Critical error on Couchapp push with Ubuntu

I am hoping that in posting this, someone is able to save a little time and frustration.

On my Ubuntu 10.10 machine with CouchDB 1.0.1 installed, I began experiencing the following error every time I attempted to ‘couchapp push’ my couchapp changes:

[CRITICAL] Expecting object: line 2 column 3 (char 4)

After a bit of noggin scratching (and perhaps a little mumbled cussing), I started thinking about the fact I had not upgraded my couchapp install since long before I last upgraded CouchDb.

Running the following cleared up all error and put me back in the happy land of  ‘couchapp push’:

“easy_install -U couchapp”

Yup… Just a version issue…  Hope this saves someone a few gray hairs…

 

-Matt

nVidia Drivers with Compositing on Ubuntu 10.04 Lucid Lynx

nVidia LogoOk.  I will admit it.  I love compositing (Compiz) in Linux.  I absolutely adore it.  Clearly, this can be a bit of a problem as compositing on NVidia cards (more specifically using the Linux proprietary drivers) in Linux can be a bit of a challenge (understatement) at times.

Post-Lucid-upgrade has proven to be one of these times.  After having a smooth dist-upgrade and eventually a full, fresh install on my Eee 1000HE, I decided to forge forward with installing Lucid (x86 – reasons for we can debate elsewhere)from scratch on my custom built desktop recently.  As was the case with my netbook, Lucid installed largely without a hitch (See previous Grub post).

Once up and running, I of course wanted to get nVidia up and running.  For some reason on my SLI enabled (dual 8500GTs) desktop, I have never been able to get the repo nVidia drivers to work without issue.  Unfortunately after some trial and error, I was unable to get the nVidia supplied drivers up and running – after reading through some Lucid docs, I found out that the newest nVidia driver is currently incompatible with some of the system changes made with Lucid.

Fortunately, this time, the ‘nvidia-current’ from the repos did work for me!  Here is what I did to get it up and running in case you encounter the same ‘black screen errors that I did when installing from within Gnome.  I can’t say why it didn’t work in the GUI for me, but it didnt…

First, I had to get into a working shell by booting into “recovery mode” from grub – its a menu option below your normal boot item.  Once prompted, I selected netroot, which provides network access from the shell.  To get things installed properly, I had to get to init level 3:
$ initlevel 3

Then log in using your normal user login.

Get needed files:
$ sudo apt-get install build-essential linux-headers-`uname -r’

Blacklist nouveau by adding ‘blacklist nouveau’ to your blacklist.conf:
$ sudo nano /etc/modprobe.d/blacklist.conf

Install latest stabled nVidia repo drivers:
$ sudo apt-get install nvidia-current

Finally, generate the nVidia xorg.conf:
$ sudo nvidia-xconfig

After completing the above, I was able to reboot (“$ sudo reboot now“) into my nVidia backed Gnome desktop and finish completing my nVidia setup (ALT+F2, “gksu nvidia-settings“).  Then finally, I was able to get my Compiz back up and running – which came with its own problems and will be covered in another post!

Hope this helps!
-Matt

Ubuntu 10.04 (Lucid Lynx) Upgrade – 1000HE EeePC

So… I decided to bite the bullet and forge forward with the dist upgrade from 9.10 to 10.04 last night… Ok, so let’s be honest – I let curiosity take control once again, allowing my cautious mind to be overridden: allowing the entry of ‘sudo update-manager -d’ in the terminal…
This was about 11PM last night – I awoke to about 90% completion about 6am… This in itself gave rise to concern with me – not that it actually ‘means’ anything in itself, but – well, I just know that a lot is being swapped out in this release and the removal of HAL alone has had me nervous (I understand the decision, but such changes can mean fun for early adopters).
I am however happy to say that everything seems to be working great after the upgrade to 10.04. I haven’t had time to put it through its paces properly, but all systems currently seem go and all seems to be functioning at least as well as before – always a welcome thing when moving to an Alpha release of Ubuntu.

Kudos, Ubuntu team! This Alpha upgrade has been the smoothest for me to date…

I will post back if I encounter anything – neat and new or newly broken…

Google’s Newest Toy – Installing Go in Ubuntu 9.10

Setting up Google Go in Ubuntu 9.10

Google Go

Google Go

Go is Google’s newest offering to the development community.  According to the project’s page, Go is an expressive, concurrent, garbage collected programming language that is simple, fast, safe, concurrent, fun and (best of all) open source. Touted as a cross between C/C++ and Python, Go seems to be generating a lot of buzz and hoards of seemingly early adopters despite having surfaced only earlier today (11.10.2009) .  Of course this is somewhat expected – what has Google ever released that didn’t generate it’s share of hype/buzz/excitement associated with it?

I bit.  I am guessing since you are reading this, you did too.

Getting Ready to Go

EDIT:  For more updated discussion on this, please head to my thread on Ubuntu Forums – http://ubuntuforums.org/showthread.php?t=1322518

The following instructions detail the steps that I used to setup Go on my x64 Ubuntu 9.10 (Karmic Koala) box.

Standard disclaimer: Your mileage may vary.  For me everything was pretty much straight forward when following the maintainer’s provided setup instructions (http://golang.org/doc/install.html). The only hiccup I encountered during setup was an error with a test during make – Error 2 in [net.test]. A quick bounce over to #go-nuts resolved that – friendly go-nut knowledge base, iant, advised me that there was an issue with this test on some machines in the release version and that I should pull an update. Update pulled, problem fixed.

For simplicity sake, I am working from the gnome-terminal. Access bash as you see fit.  When you see ‘$’, it denotes a command to enter in the CLI (Command Line Interface).  When you see ‘>’, it denotes and output line.

FYI – My Machine Info:

$uname -a
>2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:05:01 UTC 2009 x86_64 GNU/Linux

Installing Required Tools

Install Python Setup Tools if not installed – Makes installing Mercurial in Ubuntu easy.

$sudo apt-get install python-setuptools

Install Mercurial (using your newly installed Python Setup Tools):

$sudo easy_install mercurial

Install GCC (to build Go):

$sudo apt-get install bison gcc libc6-dev


Setting Up Your Environment

1) Make ‘bin’ directory for go – You may have one – this will create it for you if you don’t:

$mkdir ~/bin

2) Setting up environmental variables:

Edit your Bash environment variables to include the Go required variables as well as making sure your bin folder is in the $PATH

$cp ~/.bashrc ~/.bashrc.bu
$gedit ~/.bashrc

Add following to your .bashrc:

#Google Go Vars
export GOROOT=~/go
export GOOS=linux
export GOARCH=amd64
PATH=${PATH}:$HOME/bin

Reload .bashrc

$source .bashrc

Note: You can close your terminal session and restart terminal instead. Up to you.

Check out Go ( to your Go root using Mercurial)

$hg clone -r release https://go.googlecode.com/hg/ $GOROOT

Note: I had to pull an update due to errors during make (details below with build instructions):

$cd $GOROOT
$hg pull -u

Build Go

$cd $GOROOT/src
$./all.bash

If successful, results should be:

>— cd ../test
>0 known bugs; 0 unexpected bugs

Note on make errors: Before pulling an update on the repository, make resulted in:

>make[1]: Leaving directory `/home/eznet/go/src/pkg/net’
>make: *** [net.test] Error 2

Updating via the ‘hg pull -u’ command above resolved this issue and allowed make to complete as desired.

GO play with Go

Tutorial: http://golang.org/doc/go_tutorial.html