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Can I SSH into a specific directory? How to disable the touchpad? I want my touchpad to be disabled when I use my mouse. How can I do that? touchpad-indicator has stopped working on 11.10. It used to work on 11.04. Gnome3 is not a solution as I don't like it and find it buggy. $R$ is commutative, $I$,$J$ are ideals, $I+J=R$, then $IJ=I\cap J$ If $R$ is a commutative ring and $I$ and $J$ are ideals s.t. $I+J=R$ then show that $IJ=I\cap J$.  I've already shown that $IJ \subset I\cap J$, now I need to show the reverse inclusion.   I'm a bit lost, so far i'm just figuring out what pieces I have to work with.  Such as:  $\forall r\in R$ $\exists i\in I ,j\in J$ s.t. $i+j=r$  $\forall ij\in IJ$, $ij=i_1$ and $ij=j_1$ for some $i_1\in I$, $j_1\in J$.  Also, if I let $x\in I\cap J$, then $x=i_2=j_2=i+j$ for some $i_2\in I$, $j_2\in J$  Anyone, having problem getting to the conclusion here, thanks in advance Transposing rows and columns I have a file with the lines like below.  title1:A1 title2:A2 title3:A3 title4:A4 title5:A5  title1:B1 title2:B2 title3:B3 title4:B4 title5:B5  title1:C1 title2:C2 title3:C3 title4:C4 title5:C5  title1:D1 title2:D2 title3:D3 title4:D4 title5:D5  How can I achieve this?   title1    title2     title3    title4 A1         A2         A3         A4 B1         B2         B3         B4 C1         C2         C3         C4 D1         D2         D3         D4 How to safely replace a not-yet-failed disk in a Linux RAID5 array? From what I understand, midi-chlorian count is a strong indicator of ability in the Force (though there are other factors as well). So it seems like when Anakin loses his arm or Luke loses his hand, their midi-chlorian counts (and thus their Force ability) should slightly diminish.  Is this the case? When to use icons vs. icons with text vs. just text links? Multiple Image in Canvas ItemsControl Is "I am sat" bad English? I believe it is incorrect and instead either the present continuous     I am sitting   or the predicate adjective     I am seated   should be used.  I hear this quite often, however, and ultimately usage overrules formality.  Does anybody know where this originated or how to describe it grammatically? Fixed point, union of $\aleph_0, \aleph_{\aleph_0},\aleph_{\aleph_{\aleph_0}}\dots$ [see Noah's comment on notation] "On/at/for/over the weekend" in American English Some sources say that "at the weekend" is wrong, while other ones say it's correct. Which form is acceptable in American English?        On Saturdays her sister Ann usually comes to stay with Mary on/at/for/over the weekend/s.   What are you going to do at/on/for/over the weekend/s?    We are going to Paris on/at/for/over the weekend/s.   Are you going to stay here for/at/on/over the weekend/s?      Which preposition do American English speakers use — at, on, for, over? Group posts by year, then by month How can you quickly get the complete path to a file for use in terminal? Recovering a accidently deleted file in Ubuntu I'm using ubuntu 9.10 and accidently deleted a specific file within a directory on my system. I checked in the Trash bin and could not locate the file. I deleted it 10mins ago, are there any tools available that I can recovery this file? It's a really important file.  Any help would be highly appreciated  My partition is ext4 How to adjust font features in LuaTeX? As of version 2.7 of luaotfload the support for font feature files (.fea) .  On the  Hans showed how to make font substitution work through Lua.  More examples are available in the latest ConTeXt distribution (, , , , , , )  In the past I have been using font feature files to adjust the kerning of fonts on-the-fly.  From Hans' example it is not clear to me how to adjust kerning in the new syntax.  The below example does not work as intended.  \documentclass{article} \usepackage{fontspec} \directlua{ fonts.handlers.otf.addfeature {     name = "kern",     {         type = "pair",         data = {             [0x0041] = { [0x0056] = { false, { -200, 0, 0, 0 } } },         }     } } } \setmainfont{Latin Modern Roman} \begin{document} AV \end{document}   Can we have a comprehensive guide on how to adjust font features with LuaTeX with the fonts.handlers technique?    Related questions:  (These involve hooking into the luaotfload.patch_font callback) Integer reciprocals in arithmetic progression Let $m_1,m_2,\ldots,m_k$ be $k$ positive integers such that their reciprocals are in AP. Show that $k&lt;m_1+2$. Also find such a sequence.     Whatever way I tried, whichever formula I used, I could not eliminate the $m_k$ term, which I reckon would be the ideal scenario to find the solution. I am exhausted of any further ideas, please help. Thank you. When I ssh into my Ubuntu 18.04 box I get the motd  1 update could not be installed automatically   Which goes on to tell me to check the unattended-upgrades log.  The log shows no problems. How can I clear this bogus message? Change the display scaling on the fly I'm looking for a keyboard shortcut or a CLI instruction to change the display scale on the fly. Seems there's nothing in compiz-config manager to handle this? What does the colon in Tikz coordinates mean? I was looking for a possible duplicated question about  in , then looked using the Big G! since the integrated search didn't give me any useful result (laugs) then I found the , but in Stackoverflow! Then, I proceed to flag as off-topic, but since "It's too old to migrate" I don't have the option to do so...  So, my question is, should I leave it like that? Or the question is better in UL (also on topic, just read the question)? Any guidance to this young pada-wan is greatly appreciated.