Linux System Administration Freelancers

Showing 4,851 freelancers

Linux System Administration Freelancers

Showing 4,851 freelancers

  • Senior web-developer

    During the last 6 years i develop software using many languages for different Operating Systems. I've worked with languages: PHP, Javascript, C\C++, Java, Perl, Python, Assembler. I've worked with different OS: Linux, Windows, FreeBSD. For data storage … more

    During the last 6 years i develop software using many languages for different Operating Systems. I've worked with languages: PHP, Javascript, C\C++, Java, Perl, Python, Assembler. I've worked with different OS: Linux, Windows, FreeBSD. For data storage i've used: MySQL(MariaDB), SQLite, PostgreSQL, MSSQL, MongoDB. I have experience developing applications for Android. I have also some application for development of MCU (MicroController Unit) devices (AVR). I have developed many kinds of web applications on different PHP frameworks and CMS for companies and small businesses. I have a lot of experience with HTML (HTML 5) and CSS (Sass). I have worked with template engines: Smarty, Twig. I've worked with frameworks/libraries: PHP - Kohana, Yii, CodeIgniter, FuelPHP Python - Django Javascript - JQuery, MooTools CSS - Twitter Bootstrap C++ - Qt (for cross-platform software), OpenCV library (background subtract, captcha recognize)  less

    php kohana yii-framework qt c++ assembly-language perl linux-system-administration database-design database-administration database-programming c sql mysql html bash css ajax javascript smarty 00 more less
    • $24.44 HOURLY RATE
    • 5.0
    • 13 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 8 TESTS
    GROUPS:
  • Drupal / PHP Full-time Freelancer with around 10 years of experience

    I have around 10 years of experience working with cutting edge tools like Drupal, PHP, Moodle, Ubercart, Drupal commerce, Apache SOLR, Google Search Appliance (GSA), Drupal COD, Open Atrium, etc and built web applications ranging from corporate websites to high … more

    I have around 10 years of experience working with cutting edge tools like Drupal, PHP, Moodle, Ubercart, Drupal commerce, Apache SOLR, Google Search Appliance (GSA), Drupal COD, Open Atrium, etc and built web applications ranging from corporate websites to high traffic social network portals. To know more about me and my professional experience, kindly visit http://www.surendramohan.info/ . Roles handled: 1. Drupal Developer 2. Drupal Lead 3. Drupal Architect cum project lead 4. Project manager/Delivery manager cum drupal architect Additional activities: 1. Technical and user reviewer of Drupal books with Packt Publishing 2. Author at Packt Publishing (Administrating Solr) - http://www.packtpub.com/administrate-monitor-and-optimize-solr-using-drupal-associated-scripts/book 3. Author at Packt Publishing (Apache Solr High Performance) - http://www.packtpub.com/apache-solr-high-performance/book 4. Active member of Drupal association 5. Active contributor to drupal initiatives especially Drupal 8 6. Technical blog writing 7. Organizer of Drupal events, meetups, camps, etc held at Mumbai and Pune, India 8. Speaker at Drupal meetups, events, camps, etc held at Mumbai and Pune India. 9. Corporate Trainer (Drupal, Moodle and GSA)  less

    drupal php mysql moodle oscommerce joomla html5 css3 xhtml css magento wordpress mediawiki ecommerce-consulting linux-system-administration web-design website-development website-wireframing seo google-analytics 00 more less
    • $16.67 HOURLY RATE
    • 4.9
    • 217 HOURS
    • INDIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 7 TESTS
  • Senior Linux Systems/Database Administrator

    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 … more

    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.  less

    mysql amazon-ec2 amazon-s3 amazon-rds amazon-web-services postfix qmail lamp-administration database-administration python bash nginx nagios email-handling performance-tuning linux-system-administration ubuntu redis centos 00 more less
    • $28.00 HOURLY RATE
    • 5.0
    • 233 HOURS
    • EGYPT
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 3 TESTS
  • C/C++ Java Audio Image Processing DSP Computer Vision UML Qt Analyst

    Computer Engineer well experienced in designing and coding software in C/C++ and Java. Several years of hands-on experience in developing complex technical and multimedia applications on Windows and Linux platforms with a specialization in the audio and image processing … more

