CentOS Freelancers

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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, 148 CentOS projects are completed every quarter on Upwork.

148

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 4.85.

4.85
Last updated: May 1, 2015
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  1. Ivan Ershov

    Ivan Ershov

    Cloud Architect/Engineer/Devops / Linux Admin

    Russia - Last active: 16 hours ago - Tests: 11 - Portfolio: 2

    Over the last 10 years, I have been working as technical support engineer/team leader/infrastructure architect for the different companies with on-premise/cloud hosting. My competency lies in planning, development, deployment and setup of the environments from scratch, troubleshooting/support/improvement of existing production systems based on Linux/Unix with the focus on automation and high availability. Have a lot of experience in automation/monitoring/backup of different distributed environments with LAMP stack and other applications, different clustering, scalability and high-availability techniques. Operating systems: Debian/Ubuntu, Redhat(Fedora, RHEL, Centos), Suse, AmazonLinux Level of skill with Unix/Linux: RHCE MailServers: qmail, postfix, sendmail etc Databases: Postgresql, Oracle, Mysql, noSQL databases (Mongodb, Cassandra, Couchbase, Redis etc) Clustering: RHCS, terracotta, heartbeat, pacemaker, distributed balanced setups Programming, scripting languages: Bash, PL/SQL, Ruby Clouds: AWS/Tata/RackSpace/CloudStack/Openstack/Azure Automation: Chef/Puppet, RightScale, AWS Opsworks,CloudFormation etc Continuous integration/deployment: Docker, Atlassian tools, Jenkins, SVN/Git, Codebase etc. Loadbalancers/proxies: Clouds LBs, Haproxy, mod_jk, Squid, Apache, Nginx Application servers: tomcat, jetty, jboss, Apache, Nginx, different PHP-based servers Monitoring: Nagios, Zabbix, Newrelic, OMD etc English: fluent Availability: up to 30hrs/week

    $38.89 /hr
    1,692 hours
    4.96
  2. Igor S.

    Igor S.

    Linux sysadmin, cloud deployments specialist

    Czech Republic - Last active: 2 days ago - Tests: 9 - Portfolio: 1

    I would like to offer you my deep knowledge of servers hardware and software, which allows me to fine-tune servers according to their roles, and my ability to anticipate and solve problems in shortest time possible. No Windows please, Unices only, Linux preferrable. Lately my main point of interest has shifted to deploying and maintaining web projects in cloud environments. I am developing monitoring / management tool ( http://m-script.org ) and supporting existing installations, but I am very well familiar with all well known alternatives from both monitoring and cloud management side, so no problem to implement any of them. The point is, I know very well how it works. And how it doesn't, too :) I am interested in any system administration work, especially in cloud environments. The more challenging you setup is going to be, the better. Automated scalability, cross-clouds deployments, combination of traditional and dynamically scalable resources, DNS/Geo balancing - everything is possible, just let me know your needs.

    $40.00 /hr
    6,825 hours
    4.88
  3. Oscar Bass

    Oscar Bass Agency Contractor

    Senior UNIX System Engineer, LAMP, LEMP, Network Security, Cloud.

    United States - Last active: 5 days ago - Tests: 7 - Portfolio: 1

    Expert UNIX system administrator and network engineer. Got a problem? I can solve it! For more than 15 years I have been the I.T. backbone and support for many online companies. I use the most up to date standards for any project I am involved in. I work extremely quick and efficiently. If you have a problem let me help you solve it. OS: Linux - Expert, FreeBSD - Expert, AIX - Expert, HP-UX - Expert, Macintosh OS/X - Expert, Windows Server - Proficient Cloud services: AWS, Rackspace, OpSource, Linode Web servers: Apache, Nginx, Tomcat Database servers: Mysql, Postgresql Monitoring: Nagios, Monit, Munin, Cacti Scripting: bash, perl, shell Virtualization: OpenVZ, Xen, SolusVM Mail servers: Postfix, Exim, Sendmail, Dovecot Control panels: cPanel, Plesk, Direct Admin, Webmin/Virtualmin, ISPconfig, OpenPanel Other: standard network services (DNS, DHCP, LDAP, Samba, SVN/Git, http proxy, jabber, backups, monitoring etc), firewalls (iptables, ipfw, pf)

    Associated with: Bass Designs Agency

    $44.44 /hr
    236 hours
    4.96
  4. Razique Mahroua

    Razique Mahroua

    Cloud Engineer

    Canada - Last active: 11/18/2014 - Tests: 2 - Portfolio: 4

    • Extended knowledge on Cloud computing IAAS and PAAS(Amazon EC2, OpenStack) and related ecosystems (Ceph). • Technical writer on cloud-computing topics (Security, High-availability, clusters). • Fully-virtualized and HA architectures deployment (Proxmox, ESX, OpenStack) and network virtualization (Neutron). • Messaging-systems deployment (Zimbra, Outlook). • Backup solutions (EMC Retrospect, Open source solutions). • Monitoring deployment and administration (Zabbix, Nagios). • Architecture audits. • Load testing (jMeter, Tsung, iozone, vdbench). • HA solutions : Pacemaker, Corosync, GlusterFS, MooseFS, DRBD

    $65.00 /hr
    15 hours
    5.00
  5. Alexander C.

    Alexander C.

