CentOS Freelancers

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CentOS Job Cost Overview

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

oDesk CentOS Jobs Completed Quarterly

On average, 153 CentOS projects are completed every quarter on oDesk.

153

Time to Complete oDesk CentOS Jobs

Time needed to complete a CentOS project on oDesk.

Average CentOS Freelancer Feedback Score

CentOS oDesk freelancers typically receive a client rating of 4.85.

4.85
Last updated: April 1, 2015
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Timur Birsh

Timur Birsh

Unix Systems Engineer

Kazakhstan - Last active: 15 days ago - Tests: 7

Hello, My goal is provide solutions to the clients. No matter how big or small your project. If you need to fix your problem by the professional engineer please do not hesitate to contact me. Please read below to get overview of my skills. Thank you. Over the last 13 years, I am working with the Unix systems FreeBSD, Solaris and Linux distributions including RedHat Enterprise Linux, CentOS, Oracle Linux, Debian and Ubuntu. I have developed a wide range of solutions: - DNS servers using BIND. - High availability DHCP servers using ISC DHCP software. - Web servers using Apache and nginx (LAMP stack). - Reverse proxies using nginx and Squid. - Mail systems using Postfix MTA and Courier mail server. - High availability file servers using Samba/CTDB/DRBD, NFS, OpenAFS, OCFS2. - Single sign on authentication/authorization servers using Kerberos and OpenLDAP. - VPN servers using OpenVPN. - High availability MySQL servers. - Internet gateways/firewalls under Linux/FreeBSD using iptables/ipfw. - Application level load balancers using nginx. - Monitoring servers using Nagios, Icinga, Munin, MRTG, Graphite. - Backup servers using Bacula. Oracle Database administration under Solaris, Linux and Windows. Virtualization: - KVM / LXC / Xen / VirtualBox / AWS. - VM images customization and troubleshooting. - VM provisioning automation. - libvirt, libguestfs, cgroups. High availability Linux systems using Pacemaker/Corosync. Over 10 years of experience in programming for Linux: - C, Pascal - bash, POSIX shell, Perl, Python. - lex/yacc. - make, autotools. Source code management tools: - Git. - SVN. - CVS. Over 4 years of experience in the GE Smallword administration. Over 60 Smallworld servers. High availability datastores. Scripts development for complex text processing using Unix shell, sed and awk. I am Debian Project Contributor. Please take a look at http://qa.debian.org/developer.php?login=taem@linukz.org.

$33.33 /hr
13 hours
4.97
Mohamed El Sayed

Mohamed El Sayed

Senior Linux Engineer/DevOps Engineer

Egypt - Last active: 4 days ago - Tests: 3 - Portfolio: 1

I worked as freelance systems administrator through out college years, and worked as an Operation Engineer for Gawab.com right after graduation. I was responsible for managing a Linux based cluster providing email, web and database services on top of a Xen based virtualized servers to Gawab.com's clients, based on various Open Source technologies and in-house developed solutions. I planned and executed a 0-down-time data center migration, managed a multi-server MySQL setups with complex replication and fail-over configuration and fully automated several internal complex operations. I also defined and implemented a new service monitoring and abuse/SPAM managment process for the company. I designed and implemented several scalable web and database infrastructure for Gawab outsourcing clients. My work involved working with several web and database load balancing technologies, monitoring, fail-over, backup and monitoring. And I wrote several automation and management scripts in Bash, python and PHP. I also have some experience with C and C++ and SQL. My technical interests include systems automation and management , cloud and virtualization technologies, scalable web and database architectures. I have years of experience working for Free/Open Source applications like: Apache, MySQL, PHP, Nginx, Nagios, Xen, postfix, qmail, iptables..etc.

$33.33 /hr
332 hours
4.97
Daniel Yavorovich

Daniel Yavorovich

System Administrator

Ukraine - Last active: 16 days ago - 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
32 hours
5.00
Igor S.

Igor S.

Linux sysadmin, cloud deployments specialist

Czech Republic - Last active: 1 day 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
6,723 hours
4.88
Oleksandr N.