    Computer Engineer well experienced in designing and coding software in C/C++ and Java. Several years of hands-on experience in developing complex technical and multimedia applications on Windows and Linux platforms with a specialization in the audio and image processing fields. Good knowledges of OOAD and UML for professional requirements gathering, analysis and prototyping, DSP, Computer Vision and data analysis/visualization. Familiar with web technologies such as HTML, CSS, Java EE (servlets, jsp).  less

    c++ java jsp uml html artificial-intelligence computer-vision image-processing opencv algorithms data-analysis multithreaded-programming qt computer-networking linux-system-administration windows-app-development audio-editing matlab 00 more less
    • $50.00 HOURLY RATE
    • 4.6
    • 608 HOURS
    • AUSTRALIA
    • LAST ACTIVE
    • 7 PORTFOLIO ITEMS
    • 7 TESTS
  • Professional JavaEE development and Consulting

    Over 7 years of experience in delivering enterprise solutions in e-government, workflow and web based arena.Expertise in conceptualizing, designing and coding technical solutions using Java/J2EE technology stacks. In depth exposure to Web 2.0 solutions, developing webservices,OOAD … more

    Over 7 years of experience in delivering enterprise solutions in e-government, workflow and web based arena.Expertise in conceptualizing, designing and coding technical solutions using Java/J2EE technology stacks. In depth exposure to Web 2.0 solutions, developing webservices,OOAD architecture and modeling and designing artifacts to satisfy peculiar and complex business problem statements.Excellent analytical and communication skills in order to work with mid-size teams, technical and business leadership. - Experience in modeling complex web application using RUP and XML. -Strong experience in class diagram, sequence diagram,component diagrams and activation diagrams. -Strong Programming Skills in designing and implementation of multi-tier applications using Java, J2EE, JDBC, JSP, JSTL, HTML, JSF, Struts2, JavaScript, Servlets, JavaBeans, CSS, XSLT, JAXB. -Experience in developing Web Services using - SOAP, WSDL and developing DTDs, XSD schemas for XML (parsing, processing, and design). -Experience in working with BEA Web Logic and Apache Tomcat6x application servers. -Strong experience in all the phases of software development life cycle including requirements gathering, analysis, design, implementation, deployment and support. -Experience in OOAD architecture and modeling and designing artifacts using Rational Rose UML such as class diagram, sequence diagram and state diagrams using Rational Rose, RAD and Power Designer. -Experience in developing and deploying session beans, entity beans representing different types of business logic abstractions. -Experience in Java design patterns such as Session Facade, Singleton, Data Access Objects (DAO),Observer, Factory, Strategy, Decorator and Business Delegate. -Experience in writing DAO using Hibernate and Hibernate mapping files. -Experience in dynamically generating graphical PDF reports using IText1.1 and excel reports using apache POI. -Experience in software testing, Junit testing, regression testing, defect tracking -Excellent written and verbal communication skills, presentation and problem solving skills. -Experience in image processing and recognition. -Strong communication & relationship management skills, enthusiastic & self-driven, with a high degree of commitment.  less

    java j2ee jsp mysql xml weblogic hibernate eclipse javascript swt jms jquery apache-struts apache-tomcat oracle-database gwt linux-system-administration 00 more less
    • $33.33 HOURLY RATE
    • 4.9
    • 350 HOURS
    • JORDAN
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 7 TESTS
  • Ruby on Rails Senior Developer

    Over the last 6 years, I have developed a wide range of websites using Ruby on Rails sites for startup companies and small businesses. I'm experienced in using any Rails version with newest Ruby version, Javascript framework, node.js … more

    Over the last 6 years, I have developed a wide range of websites using Ruby on Rails sites for startup companies and small businesses. I'm experienced in using any Rails version with newest Ruby version, Javascript framework, node.js, Unix system, most of famous database engine. I also have experience on PHP using with most famous of framework.  less

    php cakephp ruby ruby-on-rails database-design mysql mongodb rspec cucumber selenium linux-system-administration ubuntu javascript jquery node.js html5 html 00 more less
    • $15.00 HOURLY RATE
    • 4.0
    • 753 HOURS
    • INDONESIA
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 3 TESTS
  • Mr.

