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CentOS Job Cost Overview

Typical total cost of Upwork CentOS projects based on completed and fixed-price jobs.

Upwork CentOS Jobs Completed Quarterly

On average, 131 CentOS projects are completed every quarter on Upwork.

131

Time to Complete Upwork CentOS Jobs

Time needed to complete a CentOS project on Upwork.

Average CentOS Freelancer Feedback Score

CentOS Upwork freelancers typically receive a client rating of 4.86.

4.86
Last updated: September 1, 2015
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  1. Daniel Yavorovich

    Daniel Yavorovich

    System Administrator

    Ukraine - Portfolio: 1

    Operating Systems ● FreeBSD ● Linux Security ● iptables ● openssl ● jail ● clamav ● mod_security ● mod_clamav DNS ● Bind ● PowerDNS (+PostgreSQL / +MySQL) HTTP ● Apache ○ MPM: prefork, worker ○ mod_ssl, mod_php, mod_wsgi ● Nginx ○ Access control ○ Autoindex ○ Fast-CGI ○ uWSGI ○ Proxy ○ Cache ○ SSL ○ upload_progress_module ○ Control panel integration ■ Virtualmin ■ DirectAdmin ■ Plesk Proxy ● squid ○ basic auth ○ transparent proxy ○ cache ● 3proxy ○ http/socks ○ auth Raid ● Linux ○ md(0,1,5,6,10) ● FreeBSD ○ Gmirror / Striping File Systems: ● Ext 2,3,4 ● ReiserFS ● XFS ● OCFS2 ● ZFS (port to FreeBSD) ● CEPH CVS ● SVN ● Mercurial ● GIT ○ GitLab ○ GitoLite Backup ● rsync ● BackupPC ● Bacula FTP ● ProFTPd ● VSFTPD File sharing ● NFS ● SAMBA Control Panel ● Direct Admin ● Webmin+Virtualmin ● CPanel ● ISP-config ● Plesk Automatization ● Puppet ● Saltstack Monitoring ● Zabbix ● Nagios ● Munin ● Monit Network Understanding of theoretical and practical foundations of the networks (Data link, Network, Transport, Application Layers). VPN ● OpenVPN ● PPTP Database (SQL) ● MySQL (+MariaDB, +Percona) ● PostgreSQL Database (NoSQL) ● ElasticSearch ● Riak ● MongoDB ● Cassandra ● Redis Virtualization & Containerization ● KVM ● XEN ● OpenVZ ● LXC ● Docker ● Vagrant Cluster ● DRBD ○ master-slave ○ master-master (+ocfs2) ● Heartbeat ● Pacemaker Development ● actively use: ○ shell (bash, sh) ○ Python ● Frameworks ○ Django ○ Flask ○ Twisted ○ Tornado Cloud Solutions: ● AWS (EC2, S3, CloudFront, Route53) ● DigitalOcean ● RackSpace

    $33.33 /hr
    45 hours
    5.00
  2. Sergey P.

    Sergey P.

    VoIP and Linux Engineer

    Russia - Tests: 5

    OS: linux (gentoo, debian, centos ...), FreeBSD over 10 years using/administration Lang: perl, lua, shell (java, ruby, erlang studying) VoIP: asterisk, freeswitch, gnugk, kamailio/ser (over 7 year administration) PBX: Si2000 (v.5), Definity administration (SS7, ISDN) DB: mysql, postgresql Sec: DMVPN, IPsec, OpenVPN Publish: LaTeX

    $30.00 /hr
    76 hours
    5.00
  3. Clifton Johnson

    Clifton Johnson

    Over 20 years of IT experience

    United States - Portfolio: 2

    I have over 20 years of computer support, administration and programming experience (both in the private sector as well as at major universities). When I was employed as the lead unix administrator for the College of Science (2000+ user accounts), I managed 14 core servers (providing e-mail, login, web, application, and backup services) to faculty, staff, and graduate students. I also provided customized support for many of the researchers. While working for Bike Friday, I was the sole computer person, responsible for multiple servers, desktops, printers and manufacturing terminals. I was also responsible for web development and in house database management/development using Postgres and Php. I have extensive experience with Drupal site management, including module development.

    $21.00 /hr
    125 hours
    4.80
  4. Konstantin Palkin

    Konstantin Palkin

    Systems Administrator / Developer

    United States - Tests: 7 - Portfolio: 2

    I have a BS degree in IT Computer Networks and I am a System Administrator, Technical Support Specialist with more than 14 years of experience, planning and implementing computer systems and networks. I have in-depth knowledge of Linux Server Administration and IT Technical Management. I have strong experience with discussion, elaboration and implementation customer requirements as well as company's needs. Demonstrate by my adeptness in Web server (LAMP) deploying, configuration, optimization, and security protection as well as Bash/Python/PHP scripting development. In addition I have extensive knowledge of Optimization and Speeding up content delivery and implemented several fully worked systems with modern cache solutions. I have strong experience with maintaining web-sites, optimize MySQL databases, customize components and layouts and implement security measures.

