CentOS Freelancers

Showing 126 freelancers

CentOS Freelancers

Showing 126 freelancers

  • Senior System and Network Administrator

    I'm fully working from the last 5+ years as a Linux Administrator . I'm well experienced in Linux Server administration tasks in the production and development environments - Have a good knowledge and hands on experience in Apache, Iptables, Openvpn … more

    I'm fully working from the last 5+ years as a Linux Administrator . I'm well experienced in Linux Server administration tasks in the production and development environments - Have a good knowledge and hands on experience in Apache, Iptables, Openvpn, Sendmail, Postfix, Mysql, FTP, Samba, SVN, Asterisk, Elastix, Mysql replication,Kerio Control, JIRA, Confluence, MantisBT, Redmine, Zabbix servers, Hudson, Bash scripting,ESXI Virtualization etc..  less

    linux-system-administration apache-administration mysql vmware-esx centos network-administration unix-shell zabbix redhat-administration openvpn 00 more less
    • $23.33 HOURLY RATE
    • 5.0
    • 20 HOURS
    • ARMENIA
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 6 TESTS
  • Senior Systems & Network Engineer

    I have over 15 years of experience in the IT field, having worked at some of the most demanding environments as a Security expert and a Senior Unix System administrator (FreeBSD/Linux). I specialize in complex ISP based UNIX installations … more

    I have over 15 years of experience in the IT field, having worked at some of the most demanding environments as a Security expert and a Senior Unix System administrator (FreeBSD/Linux). I specialize in complex ISP based UNIX installations, corporate Mail servers, Web servers, Database servers and large ZFS based storage solutions. I have extensive knowledge in Virtualization technology. I have being involved with various type of Cloud solutions especially with OpenStack and CloudStack. I also perform installations, maintenance and troubleshooting of Network Security devices for corporate based environments. Being very familiar with Cisco ASA, FWSM and Checkpoint SecurePlatform and IPSO. Please visit my blog at http://www.aisecure.net/about for more information.  less

    freebsd security unix-system-administration vpn linux-system-administration centos rhel solaris-administration firewalls mail-server-implementation apache-administration amazon-ec2 virtualization mysql 00 more less
    • $30.00 HOURLY RATE
    • 5.0
    • 349 HOURS
    • GREECE
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 10 TESTS
  • Expert Wordpress/PHP developer | Scripting expert

    I have lots of experience building and enhancing Wordpress plugins. My main strengths are: - Clean coding - 100% Wordpress coding standard compliant - Availability - usually respond within 5 to 10 minutes to any queries during CST workhours - Fast and top quality work … more

    I have lots of experience building and enhancing Wordpress plugins. My main strengths are: - Clean coding - 100% Wordpress coding standard compliant - Availability - usually respond within 5 to 10 minutes to any queries during CST workhours - Fast and top quality work I also have experience developing web pages using Perl and/or PHP, Javascript/jQuery, VBScript, CSS, Ajax and MySQL databases. I worked for a Fortune 500 automotive company in a reporting and analysis position, and also building and maintaining a website in the company's intranet using Perl and MySQL. After that I was in charge of supporting a website built with Java and the Spring framework, using both MySQL and Oracle databases, for customers worldwide. I also worked at the tech support helpdesk for that same company for over a year, troubleshooting Linux servers and workstations, networking and other data related issues. I was also in charge of administering KBOX ticketing system for over a year, from content management to database administration, to scripting solutions for its customers. I also have knowledge in scripting using different technologies, such as VBScript, Javascript, Linux shell scripting, Perl, and some Powershell, as well as VBA for Excel and HTAs. I was also regularly troubleshooting C and Java programs for bugs and/or enhancements. After that, I moved to a company named Softtek as a Software Engineer, I was part of a team that develops Wordpress plugins and themes for an American multinational conglomerate corporation. The last position I held was for yet another company as a Linux intermediate administrator, where I was in charge of managing users with Centrify and I also installed Cacti to monitor some of the company's servers running CentOS. Currently, I work on my own mostly developing Wordpress plugins and themes. I have specialized myself working on web development, mainly PHP with MySQL databases, but also Javascript/jQuery for the front end.  less

    wordpress php microsoft-excel perl microsoft-visual-basic jquery javascript vbscript centos web-scraping website-development java c data-scraping oracle-database mysql sap-sybase-adaptive-server-enterprise oop vba .net-framework 00 more less
    • $55.56 HOURLY RATE
    • 5.0
    • 70 HOURS
    • MEXICO
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 18 TESTS
    GROUPS:
  • node.js (ex. php) backend webdeveloper

    I'm one of the 3% most active JavaScript users on github - see first link in my portfolio. I prefer making keep-it-simple hi speed and highload web applications. I have developed more than 5 RESTfull NodeJS servers for mobile applications … more

