Red Hat Enterprise Linux (RHEL) Freelancers

Showing 42 freelancers

Red Hat Enterprise Linux (RHEL) Freelancers

Showing 42 freelancers

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Last updated: March 1, 2015

  • Network and System Adminstartor (RHEL/CentOS Linux, Debian/Ubuntu)

    Personal Data Born date: 19 June 1976: 1a quarter, 2 building, 52 apartment, Charentsavan, Kotayq region, Armenia, 378562 Phone: (+37493)190611 E-mail : mkhitar@gmail.com Education: June 2002. Have completed PhD Thesis at Yerevan Physics Institute and have degree of … more

    Personal Data Born date: 19 June 1976: 1a quarter, 2 building, 52 apartment, Charentsavan, Kotayq region, Armenia, 378562 Phone: (+37493)190611 E-mail : mkhitar@gmail.com Education: June 2002. Have completed PhD Thesis at Yerevan Physics Institute and have degree of Doctor of Physics. Oct.1998. oct.2001. PhD student of Theoretical Physics Department at Yerevan Physics Institute. Sept.1993. June 1998Ã. Yerevan State University, Theoretical Physics Department Scientific workshops: 15.08.2002-21.08.2002 UNESCO workshop: “Integrablility in QFT and Quantum Statistics” (Tbilisi, Georgia) 02.06.2003 - 10.06.2003 Summer school on mathematics in string and field theory at ICTP (Trieste, Italy) Work experience: December 13 2010 – to present Head of IT Administrators Group Network and system administrator Linux (CentOS) an d Windows 2008 Based corporate network ( Active Directory, Gateway, VPN server (ipsec from Linux to Cissco, Linux-Linux via ipsec and pptp), Apache, MySQL Database Administration, Mail, FTP and SFT Servers, Linux based SMS Gatway (kannel), basics of traffic shaping, Proxy Server ( Squid, Kerio, Traffic Inspector) iptables ). ACRA Credit Reporting Bureau October 2001 – to present Scientific researcher: Yerevan Physics Institute, Theoretical Physics Department February 2010 – June 2010: Network and System Administrator, Technical Support for billing system customers “Zang Telecom” LLC Monitoring corporate network (Windows Active Directory, company mail server, proxy server, DNS server (FreeBSD based). Network containing amount 10 computers, mail server, NAT (hardware and sofware based realesation of NAT, Cisco routers and smart switchs), hardware and software support. March 2009 – February 2010 Network and system Administrator Georisk LTD and IGS NSA RA Monitoring corporate network (Windows Active Directory, company mail server, proxy server, DNS server, FreeBSD7.0 based proxy and DNS server ). Purchase hardware for company, do technical support for company employers. Network containing amount 80 computers, DNS, mail and Proxy servers, NAT, IT security, hardware and software support. FreeBSD 7.0 based gateway. 03.05.07 - 01.11.2007 Converse Bank CJSC Charentsavan branch as loan officer 01.12.06 - 01.05.2007 "AMC" LTD Administrator of the FreeBSD 4.0 based web hosting server (Appache) 15.05.2006-15.09.2006 “Ponte Solutions” LTD as physicist researcher (in the cool plasma physics area associated with plasma etching and plasma chemistry questions) 12.2004 - 06.2005 Network Administrator (on SuSE 9.1 Linux machine) at Aghayants ev. Word. LTD 2000-2001 Leading specialist at the Software Provision Department at Emergency Management Administration at Government of Republic of Armenia Language Armenian and Russian (fluent) English (technical) Computer experience: MS Windows 2000,XP,7,8 MS Office 2000/XP/2007, AS-Bank 3.0, MS Windows 2000, 2003, 2008, 2012 Servers (basics of Active Directory), MS Office XP/2003,2007 Linux (Red Hat 7.3, 8.0, 9.0, Redhat EL 4,5,6 Fedora Core 4-18 CentOS 5.x,6.x (advance), FreeBSD 4.5, 5.1, 6.0,7.0,7.2,7.3,8.0, Ubuntu/Debian), TCP/IP protocols, basics of programming with C++, (MS Visual Studio 6, 2005, 2008, Borland C++ Builder 6, C Builder X), knowledge of Linux/Unix servers (Squid, DNS, SSH servers, Apache, PostFix Sendmail, PF, Linux SHELL scripting, iptables, iproute2, tc, load balansing), wireless network, VoIP technlogicts and equipments, HPEM (Hybrid plasma equipment model), MCFP (Monte-Carlo feature profile model), PCMC (Plasma chemistry Monte-Carlo Simulation); Basic principles of CMOS designing. Scientific publications: 1 D. Arnaudon, D. Karakhanyan, M. Mirumyan, A. Sedrakyan and P. Sorba J.Phys. A: Math. Gen. 35 (2002) 2353-2359. 2 J. Ambjorn, D. Karakhanyan, M. Mirumyan and A. Sedrakyan Nucl. Phys. B 599 (2001) 547-560. 3. М. Мирумян "Модель Уймина-Лая-Сазерлэнда спина 3/2 в терминах фермионных операиоров рождения и уничтожения "Известия НАН Армении т.37, 4 (2002). 4. М. Мирумян «Фермионная модель Уймина-Лая-Сазерлэнда спина 1» Препринт ЕрФИ 1576(1) 2002. 5. D. Karakhanyan, R. Kirschner and M. Mirumyan Nucl.Phys. B636 (2002) 529-548; nlin.SI/0111032. 6. D. Arnaudon, D. Karakhanyan, M. Mirumyan, A. Sedrakyan, P. Sorba J.Phys. A35 (2002) 2353-2360.  less