    $40.00 /hr
    15 hours
    5.00
  5. Oubram Mohamed

    Oubram Mohamed Agency Contractor

    Asterisk/Elastix/Freepbx/VoIP/Chan Dongle/Raspberry/Network specialist

    Morocco - Tests: 3 - Portfolio: 2

    i am a VoIP specialist dealing with Asterisk and voip billing Asterisk based servers: Freepbx Elastix A2billing and Kamailio. i have collected much experience in installing and configuring VoIP servers and giving support for costumers during my last job position at Voipmaroc and Nogafone. during my last jobs i was charged to deploy a voip call center based on Elastix for DYARelmansour , a construction company leader in Morocco , and a call center ViciDial for EIGENVALUE based in Morocco and for many end user of IPBX appliances and customized IPbx installations based on asterisk. I have setup many Asterisk servers for many customers in Freelancing and Deployed many Gsmgateways and Asterisk based Gsmgateways. I have also installed and deployed Raspberry and Huawei Dongles as Cheap Gsmgateways . besides , i have Also setup some complex VoIP topologies for call Routing and Terminations via VPN . my diplomat at network engineering and Centos Linux experience helped me to devolope my skills in VoIP. i am ready to serve.

    Associated with: BRAMZ, BlueGoose Tech

    $21.11 /hr
    232 hours
    5.00
  6. Jesse D.

    Jesse D.

    Systems Engineer

    United States - Portfolio: 15

    Career driven with solutions for a connected world. I am a systems engineer and programmer. I have worked for companies in banking, education, and the government. I work with Microsoft Windows Server, (2008/2012) Linux (RedHat/CentOS), LAMP servers. I am also familiar with server side automation, scripting, and security. https://www.linkedin.com/profile/view?id=239423309

    $33.00 /hr
    46 hours
    5.00
  7. Evgeniy P.

    Expert Network/Unix Administrator

    Russia - Tests: 10 - Portfolio: 2

    Over 3 years experience Certified CCNP network specialist with experience of working at ISP in Russia with about 150k+ customers. • Certifications: CCNP R&S, CCNP SP, CCNA. • Skills OSPF,EIGRP,BGP,IS-IS,STP,VTP,HSRP,VRRP,Network Design,DMVPN,LAN,WAN,VPN,QoS,DNS,DHCP,IPv4,IPv6,MPLS,VPLS I am looking for a job to apply my experience and knowledge.

    $22.22 /hr
    37 hours
    4.98
  8. Sergo Sarkisian

    Sergo Sarkisian

    Linux , Cisco ,Vmware , Voip, firewall , security specialist

    Georgia - Tests: 18

    I want to utilize my knowledge, skills and professional experience in order to contribute to the growth of the company I am working for whilst improving myself. SKILLS:network engineer ,system administrator(RedHat,CentOS,FreeBSD,OpenBSD,WIndows 2000,2003 server), cisco certified specialist(CCNA) Configuration of CISCO routers and switches,firewalls,servers:cisco 36xx,65xx, series,ASA firewall 55xx series, Implementation , configuration,design ,troubleshooting of basic routing protocols(BGP,EIGRP,RIP,OSPF,QoS,MPLS,HSRP,VRRP,GLBP) , Security: IPsec and many vpn solutions,certificate setup 1 Web servers - Apache 2.x,nginx,Squid proxy 2 Mail servers -Postfix,qmail ,sendmail,Mdaemon 3 FTP servers -WuFTPD,Vftpd 4 DNS –bind version 9 ,VPN (Openvpn, IPSEC implementation ) 5 DATABASES-Sql,mysql,postgresql,sqlite 6 LVM ,RAID(0,1,5,10) configuration 7 Experinece in network monitoring tools:Nagios,MRTG ,Cacti

    Groups: Bluehost Developers and Designers

    $20.00 /hr
    921 hours
    4.99
  9. Alexandru V.

    Alexandru V.

    Senior Linux Administrator

    Romania - Tests: 4 - Portfolio: 2

    * Fully manage the installation, configuration and troubleshooting of Linux servers * Install and configure Web Servers and MySQL * Install and configure customer scripts and programs * Monitor performance to identify and resolve issues using a suite of systems and tools. * Troubleshoot and resolve network, system, hardware and software problems. * Achieve quick fixes and / or long-term solutions as needed. * Maintain 100% customer satisfaction through all available means.

    $20.00 /hr
    126 hours
    4.99
  10. Sergiy R.

    Sergiy R.

    Linux System Administrator

    Ukraine - Tests: 9 - Portfolio: 1

    I am an experienced System Administrator with a wide range of skills, including Linux servers administration, LAMP stack setup, OpenVZ and KVM virtualization, configuring services, working with version control systems and writing system maintenance scripts. I have a hands-on experience with Linux, including Ubuntu, CentOS, Red Hat, Gentoo and Debian distributions. I am able to code in OCaml, C, C++, Ruby (including Ruby on Rails), Bash/Zsh and read Java, Python, Haskell, Perl and Common Lisp programs. My most important virtues are: extreme responsibility, easy communication and attention to details.

    $40.00 /hr
    476 hours
    5.00