Example for path connected subspace of $\Bbb{R}^2$ that is not locally path connected at any point
Path connected space that is not locally connected
i install ubuntu and followed a guide to put 20gb in '/' and the rest (150gb) in '/home'. Now i just found out that a lot of the things installed in ubuntu usually goes to '/' instead of '/home'. I have a lot more things to install.  So what is the point of '/home' ? How do I fix this ? Should I transfer 150gb from '/home' to / ?  Filesystem      Size  Used Avail Use% Mounted on udev            7.8G     0  7.8G   0% /dev tmpfs           1.6G  9.5M  1.6G   1% /run /dev/sda6        19G   16G  1.8G  91% / tmpfs           7.8G  676K  7.8G   1% /dev/shm tmpfs           5.0M  4.0K  5.0M   1% /run/lock tmpfs           7.8G     0  7.8G   0% /sys/fs/cgroup /dev/sda2        96M   29M   68M  31% /boot/efi /dev/sda8       159G  1.1G  150G   1% /home tmpfs           1.6G   56K  1.6G   1% /run/user/1000   what is /boot ? Its not '/' or '/home' Chat requirement to post images should be made explicit There is (apparently) a 100 reputation requirement to upload and post images through chat.  There isn't any easily located documentation on this, however. 100 global reputation is listed as the privilege for , while the chat FAQ and help both do not mention any restrictions on uploading images.  As such, could somewhere other than  be used to indicate that there is a reputation requirement in chat for uploading images? If a product of relatively prime integers is an $n$th power, then each is an $n$th power If $f(x)$ is differentiable at x, I need to prove that $\lim_{h\to0}\frac{f(x+h)-f(x-h)}{2h}$ exist and is finite.  so if $f(x)$ is differentiable at a $x$, the difference quotient exist for this point, and also $f(x)$ must be continuous at x as well  so that mean that:  $\lim_{h\to0^+}\frac{f(x+h)-f(x)}{h} =  \lim_{h\to0^-}\frac{f(x+h)-f(x)}{h}$  and that: $\lim_{x\to x_0^+}=\lim_{x\to x_0^-}=f(x_0)$  I know I should probably use arithmetic limit laws to prove this but I can't see how what I figured out could help me. any help with that?  Thanks! Not booting from USB or CD (SYSLINUX Message) Converting GeoJSON to Shapefile using ogr2ogr? I have a GeoJson file that I want to convert to ESRI Shapefile using ogr2ogr in FWTools.  I tried using   ogr2ogr -F "ESRI Shapefile" filename.shp geojsonfile.json OGRGeoJSON   I got output      ERROR 6: Can't create fields of type StringList on shapefile layers. ERROR 1: Attempt to write non-polygon (POINT)   geometry to  type shapefile. ERROR 1: Terminating translation   prematurely after failed translation of layer OGRGeoJSON   GeoJSON input we are giving is in standard geojson format.  content of geojson are like  {to share I took only a part from features array }  {"id":1223, "properties":{"name":"3","level":2}, "map_version":11,"type":"FeatureCollection","x_id":1234,"obj_type":"LevelGeometry", "features":[  { "my_area":[131.40093253528894,33.58879853190332,6.515867411008615,3.490549810987222,-0.6237271428108215], "id":1984791, "location":{"type":"Point","coordinates":[131.4009325,33.5887985]}, "properties":{"display_name":"xyz"}, "type":"Feature", "geometry":{"type":"Polygon","coordinates":[[[131.4009508,33.5888314],[131.4008895,33.5887946],[131.4009148,33.5887653],[131.4009761,33.5888020],[131.4009508,33.5888314]]]}, "obj_type":"Geometry" }  ] } Converting Raw HTTP Request into HTTPWebRequest Object Maximum and minimum of of $f(x)=|x-1|+|x-2|+|x-3|$ What kind of mortar should I use to point a fieldstone foundation?  The old mortar is crumbling, and sandy mortar is falling out onto the basement floor.  I plan to remove the crumbling mortar (see ), then point the foundation with new mortar.  But what kind of mortar should I use?    I have had a hard time finding definite answers about fieldstone foundations on the Internet, but I'll include some of what I've found here.  First,  has this to say about fieldstone foundations:     Most fieldstone foundations have, or had at some time, a thin mortar coating on the face of the stone. The purpose of this coating was to assist in holding the stones in place. This thin mortar coating will inevitably flake off from any moisture migration, revealing the surface of the stones. As this coating continues to erode, the mortar between the stones will begin to crumble and the soft, sandy mortar begins to slowly fall out onto the basement floor. It looks like a small pile of sand at the base of the foundation. When this occurs, tuck pointing is needed to refill the voids where the old mortar has fallen out. It's very important that you scrape away or chip away the crumbling mortar (in between the stones) in order to establish a small cavity or key way which can hold the new mortar that is being applied. Never apply new mortar over any old crumbling mortar, as this is a temporary fix and it will only last a couple years. All crumbling mortar must be removed in order for the newly applied surface to bond properly. While upgrading your field-stone foundation, only work on a section at a time. Do not remove the old mortar throughout the entire basement all at once. Complete all removal, tuck pointing and parging one section at a time.       To avoid annual tuck pointing, you should finish the foundation with a complete top coating of mortar. Be sure it is lime based. This top coat does not have to look like a stone artisan's creation: It merely has to serve the purpose of keeping the newly installed mortar in place. It's sort of like applying a frosting to a cake.    seems to suggest that I should be using not straight type-S hydrated lime, but type-S mortar, which consists of one part Portland cement, ¼ to ½ part lime, and an amount of sand equal to 2¼ to 3 times the total volume of cement and lime.  