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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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Linux System Administration Upwork freelancers typically receive a client rating of 4.79.

Last updated: October 1, 2015
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Gaurav Kushwaha

Gaurav Kushwaha Agency Contractor

Expert System Administrator, Expert Programmer ( Java and scripting )

India - Tests: 10

Over the last 5 yrs I am working in areas like J2EE, Linux and Windows system administration which includes WebServers ( Apache, IIS ), Mail Servers ( Postfix , Exchange ),LDAP, AD, DNS, MySQL, CMS ( Joomla, Drupal, WP, Magento), Asterisk, Nagios, SMS Gateway etc. I have done virtualization using HyperV, VmWare and VirtualBox. Also, I have also setup security for systems using vlans, IpTables, port blocking etc. In addition to above mentioned server systems, I have done migrations of websites from Linux to Windows and vice versa,and migrations of mail servers from postfix to exchange and exchange to office365 and vice versa. I have setup also backups ( both enterprise grade and with small scripts ). Till now I have worked on Labtech and Nagios to monitor and also to provide proactive maintenance to systems. I know programming as well, so I try not to do repetitive work and hence create scripts, which results in less errors and better productivity. I have knowledge of Java, Java script, Shell Scripting, php and SQL.

Groups: Microsoft Certified Professionals

Associated with: AKBSoftTech

$8.33 /hr
460 hours

Usman Abrar

System Administrator

Pakistan - Tests: 1

Configure Web host automation software Helm and Cpanel on linux and Windows platform for ease of hosting environment using IceWarp Merak , IIS, MsSQL, MySQL, FTP, AwStats, ,MDaemon), DNS Server. Linux Expert. VM-Ware ESX Expert. Mail Server Postfix, exim qmail LAN / WAN technologies and their implementation in complex connectivity scenarios

$5.11 /hr
0 hours

Mykhailo K.

Mykhailo K.

Amazon AWS/EC2/S3/Migration/Wordpress Expert

Ukraine - Tests: 12 - Portfolio: 2

Amazon Services Expert - EC2, RDS, Load Balancing, S3, Cloudflare. Server performance optimization - Apache, Nginx, Mysql, caching. Wordpress - performance optimization, security, migrations, malware clean up. Dedicated Servers and VPS setup, configuration, security - both Windows and Linux. Work with CentOS, Ubuntu, Debian, Amazon Linux, FreeBSD, Windows 2003/2008/2012 Servers. Server administration Panels, setup and configure - Plesk, DirectAdmin, Cpanel, Webmin, WHMCS, VestaCP. MySQL, MSSQL, Apache, IIS - setup, configuration, optimize for performance. The last 10 years I developed the whole IT infrastructure in large publishing house company, implemented domain, mail, documents workflow, and web services for 500+ company employees.

95% Job Success
$40.00 /hr
1,008 hours

Andrei Volkov

Andrei Volkov Agency Contractor

Linux specialist (Sec/Opt/Dev, C/Perl/Python/PHP/BASH)

