CentOS - Spheron1

March 14, 2018

Building Bareos RPMs on CentOS 6 & 7

Bareos (Backup Archiving Recovery Open Sourced) is a popular open source backup system originally forked from the Bacula project, but they only publicly publish packages for the first release of each major version; updates are reserved for paying customers. The source code is available on GitHub however, so you can pretty easily build your own packages, even if exactly how...

May 14, 2014

Twitter integration not working in WHMCS

If you’re having problems with WHMCS’s Twitter integration feature on a CentOS/RHEL server, then chances are that you need to install the php-xml RPM. The Twitter integration in WHMCS uses jQuery to make a POST request to announcements.php detailing the number of tweets to retrieve. This then in turn connects to the Twitter API, parses the response and returns it...

WHMCS Comments: 0

December 29, 2013

SolusVM displaying wrong disk usage statistics for Xen PV VMs

Recently some of our Xen PV VMs started to show strange disk space usage statistics in SolusVM – despite there being plenty of space left on the disk in the VM, SolusVM was reporting that the disk was nearly full! I struggled to find any public information about this, but apparently it is a known problem with SolusVM and the...

SolusVM Comments: 0

December 15, 2013

SuperMicro ipmicfg utility on Linux

SuperMicro have a nice little utility called ipmicfg, which can be used to interact with the IPMI BMC from within your operating system. This can do all sorts of things with the IPMI BMC, however it’s really useful if you want to change the IP address details on the IPMI card without rebooting your system and going into the BIOS...

IPMI/Linux/Red Hat and CentOS/SuperMicro

September 11, 2013

Dell DSET on CentOS

Those of you unfortunate enough to have encountered the Dell technical suport department will know their love for the Dell diagnostic tools. Those of you who run CentOS and have been asked for a DSET report (Dell System E-Support Tool) will also know that the DSET tool refuses to run on an “unsupported” operating system. Luckily, DSET is quite easy...

Dell PowerEdge Comments: 0

July 28, 2013

Building httpd 2.4.6

When trying to build an RPM from the Apache source tarball, rpmbuild bails with: RPM build errors: Installed (but unpackaged) file(s) found: /usr/lib64/httpd/modules/mod_proxy_wstunnel.so The problem is that the mod_proxy_wstunnel.so file has been omitted from the httpd.spec file used to build the RPM. Extract the tarball, open up httpd.spec in your favourite text editor and scroll down until you find a...

Apache HTTPD/Red Hat and CentOS Comments: 0

June 26, 2011

EPEL NSD RPM and the missing PID file directory

NSD is a fantastic authoritative nameserver from NLnet Labs which was developed in conjunction with the RIPE NCC to be a highly scalable, secure authoritative nameserver which has no recursive features by design. In fact, it is such as good nameserver that it is used on three of the root namesevers (k.root-servers.net, h.root-servers.net and l.root-servers.net). Thanks to the EPEL project...

Red Hat and CentOS Comments: 0

August 16, 2010

Sysconfig ifcfg scripts and VLAN sub-interfaces

If you are using the ifcfg scripts in /etc/sysconfig/network-scripts to bring up VLAN sub-interfaces on a NIC and you are getting messages such as: Bringing up interface eth0.200: Device eth0.200 does not seem to be present, delaying initialization. instead of Bringing up interface eth0.200: Added VLAN with VID == 200 to IF -:eth0:- as you would expect, then make sure...

Red Hat and CentOS Comment: 1

August 16, 2010

HyperVM and yum update Transaction Check Errors

If you’re having file conflict problems when running “yum update” on servers with the lxlabsupdate repository for HyperVM (or Kloxo) installed then there’s a simple resolution: cd /var/cache/yum/lxlabsupdate/packages/ rpm -Uvh *.rpm –replacefiles –replacepkgs This should fix errors such as: file /usr/share/man/man1/pcregrep.1.gz from install of pcre-8.02-1.el5_5.1.x86_64 conflicts with file from package pcre-6.6-2.el5_1.7.i386 file /usr/share/man/man1/pcretest.1.gz from install of pcre-8.02-1.el5_5.1.x86_64 conflicts with file...

Red Hat and CentOS Comments: 0

June 19, 2010

Intel VT Virtualisation Technology on Dell PowerEdge servers

Somewhat annoyingly, Dell seem to like to disable Intel’s VT (Virtualisation Technology, sometimes called VMX) in the BIOS on their Dell PowerEdge servers, which means that you can’t use the Xen hypervisor to virtualise Microsoft Windows Server without changing this setting, which requires a reboot of the server to take effect. You can use omreport from the Dell OpenManage Server...

Red Hat and CentOS Comments: 0

Tag: CentOS

Building Bareos RPMs on CentOS 6 & 7

Twitter integration not working in WHMCS

SolusVM displaying wrong disk usage statistics for Xen PV VMs

SuperMicro ipmicfg utility on Linux

Dell DSET on CentOS

Building httpd 2.4.6

EPEL NSD RPM and the missing PID file directory

Sysconfig ifcfg scripts and VLAN sub-interfaces

HyperVM and yum update Transaction Check Errors

Intel VT Virtualisation Technology on Dell PowerEdge servers