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6.6
6.6
100%

Mohali, India
$50 USD per hour
19 Years experience as Linux/Unix Admin, System/Storage/Server Admin, Virtualization Expert => Install and troubleshoot anything on Linux/Unix, Windows => Centos, RHEL, Ubuntu, Debian, Cloudlinux, Windows => Backup, Recovery, System boot and kernel issues => Server Security and Hardening: FIREWALLD, UFW, IPTABLES, Selinux, Fixing Security vulnerabilities => User, Disk, File Management,Linux Networking/Routing, ISCSI, Multipath, LVM, Partitions => Servers: Cisco, HP, IBM, Dell, Supermicro => Hardware and Software RAID, SAN/NAS Storage => Virtualizor, KVM, Xen, ESXI, VirtualBox, VMware, Vcenter Converter => Apache, Nginx, Mysql, RDS, SSL including Letsencrypt, cPanel, Webmin, Plesk => AWS, GCP, Digital Ocean => NTP, SSH, SQUID, DHCP, BIND, Postfix, Sendmail, VNC, Kannel, HA-Lizard, DRBD, XCD-NG, RSYNC, ISCSI, Multipath, NFS, VSFTPD, Samba => WHMCS, Opencloud, Nextcloud, Zulip, OpenVPN, Polr, Odoo, Advandate, Openmeetings, TOR, Keycloak, Rocket chat, Opencanary, eSignForms, Apache Nifi
7.9
7.9
99%

Hetauda, Nepal
$50 USD per hour
Let's keep this short. Anything related to IT: (System/Network/DevOps/Virtualization/Wordpress/Development/Servers/Mail) I can handle them all, period. Ganesh D.

7.5
7.5
100%

Basti, India
$40 USD per hour
Certified Server & Cloud Architect with 15+ years of strong hands-on experience in designing, managing and optimizing IT infrastructure across multi-cloud environments. Expert in AWS, Oracle Cloud (OCI), Azure, Google Cloud, DigitalOcean along with Linux, UNIX, Windows, VMware and OpenStack. Strong experience in Oracle Apps, databases and enterprise IT services. Certified AWS Cloud Architect Professional and Generative AI certified for AWS and Oracle Cloud (OCI), with hands-on experience in AI model deployment, cloud-based AI infrastructure, automation using AI tools and integrating AI services with cloud platforms. Strong experience in application development and production-ready deployments including eCommerce platforms (Magento, WooCommerce, Shopify etc), WordPress, PHP-based applications and custom web solutions. Specialized in end-to-end setup from development to production, including CI/CD pipelines, scaling, security hardening and high availability architecture. Expert in Cloudflare setup, CDN configuration, WAF implementation, firewall security and protection against DDoS and web attacks. Strong experience in production-grade email server setup and deliverability including DKIM, DMARC, SPF, RBL, spam filtering and secure mail flow configuration. Expert in cloud architecture, setup, configuration and high-level infrastructure design for scalable and secure environments. Strong expertise in IT cost optimization, improving performance, reducing cloud billing and ensuring best utilization of resources. Expert in troubleshooting live production issues, server failures and cloud problems with proper RCA and quick resolution. Extensive experience in migrations including servers (Linux/Unix/Windows), websites, applications, databases (Oracle, MySQL, PostgreSQL, MongoDB) and mail systems like Zimbra, Exchange, Office 365, cPanel, Plesk and more. Experienced in network security, firewall setup, vulnerability assessment and securing infrastructure against cyber threats. Hands-on experience with DevOps tools like Jenkins, Terraform, Ansible, Prometheus and Grafana for automation and monitoring. Strong experience with hosting panels like cPanel/WHM, Plesk, DirectAdmin, ISPConfig, Webmin, Virtualmin and others. Worked on monitoring and management tools like Nagios, Cacti, Zenoss and other enterprise solutions. Certified RHCE, RHCSA, RHCVA, OpenStack, Oracle Cloud (OCI) Professional and Mirantis Cloud certified. Expert in Active Directory, Microsoft Exchange and Windows server environment setup, migration and management. I believe in delivering reliable, scalable and production-ready solutions with strong security and proactive support. AS AN ENGINEER, I BELIEVE NOTHING IS IMPOSSIBLE TO IMPLEMENT. In addition to this, I look forward to working on your projects in your budget.

5.8
5.8
96%

Riverwood, Australia
$25 USD per hour
I am an expert in - AWS including autoscaling, high availability, data transfer - Blockchain infrastructure setup - Moodle hosting, management, administration - Cloud infrastructure - Install and configure Elasticsearch, Kibana, Logstash, Beats, APM - Linux administration (Ubuntu, Redhat, CentOS, SUSE, Kali, Debian, etc.) - Automation using Ansible - MySQL, MySQL Cluster administration, migration, backup/restore - PostgreSQL administration, migration, backup/restore - Cryptography - SSL, certificate, public-key infrastructure, cryptography - Oodo ERP, NextCloud - cPanel, Plesk - Optimise WordPress performance, Joomla, Drupal - Acronis, Splunk, security - FreeRadius (RADIUS) - Ethical hacking And many other stuff in technology. Please reach out to me if you need any help with regard to information technology issues.

