http://dennis.roos.to/ 2012-03-19T13:04:00+01:00 http://dennis.roos.to/ http://dennis.roos.to/lib/images/favicon.ico text/html 2009-04-06T17:03:07+01:00 http://dennis.roos.to/doku.php/documents:bb_uclibc_preboot?rev=1239030187 The information below is provided to build a Gentoo, uClibc and BusyBox based development environment. This document is based on an excelent howto by H.H. Holcomb that can be found here. NOTE: If not stated otherwise, it is required to be root whil... text/html 2008-07-24T15:43:14+01:00 http://dennis.roos.to/doku.php/documents:deploy_using_pxe?rev=1216906994 This is a step-by-step guide on implementing PXE based OS deployment. PXE deployment host setup guide OS install All that’s needed is a basic OS. No fancy packages like X-windows and the like, just the basics will do. Additional packages... text/html 2006-06-30T13:52:35+01:00 http://dennis.roos.to/doku.php/documents:extend_syscp_with_mailmigration?rev=1151668355 [ Discussion in the Forum ] Introduction After working with various control panels and mailservers at various places, I never seized to be amazed at the amount of problems that arise at each migration. All these migrations are performed by techn... text/html 2008-08-25T10:45:51+01:00 http://dennis.roos.to/doku.php/documents:linux_sudo?rev=1219653951 In order to keep systems maintainable and security at a respectable level, sudo is used to perform actions as super-user or application user. Groups Groups The groups used to specify various security levels are: Groupname sudo Alias GroupID ... text/html 2006-10-16T12:45:15+01:00 http://dennis.roos.to/doku.php/documents:linux_sysctl?rev=1160995515 Linux SysCTL optimization /etc/sysctl.conf Generic # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and # sysctl.conf(5) for more details. # Controls the System Request debugging functionality of the kernel kernel.sysrq = 0 # Con... text/html 2006-11-21T12:51:42+01:00 http://dennis.roos.to/doku.php/documents:newsinfrastructure?rev=1164109902 “NetNews is in 1979 ontwikkeld door de universiteit van Duke University te Amerika. De oorspronkelijke naam, UseNet, is een acroniem voor Unix uSEr NETwork. Usenet op zich maakt geen deel uit van het internet. Het is een toepassing die het int... text/html 2006-09-20T12:25:31+01:00 http://dennis.roos.to/doku.php/documents:oneliners?rev=1158747931 Output: Messages in queue of sendmailhost @ Wed Sep 20 11:52:29 CEST 2006: 143.539 Deliver queued mail for specific PostOffice host: for file in `find /var/spool/mqueue/ -type f 2>/dev/null`; do if [ "`grep po[01][0789] $file`" != "" ... text/html 2006-12-21T14:32:20+01:00 http://dennis.roos.to/doku.php/documents:ossel?rev=1166707940 In dit document wordt bekeken of - en zo ja hoe - het Open Source gedachtengoed van toegevoegde waarde kan zijn voor een organisatie. Gezien de ontwikkelingen van de laatste tijd in onder andere de politiek (gemeenten en andere overheidsinstellinge... text/html 2007-02-14T10:29:47+01:00 http://dennis.roos.to/doku.php/documents:pci_bus_speed?rev=1171445387 To calculate the theoretic throughput of the PCI bus, use the following formula: ( bit * Hz ) / (1024 * 1024 * 8 ) = Throughput in MByte/s On average the throughput will be 10 to 20 MByte/s more than this theoretical value. For example, a 64bit P... text/html 2012-03-07T17:36:54+01:00 http://dennis.roos.to/doku.php/documents:plesk_tips?rev=1331138214 First of all make sure that all domains have ‘Mail to nonexistent user’ set to ‘Reject’ but not to bounce. This can be changed for all domains using “Group Operations” on the “Domains” page in Plesk CP. ‘Reject mail to nonexistent user’ feature is a... text/html 2005-11-11T21:52:50+01:00 http://dennis.roos.to/doku.php/documents:powerdns_io_bind?rev=1131742370 [ Discussion in the Forum ] Introduction Because I am using vservers using bind was not really an option in my setup (there are ways to use bind within vservers, however I wanted a clean setup that is easily maintained). I therefor decided to run... text/html 2005-11-11T21:53:27+01:00 http://dennis.roos.to/doku.php/documents:pureftpd_io_proftpd?rev=1131742407 [ Discussion in the Forum ] Introduction Because I am running my servers over nfs storage, there were problems with proftpd (Sessions were timing out, stalled during transfers, etc). So, I decided to run an alternative ftp daemon. My first atte... text/html 2008-07-17T10:48:40+01:00 http://dennis.roos.to/doku.php/documents:solaris?rev=1216284520 * Solaris package management Storage * Solaris 10 - iSCSI ... text/html 2008-06-26T13:03:38+01:00 http://dennis.roos.to/doku.php/documents:solaris_pkg_install?rev=1214478218 In order to install solaris package without having to answer all sorts of questions from the package manager, you need to create an answer file. For the screen package, I used the following data: Package file: screen-4.0.2-sol8-sparc-local Answer ... text/html 2012-03-07T11:02:23+01:00 http://dennis.roos.to/doku.php/documents:start?rev=1331114543 * Building better managed infrastructures * News Infrastructure Design A fully redundant low maintainance nntp news infrastructure. * Open Source Software Expert Lab Will Open Source/Open Standards safe the world; if so... How?! * Secure DNS ... text/html 2008-06-23T13:40:03+01:00 http://dennis.roos.to/doku.php/documents:static_ocs_solaris_client?rev=1214221203 The standard OCS client is available from: http://bfleisch.free.fr/ocs-solaris-client/ (at the moment of writing, the latest version is .11). Download it and unzip / untar it. gunzip -cd $ARCHIVE | tar -xf - Initial Compile In order to create ... text/html 2009-11-09T16:21:12+01:00 http://dennis.roos.to/doku.php/documents:ubuntu_m3_touchscreen?rev=1257780072 Following this howto: http://tnoergaard.wordpress.com/2009/05/09/ubuntu-touch-screen-setup-and-calibration/ I ended up without a working touchscreen, so I decided to update the steps to ubuntu 9.10 Installing required packages: sudo apt-get insta... text/html 2006-06-26T12:46:22+01:00 http://dennis.roos.to/doku.php/documents:ugentoo_guide?rev=1151318782 In order to create a lean and mean hosting environment, I decided to migrate to uClibc based vservers, using SysCP as Control Panel. First off all, prepare the environment as described in the BusyBox and uClibc preboot environment document. The Sys...