    Scala / Java / Haskell developer, Full Stack Engineer, Consultant

    Russia - Last active: 05/31/2014 - Tests: 2 - Portfolio: 4

    Java developer with 8 years of experience. Now also Groovy(2 years) and Scala(1.5 years) developer. Java: Hadoop, Nutch , Lucene/SOLR/ElasticSearch, Morphia(MongoDB ORM), parsers/crawlers(using Apache Httpclient, HtmlUnit and own microframework), Web MVC(Struts 1.x/Grails), Java Desktop Applicatins(Swing) / Applets, webservices (w. Restlet framework), RabbitMQ Java client, Riak Java Client Scala: PlayFramework 2.x, Lift, Akka, ReactiveMongo Groovy: Groovy scripts / Gant build scripts / Gradle Databases: SQL(PostgreSQL/MySQL), MongoDB, Riak, SOLR/ElasticSearch PHP scripts, linux(fedora/centos/ubuntu) server administration, SVN / Git, SEO methods/scripts, affiliate marketing. Check my blog(chepurnoy.org)/GitHub(kushti) also.

    $60.00 /hr
    1,026 hours
    4.99
  6. Jochen Demmer

    Jochen Demmer

    Network Designer / Linux Professional

    Germany - Last active: 11/16/2014 - Tests: 5

    Software ideas - Rule-breaking product ideas - What do you need very badly - What are cool features for my software? - investment considerations Superficial strategic software decision making - What can and can't be done. Network design - IPv4/IPv6, VLAN, HP Comware, Dynamic Routing, 802.11, Load balancing, High availability Server Administration - Linux (Debian, Ubuntu, CentOS, RedHat, OpenWRT)

    $60.00 /hr
    2 hours
    5.00
  7. Risharde R.

    Risharde R.

    System Administrator, Programmer, Migration Specialist

    Trinidad and Tobago - Last active: 16 hours ago - Tests: 12

    Hello! Thank you for viewing my profile! I am a Windows and Linux System Administrator / Programmer / Migration Specialist with over 13 years experience in the field of Information and Communication Technology. I urge you to choose me because I am dedicated and honest. My rates are affordable and my wealth of experience is vast. I also believe in excellent customer service. I am also a very quick learner and implementer. I think outside the box and find ways to get around problems that will save you time and money. As a Migration Specialist, I have migrated multiple Drupal 5 to Drupal 6 and Drupal 7 websites (even without using the migrate_d2d modules), transferred websites and databases from server to server and modified DNS configurations to point to new websites. As a Linux Administrator, I am experienced using CENTOS and Debian in conjunction with cPanel and Virtualmin installations and configurations. I have used both Virtual Private Servers as well as Dedicated Servers. As a Programmer, I can easily understand and program in PHP, VB.NET, Bash, Basic, Java, Javascript, Perl, Pascal, Tcl, HTML, CSS with additional experience in Drupal and Wordpress content management systems. I also have experience with setting up servers using linux (such as webhosting servers) running on WHM/Cpanel and Virtualmin. Thank you for taking the time to review my skills.

    $20.00 /hr
    11 hours
    5.00
  8. Igor C.

    Igor C. Agency Contractor

    RIA (Flex|AIR|ActionScript|Flash),(FMS|Red5|Wowza), (J2EE|PHP),(MySQL)

    Moldova - Last active: 16 hours ago - Tests: 7 - Portfolio: 15

    I am an RIA (Adobe Flex|AIR|ActionScript 3.0|Flash), Streaming Server (FMS|Red 5|Wowza), RDBMS (MySQL|MSSQL|Informix|Firebird), CMS (Alfresco|Sitefinity), J2EE, PHP developer with good applied experience. I have worked on a number of complex RIA/Game/Enterprise projects and apply the different patterns. I would like to participate in an interesting project where I can apply my skills. I always work towards providing quality work results and create as much optimal solutions as it is possible.

    Associated with: Web Epoch Interactive Inc. Agency, IT_MOLDOVA

    $34.44 /hr
    9,215 hours
    4.75
  9. Faisal Naeem

    Faisal Naeem

    Linux/Web Hosting/Mail/DNS/NMS Server Administrator, IT Support

    Pakistan - Last active: 12/07/2014 - Tests: 17 - Portfolio: 8

    An experienced Linux System Administrator with skills in CentOS/RHEL/Ubuntu/Fedora Server/VPS Configuration, Administration and Troubleshooting plus L2/L3 support expertise. I am having hands-on expertise to Mail / Web Hosting / Virtualization / Network Monitoring / Media Streaming / OpenGTS / DNS / FTP / Backup / Firewall Servers, Data center Administration and Server Security measures. My exposure to Amazon EC2, Linode, GoDaddy and Hostgator physical/virtual server environment is quite good. I am looking forward to utilize my experience and technical skills to offer quality work with client’s contentment. Possessing 08 years experience in Information Technology including 3.5 years experience in as System Administrator in Data Center (Systems Team) and currently working as Manager (Linux Systems). I have experience in administration of heterogeneous network with a variety of open source tools to provide an excellent IT infrastructure for organizations.

    $18.00 /hr
    12 hours
    4.70
  10. Yawar Hadi

    Yawar Hadi

    Voip, asterisk, perl scripting, freeradius, linux, mysql developer

    Sweden - Last active: 07/07/2012 - Tests: 3 - Portfolio: 3

    From last two years i am working on asterisk, free radius and mysql.I developed a full voip application which consist of * Calling Card Application * Soft phone to PSTN calls * DID to Soft Phone * DID to Forwarded no. * SIP to SIP calls * Call routing besides these i add the asterisk realtime functionality using mysql database and for billing i use the free radius server. So my core competencies are asterisk, perl, python, free radius, mysql DB and working on linux plat form.

    $8.89 /hr
    75 hours
    5.00