6.5
6.5
100%

Cherpulacherry, India
$15 USD per hour
We're a team that has over 11 years of experience in the field of system administration. We work 24/7 to help you with your server/hosting issues. When you deal with us, you can expect honesty from us. We do not commit on any jobs which we are not familiar with or have done in the past. If there is something which is new to us, we will make sure we do it on a test environment before doing it for you. Areas in which we can help include, but not limited to : 1) AWS 2) Centos / Redhat / Ubuntu / Debian flavours 3) Hosting related issues 4) cPanel / Plesk / Directadmin / Virtualmin /Webmin / Usermin / Centos web panel 5) Virtuozzo / VMware / OBAS / OpenVZ 6) Server Migrations 7) Detailed troubleshooting of Linux services 8) Monitoring services such as Zabbix, Nagios Certifications which we posses include : * RHCE * AWS Sysops * AWS cloud practitioner * cPanel technical certifications * VMware, VCA and VCP

7.9
7.9
100%

Villa De Merlo, Argentina
$25 USD per hour
I started with BeOS in 2002, because of a friend, who showed me something other than Windows, Always I worked repair PC & Laptops. Now I have more 10 years of experience in Server Linux. I can manager servers dedicated, servesr VPS, servers shared, etc. Setup and management you server; Apache/Nginx/Tomcat. SMTP Postfix, POP/IMAP Dovecot. FTP Vsftpd, Proftpd, Pure-ftpd-mysql. Dns Bind9, dnsmasq. File Server & printer Samba (dc-ac). Network administrator: isc-server-dhcp, openvpn, etc. Install and renew SSL certicate. All services on cloud; AWS, Azure, etc. Also website and E-mail migrations. ALL panels and web managers. Management all Linux distributions. Setup, security and optimization your server. __________________________ VERY IMPORTANT!!! “Hi I'm Matias, someone is trying to impersonate me, this account is the only one active and verified by freelancer! I DON'T USE ANY OTHER MEANS OF CONTACT, ONLY FREELANCER CHAT!” -----------------------------------------

6.6
6.6
95%

Mohandeseen, Egypt
$40 USD per hour
I design and build high-availability, production-grade infrastructure for SaaS platforms, hosting providers, and enterprise systems. With 20+ years of hands-on experience, I help businesses deploy scalable, secure, and cost-efficient systems using Proxmox, Kubernetes, and cloud platforms like AWS & Azure. In addition to infrastructure, I work as a Full-Stack Engineer, building and scaling SaaS applications end-to-end — from frontend dashboards (React / Next.js) to backend APIs (Node.js / Python), and data architectures using PostgreSQL, Redis, and analytics engines. I specialize in solving complex system challenges across both application and infrastructure layers — from designing complete cloud-native platforms to optimizing performance, data pipelines, and fixing critical production issues under pressure.

8.0
8.0
99%

Kremenchuk, Ukraine
$10 USD per hour
I have 17 years experience with linux,freebsd,cisco. Cisco ASR1001, ASA 5505,5510, 29xx,19xx,3560,45xx.,8300,9300 Programming on Perl,Bash,PHP.

