Reliable Linux process identification 1/3: Concepts

Reading Time: < 1 minute

TL;DR takeaway: properly used, processes in Linux are powerful control over what happens in the computer. Knowledge of process control can be used to:

  • trim the performance, security and redundancy of a computer system
  • ..but the key is to be able to precisely and reliably identify a process

Justifying our interests

We could actually end up going unnecessarily deep. Let’s think about this. An operating system is made of 2 parts, roughly: the kernel / and various other parts.

Kernel is conceptually made of some parts, one of which is schedulers. The act of “scheduling” means putting the “competing” processes to be executed on the core, one at a time, in a specific way that essentially makes an illusion of multitasking. Scheduling also regards basically other things than only the CPU time, but we’ll justify this simplification for now.

Scheduling is a mathematical treatise whose purpose is to create beautiful statistics, to put it another way. It is one of the more – if not most – important function of a kernel. [Read on: Reliable Linux process identification, pt 2/3: Ideas]

Learning basics of Animation in Blender

Reading Time: 2 minutes

This article is for You: you know Blender this much: how to move around, create objects; go to the Edit mode for twiddling with the individual points (vertices) of meshes of your chosen Objects, and render still images.

But you don’t exactly know how to make animation. What are the minimum things needed to animate something, to begin with. Just the bare bones! Trust me, I know the feeling..

Learning Blender is fun – at times. The problem that I had was that whenever I tried opening up the box of Pandora just a little bit, a swath of things came bouncing out. I had too much at a time. And I thought that GIMP was bad! Well, I have to say that actually Blender has brilliant work behind it. It’s a gem of free software. Just hold on, be patient and read on.

Grasping clear concepts and doing some Blender kata with repeatable knowledge seemed obfuscated. At least I felt often that there was simply so many concepts pushing through windows that learning Blender was like poking your face between two mirrors and trying to see where your face copies end.

What are droids I need right now?

I know your pain. You want to animate. Animation happens by making Objects follow a Path. So, let’s roll the sleeves and make that!

Start as usual: open Blender.

  • make 2 things: An object you want to animate, and one Path
  • for Path making: <space bar> + Add Path
  • make one Camera, too
  • open a Graph Editor pane
  • the Graph Editor (pane) is your main tool for animation. More here.
  • To animate, you need to have a Object selected
  • Learn to use the Graph editor’s keyframe view (timeline)
  • Whilst an active keyframe is chosen, move your Object to desired position.
  • Save the new position of the Object by pressing ‘i’ (keyboard i) and choose ‘Location’ to be saved.
  • Now if you go between the two keyframes in Timeline (drag the cursor in Timeline by holding left mouse button), you will see a automatically created smooth (linear) axis-wise transformation from situation A to situation B.