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Post your Linux system administration project on Upwork and find Linux experts and system administrators to assist you with your Linux server installation, configuration, maintenance and technical support tasks. These experienced consultants can manage your Linux network and infrastructure security or perform backups and security scans or updates and identify threats on your Linux OS system. They can also deploy web applications, eCommerce systems and content management systems on your Linux server, or migrate your virtual machine to a physical Linux server. You can also find a professional Linux sysadmin, experienced in system monitoring and control tools, to manage and optimize your Linux-based server farm.

Linux is a collection of free and open-source, cross-platform, Unix-like operating system distributions, among which the most widely known are Ubuntu, Red Hat and Slackware. On Upwork, the world’s largest online workplace, you can find experienced Linux system administrators to set up dedicated Linux web servers, install web hosting control panels (like ZPanel, Plesk, cPanel or DirectAdmin), set up SQL databases and file managers or configure Linux server security and accounts.

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Last updated: October 1, 2015
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Valeriy Ryzhkov

Valeriy Ryzhkov

Linux Administrator

Czech Republic - Tests: 1

8 years of experience in the IT related field. Strong knowledge of current and emerging technologies. Сross-platform experience in systems administration, including analysing, designing, installing, maintaining and repairing hardware, software, peripherals, and networks. Profound knowledge and experience in administering Linux operating systems and applications. Superior troubleshooting and technical support abilities with migrations, security and database applications.

$15.56 /hr
0 hours

Murilo Goulart

Murilo Goulart

Systems Administrator


A highly competent Systems Administrator with 16 years of practical experience in designing, maintaining and deploying ICT infrastructure solutions, certified by major software companies such as VMware and Microsoft and highly regarded by well-known companies from a diverse range of industry sectors due to important contributions and unconditional commitment to many projects. My areas of expertise are: - Infrastructure Architecture - Virtualization .............................. (VMware, Hyper-V) - Cloud Computing ..................... (SaaS: Google Apps, Office 365; IaaS: Amazon AWS, MS Azure) - Operating Systems ................... (Linux, Windows, OpenBSD, OS X) - Server and Storage Admin .... (IBM, HP, 3PAR, Dell) - Web and App Servers ............. (WildFly/JBoss, Glassfish, Tomcat, Jetty, Apache HTTPD, Nginx) - Networking Peripherals .......... (Cisco, H3C/3COM, D-Link, Brocade) - Network Services ..................... (DHCP, DNS, Caching Proxy, FTP, VPN, IPSec, MS AD, WSUS) - Cybersecurity ............................ (PF, OpenBSD; Iptables, Linux; Forefront TMG/ISA, Microsoft) - Collaboration Suite .................. (Zimbra, MS Exchange, MS SharePoint) - Backup & Recovery .................. (HP Data Protector, IBM TSM, Bacula) - High Availability ........................ (VMware SRM, MS Cluster Service, Oracle Clusterware/RAC) - Scripting & Query Language . (Bash, SQL) I also have significant experience in and huge curiosity about: - Relational Database Management Systems . (Oracle, MS-SQL, PostgreSQL, MySQL) - NoSQL ...................................................................... (Couchbase, Cassandra) - Web Application Development ........................ (Java, JSF, JPA, EJB, JAAS) - JEE Application Servers ..................................... (WildFly/JBoss, Glassfish) Feel free to get in touch with me, it would be great hear from you!

$13.00 /hr
0 hours

Inar I.

Inar I.

Dynamics CRM Specialist

Latvia - Tests: 2

• 5+ years of Dynamics CRM (3.0, 4.0, 2011, 2013, 2015 OnPremise/Online) expertise with development in Microsoft Gold Partner environment. • Key technical support for 6 successful roll-outs. • Full lifecycle experience in developing 3 Dynamics CRM solutions. • Discovered 1 critical bug in Dynamics CRM product line. • Completed 2 certification exams (MB2-631, MB2-633). • Worked with cross-geographical teams, with total of 5 different countries (Germany, Sweden, Estonia, Latvia, Russia).

Groups: Microsoft Certified Professionals

$22.22 /hr
0 hours

Fadi A.

Fadi A.

Sr. Linux Systems Administrator (RHCE, RHCSA, CEH, Security+, SSCP)

United States - Tests: 1

I am a GNU/Linux systems administrator with solid knowledge in networks and security fields. I worked in several enterprise projects and played several roles such as systems administration, applications integration, development and information security. I'm currently working with one of the biggest U.S online travel companies (Orbitz) Holding B.Sc degree in Computer Science and M.S degree in Computer Information Systems. I'm a Redhat Certified Engineer, with strong development and scripting skills (Python, Bash, SQL). Passionate about analyzing/fixing complex problems and automating administration tasks.