Oleksandr N.

Senior System Administrator, Security officer, Mig...

Ukraine - Last active: 1 day ago - Tests: 20 - Portfolio: 16

YOUR POSITIVE FEEDBACK IS THE HIGHEST AWARD FOR ME ;) Will do my best to assist you in any questions and tasks you may have =) Here is some info about my experience. SUMMARY Specialties: Information Technology / Internet / IT Division / Computer security/ Internet Services / System Administration/ Webmaster Support / Web Analysis/ SEO / SEM / Internet Marketing Web hosting services (SSD hosting solutions) EXPERIENCE: d(-_-)b Linux/Windows system administrator, Operations team EuroVPS/WebDomSolutions January 2012 - May 2013 Greece, Athens Responsibilities: - Tickets; - System administration and monitoring. Theoretical and practical skills: - Operating Systems: RedHat/CentOS/Fedora, Debian/Ubuntu, FreeBSD, Windows Server 2003/2008; - Virtualization: Virtuozzo, OpenVZ, VMware, Onapp Xen, Apache CloudStack; - Setup/configuration: nagios, kayako, racktables, confluence, observium, nginx, php-fpm, liteSpeed, Apache CloudStack, Hostbill, WHMCS, redmine; - Control panels: Plesk, WHM Cpanel. - Database Administration: SQL Server, MySQL, MariaDB ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <( -'.'- )> freelancer SEO freelance October 2010 - March 2012 (1 years 6 months) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ o(^_^)o System Administrator / Techsupport Webintellects/Webhostgian/Jumpline/Webdomsolutions November 2010 - March 2012 (1 year 5 months) US, Ohio Responsibilities: - Live Chat support, Tickets; - System/Server/Control Panel administration; - Nagios monitoring; - Internet research and work with technical documentation. Operating Systems: * RedHat/CentOS,Fedora * Windows server 2003/2008 * VPS setup and configuration (Parallels Virtuozzo Containers); Advanced theoretical and practical skills in such areas: - Operating Systems: RedHat/CentOS/Fedora, Windows server 2003/2008; - Virtualization: VPS setup and configuration (Parallels Virtuozzo); - Security: Advanced knowledge of Linux security, Firewalls ( IPtables, CSF, APF, BFD, Fail2Ban), Encryption ( SSL), SSH, Host Security Auditing; - Software: Apache servers (versions 1.3.x/2.2), DNS (BIND 9), QMail, Sendmail, exim, LAMP, Plesk/Exim/Cpanel (installing/upgrading/maintaining), Drupal, Wordpress, Joomla, OsCommerce applications, Yum/RPM usage; - Database Administration: SQL Server 2003/2008, MySQL, MS access. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ b(^_^)d Internet Marketing Specialist || Web Analyst DCoM Soft, Inc. December 2009 – August 2010 (9 months) Responsibilities: - Internet Marketing strategy and tactics - Information architecture and Web site content planning - Research of partners - Internet Market Research - Research Usability Design - Online promotion of company's web-based products Skills: - Search Engine Optimisation (SEO) - Paid online Marketing / Pay per Click Management (PPC) - SEO Copywriting/Editing - Social Media Optimization and Marketing (SMO/SMM) - Experience running USA-targeted social Marketing - Writing press releases - Social networking (Twitter, Facebook, Google follow etc) - Google Products, AdWords/AdSense, Google Analytics, Webmaster tools, Google Merchant, etc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \(^_^)/ Customer Relations Representative || Advanced Technical Agent Ecommerce, Inc. May 2007 – October 2009 (2 years 6 months) Responsibilities: - Sales, billing and technical support in solving problems reported by clients; - Chat, helpdesk system, correspondence; - View, Adaptation, "repair" clients' sites; - Basic server/service diagnostic and reports to sysadmin department; - Internet research and work with technical documentation; - Work in team. Basic theoretical and practical skills in such areas: - Linux / Unix OS, Windows server 2000/2003, Windows XP/98; - Servers: Apache, bind, sendmail, ProFTP, MySQL, SQUID / SOCKS, MSSQL, Samba; - Easy coding: PHP, PERL / CGI, HTML, JavaScript, CF, ASP,. NET, C + +; - Widely used protocols (HTTP, HTTPS, SMTP, POP, IMAP, FTP (s), TCP / UDP, etc); - HSPHERE control panel (versions 2.3 and 3).

