Free Control Panel for VPS

Hi folks!
What is the best free/open-source control panel to manage a VPS?

I found these:
– Aapanel (
– Cipi (
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oracle grid control – How to send alert while using Python with GridDB Cluster

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version control – Strategies to organize multiple projects which may reference each other and managed by different teams in Git?

First actually I don’t think Git is a specific involved tool here, it can be any other Source/Version Control tool (TFS, SVN, …). The point here is how to deal with the scenario in which I have multiple projects, each project may reference other projects but managed by different teams.

If we can include all the referenced projects in a solution, it can be easy for debugging & getting up-to-date. However currently we just add references by dll. That means the referenced projects are not referenced directly but built into dll files first and added as references to the projects that need them. This way is not very good especially when we have to commit the dll files which will make the tracked file become larger and larger (e.g: the project code could be several MBs in size but may actually end up in more than several GBs in size). That’s just one of disadvantages. It can be harder when debugging and ensure that the referenced projects are up-to-date (at least to some working & stable version).

My team has thought of creating a private nuget packages source where we can publish all the referenced project dlls and they can be installed (by a specific version) into any other projects that need them. It sounds promising but I’m not so sure about how easy it can be when debugging (so that it’s just like referencing the source code directly).

Could you please share some thoughts or directions to deal with this scenario of managing multiple projects? Thanks!

differential equations – Asymptotic Output Tracking – Where to Place the Input Control Signal?

Asymptotic Output Tracking: Code Issues

I ask for help from specialists in differential equations, dynamical systems, optimal control and
general control theory;

I have the following system of differential equations:

begin{cases} frac{dx(t)}{dt}=G(t) \ frac{dz(t)}{dt}+z(t)=frac{df}{dt} \ frac{dG(t)}{dt}+G(t)=z(t) cdot alpha sin(omega t) \ frac{dH(t)}{dt}+H(t)=z(t) cdot (frac{16}{alpha^2}(sin(omega t)-frac{1}{2})) \ frac{dX(t)}{dt}+X(t)=frac{dx(t)}{dt} end{cases}

where, $x,z,G,H,X$ – variables; $f=-(x(t)+alpha sin(omega t)-x_e)^2$; $alpha, omega$ – parameters.

As an output $y$, I assign:

$y=tanh(k cdot H(t))$

As an reference signal $r_1$, I assign:


As an constant time $p_1$, I assign:


Well, I tried to program this in the Mathematica program and ran into a difficulty that I can’t get over yet. Question: in which of the equations should the control signal $u(t)$ be placed?

I chose the first equation, then the original system of equations will look like this:

begin{cases} frac{dx(t)}{dt}=G(t)+u(t) \ frac{dz(t)}{dt}+z(t)=frac{df}{dt} \ frac{dG(t)}{dt}+G(t)=z(t) cdot alpha sin(omega t) \ frac{dH(t)}{dt}+H(t)=z(t) cdot (frac{16}{alpha^2}(sin(omega t)-frac{1}{2})) \ frac{dX(t)}{dt}+X(t)=frac{dx(t)}{dt} end{cases}





S(t) = (Alpha) Sin((Omega) t)

M(t) = 16/(Alpha)^2 (Sin((Omega) t) - 1/2)

f = -(x(t) + S(t) - xe)^2

 asys = AffineStateSpaceModel({x'(t) == G(t) + u(t), 
     z'(t) + z(t) == D(f, t), G'(t) + G(t) == z(t) S(t), 
     H'(t) + H(t) == z(t) M(t), 
     1/k X'(t) + X(t) == D(x(t), t)}, {{x(t), xs}, {z(t), 0.1}, {G(t),
       0}, {H(t), 0}, {X(t), 0}}, {u(t)}, {Tanh(k H(t))}, t) // 

pars1 = {Subscript(r, 1) -> -1, Subscript(p, 1) -> -1}

 fb = AsymptoticOutputTracker(asys, {-1}, {-1, -1}) // Simplify)

pars = {xs = -1, xe = 1, (Alpha) = 0.3, (Omega) = 2 Pi*1/2/Pi, 
  k = 100, (Mu) = 1}

 csys = SystemsModelStateFeedbackConnect(asys, fb) /. pars1 // 
    Simplify // Chop)

plots = {OutputResponse({csys}, {0, 0}, {t, 0, 1})}

At the end, I get an error.

