Red Hat and CentOS

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...

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

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

November 9, 2010

Using kill to display dd progress

How long has that dd process been running for now? Is it even doing anything? How long is it going to take? If you want dd to give you a progress update, then find out the process ID (PID) and then send the USR1 signal to it with kill -USR1 And dd will then print out the same records in/out,...

Red Hat and CentOS Comments: 0

September 16, 2010

The dreaded scrolling GRUB GRUB GRUB on startup

Rebooting a server is always stressful, particularly when you don’t have immediate physical access to it. Of course, when the server inevitably doesn’t come back up you need to either get directly on the local console or connect in via KVMoIP and one of the worst things you can see is “GRUB GRUB GRUB” scrolling past endlessly. This is a...

Red Hat and CentOS Comments: 0

September 12, 2010

Python setuptools and get_python_version is not defined

If you run into the below error when using setuptools (setup.py), then it’s quite possible that you’re using an outdated version of Python’s setuptools. In particular, the python-setuptools package in the CentOS yum repository is too old. Traceback (most recent call last): File “setup.py”, line 19, in ? setup(**metadata) File “/usr/lib64/python2.4/distutils/core.py”, line 149, in setup dist.run_commands() File “/usr/lib64/python2.4/distutils/dist.py”, line 946,...

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

July 18, 2010

Restoring the contents of /dev

Have you ever deleted everything out of /dev by accident (or even on purpose)? Although it may seem that all is lost or that you have a lot of work ahead of you, it’s actually quite easy to restore on a modern Linux system such as CentOS 5 (or the RHEL equivalent). The first thing you need to know is...

Red Hat and CentOS Comments: 0

Spheron1

Category: Red Hat and CentOS

Building Bareos RPMs on CentOS 6 & 7

SuperMicro ipmicfg utility on Linux

Building httpd 2.4.6

EPEL NSD RPM and the missing PID file directory

Using kill to display dd progress

The dreaded scrolling GRUB GRUB GRUB on startup

Python setuptools and get_python_version is not defined

Sysconfig ifcfg scripts and VLAN sub-interfaces

HyperVM and yum update Transaction Check Errors

Restoring the contents of /dev