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Red Hat Administration Upwork freelancers typically receive a client rating of 4.71.

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Last updated: August 1, 2015

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  1. Mihai-George Cornateanu

    Mihai-George Cornateanu

    Senior Linux System Engineer

    United Kingdom - Last active: 5 months ago - Tests: 12 - Portfolio: 1

    Linux System Administrator. LAMP Administrator. Security expert - Senior Ethical Hacker. PCI Compliance expert. ✔ Apache ✔ PHP ✔ MySQL ✔ DNS ✔ FTP ✔ Samba ✔ Postfix / Qmail / Sendmail ✔ DomainKey / DKIM / SPF ✔ Courier / Dovecot (IMAP/POP) ✔ SpamAssassin / ClamAV Amavis ✔ Kernel Hardening & Securing ✔ IPTables ✔ Wordpress, Joomla, PHPBB, Drupal ✔ Bash scripting

    $30.00 /hr
    186 hours
    4.85
  2. Panayotis Tsiamis

    Panayotis Tsiamis

    Senior Systems and Software Engineer

    Greece - Last active: 6 days ago - Tests: 7 - Portfolio: 14

    Systems and Services Engineer, with 12+ years of working experience. Interested in researching, administrating, debugging, tuning and developing platforms running on UNIX like Operating Systems. Able to troubleshoot, identify and solve problems in software, network or kernel layer. Always willing to learn and experiment new technologies for creating high availliability platforms, that could described as "state of the art" or "cutting edge" technology. Specialties: • Unix Like Operating Systems Specialist (Solaris / Linux ). • TCP/IP Network technology • Very deep level of knowledge on Machines hardware and OS Kernels internals. • Troubleshoot/Tune/Debug; System Services, Operating Systems • Mail Services Expert, Qmail-Ldap Specialist. • Network: Cacti/MRTG, Nagios, Cisco Netflow • Databases: PostgreSQL / MySQL / Oracle / LDAP. • Programming: Perl, Ansi C, bash, awk, sed, php etc • Internet Services: mail, http, radius, ftp, ssh, irc etc.

    $30.00 /hr
    412 hours
    0.00
  3. Tigran Budaghyan

    Tigran Budaghyan

    Linux System Engineer, Politehnica University of Bucharest

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

    Linux System Administrator System engineer Network administrator Computer security Database administration IT Consulting Operating Systems: Linux (Debian/Ubuntu, CentOS/RHEL), Windows, Windows Server, Cisco IOS, Cisco ASA, Fortigate Web servers: Apache, Nginx Databases: MySQL, MsSQL, Oracle, MS Access Mail servers: Postfix, Exim, Sendmail, Dovecot, ClamAV, SpamAssassin Networking: TCP/IP, NAT, VPN, DHCP, Firewall, Routing, iptables, FTP, SSH, Active Directory, Domain Controller Virtualization: xen, kvm, virtualbox Scripting: bash/sh, vbs Backup: rsync Monitoring: Munin General Computer Skills: Microsoft Office (Word, Excel, PowerPoint)

    $15.00 /hr
    1,074 hours
    5.00
  4. Carlito, jr H.

    Carlito, jr H.

    Linux Administrator

    Philippines - Last active: 5 hours ago - Tests: 2 - Portfolio: 1

    I've been in the IT Industry for 13+ years now. I have been doing remote IT assistance to different companies here in the Philippines and the U.S. * Vicidial Installations and Maintenance * Linux / Unix Installation, Administration and Maintenance * Asterisk Installation, Admin and Maintenance * Backend Web Development * Database Administration (MSSQL, MySQL, Oracle, Sybase)