    I'm one of the 3% most active JavaScript users on github - see first link in my portfolio. I prefer making keep-it-simple hi speed and highload web applications. I have developed more than 5 RESTfull NodeJS servers for mobile applications. Data exchange were carried via xml/json,and HTTP get/post queries. I have created more than 5 webscrappers/proxies on phantomJS I can use MySQL,PostgreSQL, AmazonRDS, MongoDB, Redis as databases. I can deploy this applications on Centos 6.4 VPS/VDS servers or Heroku Cloud Application Platform. In my work i use git,mercurial and SVN version control systems, for every job i create a private repo at bitbucket.org for (me and customer only) for feedback, bug reports and support. I have a strong background as php/zend/symfony 1.4 developer and linux user since 2002 year.  less

    node.js redis javascript php jquery mysql mongodb apache-administration linux-system-administration centos api-development heroku git mercurial svn ssh nginx symfony zend-framework 00 more less
    • $28.89 HOURLY RATE
    • 4.8
    • 429 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 9 PORTFOLIO ITEMS
    • 6 TESTS
    GROUPS:
  • Linux/Unix System Engineer, Cloud Solutions, Junior Ruby Developer

    Management Systems, provide Infrastructure solutions, always focused to deliver high available solutions, for my clients. OSs: Debian, Ubuntu, Centos WEB deployment: (installation / optimization / deployment /) using: - Apache, Nginx, PHP, MySQL, Varnish, Memcached, Java Applications based on Tomcat - Development Processes automation based … more

    Management Systems, provide Infrastructure solutions, always focused to deliver high available solutions, for my clients. OSs: Debian, Ubuntu, Centos WEB deployment: (installation / optimization / deployment /) using: - Apache, Nginx, PHP, MySQL, Varnish, Memcached, Java Applications based on Tomcat - Development Processes automation based on Jenkins, Puppet. - Deployment (configuration and administration) of web applications built on: - Drupal CMS, Magento, Zend, Symfony Framework Databases (installation, configuration, administration): Mongodb, MySQL Cloud Systems: AWS(auto scaling, Loadbalancer, EC2, S3, Route53, Automations scripts (API)), DigitalOcean PaaS: Openshift Monitoring Tools: - Capturing, analyzing and storing statistics with Logstash, Graylog2, AMPQ, Elasticsearch - Drawing maps with statistics Collectd, Graphite - Alerts, notifications and syslog with Dude, Nagios - Advanced knowledge of Nagios Hight secured VPN system: OpenVPN based Virtualization: ESXi, KVM, OpenVZ Networking: Advanced level of administration Cisco devices: CCNA Certified, Basic level Mikrotik routers Backup Bacula based Storage systems, NFS, Glusterfs. Subversion administration. Chat, Openfire based Basic level: Bash scripting, SQL, Ruby, Capistrano, MongoDB, Vagrant, F5 BIG-IP load balancer, Haproxy  less

    cisco-routers tcp-ip devops agile-software-development jenkins haproxy linux-system-administration mysql openvpn centos apache-administration nginx windows-administration windows-7-administration unix-shell amazon-ec2 amazon-rds amazon-web-services amazon-s3 00 more less
    • $16.67 HOURLY RATE
    • 4.8
    • 538 HOURS
    • ROMANIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 4 TESTS
  • Network and System Administrator

    Level 3 support for various customers. Technologies: MS Windows 2003/2008 Linux (CentOS) MS Exchange 2003/2007/2010 BlackBerry Enterprise Server Plesk, cPanel SonicWall Firewall, Cisco, Fortigate VPN Tunnels Network Load Balancing and High Availability IIS, Apache, Tomcat DNS Server … more

    Level 3 support for various customers. Technologies: MS Windows 2003/2008 Linux (CentOS) MS Exchange 2003/2007/2010 BlackBerry Enterprise Server Plesk, cPanel SonicWall Firewall, Cisco, Fortigate VPN Tunnels Network Load Balancing and High Availability IIS, Apache, Tomcat DNS Server MACOS Citrix XenServer, Microsoft Hyper-V, Vmware MSSQL, MySQL Exim, Postfix, PowerMTA Elastix, Asterisk, PBX technologies I've been involved in various maintenance and/or implementation projects based on technologies mentioned above.  less

    linux-system-administration firewalls tcp-ip apache-administration iis network-administration vpn virtualization microsoft-virtual-server centos asterisk cisco-asa elastix citrix-xenserver xen-hypervisor xen-cloud-platform windows-nt-administration windows-administration cpanel blackberry-app-development 00 more less
    • $20.00 HOURLY RATE
    • 5.0
    • 887 HOURS
    • ROMANIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 5 TESTS
  • Linux System Administrator

    Over the last 4 years, I've been working with a Web Hosting support company, where I had to handle cPanel/WHM, Direct admin, Plesk (basic windows hosting), Apache/Litespeed, MySQL, basic PHP, Exim, DNS(bind9) and many other applications … more

