Proxmox 4.0 Has Been Released
The Proxmox VE team have released the latest version of Proxmox VE, Proxmox VE 4.0. There are some pretty big changes in Proxmox version 4 which really warrant the new 4.0 version increment. See my...
View ArticleHow To Find Your Public IP Address From The Terminal
Finding the IP address of your local machine couldn’t be easier – ipconfig on Windows or ifconfig on Linux will bring up all of your local network interfaces and list the IP addresses associated with...
View ArticleConfigure Zentyal 4.2 To Move SPAM Email To Junk Folder
Zentyal, the “all-in-one” exchange server replacement and does quite a good job delivering AD-like management and authentication, file shares, email and webmail straight out of the box. The...
View ArticleHow To Fix A Full /boot Partition on Linux
Utilities such as apt-get generally install kernel updates by adding the new kernel to the Linux boot list and set it as the default. This means that the next time the system boots, the new kernel will...
View Articleqcow2 Disk Images and Performance
qcow2 is a virtual disk image format developed by the guys who created QEMU and is one of the most versatile virtual disk formats available. It’s the default and preferred virtual disk format for the...
View ArticleHow To Change The Zentyal Certificate Algorithm From SHA-1 To SHA256
As of Zentyal version 4.2 the bundled certificate authority (CA) module is creating signed certificates using the SHA-1 algorithm which is an old algorithm and pretty much deprecated. Google Chrome,...
View ArticleHow To Proxy The Apt-Get Package Manager
If you’re using Debian, Ubuntu, or any similar distribution which uses apt-get as it’s package manager and you’re behind a http proxy then you’re going to need to tell apt-get what your proxy settings...
View ArticleScript To Create A Swapfile On Linux
This 5 line script will quickly create a 512MB SWAP file that will be automatically mounted on each machine reboot. It assumes you don’t already have a swap file enabled. The script creates a 512MB...
View ArticleConvert Virtual Disk Image VMWare VMDK to VirtualBox VDI
Oracle’s VirtualBox can use a few different virtual disk types, however their own disk type is VDI (VirtualBox Disk Image). It’s not one of the most widely used formats so if you’ve downloaded a VM,...
View ArticleStart Ubuntu Without Starting The Gnome Desktop (text mode)
If you’ve installed a desktop, such as Gnome, on Linux you may not need it all the time. Some of the time taken to boot your machine when you first turn it on is used by loading the GUI and everything...
View ArticleExport OBIEE RPD Documentation (Data Lineage) From The Command Line
The OBIEE Administration Tool provides a useful utility for exporting the data lineage held within the RPD to a CSV file. The linage is pretty comprehensive and covers everything from Presentation...
View ArticleProxmox 4.x bind mount – mount storage in an LXC container
An LXC containers storage is simple to set and maintain and is usually done through either a Web based GUI or a command line utility. It’s simple to set the size of disk allocated to an LXC container,...
View Articleqcow2 Physical Size With Different preallocation Settings
The qcow2 image format is the defacto image format for KVM/ QEMU virtual machines. The format provides various parameters that can be configured when creating the image, each with their benefits and...
View Articleqcow2 image format and cluster_size
There are various things you need to consider when creating a virtual disk for a virtual machine, such as the size of the disk, if the disk is sparse or not, compression, encryption, and various other...
View ArticleUse A File As A Linux Block Device
Just like when creating a SWAP file, you can create a file on a disk and present it as a block device. The block device would have a maximum file size of the backing file, and (as long as it’s not in...
View ArticleCeph Minimal Resource ceph.conf
The below file content should be added to your ceph.conf file to reduce the resource footprint for low powered machines. The file may need to be tweaked and tested, as with any configuration, but pay...
View ArticleMount A loop Device In An OpenVZ Container
You can pass a loop device through to an OpenVZ container with the vzctl command. You’ll need to mount the loop device on your host, as there is no support within an OpenVZ container to mount the...
View ArticleSmall Scale Ceph Replicated Storage
I’ve written a few posts about Ceph, how it works and how it’s set up and it mostly revolves around large scale storage for storing things like virtual machines. This post will focus on using Ceph...
View ArticlePersistent Ceph Mount Point
Once you’ve got a Ceph cluster up and running you’re going to want to mount it somewhere. This guide assumes that the mount point will be on a machine that isn’t running Ceph, however if you’re...
View ArticleReset The root MYSQL/ MariaDB Password
Get Social!If you’ve lost or forgotten the root user password on a MySQL or MariaDB server you’ll want to reset it and leave all the other accounts and data intact. Fortunately it’s possible, but...
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