    $13.33 /hr
    3,668 hours
    4.42
  5. Duminda Karunaratne

    Duminda Karunaratne

    System Administrator

    Sri Lanka - Last active: 1 day ago - Tests: 3 - Portfolio: 1

    I am the member of the MIS team and covering all release managements and server operations. I currently handle ESXi and ESX server farm in Australia and USA. • Have experience installing, maintaining and troubleshooting VMWare servers.  ESXi and ESX Vsphere servers.  Installing, maintaining iSCSI software. (OpeanFiler / OPEN-E / HP LeftHand) • Have experience installing, maintaining and troubleshooting MS Windows Server 2008 and 2003.  Installing, maintaining and troubleshooting domain controller.  Have experience in Active Directory maintaining and troubleshooting.  Customizing Group Policies.  Scheduling Backups.  Domain Replications.  DFS Replications.  Installing, maintaining and troubleshooting IIS 7 and 6.  DHCP Server installation, maintaining. • Have experience installing, maintaining and troubleshooting MS Office SharePoint Server 2007 and 2010. • Have experience installing, maintaining and troubleshooting MS Exchange server 2010. • Have experience installing, maintaining and troubleshooting following software firewalls.  MS ISA Server 2006.  Untangle (Open Source)  SmoothWall (Open Source) • Have experience installing, maintaining and troubleshooting PLESK control panel and Cpanel. • Have experience installing, maintaining and troubleshooting UBUNTU/ CentOS / RedHat / SUSE Linux / Sun Solaris servers.  Installing Apache Server, Virtual hosting, Apache SSH configurations and Apache failover clustering.  Installing MySQL Server, MySQL data base replication and failover cluster.  Installing FileZilla FTP Server  Scheduling cron jobs.  ISC DHCP failover clustering. • Have experience installing Windows 7, Windows XP, UBUNTU, KUBUTU, and Fedora. • Have experience working with Amazon cloud computing and Soft Layer cloud computing. • Have experience in installing, maintaining and troubleshooting wireless network. • Can maintain and troubleshoot LAN environment. • Have experience installing MS SQL 2008 and 2005 servers. I’m maintaining daily backups in MS SQL servers and database management. • Have Experience installing and maintaining CISCO ASA 5505 Firewall, CISCO Routers and CISCO Switches.  Routing Protocol RIP, IGRP, RIP v2, EIGRP, OSPF  Creating Vlan  Nating  Creating VPN

    $16.67 /hr
    516 hours
    4.99
  6. Mohamed Zain

    Mohamed Zain

    Sr Linux Systems Engineer | Dev/Ops | Open source integration Engineer

    Egypt - Last active: 12 days ago - Tests: 10 - Portfolio: 3

    +7 years experience install / manage and operate linux servers on a high scale machines infrastructure , open source solution consultancy using Nginx / PHP-fpm,MySQL,Kannel SMS Gateway,Memcache/Redis, Couchbase ,ElasticSearch / Solr Nagios/lcinga/munin, Puppet, Chef, Bash Scripting, PHP, Ruby, Vagrant, Docker , Git, AWS , VOIP, Asterisk also i have experience in load&stress testing and security vulnerability assessment

    $25.00 /hr
    72 hours
    5.00
  7. Feeroz Khan

    Feeroz Khan

    Linux System Admin, Tech & Hosting Support

    India - Last active: 24 days ago - Tests: 3

    +5 years of proven experience in large Unix environments and servers. Good experience in Linux systems and application security with OS hardening. server optimization, server security, and server monitoring. Experience in Web Hosting domain. Here are some of my expertise areas. 1. Linux server support ( advance level) 2. Cloud administration and support 3. Solaris 10 Zoning 4. Oracle 10G basic installations 5. Tomcat/apache/Jboss 6. Monitoring tools ( Nagios, Zabbix,Cacti) 7. Basic servers creation and support like (NFS,Samba, send-mail,Apache,SVN,) 8. Server hardening 9. Linux firewall configuration ( TCP wrapper and IP-Tables ),Smoothwall 10. Test and staging server support and environments tuning. Applying patches and preparing environment behaviour reports for clients and management.