Belarus - Tests: 5 - Portfolio: 13

Important: ------------------- Enhanced shield of your Web application with mod_security! Should be always. It is task #1 after installation ANY web application! ------------------- About Me and more: ------------------- I have over 16 years of work experience with Linux systems. This is the list of software and technologies with which I deal. This list is not full and expands day by day. I always can find right decisions if I found some problems. And I am always interested in looking for mostly economical and productive solutions. Of course, Cpanel, WHM, Webmin, Plesk .... I know how are working these web-wrappers and I support their. I can will tune and to make the checking of these wrappers. But that more important !! I can work without this))) Directly use configuration files of services and etc etc. Usually, it is better way on dedicated servers. ) TCP, IPv4 , IPv6, IPX ... - WiFi, WEP, WPA, WPA2 ... - SElinux, Apparmor, Smack, Tomoyo ... - LAMP ( Apache, Nginx, PHP, Perl, Mysql, Mongo), REDMINE ... - Cpanel, Zpanel, ISP ... - MySQL clustering and replication DNS servers ... - SENDMAIL, EXIM, POSTFIX (POSTFIXADMIN,MYSQL,DOVECOT,POLICYD) ... - HPC system: Torque, Maui, Moab for HPC clusters, Infiniband, FC interconnect, iSCSI, SCST, DRBD, OFED, OPENMPI ... - OpenLDAP ... - VPN with OpenVPN, PPTP, StrongVPN ... - Nagios, Zabbix, Ganglia, OSSEC ... - SVN, CVS, GIT ... - KVM, Xen, OpenStack, Proxmox ... - NBD, RAID, LVM ... etc etc During these years I have been in a large number of tasks related to administration of network devices, as well as with simple and complex server systems. I manage servers for the HPC tasks and for network infrastructure of Internet and Intranet - DNS,DHCP,*FTP,HTTP(S),MAIL etc etc. The main goals - the monitoring of the performance and the security. I also implement tasks of data backup and troubleshooting, support for the users. I have comprehensive work skills with systems based on Debian, Redhat, CentOS, SLES, OpenSuse. I've got more than 8 years of experience in developing the different software with use of C, Perl, Python, Bash, HTML on system and user levels. For example, very important skill in developing and the modification of RPM packages (rpmbuild, rebuild, kernels), custom kernels and etc etc. ------------------- Often: ------------------- How the standart service for VPS's and VDS's projects and dedicated servers: IDS, IPS, the control of contents of log's files, the control of load of the cpu, the memory, the hard disks; the backups of the databases and the files; install or update software, consultations. Emergency call via sms to cell phone. ------------------- STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. VERY OFFTEN: IF YOURS WP WAS HACKED 1. disable plugins 2. execute # diff -r dir1 dir2 3. repeat for plugins if you have last version of WP code: ~ 80% cases - problems: plugin low quality (look on author: from where and who is) ~ 15% cases - problems: theme low quality (look on author: from where and who is) ~ 5% 0day of WP also you need disable all shell function in php and enable suphp/suexec modes. STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. I am getting a lot questions about reliability and quality distributives/clones Ubuntu. Results on practice - Ubuntu clones - worst for server. It is truth. If you $buntu guy, I can't help you right now. I only can recommend Debian way for server. =============== 3. Nginx of course is good program. For small/middle vps. But in serious projects - apache. Nginx will be suitable for frontend. It is only practice. Always for all web application should be mod_security module. Firewall of level of web application on 7 level of OSI. Each web application/site should be under own user in environment of vps or on dedicated servers. =============== 4. By topic Wordpress. For optimisation services of OS , namely system IO(type of disks or partitions) and DB(type of engines of tables), need to use empty installation (default variants). Most problems of work WP contains in itself - customized plugins or themes. For analyze pages need begin with such services as =============== Sunday - day of rest. Or in emergency case - payment with double rate. best regards, Andrei / PS: With love from USSR. ;-)

Associated with: UPWORK.LINK

100% Job Success
$16.00 /hr
1,023 hours

Randy Snow

Randy Snow

DEPENDABLE Project Manager - LAMP Admin - Network Admin

United States - Tests: 8

With well over 17 years in the Information Technology field, I have developed strong skills as a problem solver. I have worked extensively as a manager and project leader. I have been involved with upper level management with key roles in the direction and implementation of corporate IT structure. I am skilled at hardware and software troubleshooting, implementation, and function. I am specifically looking for jobs where I set my own work schedule. I prefer to discuss and agree on a fixed budget ahead of each project. I work best when presented with clear concise goals and a solid due date.

