Author: rchapin

A couple of months ago I stopped being able to purchase anything through the Google Play Store on my Nexus 7 Android device.  There were a number of different errors that were displayed:

General error messages:

• Couldn’t sign in. There was a problem communicating with google servers.  Try again later.

From the Google Play app:

• “Authentication is required.  You need to sign into your Google Account.” 

I tried everything:

• Re-installing Play
• Dumping the cache and disabling and re-enabling Play
• Doing

→ Continue reading “Couldn’t sign in. There was a problem communicating with google servers. Try again later Error On Nexus 7 Tablet”

Instead of having to write a test app, here is a handy online tool for regular expression testing in multiple languages.→ Continue reading “Regular Expression Testing”

I was having some funky issues with Eclipse and m2e not properly reading the pom.xml and setting up the .classpath properly when importing an existing Maven project into Eclipse from a cloned git repo.

When I did the following:

• Go to File/Import/Maven/Existing Maven Projects
• Chose the root dir of the the existing directory

I got the following error:

An internal error occurred during: “Updating Maven Project”.
Unsupported IClasspathEntry kind=4

Initially, I solved it with a series of back-and-forth commands in → Continue reading “Importing Maven Project from a Cloned Git Project into Eclipse Juno SR2 with m2e”

I am running an Ubuntu 12.10 machine and I had to compile and install a jsvc binary for an older version that I didn’t have a package that I could install via dpkg or apt-get install.

Running configure came off without a hitch.

Running make resulted in the following error:

gcc -ldl -lpthread jsvc-unix.o libservice.a -o ../jsvc
libservice.a(dso-dlfcn.o): In function `dso_unlink’:
/usr/local/src/daemon-1.0.1/src/native/unix/native/dso-dlfcn.c:41: undefined reference to `dlclose’
libservice.a(dso-dlfcn.o): In function `dso_link’:
/usr/local/src/daemon-1.0.1/src/native/unix/native/dso-dlfcn.c:36: undefined reference to `dlopen’
libservice.a(dso-dlfcn.o): In function `dso_symbol’:
/usr/local/src/daemon-1.0.1/src/native/unix/native/dso-dlfcn.c:47: → Continue reading “Fixing Compile Error: undefined reference to ‘dclose’ (dlopen, dlsym, and/or dlerror)”

I typically like to have more than 4 workspaces for my X Windows sessions.

Under Ubuntu 12.10 there is a little trickey involved in updating the default configuration.

First you need to install the compizconfig-settings-manager.  This will enable you to configure the workspace switcher and some other system configs.  Be careful, this will also allow you to break things so only configure what you understand via compizconfig-settings-manager.

Install ccsm:

• # apt-get install compizconfig-settings-manager

To run invoke (as root):

• # ccsm

→ Continue reading “Configuring the Number of Workspaces on Ubuntu 12.10”

If you want to run a headless VM under VMPlayer simply add the following to your vmware preferences file ($HOME/.vmware/preferences):

pref.vmplayer.exit.vmAction = “disconnect”

Restart VMPlayer and fire up your VM.  When you quit that VMPlayer instance it will ask you if you are sure that you want to quit and leave the virtual machine running.

When you quit the player the VM will now be running headless.→ Continue reading “Running a Headless Virtual Machine under VMPlayer”

I am running CentoOS 6.3 and have set up a local nameserver.  As a result, I’ve customized my version of /etc/resolv.conf to include both the IP of my local nameserver as well as a domain and search configuration directives.

When I restarted the machine, or if I restarted networking resolv.conf was overwritten.

It turns out that the contents of the ifcfg-ethN files determine how the network scripts behave and how, or if resolv.conf is modified programatically.

To prevent this make → Continue reading “Preventing resolv.conf From Being Automatically Overwritten with Each Restart or network restart”

I am working on building some 508 Compliant/Accessible web sites and am testing out how well the navigation works using only the tab key.

Under Mac OS X with Firefox, Opera, and Safari, by default, the tab key does not cycle through all of the links on a web page.

Firefox:

• Go to: System Preferences/Keyboard/Keyboard Shortcuts
• Click on the ‘All controls’ radio button towards the bottom of the dialog under the text that says: ‘Full Keyboard Access: In windows

→ Continue reading “Tabbing To Links Problems in Browsers under Mac OS X”

If you want to allow a popup from a file accessed via file:///home/rchapin/some_dir/somefile.html, open FireFox’s Preferences, click on the Content tab, and click on the ‘Exceptions’ button adjacent to the ‘Block pop-up windows’ check box.

Then enter ‘<file>’ in the ‘Address of website:’ field and click the ‘Allow’ button.→ Continue reading “Allowing Popups in FireFox from Locally Sourced Files”

I am installing Eclipse on Mac OS X Mountain Lion.  Unpacking the
.tar.gz was no problem, however, when I went to run it for the first
time I got the following error message:

Your security preferences allow installation of only apps from the Mac App Store and identified developers

To add Eclipse to the list of ‘approved’ applications run the following command in a terminal:

xattr -d com.apple.quarantine /path/to/Eclipse.app→ Continue reading “How to Add an Application to the Mac Approved Software List”