for my project: 1. **Network Setup and Configuration**: I'm aiming for a wireless network that will efficiently and reliably connect between 10 and 50 devices. Skilled expertise in setting up this scale of network architecture is highly valued. 2. **Network Troubleshooting and Maintenance**: The same specialist should possess the capabilities for regular monitoring, routine maintenance, and resolve any particular technical issues that may arise. Experience in efficient problem-solving regarding network issues is a must. A comprehensive understanding of network security, and ability to implement security measures, is favourable but not a pre-requisite for the job. You should have a proven track record ...

    €151 (Avg Bid)
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    25 árajánlat

    I'm looking for a skilled professional to help me set up a Tekkit 2 server. I'm currently undecided between using a server gamepanel or setting up a dedicated Linux server. Key Requirements: - Comprehensive understanding of setting up Tekkit 2 servers. - Proficiency in configuring server gamepanels. - Flexibility to work with any server gamepanel, as I haven't decided on one yet. Your role will include: - Assisting me in deciding between a dedicated Linux server or a server gamepanel. - Setting up the chosen platform. - Ensuring smooth operation and functionality of the Tekkit 2 server. - Arranging plugins and configuration of permissions. Ideal Skills: - Experience with server gamepanels like Multicraft, Pterodactyl, or TCAdmin. - Strong understanding of Linux server se...

    €23 / hr (Avg Bid)
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    49 árajánlat
    AWS EC2 Performance Boosting 13 óra left
    HITELESÍTETT

    As a growing tech-based firm, we are eager to enhance our application's performance by employing AWS EC2's auto scaling feature. Our current system primarily involves using EC2 services. However, we are witnessing a significant surge in user traffic in recent times, having identified a high CPU utilization is the main stress parameter on our EC2 instances. This has led us to explore the possibilities of auto scaling, with a prime focus on increasing our application's performance. WE'RE SEEKING EXPERTISE IN: - AWS EC2 services and how to maximize CPU usage. - Implementing AWS EC2’s auto scaling feature. The ideal candidate for this task will have: - Demonstrable experience in AWS EC2's auto scaling and optimizing CPU resource utilization. - Expertise in m...

    €48 (Avg Bid)
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    28 árajánlat

    I need an expert who can swiftly and efficiently upgrade my existing Windows Server 2012 to Windows 11. Considering the urgency of the project, I'd prefer professionals who can get started immediately and complete the task at their earliest. Though the primary function of the server is unknown, the professional should be well-versed with handling and preserving all potential features of the server. Ideal Skills: * Experience in computer systems networking and IT server management * Proficiency in Windows Server 2012 and Windows 11 * Ability to work under strict deadlines Please note the project needs to be completed ASAP. Before getting started, kindly provide some references or past work evidence of similar migrations and ensure minimal server downtime during the transition.

    €18 / hr (Avg Bid)
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    17 árajánlat

    i need a person with the following have deep debian knowledge know how to setup a cron service know how to setup log rotation know how to deploy a laravel 11 application Must work via anydesk If you can talk via zoom while working it will be better

    €54 (Avg Bid)
    €54 licitátlag
    47 árajánlat

    I need a skilled developer with a deep understanding of SMTP Mautic VPS for a time-sensitive task. Key Requirements: - Expertise in setting up and configuring SMTP Mautic VPS port 25 open - Proficient in deploying and managing automated email campaigns - Ability to ensure optimal deliverability of email campaigns - Knowledge of best practices to avoid email going to spam This is an urgent project and I'm looking for someone who can deliver quality results quickly.

    €47 (Avg Bid)
    €47 licitátlag
    8 árajánlat

    We use at this moment Open VPN server for: 1. user class I wich can acces all internal network resurces, through open vpn tunnel (domain admin) 2. user class II wich can acces limited resources on internal network, through open vpn tunnel (domain usser) 3. user class III, its company clients wich connect to a server in the internal network, limited to an acounting application, wich are working as client-server. Basically we have on internal network a virtual windows server wich are hosting this accounting application in server mode, and the clients have a desktop accounting application (acting as a client) wich are connecting through open vpn tunnel to the virtual windows server IP. The important is that the desktop application acting as a client, in the connection setting ask the IP and...

    €249 - €748
    Kiemelt Rejtett
    €249 - €748
    11 árajánlat

    I have an urgent need for someone to review and standardize my Aruba 9012 controller's configurations. The main aspects of the Aruba controller that need to be verified and standardized are: - Network settings - VLAN configurations - Access control policies - Heat maps This project is time-sensitive, requiring completion ASAP. Ideal candidates must have: - Proven experience with Aruba wireless controllers - Strong knowledge and experience in network settings and configurations - Ability to understand and optimize access control policies - Experience with heat map configurations - Ability to work quickly and efficiently to meet the ASAP deadline. Your expertise and quick execution is crucial. Please reach out if you're confident in your ability to complete this task to a hi...

    €16 / hr (Avg Bid)
    €16 / hr licitátlag
    8 árajánlat

    I'm looking for an expert to quickly upgrade my existing Windows server to Windows 11. The main reason for this transition is to ensure compatibility with new software, even though the specific software necessitating the upgrade hasn't been specified. The ideal freelancer for this task should have the following qualifications: - Extensive experience with Windows server upgrades - Knowledge of compatibility issues and tactics to resolve them - Ability to work under tight timelines as this project needs to be concluded ASAP. Your proposal would be more favorably considered if you can detail similar past projects you've completed, and their outcomes.

    €10 / hr (Avg Bid)
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    14 árajánlat

    I'm currently seeking an experienced Linux system administrator to connect my Ubuntu-based Digital Ocean server to a Pterodactyl panel. Your tasks for this project, ideally completed within a short timeframe, will include but are not limited to: - Seamless connection of the server to the Pterodactyl panel. - Full preservation of existing user profiles on Pterodactyl during the process. What you should ideally have: - Proven experience in Linux System Administration, particularly with Ubuntu. - A solid understanding and hands-on experience with Pterodactyl panels. - Capability to process tasks with full root access. It's crucial that you know exactly what is required to ensure a secure and functional connection. Also, you should be able to solve any unforeseen issues that migh...

    €15 (Avg Bid)
    €15 licitátlag
    5 árajánlat

    I described the error below in details. I'm sure the Server administrator can fix this issue in 1~2 hours. I'll pay $100 for this project. 1. I generated 2 csr files with command. openssl genrsa -out ~/certs/ 4096 openssl req -new -sha256 -key ~/certs/ -out ~/certs/ openssl genrsa -out ~/certs/ 4096 openssl req -new -sha256 -key ~/certs/ -out ~/certs/ 2. I got 2 swish certificates file from swish portal. I used one for singing and another for TLS communication between web system and swish platform. 3. I created p12 file from the reference. openssl pkcs12 -export -out -in -inkey 4. I used the following code. <?php $date = new DateTime(); $dateString = $date->format('Y-m-dTH:i:sZ'); $payload = [ "payoutInstructionUUID" => "...

    €36 / hr (Avg Bid)
    €36 / hr licitátlag
    39 árajánlat

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