$30.00 /hr
0 hours

Marifi M.

Network / IT / System


 Hands-on experience on network devices such as routers, switches, wireless access points, modems, voice over IP devices.  Able to plan, design, implement network designs based on customer needs.  Maintain network and ensure the availability most of the time.  Possesses a deep knowledge and experience in devices and networking protocols such as Cisco, Juniper, HP, Adtran, etc.  Expert knowledge of all aspects of TCP/IP  Proficient in routing protocols such as Static, RIPv2, EIGRP, OSPF, BGP.  Can implement and troubleshoot VLANs, VTP, L2 and L3 switching, STP, RSTP, 802.1q on switched networks.  Knowledgeable in WAN technologies (DSU/CSU, NAT/PAT, MPLS, Frame-Relays, ATM, Ethernet, HSSI).  Good understanding of network security, ACLs, Cisco IOS-based firewall and IPSec VPN technology.  Understanding of network analysis such as Wireshark, WAAS (WAN Accelerator) module, Riverbed, Visual.  Disconnection and reconnection of all hardware IT devices of large scale companies  Managed desktop, monitors, docks, cable management of HP, Dell, Toshiba  Installation of Windows Server 2012, Active Directory, Exchange Server 2013, Hyper-V  Installation of anti-virus Trend Micro, Malware bytes  Troubleshooting of Microsoft based computers  Working knowledge in Networking such as routing, switching, security and wireless access points  Knowledgeable in installing, configuring and troubleshooting Windows Server 2003, 2008, and 2012, AD, and Exchange  Working knowledge in troubleshooting Windows 7 problems and other MS based products  Hardworking and willing to work after office hours  Great communication skills  Can work under pressure and with minimal supervision Network Engineer L2 / Desktop Rollout Engineer (casual employment)  Install and configure routers and switches  Install and managed desktop/laptop such as Dell, HP, Toshiba, Apple  Responsible for cable management  Installation of network devices such as switches, wireless access points, etc  Racking and stacking of network devices  Implement RDP and all other needed software for the remote connections  Implements routing protocol (BGP, EIGRP, RIP, OSPF, static), path control, Qos, network management tools based on SLA and ensure the customer has connectivity to all of their sites via Verizon’s Private MPLS network  Installs customer premise equipment such as routers, switches, modems, access servers and network monitoring tools remotely  Install, configure, troubleshoot network device (such as routers, switches, wireless access points, VOIP devices, PABX, firewalls) to all head offices  Configure, troubleshoot network devices remotely for all branches  Inspect and conduct monthly inventory of all network devices (routers, switches, access points) to all head offices  Ensure the availability of network connections of all branches and head offices (with backup circuits)  Add all network devices to a Network Monitoring device (Solarwinds Orion, Nagios)  Responsible for giving ideas and implementing different projects for the network improvement of the company  Provide level 1 support for all the users’ problems with the hardware (printer, desktop, and other user devices)  Communicate with the user through phone, email and personally to isolate all technical issues they encounter such as application error, hardware problems, desktop support  Provides technical assistance to all users (desktop support, hardware problems)  Responsible for the billing statement of all the clients  Assist the AutoCAD Engineer in doing project designs CERTIFICATIONS and TRAININGS o Cisco Certified Network Associate (CCNA) o CCNP Routing and Switching o Linux Basics o Microsoft Basics

