I have 15 years administrating Networks and Linux platforms. I can design, implement and troubleshoot large networks. I can install, migrate, optimize and troubleshoot Linux systems. I have strong networking and Linux troubleshooting skills. I can do a cost-effective and fast work for you. My expertize is to install configure and optimize Linux servers and routers, I have experience in fault tolerant and fail over linux systems and it´s integration with Windows Systems like Active Directory Authentication and Authorization of Linux email systems, Apache/PHP Software, Squid Proxys, Jira Confluence, and any other LDAP capable software. My specific Linux skills are: - Networking: * Vpn: IPsec (freeswan, Openswan), pptp * tcp/ip Unix & Windows * Firewall (iptables), Gateways, nat, pat, Routing (Static, Dinamic: rip, ospf, bgp) * Dhcp, cbq (iproute2+tc), vlans (802.1Q) * MRTG - Web and App Servers * Http: Apache, iis, php * Tomcat, JBoss installation * LAMP & WAMP - Databases * MySql, Postgres * Phpmyadmin, PhpPgAdmin -Email and chat * Email: pop, pops, imap, imps, smtp, ssmtp (Sendmail, Postfix, Antivirus, Antispam), Webmail platforms, mailman (mail discussion and e-newsletter lists) * jabber: ejjaberd, openfire. - Fault tolerant and fail-over: * Raid(0 stripping ,1 Mirroring,2,3,4,5, 6, 10). Hardware & Software. * Heartbeat -Other daemons: * ftp, ssh, telnet, nfs, dns, samba, cron, Squid (proxy) - Security: * IPtables, Firewalls, DoS, Exploits, pgp, gpg, vpn, Port Scanners, Root Kits, Spoofing, sniffers, reverse shell. * Fail2Ban (Dynamic Firewall) -Backup: * Bash scripting, cron jobs, Samba integration with Active Directory windows systems
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Expert in Linux, proficient in BSD, Windows, OS X Red Hat Certified Engineer (RHCE) System and software configuration, installation, optimization System and network administration and security Performance, metrics and monitoring Programming in perl, php, c, shell Packaging rpm and deb, Linux kernel customization Linux Live CD & Live USB creation Linux distributions customization And more...
For expert and experience you should hire me as a system administrator or network administrator for your valuable projects. I have a great work experience of lunux Debian, Redhat, Fedora, Amazon cloud AWS EC2 server, amazon cloud RDBS, Rackspace cloud server, Digital ocean cloud server, VPN, CISCO routers and switches, virtual box, VMware, Mikrotik router, Linux Quagga router, HTML, PHP, shell scripting, Windows 2003, 2008 with exchange 2003 and exchange 2007. I have also many years practical experience of linux DNS, Proxy, Mail, Virtual web, FTP, VPN, SAMBA, NFS, NTP, Virtual machine, Mysql and many web based application. I am always ready to start with your journey of projects.
I have 24-years experience in network projects including design, implementation, system administration and in software development. For the first 5 years of my career I worked on software development: coding and especially testing. For the last 18 years I'm working on implementation and maintenance of University of Nis WAN. Last 13 years I'm deeply involved in AMRES (Academic Network of Serbia) project. http://www.linkedin.com/in/ratkobucic Don't fix it if it ain't broken, don't break it if you can't fix it! SKILLS SUMMARY Operating Systems: *nix (SGI IRIX, Linux, SCO, FreeBSD), MS Windows 3.1/9x/Me/2K/NT/XP/2003/Vista/W7/2008 LAN & WAN: Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI and Wireless LANs. T1/T3, SDH/SONET, Frame Relay, WDM, ISDN, ADSL, SHDSL, Cable Modems, Cellular, X.25. Network Protocols: TCP/IP, IPv6, UDP, OSI, CDP, IP Multicast, IPSec, VoIP, Routing, VLANs, Bridging, Trunking, VPN, SNA, DLS Network Services & servers: SMTP/POP3/IMAP, FTP/SFTP, Telnet/SSH, HTTP, DNS, DHCP, NNTP, NTP, LDAP, SNMP, NETBIOS Network Equipment: various types of modems, switches and routers (mostly Cisco). Cisco IOS software. Cisco routers & switches: Catalyst 65xx series, Catalyst 35xx series, Catalyst 29xx series, 16xx series, 17xx series, 25xx series, GBIC, Cisco Access Servers AS36xx. Programming Languages: C, Pascal, MS Visual Basic, Unix Shell scripting, JAVA Script, PHP, HTML, Flash.