    $15.56 /hr
    436 hours
    4.26
  8. Arunkumar Krishna

    Arunkumar Krishna

    Middleware and Splunk Admin

    India - Last active: 12 days ago - Tests: 1 - Portfolio: 1

    • 2.6+ years of professional work experience in IT industry as Security Engineer and Middleware Administrator in JBoss and Linux in India. • Having 2.6+ years of domain expertise in Security and Automobile Industries. • Certified Splunk Knowledge Manager V-6. • Certified Splunk Administrator V-6. • Presently working on Splunk ES App and analysing security threats. • Working on app development for Splunk for various security technologies like firewall, proxy, Time attendance. • Created app for integrating DB logs and access data from tables to splunk Apps. • Hands on experience with Active Directory integration with splunk. • Well versed with maintaining a B2C websites with frequent release and automating the environment. • Strong knowledge of UNIX and Linux systems. • Ability to provide real-time technical support. • Ability to implement JBoss configurations. • Ability to develop and maintain service management. • And hands on writing scripts for monitoring the sites performance and availability of site 24/7 and integration with splunk. • Ability to implement tools like Splunk JBoss ON and RTI from the scratch. • Administering and configuring of Splunk, JBoss ON and RTI in a new environment.

    $50.00 /hr
    0 hours
    0.00
  9. Sandeep Desai

    Sandeep Desai

    Technical Analyst ( Jira, Confluence, Bamboo, FishEye, Linux, Unix )

    India - Last active: 16 days ago - Tests: 4

    I am a Redhat Certified Engineer (140-092-099) and Cisco Certified Network Associate (CSCO12118383). Technology is my passion! I have earned my own expertise on researching, putting into practice and testing many operating systems and softwares. I have technical support experience as well as customer service skills. I have total 5+ years of work experience. I worked as an Technical Analyst with ADP dealer services, providing support to Linux/Unix servers, Jira, Confluence, FishEye and Bamboo . I have handled e-mail, chat and back end support. My core competency is with Linux/ Unix Systems, Atlassian Jira and confluence configuration, customization and administration, Microsoft Operating Systems and Networking devices. Based on knowledge and experience gained many IT skills over the last 5+ years as Technical Support / IT Support Associate, I have developed a great expertise in many fields such as: Linux/Unix Systems like RHEL, CentOS, Ubuntu, Jira, confluence, bamboo, crowd Administration, Desktop and Technical support. I have great experience with installation, configuration and administration of different kind of operating systems like Red Hat Linux 5 / 6, CentOS, Fedora, Ubuntu, Kubuntu, Win Server 2003/2008, Windows XP, Vista, Win 7 and Win 8. Based on my friendly and communicative spirit I am sure I can fulfill all your requirements and expectations. LinkedIn: https://www.linkedin.com/in/sandeep4774

    $7.00 /hr
    0 hours
    0.00
  10. Romeo Maghanoy

    Romeo Maghanoy

    DevOps / EC2 Expert / AWS Consultant

    Philippines - Last active: 07/19/2014 - Tests: 18 - Portfolio: 7

    Over the last 5 years I have written websites in HTML, PHP, and JavaScript. My main skills lie in network administration, Linux system administration, electronics engineering, open source software, technical documentation and embedded systems design and development. I also provide development services. I have a wide range of experience on any languages that clients required. This allows me to be flexible on understanding and providing support on combos of both system and application level. * AWS management and automation/scripting * AWS CloudFormation * AWS Load-balance and Auto-scaling * AWS RDS * AWS Beanstalk * AWS OpsWorks * Chef * Puppet * CFEngine * Atlassians [Jira, Bamboo, Confluence, Bitbucket, HipChat, ...] * Network/System/Server Administrator (Linux/BSD/Windows) * Call Center Solutions (asterisk, vicidial, goautodial) * shell Scripting (powershell, bash, etc...) * Systems Security * .NET development (C#/VB) * Web development * Drupal * CakePHP * Wordpress * Continuous Translation (weblate[django]) * Bulk Marketing (ActiveCampaign, PHPList, Sendy) * RubyOnRails (Redmine, Discourse[emberjs]) * CRM (SugarCRM, CiviCRM) * QA * Office Management * etc...

    $15.56 /hr
    16 hours
    0.00