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Last updated: October 1, 2015

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Pavel Mlejnek

Pavel Mlejnek

System support analyst 4 years experience.

Czech Republic - Tests: 2

Hello, I can offer you high quality Customer/Technical service, server and network administration. At the age of 18 I started to work as a desk clerk in Hotel where acquired my communication skills as I was dealing with customers every day whether on the phone, Skype or in person. Two years later I began my IT career as a system administrator in small company, administrating local network consisting few machines with Windows XP, Windows 7 , Debian operating systems, and Windows Server 2003. Two years later I moved to Athens, Greece in order to work for Microsoft as a 2nd line Technical/Customer support, resolving issues with applications, performing software upgrades, analyzing crash dumps, migrating user accounts etc... Most of the time I spent on phone/chat with customer while remotely managing customers machine. Apart from that I was official MS Social Media and forum moderator and quality controller of the rest of Czech Technical support department staff. Currently I am working as Windows, Linux and HPUX Server Administrator in enviroment hosting more than 5000 servers. My main tasks are maintenance of servers (including configuration of new servers), run OATs, perform backups and restores and resolving services and application issues. Apart from that I am also responsible for patching and server security.

$15.00 /hr
0 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

Roman Voitenko

Roman Voitenko

linux/freebsd, high load solutions, scripting, amazon ec2

Sweden - Tests: 4 - Portfolio: 1

My experience as system administrator is mostly focus on Linux. Skills include deploying, migrating and managing Linux systems, development of high-load redundant clusters, automating operational tasks using puppet, perl, shell scripting with attention to documentation, standardization, procedures and policies. I’m a perfectionist in work and in my life.

$66.67 /hr
725 hours

Ali U.

Ali U. Agency Contractor

Network Syt Administrator At Active Apparel Pvt(ltd) IT Professional

Pakistan - Tests: 2

Aspiration for a challenging job with favorable working environment, better future prospect allowing me to enhance my professional and interpersonal skills fully along with negotiable remuneration.

Associated with: HawkT Comunications

$4.44 /hr
0 hours

D Kumar

D Kumar

Linux server administrator

India - Tests: 2 - Portfolio: 2

To achieve personal & professional growth in the field of Information Technology and especially in the field of Open source systems & Networking. I would not mind to work in challenging situations, which would reveal my inner talent and help me emerge as a competent & efficient engineer. I would like to work on new technologies and continue learning more & more.

$11.11 /hr
0 hours

Rakotondriatsara Rindratsoa

Rakotondriatsara Rindratsoa

Unix and Linux scripting,system and security administration

Madagascar - Tests: 6 - Portfolio: 3

I have ten years of experience in Linux and Solaris system administration, during which I realized administration and monitoring scripts performed with shell, awk, perl and python. My goal is customer satisfaction and my personal philosophy is based on continual improvement process. . SKILLS: Python, shell, awk, Perl, solaris and linux system and security administration, mysql, oracle, virtual infrastructure, ISO 27001

$10.00 /hr
0 hours

Mariel therese S.

Mariel therese S. Agency Contractor

Technical Consultant

Philippines - Tests: 11 - Portfolio: 2

Started out as a web developer, now a (certified) database and system administrator. I have over 3 years of experience with working, as a consultant, with companies from different industries (manufacturing, financial, telecommunications). Technologies I am familiar with include installation, configuration, and administration of Oracle Databases (with RAC, DataGuard, partitioning and other database-related products and features) and various Linux systems. Recently, I have started working with Oracle engineered systems as well. My development experience allows me to see creative ways of seeking solutions to various issues I encountered by me or my clients. This is something I have proven to be quite valuable in this trade. I am looking for opportunities that will expand my knowledge with the technologies I have been working with and in turn, improve current systems for you or your company. That being said, I amenable to looking into other systems/technologies I may not be well-versed with in order to complete client requirements properly.

Associated with: Mondex Professionals Agency, Streusel Inc.

100% Job Success
$25.00 /hr
535 hours

Dragos Crisan

Dragos Crisan

System Administrator

Romania - Tests: 6 - Portfolio: 1

I am a results-oriented person. I have fourteen years experience in managing computer networks, installation, configuration and administration of servers. I worked with several operating systems, both Linux and Microsoft. I have experience in configuring Active Directory, IIS and Routing and Remote Access. I also have experience in the installation and configuration of Linux mail servers, both sendmail and qmail. I have 2 years experience with postgresql sever

$10.00 /hr
0 hours

Maxim Dukov

Maxim Dukov

Senior Linux System Administrator, Security Expert.

Russia - Tests: 7

Linux administrator. OS installation and configuring, backup organization and rescue, data transfer from one server to another, troubleshooting, shell scripting are in my competencies. * Debian, Ubuntu, Fedora, CentOS, RHEL, SUSE. Also I have experience with using open source command line tools from shell, perl and php scripts: * MySQL - creating SQL scripts, backup/restore/DB migration scripts, DB optimization and perfomance tuning: * Network services like LAMP stack, OpenVPN, OpenSSL, OpenSSH. * Information security related services - like log collection via OSSEC/NXLOG with ELK stack, SNORT/Suricata installation. * Creating and support electronic mail archive (I strongly recommend free MailPiler solution) for FRCP, SOX and HIPPA compliant. You can ask me about non-standard tasks or problems concerning Linux or other Unix systems.

$9.90 /hr
0 hours