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Last updated: October 1, 2015
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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

Juan Manuel García Del Moral

Juan Manuel García Del Moral

Sr Unix/Linux Management and Infrastructure Expert

Argentina - Tests: 2 - Portfolio: 6

I have 12 years of experience in Unix/Linux Administration and Development. During this time, I've developed professional solutions using the following technologies: Linux, Unix, Perl/Bash Scripting, Apache, MySQL, PHP, Tungsten Replicator, XEN, VMWARE and more. My main goal is to become your preferred IT partner when you need to get any project done. I want to build a strong and long term working relationship with increasing benefits to both parties. I strive on customer satisfaction regarding: - Time and Cost Effectiveness - Quality Assurance - Outstanding product performance - Fluent and Friendly Communication - Availability.

$25.56 /hr
329 hours

William Grzybowski

William Grzybowski

(Web)Development and Unix-like Consultant

Brazil - Tests: 7 - Portfolio: 2

Before I even go to university i started working with Web-development. My first experience was about 6 years ago with pure HTML using frames in Dreamweaver 3. Since then I have worked hard to improve my skills in every way possible, not just as a web-developer but as a general programmer, and now I work essentially with Open Source software like Python(+Django), PHP, Linux/FreeBSD, PostgreSQL, etc.My degree in computer science helped me to understand the basics of a computer from the bits in the processor instructions to multimedia, and thus can be used everywhere to improve the final result of a project.

$33.33 /hr
3,500 hours

Walker Leite

Walker Leite

Linux System Administrator

Brazil - Tests: 2

Student of Computer Science, working with GNU/Linux since 2007. Expert in Debian/CentOS-Redhat web/database server installation and administration. Knowledge in PHP, HTML, CSS, javascript, Bash scripts, Perl, Mysql. Today, manages Cloud Amazon AWS EC2, RDS, Loadbalancer and Autoscaling services for Praiseweb (hosting provider), and their clients.

$15.00 /hr
13 hours

Lou Golar

Lou Golar

IT Support

United States - Tests: 2

I am an IT support professional with a wide range of skills, including Windows, Linux and Macintosh desktop and server systems. I am also experienced with Oracle, MySQL and PostgreSQL database management systems. My goal is to find work providing customer IT support for desktop, as well as server systems. I have over 8 years experience as a Tech Support Rep/Analyst for a variety of software on various operating systems. I also have extensive call center experience, as well as field service.

$13.33 /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

Giorgos Anastasiou

Giorgos Anastasiou

George Anastasiou, System Administrator And Web developer

Greece - Tests: 8

Over the last 4 years, - I have developed some sites using HTML,PHP, JavaScript, Jquery library and MySQL for startup companies and small businesses. - I am using mainly GNU/Linux operating system, so i am experienced in solve problems for servers or desktops. My beloved distribution is Gentoo, because it gives me the opportunity to customize everything, from kernel to software. - I have developed two servers for two new accounting companies, in Linux operating system, both of them have uptime more than a year. - I have some experience in Bash and Lua scripting language. - I know basic stuff about networking and routing protocols. - I have experience in Windows OS, mainly what ever has to do with operating system optimization and hardware related staff.

$8.89 /hr
0 hours

Oleksii Mykhailov

Oleksii Mykhailov

Python/Django developer


Programming skills: Python, bash Linux (preferred)/Solaris/HP-UX administration: web-servers/hosting servers, database servers, clustering, performance tuning, monitoring, deploying, security configuration and audit. Storage systems: HP XP12000/24000,building HA NFS servers Virtualization: Xen, openvz

$33.33 /hr
2,252 hours