CentOS Freelancers

Browse CentOS job posts for project examples or post your job on oDesk for free!

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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Ilya I.

Ilya I.

Expert Linux administrator, Devops

Thailand - Last active: 1 day ago - Tests: 7

My goal is customer satisfaction. If you need to get something done - leave it to me. OS: Linux - expert, FreeBSD and Windows Server - proficient Cloud services: AWS, Rackspace SCM: Puppet, Ansible Web servers: Apache, Nginx, Tomcat Database servers: Mysql, Postgresql Atlassian: Jira, Confluence, Crowd, etc - the whole suite Monitoring: Nagios, Groundwork, Zabbix, Monit, Munin, Cacti Virtualization: Openvz, Vmware ESXi/server, Proxmox Mail servers: Zimbra, Exim, Sendmail, Dovecot Backups: Bacula, duplicity, rsnapshot High availability: Corosync/Pacemaker, DRBD Other: standard network services (DNS, DHCP, LDAP, Samba, SVN/Git, http proxy, jabber, VPN, backups, monitoring etc), firewalls and routers (iptables, iproute, VLAN, bridging, bonding). Performance optimization: Magento, Wordpress, etc.

$95.00 /hr
2,517 hours
4.84
Raskin P.

Raskin P.

VPN,Routing and Switching,Firewall Expert, Mikroti...

Bangladesh - Last active: 3 days ago - Tests: 11 - Portfolio: 44

Network and System Administration Skills having near 6 years of Hands on experience on ISP and Telecom with good exposure on IT networks and systems design, planning and implementation ensuring proper security. Vendor Certification : CCNA (Cisco Certified Network Associate) CCNP Routing &Switching (Cisco Certified Network Professional) RHCE (Red Hat Certified Engineer) MCP (Microsoft Certified Professional) MTCNA (Mikrotik Certified Network Associate) MTCRE (Mikrotik Certified Routing Engineer) JNCIA (Juniper Certified Network Associate) ITIL-Foundation 2011 Course Completed : CCNA Security,CCNA Voice,CCIP BGP,CCIP MPLS Specialization * Routing and Switching: Cisco,Juniper,Mikrotik,HP,Zyxell, Netgear, Quagga, Linux Gateway,Egdemax,Dell * Firewall : Cisco ASA,PFSense,Cisco Pix,Zywall,Linux Iptables,QOS,Edgemax,Mikrotik, Nokia Checkpoint, Fortigate 1000, Juniper SRX 3600 * Server OS Platform : Centos,Ubuntu,Debian,Redhat,Windows Server 2003 & 2008.2012 * VPN (Remote Access/Site to Site): Mikrotik RouterOS,Cisco ASA,Open VPN, OpenSwan, PFSense,DD-WRT,Cisco Pix,PPTP Vpn linux,GRE over IPSEC,Linux IPSEC,Dell Sonicwall PF Sense,Strongswan,Windows Server 2003 , 2008, 2012, Zywall, Netgear,TP Link,Draytek Vigor,Forninet,Juniper Netscreen,Checkpoint,Cisco IPSEC/L2tp,AnyConnect SSL WebVPN. * Application Server : Mail,Dns,Dhcp,Proxy,Samba,Ftp,Web,Active Directory,Cacti,MRTG,Syslog,Free Radius,Daloradius,Phpmyadmin * Virtualization : Vmware,Linux Xen, Vmware ESXI * Application Load Balancer : Cisco ACE 4710,F5 Big IP LTM,Citrix Netscaller, Foundry Serverion, loadbalancer.org * Wireless : DD-WRT,Netgear,Linksys,Dlink,TP Link,Cisco Aironet 1100,1200,WLC,Cisco Lighweight AP joining to WLC. * IP Telephony : Core Asterisk,Elastix,Trixbox,Asterisk now,Free switch,ATA, IP Phone * Cloud : AWS EC2 Instance,DigitalOcean

$40.00 /hr
334 hours
4.94
Luis fernando A.

Luis fernando A.

Linux Sysadmin and AWS Architect with huge web hos...

Brazil - Last active: 1 month ago - Tests: 5

I'm a creative and hardworking Linux System Administrator and Amazon Web Services Architect and developer. I've been supporting and delivering IT solutions especially for web hosting companies and its set of open source software (Apache, PHP, RoR, MySQL, HAproxy, iptables, OpenVPN and much more) since 2005. I've also worked at IBM managing a farm of more than 1000 Linux and AIX servers as well as its proprietary middleware (DB2, IHS, WebSphere and others).

$50.00 /hr
24 hours
5.00
Justin Catello

Justin Catello

Linux System Admin | Tech Support | cPanel / WordP...

United States - Last active: 6 days ago - Tests: 1

I have more than 5 years working as a Linux systems administrator specializing in management for cPanel based servers in both virtual and dedicated environments. Stronger areas: Operating Systems: CentOS / Fedora / CloudLinux Control Panels: cPanel / Direct Admin / SolusVM / Kloxo Billing Systems: ClientExec, WHMCS, HostBill Database: MySQL / MariaDB Web Server: Apache / LiteSpeed / Nginx Virtualization: OpenVZ / XEN / KVM Various Others: cPanel DNS Clusters, Any work including the following: Initial setup of the server which includes configuring software/hardware raid, disk partitioning(LVM as well) Installing OS, Control panel, hardening/optimizing the server including firewall, rebuilding Apache / PHP, setup private name servers, migrating accounts to the server, ensuring all sites are working and make adjustments to server if necessary, make further optimizations to server to best fit the current environment.

$38.89 /hr
18 hours
5.00
Erik G.

Erik G.

Linux System Engineer

Switzerland - Last active: 1 day ago - Tests: 10

I've a great passion for linux systems and open source software. Since 2008 I'm working as linux System Engineer for a company, which is developing software that is provided to our customers as SaaS. For some clients we also provide installations "on site". This gave me great experience in working with CentOS and RedHat linux, puppet, kickstart, nginx as a proxy server, DRBD, database clusters using PostgreSQL with streaming replication, BIND, postfix, pki-authentication, bash-scripting and others. I'm also familiar with other linux operating systems like debian, ubuntu and gentoo. Buzzwords: puppet, linux, CentOS, debian, ubuntu, gentoo, nginx, nagios, bash, perl, DNS, BIND, email, postfix, postgrey, carp, DRBD, KVM, ssl, pki, x509, iptables, ipv6, PostgreSQL.

$55.00 /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
6,687 hours
4.88
Daniel Yavorovich

Daniel Yavorovich

System Administrator

Ukraine - Last active: 9 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
Ivan Ershov

Ivan Ershov

AWS Architect/Engineer/Devops

Russia - Last active: 1 day 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
1,628 hours
4.96
Mohamed El Sayed

Mohamed El Sayed

Senior Linux Engineer/DevOps Engineer

Egypt - Last active: 16 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
330 hours
4.97
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 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 Asterisk/Trixbox/Elastix/VoIP solutions.

$44.44 /hr
6,720 hours
5.00