8.0
8.0
98%

Visakhapatnam, India
$25 USD per hour
AWS Certified Solutions Architect with more than 12 years of system admin experience. We Provide Business Solutions such as - Custom Wordpress Websites - Laravel and CodeIgniter websites creation and modification - Super fast website migrations (Wordpress, Moodle, Magento etc.) - DNS related issues and Email migrations (imap to imap, office365 to Gsuite etc.) - Installation of all panels (cpanel, centoswp, vestacp, cyberpanel, plesk, openlitespeed etc.) - Advanced AWS Architecture consultation/implementation and Google Cloud , Microsoft Azure, Alibaba Cloud, Digital Ocean and Linode server deployments - Troubleshooting Websites/servers (linux) - Git implementation / integration with existing software flow - Python GUI Applications/ Web Scraping Our completed projects speak of our skills and feedback from the employers showcase our ability to deliver on time, every time. "Never Hire for Skills. Hire for Passion. Skills are cheap, Passion is hard to come by"
A CentOS expert is a Linux systems specialist who installs, configures, secures, and maintains servers running CentOS or its successors such as Rocky Linux and AlmaLinux. CentOS experts on Freelancer.com handle everything from initial server provisioning to long-term system administration, ensuring that production environments stay stable, secure, and performant. With CentOS having reached end-of-life and many organizations migrating to compatible RHEL-based distributions, demand for skilled CentOS consultants covers both legacy maintenance and modern migration projects.
A freelance CentOS administrator takes ownership of the Linux server layer so your applications run reliably. That includes building servers from a fresh ISO, hardening them against intrusion, tuning kernel parameters, configuring services, automating updates, and troubleshooting outages when something breaks at two in the morning.
The commercial value is straightforward. A properly configured CentOS server reduces downtime, lowers hosting costs through efficient resource use, and prevents the security incidents that come from misconfigured firewalls, weak SSH policies, or unpatched packages. Hiring a specialist gets you decisions made by someone who has rebuilt the same stack dozens of times.
CentOS specialists handle a wide spectrum of server-side work. Typical engagements include:
A capable CentOS consultant is fluent across the Red Hat ecosystem and adjacent open-source tooling. Expect proficiency with systemd, firewalld, SELinux, Cockpit, and the dnf and yum package managers. On the application layer, that extends to Apache HTTPD, Nginx, MariaDB, PostgreSQL, Redis, Memcached, and Tomcat.
For automation and infrastructure, look for hands-on experience with Ansible playbooks, Terraform for cloud provisioning, Git for version control, and monitoring stacks such as Prometheus, Grafana, Nagios, or Zabbix. Cloud familiarity with AWS EC2, Azure Virtual Machines, Google Cloud, DigitalOcean, and Linode is standard for modern CentOS engagements.
CentOS has long been a default in environments where stability matters more than novelty. You will commonly find freelance CentOS administrators working with:
Strong CentOS freelancers show a clear track record of production Linux administration, not just hobbyist familiarity. Look for years of hands-on RHEL-family experience, comfort with the command line under pressure, and a portfolio that includes migration projects, security hardening engagements, or sustained server administration contracts.
Useful credential signals include Red Hat Certified System Administrator (RHCSA), Red Hat Certified Engineer (RHCE), LPIC certifications, and cloud certifications from AWS, Azure, or Google Cloud. Beyond paper, scan their profile for past reviews mentioning uptime, response times, and incident resolution.
Sample interview questions you can use directly:
Freelancer.com gives you access to a global pool of Linux system administrators, DevOps engineers, and CentOS consultants across every timezone, so urgent server issues can be picked up around the clock. You can review verified profiles, past project history, client ratings, and certification badges before shortlisting.
Clients set their own budgets and receive competitive bids, meaning pricing reflects the actual scope of your project and the experience level you want to engage. Milestone Payments protect funds until deliverables are accepted, and built-in chat keeps technical communication, configuration notes, and credentials exchange centralized. Whether you need a one-hour fix or a months-long migration program, you will find freelancers on Freelancer.com ready to bid.
Whether you are patching a legacy server, migrating off end-of-life CentOS, or building a new RHEL-compatible stack from scratch,
Hiring the right CentOS specialist comes down to writing a precise brief, reading bids carefully, and weighing profile evidence before you award. The process below works whether you need a one-hour fix or a long-term server administration contract.
Your brief determines the quality of bids you receive. A clear, technically specific project description filters out generalists and attracts CentOS specialists who can actually deliver. Head to the
Bids are short proposals that reveal how each freelancer interprets your brief. A strong CentOS bid does not just quote a price; it shows the candidate understands the failure mode or migration path you are describing. Read each proposal as a technical conversation starter, not a checkout line.
The final decision combines proposal quality with profile evidence. Look at the full picture: portfolio depth, client reviews mentioning Linux and CentOS work, completion rates, and any RHCSA or RHCE certifications listed. Consistency across many past projects matters more than one impressive example.
CentOS Linux 7 reached end-of-life in June 2024, and CentOS 8 ended earlier. Most CentOS workloads are now being migrated to Rocky Linux, AlmaLinux, Oracle Linux, or Red Hat Enterprise Linux, all of which are binary-compatible. A CentOS expert handles both ongoing maintenance of legacy systems and the migration to a supported successor.
Yes. Many CentOS engagements are short, scoped tasks such as fixing a broken Apache configuration, recovering from a failed kernel update, patching a security vulnerability, or installing an SSL certificate. You can post a single-task project and have it bid on within hours.
A general Linux administrator works across distributions, while a CentOS expert specializes in the Red Hat family of tools including dnf, yum, SELinux, firewalld, and the specific package versions and behaviors of CentOS, Rocky Linux, and AlmaLinux. For RHEL-compatible environments, the specialist will move faster and make fewer distribution-specific mistakes.
If the work is server administration, hardening, troubleshooting, or migration, a CentOS specialist is the right fit. If the project also involves CI/CD pipelines, container orchestration, infrastructure as code at scale, and cloud-native architecture, look for a DevOps engineer who lists CentOS or RHEL among their core competencies.
Because Freelancer.com has talent across every timezone, response times for urgent server issues can be measured in minutes once you post the project. Mark the project as urgent in your brief and you will typically see bids from available specialists very quickly.

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