I made a small web application for a customer and everything is working now on a VPS. Stack:  nginx to route traffic and serve static files gunicorn to run several django workers that serve http daphne workers to serve websockets redis in a docker container to broadcast messages over channels (for chat-like functions) postgres database apscheduler because I need to be able to schedule &quot;events&quot; on the fly for any date (and be able to delete/reschedule them)  There is a lot of stuff going on on my VPS and I am very beginner in server management. Consequently, I am worried about stability and security. Today, for example, I found out a crypto miner has been using my server for the last 3 months.. Is there any service where I can just deploy this webapp and not worry about the server details? Or is it better to hire somebody for first setup and maintain myself? I would really love to just make it and give it to the customer.. To some extent I am willing to change my stack if it makes my worries go away :) Charlee
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The banner ads are in the wrong format for the right-hand ad slot:    These kinds of ads are not useful (because most of it is cropped) and should be excluded from being shown in that spot. I want to show that for $\gcd(a,b) = 1$ $a,b \in Z$   $\gcd(a+b, a-b) = 1$ or $\gcd(a+b, a-b) = 2$ holds.      I think the first step should look something like this:      $d = \gcd(a+b, a-b) = \gcd(2a, a-b)$   From here I tried to proceed with two cases. 1: $a-b$ is even, which leads to $\gcd(a+b, a-b) = 2$ 2: $a-b$ is odd, which leads to $\gcd(a+b, a-b) = 1$  My main problem I think is, that I do not know how I should include $\gcd(a,b) = 1$ in the proof.  Any help is appreciated. Thx in advance. Cherio Woltan I want to assign the result of an expression (i.e., the output from a command) to a variable and then manipulate it – for example, concatenate it with a string, then echo it.  Here's what I've got: #!/bin/bash cd ~/Desktop; thefile= ls -t -U | grep -m 1 &quot;Screen Shot&quot;; echo &quot;Most recent screenshot is: &quot;$thefile;  But that outputs: Screen Shot 2011-07-03 at 1.55.43 PM.png Most recent screenshot is:   So, it looks like that isn't getting assigned to $thefile, and is being printed as it's executed. What am I missing? Linear transformation of a binomial random variable? Let $X$ be a binomial random variable with parameters $n$ and $p$. Next, let: $$ Y = aX + b $$ I know that: $$ \mathbb{E}[Y] = \mathbb{E}[aX+b] = a\mathbb{E}[X] + b = anp + b \\ \text{Var}(Y) = \text{Var}(aX+b) = a^2 \text{Var}(X) = a^2np(1-p) $$ But how is $Y$ distributed? How do I remove a summoned Ender Dragon with no AI? So I used the command /summon EnderDragon ~ ~ ~ {NoAI:1} so that I would have an Ender Dragon that would just sit there.    I then wanted to get rid of it, but doing /killall EnderDragon didn't work, neither did /killallnpc, and I can't seem to do any damage, even with a diamond sword and maximum strength using commands.    I'm not sure why I can't get rid of it; I think it's because the dragon has no AI, but I need to get rid of it somehow, any ideas? I know that the rotation period of the moon equals its revolution period. It's just so astonishing that these 2 values have such a small difference. I mean, what is the probability of these 2 values to be practically the same? I don't believe this to be a coincidence. It's just too much for a coincidence. What could have caused this? Are there other schools for witches and wizards in the rest of the world? In the books they only speak of 3 schools, but what about Asian or American people?  And even more, were they affected by the events happening in Europe? A short story I read long ago about the phone system 'waking up' How to add a vertical line to a plot What's the action of banging two beers together called? When beers in cans or bottles are banged together in rejoice of the company you're with, what is the action called? On the websites, whenever the OP comments on an answer, or on his question, his name is highlighted. This is a handy feature because you can easily tell whether the comment is from the OP or not.   But on the Android mobile app (don't know about iOS),  this feature is not there. Can we have it please!? My Ubuntu 16.04 keeps disconnecting from the Wi-Fi (eduroam). Why? I haven't noticed any pattern and I'm sure the Wi-Fi works perfectly because I have no problems with the same computer using Windows 10. The Wi-Fi doesn't turn off though, it simply disconnects from the network and reconnects after about a couple of minutes.  I ran this and got:  lspci -knn | grep Net -A2 03:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01) Subsystem: AzureWave AR9462 Wireless Network Adapter [1a3b:2234] Kernel driver in use: ath9k Kernel modules: ath9k   Also running dmesg  Among the many messages the last one is:  [ 3818.806656] wlp3s0: Limiting TX power to 5 dBm as advertised by 00:23:eb:39:28:21   Any idea why this is happening?  Thank you. Category-theoretic limit related to topological limit? Is there any connection between category-theoretic term 'limit' (=universal cone) over diagram, and topological term 'limit point' of a sequence, function, net...?  To be more precise, is there a category-theoretic setting of some non-trivial topological space such that these different concepts of term 'limit' somehow relate?  This question came to me after I saw (  ) a surprising fact that generalised metric spaces can be seen as categories enriched over preorder $([0,\infty],\leq)$. Using PyQGIS to transform layer of polygons into layer of holes inside bbox? What is a referee in the manuscript submission process? Please submit, with the manuscript, the names, addresses (including   countries), and e-mail addresses of five potential referees who are   outside the authors' institutions and must not have conflict of   interest with the authors.   Do you think I should name 5 researchers from a similar area that are not affiliated with my university and co-authors? Is this what referees are? I have the following problem:  Let $a, b \in\mathbb{Z}$. Show that $\,\{ ax + by\ :\ x, y \in \mathbb{Z}\} = \{ n \gcd(a,b)\ :\ n\in \mathbb{Z} \}$   I understand that the Bezout's lemma says that $gcd(a,b) = ax +by$, so Im not really how you would go about proving the above, it doesn't really make sense to me. Any help is appreciated1 I am trying to balance underbraces in the equation below, how can I ensure that both underbraces at the same depth?  \begin{equation} y = \underbrace{ \left [ x^2 + r^2 (a^2+\frac{a^{0.3}}{b}) \right]}_\text{growth rate} \times  \underbrace{ C_0}_\text{initial} \end{equation} How to change the name of a thread Is it possible to bake dupliverts into one mesh for the BGE? (I have a large ground landscape that I use as the parent to duplicate trees, and the BGE doesn't support most modifiers.) Number of solutions of $P(x)=e^{ax}$ if $P$ is a polynomial