$22.22 /hr
29 hours

Adil Mehmood

Adil Mehmood Agency Contractor

System Administrator

Pakistan - Tests: 7 - Portfolio: 4

Hello, my name is Adil Mehmood. I hold an advanced degree in Electrical and Network Engineering with five years of experience in the field of professional system administration (small & medium office networks, 500+ hosts office network), network planning, server, website and database administration. As a professional, my #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. Please take a look at my work history for comments from other clients, as well as oDesk test results. Thank you in advance for your time and consideration. I look forward to working with you soon. Listed below are my experience and skills: * OS: Windows Sever 2003, 2003 R2, 2008, 2008 R2, 2012; Windows XP, Vista, 7, 8; Debian 5-7; CentOS 5, 6, 7; Ubuntu (desktop 10.04-14.04, server 12.04-14.04); Arch, Slackware, Redhat; Mac Os X * Coding: C/++, bash, powershell, HTML/CSS/PHP * Stacks: LAMP, WAMP, Denver * Web servers: Apache, Nginx * Databases: MySQL, PostgreSQL, Microsoft SQL (MSSQL) Server, Oracle database 12c+ * Backup services: Bacula, Backup PC, Amanda, Windows Backup (wbadmin), self-written scripts * VCS: Git, SVN * Domain administration: Active Directoy, Samba * Mailservers: Postfix, Dovecot * Mail tech: spamassassin, SPF, DKIM, un-blacklisting * Netwok secuity: fail2ban, snort, Sqiud, ClamAV, RKHunter, Ossec hids, CSF Firewall,Maldet.

Associated with: IT Junctions

100% Job Success
$11.00 /hr
0 hours

Gilberto Sirit

Gilberto Sirit

Audio Engineer

Venezuela - Tests: 6 - Portfolio: 1

I'm a 10 years-experienced Network/IT technician, holding a Cisco CCNA Certification. I've been deploying Cisco Router and Switch configurations from scratch, hardening and configuring wide-used solutions like centralized account systems, remote secure communications and creating and implementing security policies for various companies. As a freelance job, I'm a Avid Pro Tools Certified Operator, which allows me to work a lot on audio and video projects doing musical recordings for TV and Radio commercials, Sound FX audio post-production, editing and mixing using Pro Tools system. I have superb bi-lingual communication skills both oral and writing, English and Spanish. I'm looking to offer my high-quality services in any task required by my employer. My goal is to put 110% effort on the job at hand, that way I feed my experience out of it and makes my employer satisfied with my work.

$13.33 /hr
0 hours

Alysa W.

QA Leader-Senior Software QA-Automation/Manual tester-mobile tester

China - Tests: 5 - Portfolio: 9

8 years of rich experience in Manual and Automated testing of software, firmware, web-based, desktop application, router, and mobile with focus on function, system performance/stress and system compatibility. My core competency lies in team management, test process improvement, create comprehensive Test Pan, write positive/negative Test Cases , perform Manual/Automated testing, find bug as early as possiable and make sure they get fixed, write detail Test Report and give some advice. Successfully worked on different products ,such as DCM, UHC, Accero, Config,Tranzax and so on. Succssfully developed test scripts to automate website and desktop appliction. Rich experience in Smoke Testing, Functional Testing, Regression Testing, Sanity Testing, Usability Testing, Cross Browser Compatibility Testing, Exploratory Testing, Backend Testing, Security testing, Stress testing, Performance testing, Alpha testing and Beta testing. Rich experience in automated testing by TestComplete, QTP. Some experience in performance testing for web service by Jmeter. Rich experience in bug-tracking systems, such as JIRA, Mantis, Bugzilla and Redmine. Some experience in the following areas: Project Management, Team Building, Mobile/IPad testing, Network knowledge, TCP/IP, SQL, Shell, Python, C, VB, Firebug, XPath, Selenium. Excellent communication and presentation skills while dealing with business comunity, team members and developers. Detail-oriented and trouble shooter. I'm freelancer and I can commit to a long term. I am seeking opportunites to build quality assurance for you or your business.

$15.00 /hr
5,221 hours