Turn off screen reader Fedora 21

Issue:

There is no option to turn of screen reader in Fedora. How to turn of the screen reader.

Solution:

There are two ways to turn of the screen reader: easy way and super easy way.

The easy way:
Go to settings -> Universal Access -> Screen Reader OFF

Super easy way:
Use the shortcut key ALT + Super + S. It will open accessibility menu.  There you can turn off screen reader.

OpenShot Fedora 21 issue fixed

Issue: 

After updating from Fedora 19 to Fedora 21, Openshot doesn't lauch. It shows some error in terminal like

error: /usr/lib/libavdevice.so.53: not found

Solution:

Remove ffmpeg package

First remove the ffmpeg package. You can use the below command

yum remove ffmpeg*

It will remove all the dependencies of ffmpeg which includes VLC and Open shot. I think these package belongs to Fedora 19 and conflicts with new OS.

Install Openshot

Then install openshot by giving below command.

yum install openshot

It will install all the dependencies like mlt python, ffmpeg etc. Then try launching OpenShot, it will launch.

Which storage technology should I choose?

There are different storage technology in IT industry like Aix cluster, ZFS etc. Now IT industries were moving from Unix to Linux. So let's see which is the best storage technology we can choose to learn that will shape our career.

SANs and NAS administration is definitely an advanced area and to be really good at it, requires a lot of advanced knowledge. But realize that each vendor tends to do things very differently. While you have common technology components like LUNs and HBAs how each vendor manages and configures these are widely different. Even between versions a vendor can turn your world up side down. That said, SANs aren't changed that often - since they're expensive and can be used for a lot of different things during their life time. So it's not a bad thing to know - and if the company you work for has a lot of data to store, they'll most likely have a SAN or NAS which is key to maintain and understand.

But ... and there is a but ... it ties you to THAT installation. Depending on how you want to plan your career that may be good or bad. Just know that going into it. You can take training and certifications with EMC and NetApps too - so like with Linux you can learn how to do things right and efficient.

Lastly - things are changing. Well they always are in IT - but within storage a big movement towards commodity storage solutions using Open Source is happening. Gluster, Ceph, FreeNAS, GFS and a lot more are all solutions giving you the same type of reliable high end storage using commodity hardware and open source software. It means you can purchase your hardware where you buy your cheap commodity servers and create high performing storage solutions yourself. That doesn't mean companies are going to throw out their current expensive and closed storage solutions - nor that they'll all use the Open Source alternatives right now. But like Linux in the early 2000s - the change is happening. Slowly but surely. In 10 years you may be considered a IT dinosaur if you're using EMC Claiion for instance - sorta like if you're planning to purchase Windows to run a large web-site today.

It's not a black and white answer. Look around you - if you have a lot of companies that uses SANs/NAS in your area it's a GREAT skill to have right now. If not - consider it a lock-in and be careful going down that road unless you know what you're doing.

How to increase screencast length in Fedora 21?

In Fedora 19 there was no limit for screencast (capturing video of the screen). After updating to Fedora 21, I found that there is limit of 30 seconds. After 30 seconds the recording stops automatically.

Luckily, we can increase the limit without any third party tools in Fedora 21.

To increase the limit, open terminal and enter the below command

gsettings set org.gnome.settings-daemon.plugins.media-keys max-screencast-length 0

You see, in the end I have added 0 which means unlimited time. To check whether the settings is saved enter following command in terminal.

gsettings get org.gnome.settings-daemon.plugins.media-keys max-screencast-length

In both commands, the set and get options change. Set option is used to set the screen casting length and get option is used to show current screen casting length in seconds.

rpm command to downgrade package

If you have installed latest version instead of current version you can use the following command.

rpm -Uvh --oldpackage [filename]

Example:
I am running Fedora 21, but I installed rpmfusion repository of Fedora 22. So to downgrade it I used following command.



rpm -Uvh --oldpackage rpmfusion-free-release-21.noarch.rpm


Preparing...                          ################################# [100%]
Updating / installing...
   1:rpmfusion-free-release-21-1      ################################# [ 50%]
Cleaning up / removing...
   2:rpmfusion-free-release-22-0.1    ################################# [100%]

The above lines are the transactions that took place while installing rpmfusion of Fedora 21.

Where does sound recorder store file in Feodra 21

After update from Fedora 19 to Fedora 21, my sound recorder app got updated. It have all new GUI. The GUI is very simple, you will just see a record button and recorded sounds. It reminds me mobile phone GUI.

Options showing after double click on Clip 1

Simple GUI of Sound Recorder

Where does these files get stored?
The recorded files get stored in your home -> Recordings  (/home/recordings) directory. I was searching for it in Music folder. At last I found its location by searching in shell using find command.