At t == 0.005418556209176463`, step size is effectively zero; 
singularity or stiff system suspected

It seems to me that this is due to the fact that either in the system there is a ksk somewhere, or I have put the control input signal in the wrong equation. I need the support of a theorist who can help me choose the right sequence of actions to solve the problem.

I would be glad to any advice and help.

permissions – Full control, Limited Access given through a group where the user does not exist?

I have a SharePoint site where, when searching for a user at site level (using check permissions) it comes back saying the user has “Full control, limited access – Given through the ‘Site Name’ Owners Group.

However, the user is not an Owner of the site and when I click into the Owners group, they are not listed in there either.

How is this user being provided with access at site level from the specified group when they don’t appear to be in that group and how would I go about visualising and removing these user permissions?

I should add that when I click the “There are limited access users on this site. Users may have limited access if an item or document under the site has been shared with them. Show users”. It doesn’t show any additional users, but instead replaces ‘Full Control’ with ‘Full Control, Limited Access’ against the Site Owners group.

gm.general mathematics – Control & Experimental Group Selection Methodology using STDEV and T-Test Methodology?

I would like to know if my methodology was ‘correct’:

I am trying to conduct an experiment on my stores.
I would like to find out the effect of a marketing campaign on the number of transactions.

Only about 20% of the stores are participating in the marketing campaign.

The original methodology was to use the entire 20% as the experimental group and the remaining 80% as the control group. Unfortunately, these two groups are incomparable in terms of number of transactions.
when plotted as box and whisker plots next to each other, their distributions are incomparable (mean, median, quartlies, min, max, etc).

So what I did was filter out the ‘outlier stores’ at each end until the box and whisker plots for each group were practically identical. I then ran a t-test on the filtered groups, we failed to rej the null (meaning that these groups are statistically the same prior to the promotion).

Now that we have 2 comparable groups for time -1, we run the promotion for a month.
after promotion month is over, we take the number of transactions from each group and run another t-test.
We Rejected the null in favor of the alternate Hypo, which is that these 2 groups are now statistically different with an alpha of 0.05.

My first question is: is this methodology okay ?

My second question is: alternatively from using box and whiskers and removing outliers until both groups’ descriptive stats are similar, can i use a normal distribution and STDEV to remove outliers and create comparable groups within my population ?
The box and whisker method worked to get a comparable groups as confirmed by the t-test, but is very manual. So i would like to create an automated method and was wondering if using a normal distribution and removing outliers by STDEV would be plausible ?

Sorry for the long read.
Thank you

version control – What is the **difference** between git-repo and meta tools in the context of multiple git source code repositories?

Regarding the tools repo and meta, in the context of multiple git source code repositories, what is the difference ?

Or do they basically do the same thing?

An article back in 2012 says: “Repo is a tool created by Google (…) works by providing a way to check out multiple projects (Git repositories) (…) provides a way to submit an atomic changeset that includes changes to multiple different projects. (…)” and says: meta is a tool for managing multi-project systems and libraries. It answers the conundrum of choosing between a mono repo or many repos by saying “both”, with a meta repo! (…) letting you execute them against some or all of the repos in your solution at once

EDIT : My earlier attempt to ask this was deleted for being of type “find or recommend tools… “. Now I am not here now asking for a recommendation, I am just asking are there any concrete difference between them! Thanks!

power automate – How to design a flow which can control other independent flows without building child-parent relation

How can we in MS flow control the execution of other flows?
To be more specific:
How can we do the followings in a flow:

1 -Check the status of other flows? e,g, running, idle
2- If they are running, for how long they are running?
3- Turn the other flows on or off?
4-a bit greedy, but can we check the value of a variable in other flows if they are in a running state? (e.g. Can we check the variable 'var_a' of flow B which is in the running state while we are in flow A (no child-parent relation between these flows)?

blockchain – Do some crypto-assets have an “admin key” that allow some users to exercise “unilateral control and influence” over the asset?

I am reading the SEC prospectus Coinbase’s initial public offering, available here. On page 20, it is written:

Many crypto assets have concentrated ownership or an “admin key”, allowing a small group of holders to have significant unilateral control and influence over key decisions relating to their crypto networks, such as governance decisions and protocol changes, as well as the market price of such crypto assets.