    nagios rhel centos apache-administration iptables fedora lamp-administration ubuntu mysql ipsec mikrotik-routeros vpn 00 more less
    • $16.67 HOURLY RATE
    • NO FEEDBACK GIVEN
    • 0 HOURS
    • ARMENIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 5 TESTS
  • senior sys admin looking for new challenges

    Working as a full-time system administrator with an extensive experience of over 5+ years in high-availability-24x7-medium-large environments. Disaster recovery, state of the art security (PCI-DSS), top-notch database clusters, large deployments scalable both horizontal and vertical. Passion driven individual with strong IT educational background (college + university) looking for new challenges.

    bash-shell-scripting linux-system-administration ubuntu centos rhel microsoft-active-directory apache-administration nginx apache-tomcat squid 00 more less
    • $38.89 HOURLY RATE
    • NO FEEDBACK GIVEN
    • 0 HOURS
    • GERMANY
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 0 TESTS
  • Linux/UNIX DevOps Engineer

    For over the past 16 years, I have honed and developed my Linux/UNIX system administration skills working from technical support to network operations center engineer to senior systems administrator. I've managed small server footprints for small businesses to … more

    For over the past 16 years, I have honed and developed my Linux/UNIX system administration skills working from technical support to network operations center engineer to senior systems administrator. I've managed small server footprints for small businesses to large government footprints spanning the globe. For the past 8 years I've been the outsourced IT department for several small business in which time I've been able to trim their IT infrastructure budgets saving them money and time to devote to their other business needs along building a solid base of clients for my consulting company. Our guiding philosophy is to do the job right the first time, in time and under budget. I set my rate at what I feel my time and skills are worth. If you contact requesting I consider your job offer understand that my rate will be as posted on my profile so don't waste my time if you think my posted rate is too high as that will be what I submit to you. If you want a skilled, knowledgable senior Linux engineer with DevOps experience you have to understand that doesn't come cheap.  less

    linux-system-administration ubuntu rhel puppet-administration hadoop ruby ruby-on-rails python nagios zabbix mysql postgresql latex amazon-ec2 amazon-rds amazon-s3 amazon-web-services vmware-administration vmware-esx git subversion ldap apache-tomcat apache-administration atlassian-jira atlassian-confluence wordpress eucalyptus-cloud load-balancing network-security security 00 more less
    • $83.33 HOURLY RATE
    • NO FEEDBACK GIVEN
    • 0 HOURS
    • UNITED STATES
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 4 TESTS
    ASSOCIATED WITH:
  • Software and Operations Engineer

    Experienced backend software and operations specialising in linux based operating systems, cloud based environments, distributed architectures and databases. In depth understanding of high level networking protocols, specifically around mobile / low power devices, and high latency, low bandwidth networking environments.