$27.78 /hr
0 hours

Yavor Yanakiev

Yavor Yanakiev

System Network Engineer

Bulgaria - Tests: 2 - Portfolio: 1

An IT Professional with CCIE(Lab Attempted),CCNA,CCDA, CCNP,JNCIA, JNCIS-Security and more than 10 years of experience in Network designing, planning, and implementation. Possess extensive experience with hands on products like Routers, Switches, Firewalls(UTM Devices), Servers, Link Balancers, PABXs(Telephony Systems). I was involved in a complete setup of Data Center in my career - design, implementation and support. SYSADMIN: Debian Linux / Ubuntu Linux / Red Hat ES Linux / CentOS Linux / FreeBSD Unix /pfSense Unix / Cisco Routers & Switches FTP SERVICES: proftpd, vsftpd, pure-ftpd, sftpd, tftpd FILE SHARING SERVICES: Samba, NFS PRINTING SERVICES: Cups CACHE SERVICES: Varnish, Memcache, MemcacheDB, eAccelerator WEB SERVICES: Apache v1/2, Nginx, PHP v4/5, Suhosin MAIL SERVICES: Postfix, dovecot, courier, RBL, postgrey, spamassassin, amavis, razor, pyzor, clamav, dcc DB SERVICES: mysql v4/5, phpmyadmin, mysqlcluster, postgresql v7/8, phppgadmin DNS SERVICES: bind9, tinyDNS, powerDNS PROXY SERVICES: Squid, SquidGuard, DansGuardian, URLFilter, haproxy, pond FIREWALL SERVICES: iptables, ipfwadm, netfilter VERSIONING SERVICES: SVN, CVS, GIT IDS SERVICES: Snort, PortSentry, Fail2ban, Bastille, Chkrootkit, Rkhunter, Tiger, Tripwire, Aide MONIT SERVICES: Nagios, Cacti, Zabbix, Mon, Monit, Zenoss, Ntop, Munin KERNEL SERVICES: kernel v2.4/2.6, grsecurity, openwall, other patches STATISTIC SERVICES: Awstats, MRTG, Vnstat, Htop, Bwm-ng NETWORK PROTOCOLS: TCP/IPv4 IPv6, IPX, ROUTING: Static Routing, Rip v1/2, (E)IGRP, OSPF(V3) SWITCHING: VLAN, VTP, STP, Inter VLAN Routing WAN: PPP, FR, Network Security, ACLs, IP Addressing, NAT NETWORK MANAGEMENT -Planning, designing, configuring and managing LAN/WAN ensuring maximum network uptime. - Carrying out installation & configuration of network, troubleshooting network problems. - Monitoring and analysing the network including Netflow products(Manage Engine Netflow), Solar Wind Orion, Wire Shark, Sniffer Pro, MRTG ,Cacti, Ethereal, Deep9s Edge Security Profiler, Nmap, Kiwi Syslog Server Possess sound knowledge of: - Cisco IOS up to and including version 12.4 – Advanced Enterprise Services. - Catalyst Switches IOS up to and including version 12.4 - Advanced IP Services. - Catalyst Switches including 1900, 2950, 2960, 3550, 3560, 3750, 4506 and 6509. - Cisco Routers – ISR800,1700, 3600, ISR 2801,ISR2821, 7609, ASR1002 - Routing protocols RIP, OSPF, IGRP, EIGRP, IS-IS, BGP, static & default routing. - IP Multicast technology – PIM implementation, IGMP -VLSM, PPP, IP Addressing, Redistribution, Network Address Translation, TCP/IP, DNS, DHCP, Network Aggregation - Switching technologies like VLAN, Inter-VLAN Routing, Ether Channel, VTP, MLS, HSRP, VRRP, UDLD, STP 802.1d and 802.1w - Remote Access Solution like ISDN, Frame- Relay, PPP and HDLC. - Network designing and trouble-shooting. Network Cabling and Infrastructure. - Elfiq link balancer basic experience - Basic experience with MPLS VPN configuration and implementation with PE-CE routing protocol configuration Network Security - Implementing & configuring VPN ( Open VPN, Site to Site VPN,PPTP, Mobile IPsec VPN) - Cisco Firewall - PIX 506e, ASA 5505, 5510,5520 – experience in maintenance and configuration - Cisco IPS/IDS Firewall - ASA 5505 with AIP SSC-5 - Linux IPS/IDS Firewall - Deep9s - basic experience in maintenance and configuration - Linux Firewall - Pfsense - FreeBSD based firewall in VMware environment - Handling security of Cisco IOS - Zone-based Firewall - Managing Access Control (ACL), Traffic Filtering - Implementing and monitoring information security policies. - Handling network and information security audits. VOICE SERVICES - Cisco ISR 2821 with CUE – configuration of Auto attendant system, Dialling plans, Voice Mail, Fax services, E1, Pots, configuration of IP telephony, Accounting and Billing, Conference Service; - Cisco Unified Communications 520,540 – Dialling plans, Fax services, E1, Pots, IP telephony, Voice Mail; - Intercom – Helios IP; Operating System Knowledge - System administrator experience with various operating systems - Windows 3.11/95/98/2000/2003/XP,Vista,Win7, DOS, FreeBSD(basic), Debian(basic), Windows server editions(Windows 2003,Windows 2008 R2,Windows SBS2011;) Special Services - SMS gateway Ozeki NG - Nextiva and Loronix video server and client software; Verint Networking appliances – encoders and decoders - Axis video software and encoders Virtualization - VMware ESXi 4.1, ESXi5 - Microsoft virtualization – Hyper V server - Blade Centre H, HS22

$15.11 /hr
0 hours

Daniel Yavorovich

Daniel Yavorovich

System Administrator

Ukraine - 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

100% Job Success
$33.33 /hr
46 hours