     Design and implementation of Vmware ESX and ESXi Server/ Vsphere and other virtual technologies (VMotion, SVMotion, VHA, SVHA, FT, DRS, Power Management etc.)  Performs the tasks of designing Advanced Security & Management Solutions.  Design and implementation of DNS Servers, Unbound DNS … more

     Design and implementation of Vmware ESX and ESXi Server/ Vsphere and other virtual technologies (VMotion, SVMotion, VHA, SVHA, FT, DRS, Power Management etc.)  Performs the tasks of designing Advanced Security & Management Solutions.  Design and implementation of DNS Servers, Unbound DNS Server, Kerio Mail Servers, Send Mail Server, TACACS Server, CRM System, DOCSIS Cable Modem Termination System, Incognito DHCP Broadband Command Centre for CMTS.  Bandwidth management for Optical Fibre customers on Routers and Switches, Monitoring of links by using network performance monitoring tools such as Cacti, Manage Engine Netflow Analyzer, Solar Winds, Smonitor, Nagios etc  Implementation of routed & routing protocols, like OSPF, BGP, EIGRP in live environment  Worked on Cisco 2950, 2960, 3550, 3560, 3750, 6509 switches and 2500, 2600, 2800, 3600, 3700, 7200,  7600 series Routers in real environment approx. 500 Hours.  Implementation of (VLANs, VTP, RSTP, MSTP, ETHERCHANNEL, INTER VLAN ROUTING, HSRP, PRIVATE VLAN, SWITCH PORT SECURITY)  Design and implementation of VPNs ( Site-Site, Remote Access, DMVPN, IPSec over GRE, Get Vpn)  Design and implementation of MPLS VPNs  Management of CAR on routers and switches by rate limited feature  Design and implementation of (AAA with Local & Remote ACS Server, 802.1 x authentications, Proxy Authentication).  Design and Implementation of Microsoft Active Directory 2003 based on Microsoft best practices. Implementation of Anti virus Servers (Kaspersky, Sophos) in a medium sized company  Design and Implement SAMBA server using LDAP authentication for LAN users.  Design and Implementation of Send Mail Servers, MS Exchange e Server 2003/2007 based on Microsoft best practices.  Design and Implements SQUID 2.4, 3.1 Proxy Server based on Centos, Red Hat OS.  Implementation of different Network Performance monitoring tools such as (Cacti, Net Flow, Manage Engine OpUtils, SMonitor, Solar Winds, Nagios, JFF) to monitor WAN devices and different servers to optimize network resources and traffic.  Design and implementation of SIP on cisco voice gateways.  Design and implementation of MPLS VPNs  Support and Maintain Cisco Core Routers 7206VXR. 7600 Series, 2800 Series, small business series RV042, RV082 for vpn connectivity.  Supporting and Managing HEC Cisco Core and Edge Switching network.  Design and Implements SQUID 2.4, 3.1 Proxy Server based on Centos for differnet clients.  Deploy cacti, solar wind, cisco works Monitoring System to monitor Network and Bandwidth Usage.  Management of CAR on routers and switches by rate limited feature.  Design of Networking Infrastructure and resource sharing solution. The project covered the design of networking system, Servers, and applications in Windows 2003 environments. The project used TCP/IP as Network protocols and Star Topology.  Conduct Surveys on client sites and create project proposal and layouts for networks deployment and implementation.  Design and Implementation of BGP/MPLS, Traffic Engineering, Policy Based Routing PBR, Route Filtering, Redistribution, Route Summarization.  Catalyst IOS based Switches, VTP, STP, RSTP, Trunking, VLANs,  Layer 3 Switches, Logical Etherchannels, MLS.  IPSec, VPNs, AAA Model (RADIUS, TACACS+, Kerberos), Cisco PIX / ASA  Firewall, VPN Client, Juniper Firewall SSG5, SSG20  Design and Implementation of Incognito DHCP Server for assigning bandwidth to cable modem customers.  Media: Ethernet, FastEthernet, GigabitEthernet, FDDI, CDDI, Token Ring, ATM LAN Emulation.  Network Analyzers: Back Track 5 , Ethereal, Paketyzer, Radcom, Etherpeek.  Load Generator: Spirent Smart Bits, iperf, IPTraffic.  Leased lines 64k - 155Mb (PPP / HDLC), Channelized lines (E1 ), Fibre Optic Circuits, Frame Relay, xDSL, Load Balancing, Multi Homing, Satellite links. I also have extensive experience in following  Linux & Windows Integration in TCP environments  Expertise Linux Redhat, Ubuntu, SUSE, Centos, Debian, Slackware and Solaris Systems  Expertise in SQUID Proxy server. DNS Server, DHCP, Send Mail, Kerio Mail Server.  VMware ESX Server, Virtual Center, Distributed Resource Scheduling (DRS), VMware Data Backup , VMware Converter, VMotion, SVMotion, VHA, SVHA, FT, DRS, Power Management etc.  less

    asterisk linux-system-administration dns mail-server-implementation squid pfsense dhcp network-security solaris-administration windows-administration microsoft-exchange-server samba cisco-asa cisco-routers juniper-routers vpn mpls vmware-esx sendmail 00 more less
    • $11.11 HOURLY RATE
    • 4.5
    • 78 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 3 TESTS
  • Sr. Software Developer / Software Development Manager

