How do I get rid of possibly rogue process in Linux?
How do I deal with a compromised server?
How do I copyright my website? Undelete accidentally deleted records in Sqlite3 As title, possible? I have by accident deleted another record due to my ugly html interface in FireFox. The bad thing is this record delete is a root folder which the program automatically cascade delete everything :( How can I prove that $\,ax\equiv b\pmod{\! n}\,$ has a unique solution if $\,\gcd(a,n) = 1$?  I suspect that the Bezout identity for $\,\gcd(a,b) = 1$ is the key but I don't see how to proceed. In an ideal circuit, How can there be a current b/w points a &amp; b, when there is no potential difference and thus no electric field between a &amp; b? If there is no current, then where does current across the resistor come from, because that means no charge is coming from the battery (?). After the therapy, eight children (43%) became able to crawl/move on their back.   Or should I use "on their backs"?   Singular because each child only has one back, or plural because we're dealing with eight backs? Both DHCP and static IP addresses simultaneously on one interface We can use multiple IP addresses for a single interface in Linux (eg. eth0:0, eth0:1). But can we use DHCP and static IP at the same time? eth0:1 should have a static IP address and eth0:0 should be configured using DHCP.  How can we accomplish both? Divergence as transpose of gradient? In his online lectures on Computational Science, Prof. Gilbert Strang often interprets divergence as the "transpose" of the gradient, for example  (at 32:30), however he does not explain the reason.  How is it that the divergence can be interpreted as the transpose of the gradient? "have" vs."have got" in American and British English What is a reasonable sample size for correlation analysis for both overall and sub-group analyses? I have a specific requirement (probably silly!) for testing a browser of Chrome. I realize this requirement isn't the most logical, but politics being what they may I'd like to know the technical workaround.  I need to test a site in version, let's say, 28 of Google Chrome. Obviously Google runs a silent updater which can be disabled, but at this point they don't (to my knowledge) release old archives of the MSI installers (which I can easily use to reinstall and force a no-update option for testing). If we can get this working on a single instance then there's a possibility that a virtual machine or some other workaround will give us an easy restore point to meet this test.  If anyone has a good idea of where to start here that would be amazing.  I've already floated the "why are we doing this question?" and the answer is that it is part of the requirements so we need to make a best effort.  UPDATE:   FileHippo appears to only archive the online installer (automatic update)  OldApps doesn't archive Chrome anymore  OldVersion doesn't appear to have any Chrome Archives   UPDATE 2:  - The accepted answer's server is the correct solution here at this point in time. Basically speaking you're looking for the full install (30 or so MB). If you have an 800K file it is the online installer which automatically updates. $E(|X-Y|)$ for $X$, $Y$ i.i.d and uniform on $[0,1]$ What is $E|X-Y|$ when $X$, $Y$ are i.i.d and uniform on $[0,1]$?   I want to do something like   $$ E(|X-Y|)=\iint_{x&gt;y}(x-y)\;dxdy+\iint_{y&gt;x}(y-x)\;dxdy=2\iint_{x&gt;y} (x-y)\;dxdy $$  But am not sure how to solve that last double integral or if this setup is right. order of a sylow p-subgroup Is the use of "one of the" correct in the following context? Find all $n \in \mathbb{N}$ such that $\phi(n) = 4294967296=2^{32}$.  I managed to find that $16106127360$, $8589934592$, $10737418240$ and $12884901888$ are solutions for the equation, but I do not know how to find all of them. Where can I get an Ubuntu Installation CD/DVD/USB? I need to upgrade my existing Ubuntu system, and I also want to install Ubuntu on a new laptop.  I would like to have an installation CD or DVD to do both of these.  Where exactly I can order or request an Ubuntu installation CD/DVD/USB? "See somebody do" and "see somebody doing" Problem on Sum of Digits of a Number I was given this problem to Prove if $Q(n)=Q(2n)$ implies $9∣n$. Where $Q(n)$ be the sum of digits of $n$. I tried to use the fact that sum of digits is congruent to the number modulo $9$ but I had no luck. Any help is appreciated. It seems like to deleted too much files by rm -r and now I have the error of "the system is running a low-graphic mode" in Ubuntu and I have to work in Windows because of that.  However I can load it in recovery mode. I need to copy the files from Downloads folder to a flash drive. Downloads folder has them as I can see by ls command.   When I plug in a flash drive, there will be some messages saying that everything is ok (as I understood) and it's plugged. But when I go to /media/my_name and do ls then I don't see anything. I don't see anything in /run/media/my_name either(I'm not sure if should though).  I can't connect to the Internet for some reason. Ubuntu was installed by wubi.exe file.  How do I save the content of my Downloads folder to a flash drive? Is there a software utility to adjust screen gamma/brightness/contrast? Discourage questions being marked as answered within an hour or so of being posted