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  • How do I easily repair a single unreadable block on a Linux disk?

    - by Nelson
    My Linux system has started throwing SMART errors in the syslog. I tracked it down and believe the problem is a single block on the disk. How do I go about easily getting the disk to reallocate that one block? I'd like to know what file got destroyed in the process. (I'm aware that if one block fails on a disk others are likely to follow; I have a good ongoing backup and just want to try to keep this disk working.) Searching the web leads to the Bad block HOWTO, which describes a manual process on an unmounted disk. It seems complicated and error-prone. Is there a tool to automate this process in Linux? My only other option is the manufacturer's diagnostic tool, but I presume that'll clobber the bad block without any reporting on what got destroyed. Worst case, it might be filesystem metadata. The disk in question is the primary system partition. Using ext3fs and LVM. Here's the error log from syslog and the relevant bit from smartctl. smartd[5226]: Device: /dev/hda, 1 Currently unreadable (pending) sectors Error 1 occurred at disk power-on lifetime: 17449 hours (727 days + 1 hours) ... Error: UNC at LBA = 0x00d39eee = 13868782 There's a full smartctl dump on pastebin.

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  • What is a quick way to indent a block of text with spaces for use within a web browser?

    - by ændrük
    I occasionally have the need to indent a block of text with spaces for use within a web browser, for example, when formatting a code block on this site or in a post on Launchpad. So far I've just done it by hand by copying four spaces to the clipboard and then mashing keys really fast: ?, Home, Ctrl+V (repeat) What is a quicker way to accomplish this, e.g. copying and pasting to another program? a Firefox or Chrome browser extension? a command to directly modify the clipboard contents? an auto-typing program?

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  • Game actions that take multiple frames to complete

    - by CantTetris
    I've never really done much game programming before, pretty straightforward question. Imagine I'm building a Tetris game, with the main loop looking something like this. for every frame handle input if it's time to make the current block move down a row if we can move the block move the block else remove all complete rows move rows down so there are no gaps if we can spawn a new block spawn a new current block else game over Everything in the game so far happens instantly - things are spawned instantly, rows are removed instantly etc. But what if I don't want things to happen instantly (i.e animate things)? for every frame handle input if it's time to make the current block move down a row if we can move the block move the block else ?? animate complete rows disappearing (somehow, wait over multiple frames until the animation is done) ?? animate rows moving downwards (and again, wait over multiple frames) if we can spawn a new block spawn a new current block else game over In my Pong clone this wasn't an issue, as every frame I was just moving the ball and checking for collisions. How can I wrap my head around this issue? Surely most games involves some action that takes more than a frame, and other things halt until the action is done.

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  • Should I block bots from my site and why?

    - by Frank E
    My logs are full of bot visitors, often from Eastern Europe and China. The bots are identified as Ahrefs, Seznam, LSSRocketCrawler, Yandex, Sogou and so on. Should I block these bots from my site and why? Which ones have a legitimate purpose in increasing traffic to my site? Many of them are SEO. I have to say I see less traffic if anything since the bots have arrived in large numbers. It would not be too hard to block these since they all admit in their User Agent that they are bots.

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  • Is it safe to block redirected (but still linked) URLs with robots.txt?

    - by Edgar Quintero
    I have a website that has all URLs optimized and 301 redirected from nasty URLs to clean ones. However, everywhere throughout the site the unclean URLs are linked in menus, content, products, etc. Google currently has all clean URLs indexed, along with a few unclean URLs too. So the site still has linked everywhere the old URLs (ideally this wouldn't be the case but this is how it is ATM). I would like to block the unclean URLs with robots.txt. The question: if I block these unclean URLs with the robots.txt, when the entire website is linked with them (but they all redirect to the clean version), will this affect the indexing status at all?

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  • DVD RW+ Not showing up

    - by Manywa R.
    I'm running Ubuntu 12.10 on a Toshiba Satellite Pro A120 and my built in DVD Drive is not opening any cd/dvd/dvd rw that am trying to play on them. the drive seems to be mounted and recongnized: Output of sudo lshw: ... *-cdrom description: DVD-RAM writer product: DVD-RAM UJ-841S vendor: MATSHITA physical id: 1 bus info: scsi@1:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/dvdrw logical name: /dev/sr0 version: 1.40 capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram configuration: ansiversion=5 status=ready *-medium physical id: 0 logical name: /dev/cdrom and the disk seems to start but hang with the dvd drive LED solid amber.... the output of jun@jun-Satellite-Pro-A120:~$ dmesg | grep "sr0" [679396.184901] sr 1:0:0:0: [sr0] Unhandled sense code [679396.184910] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [679396.184920] sr 1:0:0:0: [sr0] Sense Key : Hardware Error [current] [679396.184931] sr 1:0:0:0: [sr0] Add. Sense: Id CRC or ECC error [679396.184942] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00 [679396.184965] end_request: I/O error, dev sr0, sector 0 [679396.184975] Buffer I/O error on device sr0, logical block 0 [679396.184984] Buffer I/O error on device sr0, logical block 1 [679396.184990] Buffer I/O error on device sr0, logical block 2 [679396.184996] Buffer I/O error on device sr0, logical block 3 [679396.185002] Buffer I/O error on device sr0, logical block 4 [679396.185008] Buffer I/O error on device sr0, logical block 5 [679396.185014] Buffer I/O error on device sr0, logical block 6 [679396.185020] Buffer I/O error on device sr0, logical block 7 [679396.185031] Buffer I/O error on device sr0, logical block 8 [679396.185038] Buffer I/O error on device sr0, logical block 9 [679396.185070] sr 1:0:0:0: [sr0] unaligned transfer [679396.185108] sr 1:0:0:0: [sr0] unaligned transfer Can someone help me through this? tired of moving around with an external dvd drive. Thanks

