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On average, 130 CentOS projects are completed every quarter on Upwork.

130

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Average CentOS Freelancer Feedback Score

CentOS Upwork freelancers typically receive a client rating of 4.85.

4.85
Last updated: August 1, 2015
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  1. Max Topal

    Max Topal

    VoIP/Network/Linux Engineer

    Russia - Tests: 3

    Over 8 years hands-on experience. I have deep knowledge on VoIP Hardware and softswitches from open-source one (Asterisk, Elastix, Askozia, Freepbx, CallBox, Trixbox, Welltime, Yeastar) to licensed (Switchvox, Panasonic, Mera, RTU) . I am providing Asterisk-based PBX installation\integration, support, troubleshooting and consultations. Fully manage the installation, configuration and troubleshooting of Linux servers * Install and configure Web Servers and MySQL, PostgreSQL * Install and configure customer scripts and programs * Monitor performance to identify and resolve issues using a suite of systems and tools. * Provide VoIP Security * Troubleshoot and resolve network, system, hardware and software problems. * Achieve quick fixes and / or long-term solutions as needed. I have more than 100 successful IP-PBX server deployments, so I am confident that you will be satisfied with my work completely.

    $20.00 /hr
    0 hours
    0.00
  2. Artem Lalaiants

    Artem Lalaiants

    Linux System Administrator

    Ukraine - Tests: 3 - Portfolio: 2

    I'm a highly competent and organized Linux System Administrator with more than 4 years of experience in Linux Administration, hosting environment and maintenance of production and development servers. In-depth knowledge in management and configuration of Linux based servers, development of HA systems and security policies. Fascinated with automation of processes in shell and Python. - Linux maintenance (CentOS, Debian, Ubuntu, CoreOS, RHEL); - Cloud hosting (Amazon EC2, RDS, S3, DigitalOcean Droplets); - Virtualization: (VirtualBox, Vmware, Openvz, Xen); - Web servers (apache, nginx); - Databases (MySQL, PostgresQL); - Monitoring (zabbix, nagios) - Mail servers (postfix, sendmail, antispam/ antivirus: clamav/spamassassin/amavis, courier, dovecot); - Networking (DHCP, DNS, VPN, OpenVPN, firewalls: iptables/ipfw, qos, proxies); - Python programming. Graduated from V.N. Karazin Kharkiv National University, Kharkiv, Ukraine, Department of Complex Information Technologies. Have a master's degree.

    $10.00 /hr
    0 hours
    0.00
  3. Donovan F.

    Donovan F.

    Cloud Engineer and Linux Expert

    South Africa

    I am an accomplished Systems Administrator with over 13 years professional experience building infrastructure and platforms for small web hosts, the enterprise data center and the cloud. My primary specialties are Linux systems, open source software, and cloud platforms. I began my career integrating Linux systems and varies opensource technologies for Internet Service Providers and Telecommunications providers. I realized that integrating programming/scripting into my skill set would automate and provide easy of implementation to many of my projects. Here is a brief sampling of skills and technologies I am currently (2015) working with: Linux - RHEL, CentOS, Ubuntu, and FreeBSD Datastores - MySQL, PostgreSQL, Memcached, Redis, MongoDB Monitoring - Nagios, Munin, Cacti, Shinken Management - Chef, Puppet Platforms - AWS, Rackspace, OpenStack Frameworks - Rails Lanaguages - Ruby, Python, Perl, PHP SCM - Git, SVN

    $27.78 /hr
    6 hours
    0.00
  4. Muhammet Berdimyradov

    Muhammet Berdimyradov

    Systems and Storage Administrator

    Turkmenistan - Tests: 2

    My primary job - management of data-center infrastructure of mid-sized service provider. I operate a farm of the Sun/Oracle/HP/HDS servers, storage systems and Brocade SAN, work with a stack of the Solaris/Linux/Windows operating systems, implement vmWare vSphere virtualization solutions in production. Here at Odesk I plan to expand my knowledge base and get an additional experience in Linux/Unix operating systems and also in programming.

    $10.00 /hr
    0 hours
    0.00
  5. Oleg Cataraga

    Oleg Cataraga

    Network / System Engineer

    Canada - Tests: 2

    I have an experience of 7 years in Networking and System Administration. Strong knowledge in administrating Unix like operation systems and Windows OS. Good knowledge in Bash scripting Experienced in RF equipment. My knowledge and critical thinking, along with the experience gained over the years, have always helped me to find a fast and reliable solution for any issue occurred. I possess knowledge in: - Cisco switching and routing - Satellite Networking, VSAT - UNIX administration and Bash scripting - VMware ESX managing via CLI - Automation using TestShell and Ranorex - Windows Server, PowerShell - Ixia traffic generator using IxLoad and IxExplorer - VoIP technology, Asterisk server, SIP, RTP

