Tag Archives: CentOS

Centos 6 Bonjour Hostname Install

With all the virtual machines I run on my local network, remembering host IP’s off the top of my head becomes pretty unmanageable. Installing the avahi package for CentOS servers provides a nice way for automatic hostname detecting in app’s supporting Bonjour discovery (like iNet for OS X).

yum install avahi
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Installing VMware Tools in VMware Fusion with CentOS Minimal (No GUI)

This guide assumes you already have successfully installed a CentOS virtual machine within VMware Fusion.

Launch your desired Virtual Machine and from the menu bar within VMware Fusion, select

Install VMware Tools

. This will load an iso and simulate a cd-rom has been inserted.

VMware Tools requires Perl as a dependancy, we need to resolve it before we can begin with the installation.

yum install perl

We need to mount the cd-rom within the guest virtual machine before we are able to access its content. We do this by
Creating a new folder to mount the cd-rom in.

mkdir /mnt/cdrom

Then we mount the cd-rom into the folder we just created. The fact that it is read-only is fine.

mount /dev/cdrom /mnt/cdrom

Now we need to access the disk and extract the tools somewhere.

cp /mnt/cdrom/VMwareTools-XXX.tar.gz /tmp

Change our working directory to tmp (shorter commands make life a little easier).

cd /tmp

The extracted files are compressed, we need to uncompress them.

gunzip VMWare-Tools-XXX.tar.gz
tar xvf VMWare-Tools-XXX.tar

Change working directory again into the newly decompressed folder.

cd vmware-tools-distrib

Finally, lets begin the VMware Tools installation.. just follow the onscreen instructions (I usually just leave everything as default).

./vmware-install.pl

See, easy peasy!

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Visudo Command not found – CentOS

Unless you have the package ‘sudo’ installed on your system, any attempts of issuing the ‘visudo’ command will fail. Classic school boy error, but one easily made.

The remedy..

yum install sudo
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Set Static IP Address in Centos

Using your favourite text editor (vi) open the default network configuration for the network adapter you wish to configure. I wish to assign a static IP to the default ethernet adapter (eth0). You will need superuser privileges so remember to use sudo

sudo vi /etc/systemconfig/network-scripts/ifcfg-eth0

For the purpose of this post I will be using the following typical network configuration.

  • Host IP Address: 192.168.0.100
  • Netmask: 255.255.255.0
  • Gateway: 192.168.0.1

Update the following highlighted fields with your relevant network settings.

DEVICE="eth0"
BOOTPROTO="static"
HWADDR="00:11:22:33:44:55" 
NM_CONTROLLED="yes"
ONBOOT="yes"
IPADDR=192.168.0.100
NETMASK=255.255.255.0
GATEWAY=192.168.0.1
TYPE="Ethernet"
UUID="9a6aae04-2b82-4986-951a-1081c0012345"
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Install Twisted (Python) on CentOS 6

Make sure the current system is up-to date

yum update

Install the necessary packages required to satisfy Twisted’s dependancies.

yum install wget python-devel python-zope-interface

Also install the Development Tools

yum group install “Development Tools”

Download the Twisted Framework (example location: ~/src)

wget http://twistedmatrix.com/Releases/Twisted/12.1/Twisted-12.1.0.tar.bz2

Extract files and install

tar jxvf Twisted-12.1.0.tar.bz2
cd Twisted-12.1.0.tar.bz2
python setup.py install

Test the installation was successful by creating a Python test file.

nano twistedTest.py

Insert the following lines:

import twisted
import twisted.web

Save the file

Ctrl-X (Enter filename when prompted)

Execute the file with hopefully no errors

python twistedTest.py

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