    node.js php go-programming-language linux-system-administration ubuntu rhel amazon-web-services postgresql api-development 00 more less
    • $111.11 HOURLY RATE
    • NO FEEDBACK GIVEN
    • 0 HOURS
    • UNITED KINGDOM
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 0 TESTS
  • System administrator (Linux/Unix)

    OS: Linux: RHEL/Fedora/CentOS, Debian/Ubuntu FreeBSD 6.x, 7.x, 8x Software: Apache, nginx, Squid, dhcpd, Bind, Unbound, OpenLDAP, OpenVPN, mpd, pf, iptables, Postfix, Dovecot, Samba, pure-fptd, vsftpd, Subversion, Puppet, LVS (ldirecord), Heartbeat, Pacemaker/Corosync, Bacula, Zabbix, MySQL … more

    OS: Linux: RHEL/Fedora/CentOS, Debian/Ubuntu FreeBSD 6.x, 7.x, 8x Software: Apache, nginx, Squid, dhcpd, Bind, Unbound, OpenLDAP, OpenVPN, mpd, pf, iptables, Postfix, Dovecot, Samba, pure-fptd, vsftpd, Subversion, Puppet, LVS (ldirecord), Heartbeat, Pacemaker/Corosync, Bacula, Zabbix, MySQL, PostgreSQL, PgPool, KVM, OpenVZ, RabbitMQ Programming languages: Shell/Bash; Basic knowledge Perl, PHP, Ruby, SQL Package creation/maintanace: RPM, DEB  less

    linux-system-administration nginx apache-administration mysql puppet-administration rhel openvpn iptables postfix zabbix openvz kvm-virtualization bash-shell-scripting clustering virtualization 00 more less
    • $33.33 HOURLY RATE
    • 5.0
    • 2 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • Professional Server Help (Linux Administrator)

    Melbourne based System Administrator with expertise in Linux Server optimization, security and service deployment on VPS/Physical, Cloud Platforms(AWS,Rackspace). I believe in getting the job done with the best possible quality. Period. Clear timely communication with the clients … more

    Melbourne based System Administrator with expertise in Linux Server optimization, security and service deployment on VPS/Physical, Cloud Platforms(AWS,Rackspace). I believe in getting the job done with the best possible quality. Period. Clear timely communication with the clients and their team is always my priority. I have been working with all the major providers: Rackspace, Amazon, Softlayer, Godaddy, Hostgator, Bluehost, Linode, DreamHost, Mediatemple, Lunarpages. Expertise in Linux Administration is as follows (but not limted to) Server Distributions: RedHat, Centos, Fedora, Debian, Ubuntu, Gentoo, Suse, Mandriva, Opensuse, Knoppix, Slackware. Web servers: Apache, Lighttpd, Nginx, Tomcat File servers: Proftpd, Pureftpd, Vsftpd, Sftpd, TFTP, NFS, Samba DNS servers: Bind9, MyDNS, NSD Mail servers: Postfix(TLS,SASL), Exim, Sendmail, Qmail, Dovecot, Courier. Logging services: Syslog, Rsyslog, Syslog-ng Proxy servers: Squid(forward and reverse proxy), nginx, pound, lighttpd. Firewalls: Iptable scripts and Advance Policies Firewall with bruteforce detection. Firewall configuration: NAT, IP Masquerade Jabber servers: Openfire, Ejabberd, Djabberd Database servers: MySQL, Postgresql Backup: Bacula, bash scripts. VPN: PPTP Virtualisation: Openvz/Virtuozzo, Xen, Qemu, KVM, VMware Server, Parallels Workstation, Virtualbox headless, HyperVM. Monitoring: Nagios, munin, zabbix, zenoss Automation: Puppet(fan), custom bash scripts. Revision control: Git(fan), Subversion Package management: yum, rpm, dpkg, aptitude, apt-get, emerge Security: Nessus, John The Ripper, Tiger, PGP, GPG, nmap, Openvas, Snort, Ettercap, arpwatch, SSH, SSL, TLS, TCP Wrappers, Ethereal, dsniff, tcpdump, portsentry, rkhunter, chkrootkit, clamav, SPF, Spamassassin, domain keys. Cloud computing: Amazon (EC2, EBS, S3, CloudWatch), Rackspace services. Assessment tools: sar, vmstat, iostat, mpstat, netstat, iptraf, iftop, lsof, ntop, serverstats Misc services: NTP, Cups, DHCP, Dnsmasq  less

