l o o s e l y typed

Using fade-in effect with fullpage.js slides

Update (08/09/2016): Starting version 2.8.6, fullpage.js now has built-in support for fade-in effect for slides via the 'faddingEffect' extension.

fullpage.js offers the option to display slides in sections which navigate horizontally. The plugin uses a scroll-left or scroll-right transform for changing slides.

The plugin however doesn't support cyclic loop back for slides. This means that after the last slide, the slides container will scroll-left all the way to the first slide. If there are 3 or more slides, this can be an unwanted effect.

An elegant solution to this is to nullify the scrolling and use a fade-in effect for each slide. This can be achieved by using the plugin's options to hook callbacks on slide transitions as shown below.

Java initialization errors on Linux

Java (JVM) can fail to start and throw error messages like these:

$ java -version
Error occurred during initialization of VM
Could not reserve space for ObjectStartArray

$ java -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.

There can be several reasons behind this and increasing the heap size and permgen size of the JVM often fixes this issue.

However, such errors can still occur even if the heap size and other JVM parameters have been setup correctly. In such cases, the issue is often with the system level configuration.

On Linux, this issue can occur if the virtual memory size limit is not sufficient enough. To fix this:

On RHEL, execute: limit vmemoryuse unlimited
In bash, execute: ulimit -v unlimited

Fixing sticky Control key issues with Citrix Reciever 13.0 on Ubuntu

Citrix 13.x is known to have issues on Ubuntu and other Linux flavours. One such issue is that the Control (Ctrl) key gets stuck in the Citrix Reciever session after it is pressed for the first time. This issue has been reported by several users on Citrix forums but Citrix hasn't officially addressed it so far.

To fix this issue on Ubuntu, edit these two files:

~/.ICAClient/wfclient.ini

Replace 'KeyboardLayout = (User Profile)' with 'KeyboardLayout = US-International' (or your preferred keyboard layout)

/opt/Citrix/ICAClient/config/module.ini

Replace 'UseLocalIM=True' with 'UseLocalIM=False'.

If the sticky Ctrl key issue is still not fixed, update Ubuntu system settings to not show the mouse location when Ctrl key is clicked. Instructions can be found here.

If the issue still persists, try these links:

Related resources:

CitrixICAClientHowTo (contains installation instructions for Ubuntu)

Fixing Android shutting down on screen lock

There are many reasons that can cause Android 4.x versions to shut down on screen lock. If you start facing this problem, then the first thing that you should do is revert the most recent changes - change in settings, newly installed applications etc. - and check if it fixes the problem.

Some known reasons for this issue are -

Netflix app on Android 4.3

http://www.androidcentral.com/netflix-and-google-working-android-43-device-lock-solution
http://forum.xda-developers.com/showthread.php?t=2377304&highlight=chromecast
In some cases this is known to have frozen the Android device which required a hard reset to fix.

Enabling developer options and turning off all animations can cause the device to shut down on screen lock

Enabling 'Settings -> Developer Options' and changing a couple of settings to disable animations can cause this bug. Switching off developer options fixes the bug. Alternatively, you can keep developer options enabled but ensure that the 'Window Animation Scale' option is not disabled/switched off.

Google Apps standard account alternative - Microsoft Outlook.com

Also see - Google Apps standard account alternative - Zoho Apps Lite suite

Checkout this pretty comprehensive post by Derrick Wlodarz -

http://betanews.com/2013/08/26/how-to-use-outlook-com-as-a-free-custom-domain-email-host/

How to mount disks at startup with custom file/directory access permissions in Ubuntu

Alternate link - http://swerdna.dyndns.org/susentfs.html
Google webcache link

Note: The mount options flags - fmask, umask, and dmask - might not work if the gid option is not set.

Enabling/disabling auto start up services in Ubuntu

Services which are automatically started on boot-up can be enabled or disabled using the BootUp Manager (BuM) application in Ubuntu. BuM can also be installed via apt-get -

sudo apt-get install bum

Instructions for other ways to install BuM are provided on the project's homepage linked above.

Also check this great answer on askubuntu for other ways to accomplish this. The upstart method of creating override files described in that answer also works great.

Some typical services which don't necessarily need to be started on boot are -

mysql
apache(2)
postgresql/postgres-xc (if installed)
vsftpd - a FTP daemon
zramswap - might not be required on systems with sufficient RAM (~ 4GB or higher)
bluetooth

All services that are disabled from auto-start can be manually started when required using this command -

sudo service <service-name> start