Can anyone assist with installing Cowsay?  I've got Ubuntu 14.04 TLS.  I've tried various commands and websites to download it, but get no joy.  I get messages such as: invalid operation.
How can I install applications like Google Chrome on Ubuntu?  Are there any commands to install an application?    Index of answers:
Ubuntu 12.10 "Turn screen off when inactive for: Never" still turns off How can I set up dual monitors with nVidia? How to distinguish Nexus 7 (2012) and Nexus 7 (2013) I am having trouble with Bluetooth Low Energy (BT 4.0) on a Nexus 7.  I think I may have a 2012 model.  How to tell if I have a 2012 or 2013 version of the Nexus 7? Why does Stack Overflow allow duplicate display names? What is the reasoning behind the design decision to allow users to create a display name which matches another existing users exactly?    This is opposed to the common practice of enforcing unique user names, and I'd really like to learn something. Fraleigh(7ed) Theorem33.12. Let $p$ be a prime and let $n\in\mathbb{Z}^+$. If $E$ and $E&#39;$ are fields of order $p^n$, then $E \simeq E&#39;$.   Proof in the text: Both $E$ and $E&#39;$ have $\mathbb{Z}_p$ as prime field, up to isomorphism. By Corollary 33.6(A finite extension $E$ of a finite field $F$ is a simple extension of $F$), $E$ is a simple extension of $\mathbb{Z}_p$ of degree $n$, so there exists an irreducible polynomial $f(x)$ of degree $n$ in $\mathbb{Z}_p[x]$ such that $E\simeq \mathbb{Z}_p[x]/ \langle f(x) \rangle$. Because the elements of $E$ are zeros of $x^{p^n}-x$, *we see that $f(x)$ is a factor of $x^{p^n}-x$ in $\mathbb{Z}_p[x]$*. Because $E&#39;$ also consists of zeros of  $x^{p^n}-x$, we see that $E&#39;$ also contains zeros of irreducible $f(x)$ in $\mathbb{Z}_p[x]$. Thus, because $E&#39;$ also contains exactly $p^n$ elements, $E&#39;$ is also isomorphic to $E\simeq \mathbb{Z}_p[x]/\langle f(x) \rangle$.  I don't know why $f(x)$ divides $x^{p^n}-x$. $E$ has a zero $\alpha$ of $f(x)$, but it doesn't need to have all the zeros of $f(x)$. So $f(x)=(x-\alpha)g(x)$ in $E[x]$ and $g(x)$ need not be splitted into linear factors. How can $f(x)$ divide $x^{p^n}-x$? Making ffmpeg process first audio stream differently than all others I'm trying to write a command such that ffmpeg executes a given instruction for the first audio stream in a file and a different instruction for any and all others.  In the test case below, for example, I want the first stream copied to the output file and all others converted to mono.  If I write it this way  ffmpeg -i INPUT -map 0 -c copy -map 0:a:0 -c:a:0 copy -map -0:a:0? -c:a libfdk_aac -ac 1 OUTPUT   the first audio stream is ignored when the mapping is overridden later in the command line.  But if I move the instruction for that stream to after the others'  ffmpeg -i INPUT -map 0 -c copy -map -0:a:0? -c:a libfdk_aac -ac 1 -map 0:a:0 -c:a:0 copy OUTPUT   it's no longer ignored, but becomes the last audio stream in the file.  I know I'm close here; I just can't see what I'm doing wrong. Conjugate class in the dihedral group Why don't we have a theory of everything? What is currently stopping us from having a theory of everything? i.e. what mathematical barriers, or others, are stopping us from unifying GR and QM? I have read that string theory is a means to unify both, so in this case, is it a lack of evidence stopping us, but is the theory mathematically sound? Is "laic" an alternative word to the word "layperson"? T-Shirt print resolution Why do shadows from the sun join each other when near enough? In this case what is correct?        Keep Tom and I updated.      or         Keep Tom and me updated.      I understand that me is an object pronoun. And therefore I feel the second option is correct.  Especially, because I would say "Keep him updated" and also "Keep me updated". Instead of "Keep he updated" or "Keep I updated". But something about saying "Keep him and me updated" feels wrong.  However I am not sure, because several people have told me that in this case I is the correct option because it is being used in conjunction with a name (Tom) and not a pronoun. Is that correct? Who is bound to the Prime Directive? Midpoint-Convex and Continuous Implies Convex What are Java command line options to set to allow JVM to be remotely debugged? Application of Kirchhoff's laws in circuits with inductors As we know, the  are applicable for conservative electric fields. Now it is applicable for circuits where inductors are present but the field there is not .  So how are the  Kirchhoff's laws  applicable there? Can I cast a spell in the middle of jumping with a Jump spell? I have not completely read the rules for 5e, and my group has played a decent amount of 4e. We recently started 5e.  So my question is, as a Wizard, can I cast the Jump spell on myself one turn, then the next turn jump high into the air and cast Thunderwave straight down? I'm a little unsure of how the actions work in 5e. The point is to hopefully knock a handful of enemies prone to make quick work of them with my group. (We have a house rule from 4e where a successful attack on a prone character is an automatic critical.) How to change Windows 7 date format? Is it possible to configure Windows 7 to use YYYY-MM-DD instead of DD/MM/YYYY as the date format? How? Where? Is it possible to set keyboard shortcuts on a webpage? For example, "dude," "man," "buddy," "pal," etc, when used to stand in for someone's name.  "Hey, pal, how's it going?"  Is there a word for terms like these?  Or is "colloquialism" as close as we can get?