    $10.00 /hr
    0 hours
    0.00
  6. Oleg Dukh

    Oleg Dukh

    System Administrator/IT Engineer

    Ukraine - Tests: 1 - Portfolio: 5

    Experience: OnApp L3 Support Engineer June 2013 – Present (1 year 9 months)Ukraine Provide 3rd line technical support to customers. Analyze and clarify customer queries though troubleshooting and researching existing knowledgebase articles/known issues. Diagnose the root cause of customer technical issues and resolve wherever possible in real time Setting up and configuring OnApp Clouds(Control Panels,Hypervisors,BackUp Servers,DataStores,CDN,Virtual Servers etc). Webmaster(Part-time) Freelancer January 2009 – Present (6 years 2 months)Lviv Worked in various number of web based Projects using Joomla, Wordpress, HTML, CSS, JavaScript etc. Template Customization depending on the clients' website requirements Websites deployment using open source toolset (PHP, MySQL, Apache, Linux and others (i.e LAMP), Debugging of code written by other developers. Search engine Optimization included creating unique title tags, meta tags (descriptions and keywords), internal navigation (footer text links, content links), and optimization of content. Ericpol Computer Systems Engineer September 2012 – May 2013 (9 months)Lviv Monitoring and updating Tickets (issues) through Incident management system based on ITIL Process; Configuration, operation and maintenance of telecommunication and Ethernet equipment; Maintaining information security in the organization; Configured and Administrate Linux servers and Desktops; Installing and configuring new hardware and software; Maintenance of office equipment; Identify and troubleshoot workstations, and more; Ukrainian Catholic University Engineer of IT Departament January 2008 – September 2012 (4 years 9 months)Ukraine Configured, installed, and troubleshoot desktop computers, peripherals, including installing and configuring the OS, internal components, peripherals and software; Diagnosed and resolved hardware, software, and network connectivity problems; Provided technical assistance for troubleshooting and configuration needs;

    $12.00 /hr
    0 hours
    0.00
  7. Bila O.

    Bila O.

    Java EE / Android developer

    Ukraine - Tests: 1

    I have over 2.5 years experience in Java EE and about 1.5 years in Android. Lately have worked with: Java/J2EE, Spring (IoC, MVC), Hibernate, Log4j, JUnit, Apache Maven, SQL, XML, JavaScript, ExtJS, Jetty, MySQL, Git, Jira, Android SDK 2.0 and higher etc. Have experience in: Servlets, JSP, JSF, RichFaces, JSTL, JDBC, iBatis, UNIX shell scripting, Apache Tomcat, JBoss Application Server, PostgeSQL, svn. Can work with Linux (Gentoo, CentOS, Ubuntu etc), FreeBSD, MS Windows + Server, MacOS.

    $22.22 /hr
    0 hours
    0.00
  8. Aljosa B.

    Aljosa B.

    Senior Linux Administrator

    Bosnia and Herzegovina - Tests: 13

    I’m highly experienced in installing, configuring and maintaining different flavours of Linux, mostly Red Hat, CentOS, Debian and Ubuntu. I also have in-depth knowledge of virtualization platforms such as VMWare(both Workstation and vSphere) and Xen. During my career, I gained extensive knowledge in configuring different services such as configuring Apache and Nginx with PHP to handle high loads (mostly using php as FastCGI), then configuring and maintaining MySQL databases – optimizing, locating slow queries, backups, disaster recovery, etc. I’m also very knowledgeable in configuring Postfix and Dovecot as well as ClamAV and SpamAssasin for fighting e-mail spam and malware. My other abilities include configuring NetFilter firewall, OpenVPN tunnels, SSH, Samba, FTP and Linux kernel tweaks as well as configuring SELinux for enhanced security. My area of interest is also intrusion detection such as detecting web application break-ins by exploiting common flaws such as SQL, command and code injection. Aside from that, I’m also experienced in preventing Distributed Denial of Service Attacks (DDoS) on various services. During my job as IT security stuff i also had much time to work as a penetration tester/ethical hacker. Mostly experienced with Acunetix, Nessus, OWASP, Metasploit , Hydra, nmap and Saint. I’m also familiar with Web Hosting Panels such as cPanel and Plesk. I’m also experienced in installing and configuring popular web applications such as WordPress, Joomla and Drupal to the point of being able to create simple web sites. When it comes to Windows platform, I have extensive knowledge of Windows Workstation OSes and solid knowledge of Windows Server OSes.

    $11.00 /hr
    0 hours
    0.00
  9. Joshua Andre Basarte

    Joshua Andre Basarte

    Software Developer

    Philippines - Tests: 2

    A software developer with certifications in Java SE and Agile Development, among other things, I have worked in the telecommunications industry since 2009. Creating backend applications, mainly in Java and PHP, writing scripts for stats collection and application suite health, as well as Database design are some of roles that I have taken on in my career. I also have had some experience creating proof-of-concept Mobile applications in iOS and Android, as well as researching and testing new applications as possible solutions to different problems. I look forward to facing new challenges, strengthen my skills and add new ones along the way, and hopefully create a products that are awesome and useful to the world.

    $18.00 /hr
    3 hours
    0.00
  10. Asfer Saleh

    Asfer Saleh

    Windows & Linux, Network, Database & VOIP Administrator

    Bangladesh - Tests: 4

    Expert in Server/PC/Notebook/Netbook/VPS running Microsoft Windows Server 2000/2003/2008/2012, MS-DOS, Notepad, WordPad, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Access, Microsoft FrontPage, Microsoft Outlook, Outlook Express (All versions), Windows Mail, MYSQL/MSSQL Server, Web designing, 3CX/Grand Stream, CISCO VOIP Server, IP Phone, MRTG/Whatsup etc Monitoring Tool, HDD physical & logical bad sector repair, Partition Convertion and resizing, O/S Restoration/Recovery , Bootable OS CD/DVD-Writing, Making a pen drive bootable, Data Backup and restore, Data recovery, Logical Volume Cloning, Basic and fail-safe virus check with Antivirus with latest update, System devices Diagnosis, Network Administration Internet Gateway Server, Email (POP3, IMAP, SMTP) Server, Website Server, NAT Server, RIS Server, Terminal Server, Remote Access Server, Print Server, File Server, Microsoft Exchange Server, PXE Server for PXE boot ROM client, WIFI Router, WIFI Access point, Managed/Unmanaged switch, DHCP Server, WINS Server, DNS Server, Domain Controller Server etc.], Software application Installing, configuring, administering and troubleshooting using Linux, Solaris and all versions of Microsoft's operating systems all other built-in administrative tools with any Microsoft operating system for large or small medium enterprise organizations.

    $11.11 /hr
    0 hours
    0.00