At a trading company in Amsterdam, the Netherlands I work as a part time Linux System Administrator. During those three days I am responsible for: - keeping the trading desk systems operational, running on both Ubuntu and Microsoft Windows - designing and implementing a new cloud solution based on KVM and drbd - Updating and migrating physical systems to virtual machines - Hardware maintenance
Technos is a telecom company in the Netherlands. Technos delivers high available hosted VoIP solutions. My responsibility at Technos was keeping the systems in the datacenter running. This things I've done: - Implementing a high available storage solution based on Ubuntu, drbd and nfs - Migrating virtual machines to a new version of Citrix Xenserver. - Migrating virtual machines from Xen open source to Citrix Xenserver - Upgrading / migrating virtual machines to a new version of CentOS - Implementing Nagios monitoring solution - Implementing a primary and slave Bind dns server solution
Mhasmo delivers Linux based solutions to their clients. At Mhasmo I am responsible for maintaining current Linux solutions based on Ubuntu LTS. - Creating new high available solutions based on, for example, DRBD. - Adjusting and fine-tuning current customer solutions. - Virtualisation based on KVM and/or Citrix Xenserver - MySQL clusters with DRBD - MySQL optimalisation - Loadbalancing based on HAproxy, Nginx and/or IPvS - High available NFS solutions - iSCSI storage based on Nexenta ZFS with SSD caching and Open-E with LSI Cachecade SSD solution - Application optimalisation
GlobalOrange – Experts in custom software, web application and mobile application development. Responsible for the Linux and Windows systems at GlobalOrange
The work that I do at Netformatie is; - Installing, updating and maintaining our Debian Linux servers - Creating new solutions based on OpenSource technology - Virtualisation based on opensource Xen, XenServer and VmWare technology - migrating virtual and physical server to XenServer with iSCSI backend running on HP Lefthand SAN solution - implementing Pandora FMS monitoring solution The tools we use are; - Debian Linux - Postfix/Exim - MySQL - Apache2 - Zarafa Collaboration Platform - Xen, XenServer and VmWare ESXi - HP Lefthand iSCSI SAN - HP Procurve network technology - HP Proliant DL and ML servers - Nagios and/or Pandora FMS monitoring solutions
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Together with my friend/compagnon we create solutions for any size of company. Togerther with the customer we try to build stable solutions based on (Debian) linux and Microsoft Windows. The products we deliver are: - Anti-spam - Managed firewall / VPN - Managed server - Online backup - Virtual Private Server (VPS) based on Citrix Xenserver and HP Lefthand Besides these products we also provide various ICT related services: - Consultancy - System implementation - System/network administration - System development
Together with my friend/compagnon we create solutions for any size of company. Togerther with the customer we try to build stable solutions based on (Debian) linux and Microsoft Windows. The products we deliver are: - Anti-spam - Managed firewall / VPN - Managed server - Online backup - Virtual Private Server (VPS) based on Citrix Xenserver and HP Lefthand Besides these products we also provide various ICT related services: - Consultancy - System implementation - System/network administration - System development
Together with my other teammembers I was responsible for administring a Unix environment of about 180 system. I belong, as ‘IP Specialist’ to a sysadmin department that’s, together with other teams, responsible for administrating the worldwide network of BT. Almost all systems are connection to the Internet. The systems have several functions: - Mail servers based on Sendmail, postfix or Exim - Webservers based on Apache - Firewalls based on Checkpoint 4.1 and NG with Stonebeat fullclustering or on Nokia hardware - DNS servers based on BIND - Network management servers HP OpenView - VoIP based on Cisco technology - RSA SecurID authentication servers - Etcetera Almost all servers run on Sun Solaris. A few systems are running Debian Linux. Because all systems are connected with the Internet Security is an hot issue and an important part of my day to day work. Upgrades, vulnerability management, audits, etcetera are equally important. I played an important role as ‘Security P
Together with my other teammembers I was responsible for administring a Unix environment of about 180 system. I belong, as ‘IP Specialist’ to a sysadmin department that’s, together with other teams, responsible for administrating the worldwide network of BT. Almost all systems are connection to the Internet. The systems have several functions: - Mail servers based on Sendmail, postfix or Exim - Webservers based on Apache - Firewalls based on Checkpoint 4.1 and NG with Stonebeat fullclustering or on Nokia hardware - DNS servers based on BIND - Network management servers HP OpenView - VoIP based on Cisco technology - RSA SecurID authentication servers - Etcetera Almost all servers run on Sun Solaris. A few systems are running Debian Linux. Because all systems are connected with the Internet Security is an hot issue and an important part of my day to day work. Upgrades, vulnerability management, audits, etcetera are equally important. I played an important role as ‘Security Poi
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