I've been in the IT Industry for 13+ years now. I have been doing remote IT assistance to different companies here in the Philippines and the U.S. * Vicidial Installations and Maintenance * Linux / Unix Installation, Administration and Maintenance * Asterisk Installation, Admin and Maintenance * Backend Web Development * Database Administration (MSSQL, MySQL, Oracle, Sybase)
I have 10+ year experience at working with most of Linux systems SLES, RedHat, CentOS, Fedora, Debian, Ubuntu, Gentoo. I also love FreeBSD and Solaris. ARM based devices (cubieboard, raspberry, ...) are among my interests. My experience is confirmed by multiple Red Hat certificates. One of my hobbies and my profession are the same. Since I have graduated a higher school, I have been constantly increasing my knowledge at IT. I deployed MySQL, PostgreSQL databases, Apache/Nginx servers, Email servers, proxies, firewalls, KVM based virtualization, deployment of OpenStack Clouds, and other software for different purposes. In according to your requirements I can assist in a design, suggest a better solution and do its implementation. At my full-time work I support the closed-source enterprise systems such as AIX, Solaris, UnixWare, HP-UX, troubleshooting and contacting with vendors are a part of my regular tasks.
I am the member of the MIS team and covering all release managements and server operations. I currently handle ESXi and ESX server farm in Australia and USA. • Have experience installing, maintaining and troubleshooting VMWare servers. ESXi and ESX Vsphere servers. Installing, maintaining iSCSI software. (OpeanFiler / OPEN-E / HP LeftHand) • Have experience installing, maintaining and troubleshooting MS Windows Server 2008 and 2003. Installing, maintaining and troubleshooting domain controller. Have experience in Active Directory maintaining and troubleshooting. Customizing Group Policies. Scheduling Backups. Domain Replications. DFS Replications. Installing, maintaining and troubleshooting IIS 7 and 6. DHCP Server installation, maintaining. • Have experience installing, maintaining and troubleshooting MS Office SharePoint Server 2007 and 2010. • Have experience installing, maintaining and troubleshooting MS Exchange server 2010. • Have experience installing, maintaining and troubleshooting following software firewalls. MS ISA Server 2006. Untangle (Open Source) SmoothWall (Open Source) • Have experience installing, maintaining and troubleshooting PLESK control panel and Cpanel. • Have experience installing, maintaining and troubleshooting UBUNTU/ CentOS / RedHat / SUSE Linux / Sun Solaris servers. Installing Apache Server, Virtual hosting, Apache SSH configurations and Apache failover clustering. Installing MySQL Server, MySQL data base replication and failover cluster. Installing FileZilla FTP Server Scheduling cron jobs. ISC DHCP failover clustering. • Have experience installing Windows 7, Windows XP, UBUNTU, KUBUTU, and Fedora. • Have experience working with Amazon cloud computing and Soft Layer cloud computing. • Have experience in installing, maintaining and troubleshooting wireless network. • Can maintain and troubleshoot LAN environment. • Have experience installing MS SQL 2008 and 2005 servers. I’m maintaining daily backups in MS SQL servers and database management. • Have Experience installing and maintaining CISCO ASA 5505 Firewall, CISCO Routers and CISCO Switches. Routing Protocol RIP, IGRP, RIP v2, EIGRP, OSPF Creating Vlan Nating Creating VPN
Linux System Administrator System engineer Network administrator Computer security Database administration IT Consulting Operating Systems: Linux (Debian/Ubuntu, CentOS/RHEL), Windows, Windows Server, Cisco IOS, Cisco ASA, Fortigate Web servers: Apache, Nginx Databases: MySQL, MsSQL, Oracle, MS Access Mail servers: Postfix, Exim, Sendmail, Dovecot, ClamAV, SpamAssassin Networking: TCP/IP, NAT, VPN, DHCP, Firewall, Routing, iptables, FTP, SSH, Active Directory, Domain Controller Virtualization: xen, kvm, virtualbox Scripting: bash/sh, vbs Backup: rsync Monitoring: Munin General Computer Skills: Microsoft Office (Word, Excel, PowerPoint)
Linux, Unix, Windows system administrator, Virtualization, Networking. I have experience with: Amazon Web Services(EC2, S3, RDS), DigitalOcean, VoliaCloud OS: Windows, Linux, FreeBSD Virtualization: VmWare ESX, VmWare Workstation, VirtualBox, Proxmox, Hyper-V. Server panel: WHM/Cpanel, ISPmanager, Zpanel, Webmin Web-server: Apache, Nginx DNS-server: Bind FTP-server: vsFtpd, Filezilla Mail-server: Postfix, hMail Web-client from mail: SquirrelMail, Roundcube Network equipment: switch, router, ADSL-modem, Wireless access point, etc. (Cisco, D-link, Mikrotik) VPN: OpenVPN, PPTP Proxy-Server: Squid, UserGate CMS: Wordpress, Joomla Server software: PHP, SSH, Cron And many more that are not included in this list