ROS is an open-source, meta-operating system for your robot. It provides the services you would expect from an operating system, including hardware abstraction, low-level device control, implementation of commonly-used functionality, message-passing between processes, and package management. It also provides tools and libraries for obtaining, building, writing, and running code across multiple computers

Sometimes recorded video, screecasts etc have a low volume, if you want to increase the volume without getting into too much complication, you can simply use ffmpeg for the same.

The command:

ffmpeg -i foo.mp4  -filter:a  "volume=5.0"  foo-high-volumet.mp4

Here:

ffmpeg is the command

-i assigns input file i.e. foo.mp4

-filter: for audio filter

Senario:  Accoridan effect basically is an idea where we have multiple paragraphs and their heading. Idea is to show a paragraph when the respective heading is clicked and all other paragraphs should be collapsed.

Senario:  To be able to access a particular cell <td></td> on one of the rows in HTML table. Using jQuery we can easily access a particular row and then target a cell of a HTML table easily by using the eq() traversal filter method and the :nt-child() pseudo-class  methods available.

Scenario:  While doing a screen recording using Vokoscreen, without stopping the recording I moved the file to another location. This resulted in the error "moov atom not found".

Shell like bash or sh are application which provide you a way to run other application/commands via the command line interface.

Most of the command and applications which you run (like vi, nano, ls, fsck etc) are separate applications, when you type in any of these commands the shell looks them up and runs them.

you can use a command called ‘which’ to find out where a particular command file is located. (e.g. which ls will give you where ls command is)

 Many of us will be migrating our site in next few months to Drupal 9.   Given below are the minimum requirements for installing Drupal 9.  Check out the hosting service before hand if your requirements are fulfilled.

Chocolate using Blender 3D.

Midnight Commander is a command line application with a text user interface and is is a free cross-platform file manager.

Linux Mint 20 Ulyana (XFCE/MATE/Cinnamon) Stable were released on 27th June 2020. I faced screen tearing problem during the initial screen itself. Here is a video which talks about how to solve the issue.