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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 - Last active: 1 month ago - 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. Jordi S.

    Jordi S.

    Freelance System Administrator

    Spain - Last active: 02/02/2014 - Tests: 7

    System administrator of more than 30 Linux machines - specialized in daily systems maintenance of RedHat Enterprise Linux, CentOS and derivatives. Including tasks are patching and updating, developing, installing and maintaining utility programs/shell scripts to manage application start, stop, end-of-day, monitoring and failure/recovery. Pretty much aware of all typical UNIX/Linux services, especially specialized in Samba, Sendmail, Dovecot, Apache, Perl, ProFTPD, NTP, OpenSSH, MailScanner, Squid, SquirrelMail, SPF, Roundcubemail, Milter-Greylist, Bind, Fail2ban, NFS, NetAtalk, etc. Very familiarized with HP ProLiant series and HP system management software. Perl and C system programmer - please, see 'Monitorix' at http://www.monitorix.org a pure Perl monitoring solution, see also 'Fiwix' at http://www.fiwix.org a UNIX/Linux-like hobby operating system kernel as a reference. I also work with PHP (Ncurses), Perl and Shell scripting for daily system administration. I'm driving my own GNU/Linux service company at http://www.fibranet.cat and I'm happy to provide a wide range of professional services. I also have experience embedding GNU/Linux systems on a different x86 and ARM devices for vertical rock-solid tasks.

    $23.33 /hr
    0 hours
    0.00
  3. Donovan F.

    Donovan F.

    Cloud Engineer and Linux Expert

    South Africa - Last active: 5 months ago

    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. Evgeny Lebedev

    Evgeny Lebedev

    Linux System Administrator

    Russia - Last active: 24 days ago - Tests: 3

    System administration: - CentOS\RHEL: maintenance/troubleshooting, ftp, openvpn, lamp, dhcp, dns, nat, proxy, samba, nfs, snmp, monitoring - databases: mysql, mongodb - monitoring: zabbix - atlassian products: jira, confluence, bamboo - automation: ansible (lamp configuration) - languages: - python (+django): application for data gathering from oracle rdbms + visualization, tools for work with cloud api (swift) - java (j2ee, resteasy, hibernate). experience: data processor for communication between services, site anouncements aggregator tool - php. experience: sites for small business, application for orders management - bash (scripting for automatization) - application servers: jboss, wildfly - vcs: git - security: tripwire, rkhunter, clamav - virtualization: hyper-v (live migration, replication, etc), virtualbox Personal: - Experienced user of Agile Results methodology (by J.D.Meier)

    $16.67 /hr
    0 hours
    0.00
  5. Aleksandr G.

    Aleksandr G.

    Python Developer/System administrator

    Russia - Last active: 20 days ago - Tests: 5

    Hello, I glad to introduce to you my profile. I have worked as system & security administrator 3+ years. I have got a good experience with Python 3, Django, Flask, JS(JQuery), MS SQL Server, MySQL I will be glad to do tasks related with above. Also,I am very experienced with some Information Security systems: DLP systems, AntiVirus applications, IPS\IDS, PKI,WAF, Vulnerabillity assesment I have skills in search malicious shells in websites on different CMS.

    $16.67 /hr
    0 hours
    0.00
  6. Joshua Andre Basarte

    Joshua Andre Basarte

    Software Developer

    Philippines - Last active: 4 months ago - 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
  7. Aljosa B.

    Aljosa B.

    Senior Linux Administrator

    Bosnia and Herzegovina - Last active: 3 months ago - 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
  8. Oleg Dukh

    Oleg Dukh

    System Administrator/IT Engineer

    Ukraine - Last active: 4 months ago - 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
  9. Bila O.

    Bila O.

    Java EE / Android developer

    Ukraine - Last active: 09/02/2014 - 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