$34.88 /hr
1,208 hours
5.00
Ahmed Sayed

Ahmed Sayed

Senior Linux Administrator / Virtualization /Aster...

Egypt - Last active: 1 day ago - Tests: 7 - Portfolio: 1

I am a senior technical engineer who has 15 years IT experience in the following areas: Advanced Linux Cluster Administration Asterisk/Trixbox/Elastix/VoIP architect Advanced Knowledge of shell scripting Advanced Knowledge of Perl programming Network Administration Network Security (Penetration Testing) Server Auditing Technical Support Virtualization (mainly Parallels Virtuozzo/openVZ/ProxMox) Web hosting Control panels such as cPanel,Plesk,DirectAdmin Tweaking and Optimizing Apache for better performance Hardening PHP Data recovery

$44.44 /hr
6,755 hours
5.00
Ivan Ershov

Ivan Ershov

AWS Architect/Engineer/Devops

Russia - Last active: 5 days ago - Tests: 11 - Portfolio: 2

Over the last 10 years, I have been working as technical support engineer/team leader/infrastructure architect for several large companies (hosting companies with more than 1000 of dedicated and several dozens of VPS servers, ecommerce application companies, small and large companies with different cloud setups from several to several hundreds of instances) My competency lies in planning, development, deployment and setup of new production environments, troubleshooting/support/improvement of existing production systems based on Linux/Unix. 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.

$38.89 /hr
1,632 hours
4.96
Jacob Ekanem

Jacob Ekanem

Web Designer/Developer, WordPress Enthusiast, Mobi...

Nigeria - Last active: 18 days ago - Tests: 3

Experience from over 12 years of web development has shaped me to be a successful web developer / designer using best practices and up to date technology for all project. Languages I uses include PHP, HTML(5), CSS(3) and JavaScript (Jquery, Angular). I have worked with WordPress since 2.0 and have a vast knowledge in its core functions. I am also very versatile in the use of frameworks like CodeIgniter and PHPCake. I work on all major platforms (linux, mac and windows) so no matter the environment, you can be sure work will get done.

$45.00 /hr
0 hours
5.00
Ahmed AbdElmaqsoud

Ahmed AbdElmaqsoud

Linux System Administrator, Streaming Expert

Egypt - Last active: 6 days ago

I am experienced in: • Linux Server Management. • PHP Web Development. • Search Engines’ Optimization (SEO). Personal Statement: I am a self-motivated character, ambitious, hard worker and time manager. Personal Skills: · Good communication skills. · Able to work accurately and neatly. · Good organizational skills. · Able to work with minimum supervision. · Able to communicate information accurately. · Can work under pressure and meet deadlines.

$35.00 /hr
0 hours
4.97
mohammad kamruzzaman

mohammad kamruzzaman Agency Contractor

Full stack web developer and VoIP Engineer, FreeSW...

Bangladesh - Last active: 12 hours ago - Tests: 1 - Portfolio: 2

i am a full stack web developer and server administrator. i have experiences on Django (python), Codeigniter (php), MongoDB, ElasticSearch, postgres, redis, rabbitMQ, celery, mysql, nodejs. you can hire me if you need to implement a distributed VoIP enabled service that is ready to scale. i am also doing newfies-dialer customization and maintenance for a long while. and also i will take projects like PBX, IVR, autodialer development. i have open source project customization experiences, for example, FusionPBX,Newifes-dialer,Astpp,vBilling,kazoo, Kannel

Groups: Twilio
Associated with: DT software house, NGS
$40.00 /hr
2,433 hours
4.55