I can't install CMake on Ubuntu 18.10 because I get an error: Ign.:1 http://pl.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-libc-dev amd64 4.18.0-17.18 Error:1 http://security.ubuntu.com/ubuntu cosmic-updates/main amd64 linux-libc-dev amd64 4.18.0-17.18   404  Not Found [IP: 153.19.251.225 80] E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/l/linux/linux-libc-dev_4.18.0-17.18_amd64.deb  404  Not Found [IP: 153.19.251.225 80]  When I try to use upgrade, I get next error: E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) E: Failed to lock directory /var/lib/apt/lists/ W: Problem przy odlinkowywaniu pliku /var/cache/apt/pkgcache.bin - RemoveCaches (13: Brak dostępu) W: Problem przy odlinkowywaniu pliku /var/cache/apt/srcpkgcache.bin - RemoveCaches (13: Brak dostępu)
I get this error whenever I try to install programs using the terminal:  home@ubuntu:~$ apt-get install myunity E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?   Also I'm unable to install updates using the terminal.
How many non-negative integer solutions does the equation $3x + y + z = 24$ have? How to customize MacBooks' keyboard? I spilled a juice on my MacBook-Pro keyboard. Consequently, some keys like 2, esc and tab don't work anymore on my keyboard.   Is there anyway to change those disabled keys with combination of some other keys, like Fn,Ctrl, Option+ something, using an app or a command? Why does the sizeof operator return a size larger for a structure than the total sizes of the structure's members? pattern of moving electrons in wire under AC Meaning of 'const' last in a function declaration of a class? How can the speed of sound increase with an increase in temperature? Do I make money in the stock market from other people losing money? how to scale math font only For ridiculously small hard drives (8GB), what Ubuntu Based (although not necessarily official) distribution offers the smallest installed size?  Let me clarify: I still want a certain amount of personal file space, preferably a few gig. I also don't have a problem with performance, while it is mediocre, a 2.6GHz single-core and 1GB of ram suffice to run ubuntu fine, but i find that it  uses 6-7GB of space. I am aiming for closer to 4GB. Evaluating limit (iterated sine function) The limit is   $$\lim_{x\rightarrow0} \frac{x-\sin_n(x)}{x^3},$$  where $\sin_n(x)$ is the $\sin(x)$ function composed with itself $n$ times:  $$\sin_n(x) = \sin(\sin(\dots \sin(x)))$$  For $n=1$ the limit is $\frac{1}{6}$, $n=2$, the limit is $\frac{1}{3}$ and so on.  Can we define a recurrent relation upon that given hypothesis? Also, how do I involve $n$ into calculation, because the final limit will depend on it?  Any suggestions on how to tackle this?  Thank you! Do we need inertial frames in Lagrangian mechanics? Silencing "Your disk is almost full" notification What are nodes, and how do I use them? I'm a bit new to Blender, and in trying to learn more, I've stumbled across nodes.  What are nodes, and how do I use them? How do I technobabble without sounding like technobabble? On occasion, I've had reason to describe obviously fictional technical processes in-character. I'd like to be able to describe on these occasions without sounding like I'm saying utter gibberish. But it's not straightforward to do, particularly if I have to make stuff up on the spot.   How do I do it? Why is $2\pi i \neq 0?$ We know that $e^{\pi i} = -1$ because of de Moivre's formula. ($e^{\pi i} = \cos \pi + i\sin \pi = -1).$  Suppose we square both sides and get $e^{2\pi i} = 1$(which you also get from de Moivre's formula), then shouldn't $2\pi i=0$? What am I missing here? Is "singular noun + and + singular noun" singular or plural? When I type "[singular noun] and [singular noun]" in Word 2010, I find some interesting things.        Bread and butter is essential. (the auto-correction warns me of subject-verb disagreement.)   Bread and butter are essential. (OK)   A knife and fork is on the table. (OK)   A knife and fork are on the table. (OK)   The needle and thread is new. (OK)   The needle and thread are new. (OK)   Cost and revenue is directly linked. (OK)   Cost and revenue are directly linked. (OK)      I wonder how a native speaker would consider this phenomenon. I was running my OS off a USB stick fine and the wifi was working. I installed it to my SSD and setup again but not the WIFI adaptor isn't working.  I followed the first time  and it worked but since installing onto the SSD and doing the same its not working.  No wlan0 interface found Please check drivers, try lsusb to check USB device is present root@goldminer:~# lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 0bda:0811 Realtek Semiconductor Corp.  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub   On the working device  root@coalminer:~# dkms status amdgpu, 18.10-572953, 4.13.16-hiveos, x86_64: installed amdgpu, 18.10-572953, 4.4.0-127-generic, x86_64: installed nvidia, 390.59, 4.13.16-hiveos, x86_64: installed nvidia, 390.59, 4.4.0-127-generic, x86_64: installed rtl8812au, 4.2.2, 4.13.16-hiveos, x86_64: installed rtl8812au, 4.2.2, 4.4.0-127-generic, x86_64: installed   On the SSD  root@goldminer:~# dkms status amdgpu, 18.10-572953, 4.13.16-hiveos, x86_64: installed amdgpu, 18.10-572953, 4.4.0-127-generic, x86_64: installed nvidia, 390.59, 4.13.16-hiveos, x86_64: installed nvidia, 390.59, 4.4.0-127-generic, x86_64: installed rtl8812au, 4.2.2, 4.13.16-hiveos, x86_64: installed (WARNING! Diff between built and installed module!) rtl8812au, 4.3.8.12175.20140902+dfsg: added rtl8812au, 5.2.9: added   Any advise? I think from trying to fix it ive been making it worse. I need to calculate the following determinant in order to prove the following equality:  $$\det\begin{pmatrix} a &amp; b &amp; c &amp; d \\ -b &amp; a &amp; -d &amp; c \\ -c &amp; d &amp; a &amp; -b \\ -d &amp; -c &amp; b &amp; a \end{pmatrix} = (a^2+b^2+c^2+d^2)^2.$$  I tried using Gauss-algorithm to get an easier matrix, but I'm not sure if I did it correctly.  Calling the $4$ lines $I$, $II$, $III$ and $IV$, I did:  (1) $II \cdot a$  (2) $III \cdot a$  (3) $IV \cdot a$  After this I did:  (4) $II' + I \cdot b$  (5) $III' + I \cdot c$  (6) $IV' + I \cdot d$  So finally I got the following matrix:  $$\begin{pmatrix} a &amp; b &amp; c &amp; d \\ 0 &amp; a^2+b^2 &amp; bc-ad &amp; ac+bd \\ 0 &amp; ad+bc &amp; a^2+c^2 &amp; cd-ab \\ 0 &amp; bd-ac &amp; ab-cd &amp; a^2+d^2 \end{pmatrix}.$$  I thought this would make the determinant a bit easier, unfortunately I must have done something wrong. Is multiplication with single lines allowed as I have done it?  Thank you very much. How do I fix a "Unknown configuration key `foreign-architecture' found in your `dpkg' configuration files." error? What and with what was Luthor doing in the ship at the end of the movie? After Doomsday was defeated, a spec-ops team sent to the Kryptionian ship in Metropolis found Luthor submerged in water, in front of a... thing, which "held" three metal cubes. The thing looked up, roars, and dissipates into thin air.    What the hell was that all about? I am really confused. What was that creature and what was Luthor doing with it?