I am not familiar with the existence of such “admin keys” that allow some users to unilaterally change the properties of a token or a blockchain. Would anyone care to fill me in or provide some sources I can read?

media – I’m attempting to render responsive images and control art direction. Could somebody see whyI can’t get breakpoints.yml to be respected?

I’m creating a title/ hero-image section that consists of two 50/50 columns at desktop but then stacks at about tablet (e.g. 1024px)

I’m using a custom twig template for this content type.

I want serve WebP images if the users browser will tolerate that, I also want to serve responsive derivatives and control art direction (i.e. different dimensions and cropping depending on screen width).

To that end I’m trying to use the WebP module together with the Responsive Image module and image styles.

I’ve created two responsive image styles (PMP Hero Col One & PMP Hero Col Two) and six image styles (PMP Hero C1 Desktop, PMP Hero C1 Tablet, PMP Hero C1 Phone, PMP Hero C2 Desktop, PMP Hero C2 Tablet, PMP Hero C2 Phone) each with a scale and crop effect.

I’ve created a breakpoints.yml In my theme’s root directory and I can see its breakpoints within the Responsive Image configuration interface.
  label: pmp_hero_col_1_phone
  mediaquery: '(max-width: 900px)'
  weight: 0
    - 1x
  group: neiu_main.pmp_hero_col_1
  label: pmp_hero_col_1_tablet
  mediaquery: '(max-width: 1024px)'
  weight: 1
    - 1x
  group: neiu_main.pmp_hero_col_1
  label: pmp_hero_col_1_desktop
  mediaquery: '(min-width: 1025px)'
  weight: 2
    - 1x
  group: neiu_main.pmp_hero_col_1
  label: pmp_hero_col_2_phone
  mediaquery: '(max-width: 900px)'
  weight: 0
    - 1x
  group: neiu_main.pmp_hero_col_2
  label: pmp_hero_col_2_tablet
  mediaquery: '(max-width: 1024px)'
  weight: 1
    - 1x
  group: neiu_main.pmp_hero_col_2  
  label: pmp_hero_col_2_desktop
  mediaquery: '(min-width: 1025px)'
  weight: 2
    - 1x
  group: neiu_main.pmp_hero_col_2 

I’ve selected the appropriate breakpoint group in each of my responsive image styles.
Within each responsive image style I’ve selected “Select a single image style.” for each breakpoint and associated the image style I want with it.

I’ve tried setting the fallback image style to “None (original image)” & “empty image”.

I’ve tried rendering the responsive image style in my template like:

{{ drupal_image(node.field_pmp_hero_image.entity.uri.value, 'pmp_hero_col_two', responsive=true) }}

and like:

{% set heroCol2ImagePath = node.field_pmp_hero_image.entity.uri.value %}

    set heroCol2ResponsiveImageStyle = {
        '#theme': 'responsive_image',
        '#responsive_image_style_id': 'pmp_hero_col_two',
        '#uri': heroCol2ImagePath,
        '#attributes': { class: 'img-responsive', alt: 'MBA Students' },

{{ heroCol2ResponsiveImageStyle }}

In both cases I do get the picture tag and the appropriate srcsets:

HTML Picture tag markup

Also the derivatives are written to the file system in the appropriate directories and are available.

The problem I’m experiencing is that the breakpoints.yml is never respected i.e. the image never changes to the appropriate derivative. It’s always either the default or empty if the fallback is set to empty.

This makes me think there’s something wrong with my breakpoints.yml e.g. syntax, media queries, etc. So, I’ve tried about a zillion permutations without success.

I am able to get this working if instead of using the Responsive Image module at all, I manually do:

    <source media="(max-width:900px)" srcset="{{ heroCol2ImagePath|image_style('pmp_hero_c2_phone') }}">
    <source media="(max-width:1024px)" srcset="{{ heroCol2ImagePath|image_style('pmp_hero_c2_tablet') }}">
    <source media="(min-width:1025px)" srcset="{{ heroCol2ImagePath|image_style('pmp_hero_c2_desktop') }}">
    <img class="pmp-vtwo-hero-image" src="{{ file_url(heroCol2ImagePath) }}" alt="Flowers" style="width:auto;">

But, I don’t know how to then use the WebP module with this approach.

If somebody out there is able to point out what bone-head mistake I’m making, you’d forever have my gratitude.