Do I need to analyze the existing mortar to make sure that the new mortar has the same lime content, as ?  Should I expect the new mortar to start crumbling and releasing dust soon, or should it stay solid and dust-free for many years? split file lines based on first field I have file with content like below and want to convert my output like below   Input  1,a,b,c 2,b,c 3,e,f 4,l  Required output  1,a 1,b 1,c 2,b 2,c 3,e 3,f 4,l    Values on first field is unique and no duplicate lines for 1st field in the input.  I am new to scripting and not sure how can we do this. "Can not setup lock file:/tmp/g2ipmsg.lock errno : -11 (Resource temporarily unavailable)" I installed IP Messenger (GNOME 2) from Ubuntu software center but its not working. It's always showing an error message on Ubuntu 12.04.  FileName:ipmsg.c Function:create_lock_file Line:157 Can not setup lock file:/tmp/g2ipmsg.lock errno : -11 (Resource temporarily unavailable) Right click not working on Ubuntu 18.04 I have installed Ubuntu 18.04 LTS on my HP Pavilion series laptop. After installing this version of Ubuntu, right click is not working of my touchpad. How can I solve this?  BTW:  does not have any solution which which is working for me. PS:- Problem remains after selection area in gnome-tweak-tool Determine $4$ specific digits in $34!$ I am using the Service Console in Lightning Experience, and using the Chatter Feed component on the Case layout to display updates to the Case.  If I use the "Log a Call" Quick Action from the Chatter publisher, these calls are displayed in the Chatter feed.  This is the desired behaviour.  However, if I insert a Log a Call record related to the Case any other way - e.g. using the Developer Console, or my CTI system's custom components - the call does not display in the feed.  If I query the record, it looks exactly the same as the record that is created with the Quick Action.  It just seems that the Chatter post is never made in this situation.  I have checked my Feed Tracking settings:   Task has Enable Feed Tracking and Subject checked Case has All Related Objects checked   How can I enable calls created with a custom component (part of a CTI system) to display in the case feed? Why am I asked for a credit card number to download a free app? I  want to download free app in my iPod touch device and i have the following doubts.  Kindly resolve me doubts.   when i try to download it asks my credit card security number. since i am trying to download free app , why do i need to provide my credit card security code? Will i be debited for downloading the free app from app store?   I cant able to find any information regarding this on apple.  Please provide me some references about this from apple and please resolve my doubts.  Thanks a lot. Unable to uninstall Universal Apps through PowerShell Formation of supermassive black holes Scientists have found very bright source of light which they call  and the are found to be . So these black holes are so massive that they cannot be formed by a supernova. So how are these formed? Creating a link using an 18 character ID I have an 18 character SFDC ID. I was under the impression that I should be able to create a link to that record using the following pattern: https://&lt;org server&gt;.salesforce.com/&lt;id&gt;  For example: https://na12.salesforce.com/00TU000000Nf5NP  That link works fine for me. However, when I try to link to the same object using the 18 character, case insensitive ID (ex. https://na12.salesforce.com/00tu000000nf5npmaz), I get the following error:     Insufficient Privileges      You do not have the level of access necessary to perform the operation   you requested. Please contact the owner of the record or your   administrator if access is necessary.   What exactly is the problem? If all I have is the 18 character ID, how can I create a link back to the correct SalesForce record? See these three pages:          All three of them say:     Earned at least X total score for at least 20 answers in the  tag.   This same text also appears on the tooltip for the tag badge:   Also note the double colon after 'gold badge'  As well as on these pages:          But the  clearly states:        Bronze Badge:  You must have a total score of 100 in at least 20 non-community wiki answers to achieve this badge.   Silver Badge: You must have a total score of 400 in at least 80 non-community wiki answers to achieve this badge.   Gold Badge: You must have a total score of 1000 in at least 200 non-community wiki answers to achieve this badge.        Edit:  It has been noted in the comments that other users see different numbers in these pages, but in all cases it appears they see the same number of answers are required for all tag badge description, regardless of the badge's type. I am currently writing an academic text and need to directly quote/cite text from a paper. What is best practice when I need to add a remark/note to the quote?  For instance, I would do it like this: The authors claim that "we do the best work ever in the area of CS (note: Computer Science)".  So in the above case the actually quoted text is "we do the best work ever in the area of CS", however, I want to add a note which explains the abbreviation "CS".  How should this be done?  Related questions: