Archive for 'Open Source' Category

Install problems on older hardware

By jbayer - Last updated: Friday, February 11, 2011

A coworker was trying to install Ubuntu 10.10 Maverick Meerkat onto an older laptop.  The installer would simply hang at a black screen as soon as the install was started. This brought to mind the problems people have installing onto different hardware;  I’m going to keep this updated with various ideas and suggestions. Maverick Meerkat […]


Using “configure” to build a 32 bit executable on a 64 bit System

By jbayer - Last updated: Thursday, February 10, 2011

If you are on a 64 bit Linux system, and need to build a 32 bit executable (for example if you need to install it on  another, 32 bit, system), you can build it by passing the following argument to the  configure script: ./configure –build=i686-pc-linux-gnu “CFLAGS=-m32” “CXXFLAGS=-m32” “LDFLAGS=-m32”


Updated lftp for CentOS 5.5

By jbayer - Last updated: Thursday, February 10, 2011

(Following taken from: Every sysadmin should have a decent command line client for transferring files (beyond scp of course). The lftp program written by Alexander Lukyanov can handle seven file access methods: FTP, FTPS, HTTP, HTTPS, HFTP, FISH, and SFTP. The openssl library is required during compile-time in order for FTPS and HTTPS to […]


Running “configure” on a 64 bit system returns missing library errors

By jbayer - Last updated: Thursday, February 10, 2011

Sometimes when building an open-source package using the “configure” script, you will get errors about missing libraries, even though you know the libraries are actually installed.  This usually happens on a 64 bit system. Assuming that the libraries are actually installed, and the pkg-config program is installed and working then what is happening is that […]


Linux-based Security Camera Solution

By jbayer - Last updated: Monday, January 31, 2011

With the explosion of inexpensive video cameras for computer use, (both USB and IP cameras), it has become fairly easy to set up a comprehensive video surveillance system.  You can go out and buy complete kits, which include a set of cameras and a central control station.  Or, you could roll your own, giving you […]


Installing Zabbix on a CentOS/RedHat system

By jbayer - Last updated: Friday, December 17, 2010

One of the core tasks of a good system administrator is monitoring systems, and responding to problems as quickly as possible. Zabbix is an open source monitoring system which offers advanced monitoring, alerting and visualisation features today which are missing in other monitoring systems, even some of the best commercial ones. Installing Zabbix, while not […]


Alternative CentOS Repositories

By jbayer - Last updated: Thursday, December 9, 2010

There are several repositories provided by CentOS and other 3rd party developers that offer software packages that are not included in the default base and updates repositories. While no list can be 100% complete, as anyone may announce an archive, it represents some major efforts and provides a summary of what each repository offers. These […]


How can I convert my running system to a RAID 1 System ?

By jbayer - Last updated: Wednesday, November 3, 2010

There are a number of online guides on how to convert a running Linux system to a RAID-1 setup.  Rather than repeat the same information, I’m providing you with a set of scripts which will do the conversion automatically.   While these scripts have been tested with multiple filesystems and in multiple ways, there could always […]


How to make a RAID1 Linux system boot from either drive

By jbayer - Last updated: Tuesday, November 2, 2010

There is a problem with Ubuntu and other distributions when you set up a system with a RAID-1 setup.  The installer only installs Grub to the first drive.  If the first drive fails, then even if all your data is on the second drive you won’t be able to boot from it. The following script […]


OpenVPN Boot and Shutdown problems with NFS filesystems

By jbayer - Last updated: Tuesday, November 2, 2010

How to fix a race condition with Ubuntu/Debian, OpenVPN and NFS volumes mounted over the VPN