Install Ruby With Rvm

I explained today how you install ruby with rvm for a friend.

I thought it would be nice if I summarize this a bit.

First of all you want a ruby version manager there is rbenv or rvm and many more. But why you want this? Simply because you never know if you want to test something in an older version or with jruby. I assume that you are running a Linux with bash as your shell.

Enough blabla

Install rvm

\curl -sSL | bash

Load rvm

source .bash_profile

Enable autolib

rvm autolib enable

Install the lastest MRI Ruby

rvm install ruby


Why rvm and not rbev or X is much better than rvm, sure go ahead and use whatever you like (I don't care). And what does autolib? Autolib is a new feature of rvm which install the right native libraries for your system.

Dell T20 Review

Since I start using plex my HP ProLiant MicroServer was to slow to transcoding movies for Chromecast. So I had primarily two options, first I transcoding them not on the fly and save them to my NAS or I buy a new NAS. Obviously I bought a new one.

So I look around an found the Dell PowerEdge T20. The Key features for was the Intel Xeon processor which has enough power to transcoding movies. The possibility that you can extend the ram to 32GB is nice for ZFS which take advantage of that. Also nice is that the ethernet controller a Intel I217-LM is. Intel has a much better record for building stable and supported network controller.

The downsides on my opinion are that only 4 hard drives fit in the case. And these hard drive cartridges don't look really rock-solid for me.

ssd image


I upgrade the my RAM to 20GB, for this you can checkout my other blog post about this. For disks I use three WD Black with each 2TB space. And for my system drive I use one of my old SSD, just because I can.

For the future I plan to upgrade it with a network controller to play with things like LACP.


What should I say, in a normal office environment you can't hear it. But it has two fans so you can hear it if it's realy quiet, but for the most environments this shouldn't be that big deal. So if you searching for something quiet and powerful I can really recommend the Dell T20.

BIOS update

My BIOS version was A02. So you can simply go to the dell support site, download the BIOS .exe, copy it to your FAT formatted USB stick and select in the start menu (F12) BIOS Update. For some reason I must unplug it to restart.


I run a FreeBSD 10 on it. Maybe I extend on this a bit what software I use. But for now, I look for me that every part of the hardware supportet by FreeBSD by default. (I like that)

Dell T20 Ram Upgrade

I can confirm that Crucial Ballistix Sport (part number: BLS2CP8G3D1609DS1S00CEU) running fine in the Dell T20. This mean I have now 20GB ram \o/. Yeah you can mix ECC RAM with RAM that doesn't support ECC.

A extended review about the Dell T20, coming probably this week.

Note: This post is manly for people like me, who look first on google if someone running this successfully, since most time I don't want to buy certificate hardware.

Lack The Rack Part I

I got some 19 inch server. The problem I don't have a rack for it. So there are two options buy for a truck load of money a rack or build one on my own. So just buying a rack sounds boring, and I don't have a truck load of money.

First stepp

To build your own rack you need a table from ikea called lack. They are available in different colours and cost around 5$ -15$. They are exactly 19" and you can stack multiple of them to a large rack.


I invest some hours, to paint on the front site a logo.

img img img img img img


The assembly of the table is so easy, that I think even a monkey can do it.

Mount the server

My servers are kind of short, so I need to attach them from the backside a bit.

img img

And as you can see a 19" fit perfect in a lack table.

img img

Mount Nexus 5 On Fedora

I connect my phone with my laptop. And surprise it doesn't work.

So I google around and based on this: I found a solution. (at least for Fedora 20 and Nexus 5 with MTP).

Install libs:

sudo yum -y install fuse fuse-libs libmtp simple-mtpfs

Update your udev roles:

sudo vim /etc/udev/rules.d/51-nexus.rules

#LG – Nexus 5
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0666"

For Nexus 4 it's possible something like:

#Nexus 4
SUBSYSTEM=="usb", ATTR{idVendor}=="4ee1", MODE="0666"

Now just add aliases for it. For that add to your .bashrc these lines:

alias nexusmount="simple-mtpfs ~/your/mount/point"
alias nexusumount="fusermount -u ~/your/mount/point"

Now reboot to reload your udev rules and load the new modules.

After that just mount and unmount your device.