    Over the past 10 years I've developed software both professionally, and as a hobby. I enjoy working on more than just my daily grind, so I've come here for a little something extra. Do you have an interesting … more

    Over the past 10 years I've developed software both professionally, and as a hobby. I enjoy working on more than just my daily grind, so I've come here for a little something extra. Do you have an interesting project? Read on, I may have the skills you need. Let's talk desktop/back-end development: C#, Ruby, Go, C, Objective-C, Powerbuilder, SQL (ANSI/MSSQL), Perl. Those aren't languages I've just spent a few hours on; I've shipped products or currently maintain projects in those languages. How about web development? I love writing responsive, cross-browser/cross-platform sites that work as well on the desktop as they do on your phone or tablet. It's a great challenge to stay ahead of the curve.  less

    c# .net-framework sql microsoft-sql-server-development microsoft-sql-server-administration powerbuilder javascript jquery coffeescript objective-c ios-development computer-networking linux-system-administration node.js postgresql ruby sinatra-framwork perl 00 more less
    • $111.11 HOURLY RATE
    • 5.0
    • 173 HOURS
    • UNITED STATES
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 2 TESTS
  • Senior Systems Admin, Network Admin

    An IT Professional with over 12 years hands on experience on Systems, Servers and VMWare administration. Specialties: 1. Windows Server 2008 2. Microsoft Exchange Server 5.5, 2003, 2007, 2010 3. Anti-virus/Malware removal 4. Active Directory, DNS, DHCP, File … more

    An IT Professional with over 12 years hands on experience on Systems, Servers and VMWare administration. Specialties: 1. Windows Server 2008 2. Microsoft Exchange Server 5.5, 2003, 2007, 2010 3. Anti-virus/Malware removal 4. Active Directory, DNS, DHCP, File Services, DFS, WSUS administration and troubleshooting 5. Network configuration(tcp-ip/cisco ios/monitoring) 6. Symanted Backupexec, Acronis, Appassure Replay 7. VPN and Remote access 8. Disaster Recovery, from bare metal restores, to VMware rebuilds  less

    windows-administration vmware-administration cisco-ios mail-server-implementation lamp-administration microsoft-exchange-server microsoft-small-business-server-administration domain-migration disaster-recovery vmware-esx google-apps google-sites-administration postgresql linux-system-administration centos postfix apache-administration mysql 00 more less
    • $50.00 HOURLY RATE
    • 5.0
    • 101 HOURS
    • CANADA
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 4 TESTS
  • Experienced Android , Titanium Consultant - Enigineer

    Creative, highly organized candidate; expert in the design, development, and delivery of cost-effective, high-performance technology solutions. Extensive qualifications in all facets of project lifecycle development. Proven ability to integrate out-of-the-box thinking and problem-solving analysis to improve processes, systems and methodologies … more

    Creative, highly organized candidate; expert in the design, development, and delivery of cost-effective, high-performance technology solutions. Extensive qualifications in all facets of project lifecycle development. Proven ability to integrate out-of-the-box thinking and problem-solving analysis to improve processes, systems and methodologies. Summary of Technical and Personal Skills • Worked on Android mobile operating system and Titanium framework. • Worked on java frameworks strut 2, String 2, ibetis, GSON, Apache Wink. • Ability to develop unique, cutting edge applications for different handset and user requirements. • In-depth knowledge of industry practices and application development protocols. • Knowledge of application testing, debugging and troubleshooting. • Ability to work for long hours without losing patience and enthusiasm. • Passionate to update my knowledge and skills though continuous self-learning.  less

    moodle appcelerator-titanium android-app-development joomla drupal php mysql wordpress seo apache-struts spring-framework core-java adobe-dreamweaver adobe-fireworks jquery photography linux-system-administration ios-development amazon-s3 phpmyadmin 00 more less
    • $11.11 HOURLY RATE
    • 4.4
    • 460 HOURS
    • SRI LANKA
    • LAST ACTIVE
    • 12 PORTFOLIO ITEMS
    • 8 TESTS
    GROUPS:
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