    lamp-administration apache-administration linux-system-administration postfix whm iis unix-shell mysql vpn nagios munin ftp cpanel plesk nginx postgresql lighttpd subversion puppet-administration ssh iptables drupal wordpress domain-migration mail-server-implementation openvz virtualization redmine amazon-ec2 amazon-web-services amazon-s3 rackspace-cloudservers virtuoso bash exim firewalls ssl centos ubuntu security email-deliverability-consulting mailenable ffmpeg atlassian-jira python rhel 00 more less
    • $70.00 HOURLY RATE
    • 5.0
    • 1809 HOURS
    • AUSTRALIA
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 1 TEST
    ASSOCIATED WITH:
  • 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.  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
    • 494 HOURS
    • GREECE
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 10 TESTS
  • Expert web-developer (frontend+backend), linux system administrator

    I have experience with wide range of technologies but my specialization is web development. I'm proficient in both frontend and backend development of web applications. I have much knowledge regarding administration of linux systems including Ubuntu/CentOS and a … more

    I have experience with wide range of technologies but my specialization is web development. I'm proficient in both frontend and backend development of web applications. I have much knowledge regarding administration of linux systems including Ubuntu/CentOS and a wide variety of server software.  less

    php c++ html css bash mail-server-implementation git apache-tomcat apache-administration linux-system-administration mysql sqlite qt gps-development dhcp ssh ftp ssl postfix smtp dns ukrainian russian seo autodesk blender3d open-office html5 css3 jquery cad-design xmpp xml solaris-administration ubuntu centos gimp smarty firewalls squid amazon-ec2 regular-expressions joomla wordpress javascript python rhel guitar-performance 00 more less
    • $40.00 HOURLY RATE
    • 4.9
    • 1045 HOURS
    • UKRAINE
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 13 TESTS
    GROUPS:
    ASSOCIATED WITH:
  • Senior System Administrator

    One of TOP10 freelance system administrators in Russia: https://www.free-lance.ru/users/psaux/opinions/ Highly skilled system administration expert with more than 10 years of professional background. Experience in hosting companies, software development companies, government sector. Good in firewalls … more

    One of TOP10 freelance system administrators in Russia: https://www.free-lance.ru/users/psaux/opinions/ Highly skilled system administration expert with more than 10 years of professional background. Experience in hosting companies, software development companies, government sector. Good in firewalls, IDSes, white hat and black hat security testing, DDOS protection. Providing 24x7 uptime service. My target is to achieve BEST PERFORMANCE of servers with a decent SECURITY level. My motto is: "best system administrator work is when you don't need him in the future".  less

    linux-system-administration freebsd openbsd cisco-asa apache-administration nginx mysql security network-security virtualization vpn apache-tomcat awk bash cpanel exim firewalls iis iptables isa-server jquery ldap mail-server-implementation microsoft-exchange-server microsoft-hyper-v network-administration oracle-database performance-tuning perl pfsense plesk php postfix postgresql python redmine rhel ruby ruby-on-rails sendmail snort squid sql subversion ubuntu varnish-cache vmware-esx wowza-media-server xhtml zabbix 00 more less
    • $22.22 HOURLY RATE
    • 4.7
    • 0 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 10 TESTS
  • Ruby On Rails developer

    Last 2 years I'm working with linux, nosqls and ror projects. I have enough experience to help to develop highload website based on linux servers. I'm a fast learn fast and always ready to work on interesting tasks … more

    Last 2 years I'm working with linux, nosqls and ror projects. I have enough experience to help to develop highload website based on linux servers. I'm a fast learn fast and always ready to work on interesting tasks. I am looking for any opportunity to help you create a website to optimize the speed of the server or create a native application. Also I am have some experience in linux kernel module development, nosql, data recovery.  less

    ruby linux-system-administration ruby-on-rails bash-shell-scripting nginx c centos rhel amazon-ec2 actionscript-3 00 more less
    • $20.00 HOURLY RATE
    • 5.0
    • 0 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 1 TEST
    ASSOCIATED WITH:
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