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fixes gramm mistakes and adds extra chapters

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waldek 2021-07-06 07:45:51 +02:00
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modules/qualifying/learning_processes.md
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@ -198,7 +198,7 @@ You can use `htop` as well to send signals!
Have a try at this with the same long list of sleep command and not the behavior of the processes. Have a try at this with the same long list of sleep command and not the behavior of the processes.
By stopping and continuing a process you can probably explain me what the `S` column means now no? By stopping and continuing a process you can probably explain me what the `S` column means now no?
## Nohup and disown ## Disown
Up until now all of the commands and examples should work in both `bash` and `zsh`. Up until now all of the commands and examples should work in both `bash` and `zsh`.
To test the following command I advise you to take a `bash` shell because it's [posix](https://en.wikipedia.org/wiki/POSIX) compliant. To test the following command I advise you to take a `bash` shell because it's [posix](https://en.wikipedia.org/wiki/POSIX) compliant.
@ -305,6 +305,10 @@ The practice will explain it a lot better than some codeblocks.
Now why is the process only changing parent once the original parent terminates? Now why is the process only changing parent once the original parent terminates?
I'm asking you to look for an answer online but the solution can be found the realm of *signals*, especially the *hang up* [signal](https://en.wikipedia.org/wiki/SIGHUP). I'm asking you to look for an answer online but the solution can be found the realm of *signals*, especially the *hang up* [signal](https://en.wikipedia.org/wiki/SIGHUP).
## Nohup
TODO
## Zombie processes ## Zombie processes
Yes, there are such things as zombie processes. Yes, there are such things as zombie processes.
@ -376,7 +380,7 @@ Why do you think this is?
### Renice ### Renice
Nice values are that practical if we need to set them before we start a process no? Nice values are not that practical if we need to set them before we start a process no?
That's where the `renice` program comes into play. That's where the `renice` program comes into play.
It allows us to change the nice value of a running process with a very simple syntax. It allows us to change the nice value of a running process with a very simple syntax.
I would advise you to use `sudo` when changing the nice values because otherwise you'll constantly run into either `operation not permitted` or `permission denied` errors. I would advise you to use `sudo` when changing the nice values because otherwise you'll constantly run into either `operation not permitted` or `permission denied` errors.
@ -392,6 +396,10 @@ I would advise you to use `sudo` when changing the nice values because otherwise
➜ ~ git:(master) ✗ ➜ ~ git:(master) ✗
``` ```
## /proc virtual filesystem
TODO
## Exercises ## Exercises
To help you understand what happens to running and stopped processes I made a few python scripts you can download below. To help you understand what happens to running and stopped processes I made a few python scripts you can download below.