    Over the last 4 years, I've been working with a Web Hosting support company, where I had to handle cPanel/WHM, Direct admin, Plesk (basic windows hosting), Apache/Litespeed, MySQL, basic PHP, Exim, DNS(bind9) and many other applications and cloud servers . Has experience in setting cPanel based cloud Linux with all the server hardening’s and also have the basics of bash scripting. Have experience in both voice and ticket support system(WHMCS, osticket etc). Can handle tickets with least response time and with good tecnical resolution and customer satisfaction since I'm having another 1.5 years of exp in BPO voice support for and MNC. I have experience and have configured LDAP, R1 soft backup for cPanel accounts, duplicity backups etc. I also have experience in setting up Linux servers, installing custom scripts, hardening the server etc. I also have knowledge in OpenVZ, xen and VMware virtualization. Has experience in configuring the said virtualizations. I'm an expert in Nagios monitoring and with various other monitoring tools. -Always available in case of emergency just a ring away(Has both Mobile and landline number). -Has setup multiple monitors in twinview mode which helps to multitask easily and helps in reducing the ticket response times. -Experience in BPO has improved my customer satisfaction skills. I always believe in the fact that a Customer is always the king. -Fast and reliable internet connection with a standby emergency WiFi network. -Two laptops(Ubuntu and Windows) and a desktop in case of emergency. -Flexible work hours and is ready to work on weekdays too. -Trustworthy and transparent work. -Can provide daily shift reports in a well formatted way.  less

    linux-system-administration cpanel whm whmcs wordpress ubuntu centos ldap dns domain-migration joomla apache-administration exim php redhat-administration plesk technical-support mysql 00 more less
    • $8.89 HOURLY RATE
    • 4.6
    • 256 HOURS
    • INDIA
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 2 TESTS
  • AWS/WHM/Cpanel/Plesk/Zpanel/ISPconfig/Virtulamin/Webmin

    6+ Years of Experience in System and Network Administration Operating system: Ubuntu, Debian,CentOS,Red Hat, Windows Server (2003,2008,2012), XP, Vista, Win7, OSX Server: AWS, EC2, S3, EBS, Digital Ocean, Rackspace, Hostgator, Godaddy Active Directory, Samba4, VMware Vsphere … more

    6+ Years of Experience in System and Network Administration Operating system: Ubuntu, Debian,CentOS,Red Hat, Windows Server (2003,2008,2012), XP, Vista, Win7, OSX Server: AWS, EC2, S3, EBS, Digital Ocean, Rackspace, Hostgator, Godaddy Active Directory, Samba4, VMware Vsphere, Xen Server, Apache/Tomcat, Nginx, Samba File Server, Free Radius, Openfiler, LTSP Server,ISPconfig, Zpanel, Cpanel, Plesk, Linux/Windows Terminal Server, DNS, Bind, MS Excange 2013, Zarafa, Resara, Postfix, Dovecot, Cloud Computing, High Availability Security: IPsec VPN, PPTP,SSH, SSL/TLS Untangle, ISA, Zentyal Hardware: Laptop, PC, Router, Switch, Printer, HP server, NAS, SAN Website Application: Wordpress, Magento Ecommerce, Woocommerce  less

    linux-system-administration ubuntu wordpress mysql microsoft-excel microsoft-word magento windows-administration phpmyadmin centos squid openvpn performance-testing performance-tuning hardware-troubleshooting apache-administration lamp-administration firewalls microsoft-active-directory tcp-ip 00 more less
    • $16.67 HOURLY RATE
    • 4.7
    • 416 HOURS
    • PHILIPPINES
    • LAST ACTIVE
    • 4 PORTFOLIO ITEMS
    • 5 TESTS
  • AWS,Cloud, VOS , Asterisk,VoIP,Linux,BulkMail

    Over the last 9 years I've been working in web hosting industry and have a hand on experience of Linux/Unix system and A+ expertise in all Linux troubleshooting. I've expertise of Amazone, RackSpace, VMWare ESXi(4,5 … more

    Over the last 9 years I've been working in web hosting industry and have a hand on experience of Linux/Unix system and A+ expertise in all Linux troubleshooting. I've expertise of Amazone, RackSpace, VMWare ESXi(4,5), XenServer, Load Balancer, WHM/Cpanel, Plesk, ISPcp, ISPConfig, DirectAdmin, VirtualMin, Apache, MySQL, Postfix, Dovecot, Exim, Squid, OpenVPN, OpenSSL, Hadoop, Hbase, Solr, Redis, FFmpeg, FFmpeg-php, SugarCRM, ViciDial, VtigerCRM, Shell Scripting, Perl Scripting, PHP, RoundCube, SquerrileMail, Enterprise level Hosting/Mail Servers like Zimbra for large scale Setup with full security features and System Backups. I also have VOIP expertise and following are my favorite Asterisk PBX, SS7 Signaling,IVR Systems, Dictation Systems.  less

    freebsd linux-system-administration bash perl apache-administration centos whm cpanel plesk mail-server-implementation asterisk amazon-web-services vmware-esx mysql postgresql load-balancing amazon-ec2 00 more less
    • $16.67 HOURLY RATE
    • 4.9
    • 328 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 7 PORTFOLIO ITEMS
    • 2 TESTS
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