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  • Having to check collisions twice per game tic

    - by user22241
    I have vertically moving elevators (3 solid tiles wide) and static solid tiles. Each are separate entities and therefore have their own respective collision routines (to check for, and resolve, collisions with the main character) I check my vertical collisions after characters vertical movements and then horizontal collisions after horizontal movements. The problem is that I want my platform to kill the player if it squashes him from the top, and also if he's on a moving platform (that is moving up) that squashes him into a solid block. Correct behaviour, player on solid blocks being squashed from above by decending elevator Here is what happens. Gravity pushes character into solid block, solid block collision routine corrects characters position and sits him on the solid block which pushes him into the moving elevator, elevator routine then checks for collision and kills player. This assumes I am checking solid blocks first, then elevator collisions. However, if it's the other way around, this happens.... Incorrect behaviour, player on accending elevator gets pushed into solid blocks above Player is on an elevator moving up, gravity pushes him into the elevator, solid block CD routine detects no collision, no action taken. Elevator CD routine detects character has been pushed into elevator by gravity, corrects this by moving character up and sitting him on the elevator and pushes him into the solid blocks above, however the solid block vertical routine has now already run for this tic, so the game continues and the next solid block collision that is encountered is the horizontal routine. This detects a collision and moves the character out of the collision to the left or right of the block which looks odd to say the least (character should get killed here). The only way I've managed to get this working correctly is by running the solid block CD, then the elevator CD, then the solid block CD again straight after. This is clearly wasteful but I can't figure out how else to do this. Any help would be appreciated.

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  • Is there a command-line utility app which can locate a specific block of lines in a text file?

    - by fred.bear
    The text "search and replace" utility programs I've seen, seem to only search on a line-by-line basis... Is there a command-line tool which can locate one block of lines (in a text file), and replace it with another block of lines.? For example: Does the test file file contain this exact group of lines: 'Twas brillig, and the slithy toves Did gyre and gimble in the wabe: All mimsy were the borogoves, And the mome raths outgrabe. 'Beware the Jabberwock, my son! The jaws that bite, the claws that catch! Beware the Jubjub bird, and shun The frumious Bandersnatch!' I want this, so that I can replace multiple lines of text in a file and know I'm not overwriting the wrong lines. I would never replace "The Jabberwocky" (Lewis Carroll), but it makes a novel example :)

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  • Is it safe to Block These URLs with Robots.txt?

    - by Edgar Quintero
    I have a website that has all URLs optimized and 301 redirected from nasty URLs to clean ones. However, everywhere throughout the site the unclean URLs are linked in menus, content, products, etc. Google currently has all clean URLs indexed, along with a few unclean URLs too. So the site still has linked everywhere the old URLs (ideally this wouldn't be the case but this is how it is ATM). I would like to block the unclean URLs with robots.txt. The question: If I block these unclean URLs with the robots.txt, when the entire website is linked with them (but they all redirect to the clean version), will this affect the indexing status at all?

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  • How I can view and block specific applications temporarily from accessing Internet?

    - by Curious Apprentice
    I don't want to block any application permanently from accessing internet. I just want to block some specific applications for a particular time period to gain speed in running some other. I know about one such great tool - that is "Comodo firewall". It can smoothly block and accurately display apps accessing internet. The only problem of installing this is, Windows recommends only one firewall apps and as Im running Windows 7 x64 Ultimate there will be complications if I install this one. I need a tool which can accurately display which apps are accessing internet (through which port) and how much data they are receiving or sending. I also need some arrangement within the app so that I can easily temporarily block that app from accessing internet.

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  • is <p> a block-level or inline-level element?

    - by Andor
    hi there, i got a question when i come across the HTML 4.01 DTD: in the strict DTD, a element is defined as <!ELEMENT P - O (%inline;)* -- paragraph --> but somewhat i thought is a block-level, and all(maybe almost) user agents define as a block-level. so, i just wondering, is a block-level or inline-level element. thx.

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  • Will Django user permissions work for models with inline tabular forms of other models?

    - by stinkypyper
    I am setting up DJango admin to make a model editable. On the same page I have tabular inline of a child model. Everything works as expected. Now I want to restrict permission on the tabular inline child form. Specifically remove update and delete permissions on it. I have tried removing the permissions for the admin user using the 'user permissions' of that user. However, it does not work. Does DJango respect the user permissions in regards to inline model forms?

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  • jQuery after show() assumes that display:inline is :hidden. Why?

    - by Janis Veinbergs
    With jQuery 1.4.2, :hidden filter is not filtering out elements that were hidden, but i've made then visible by calling show(). Filter assumes it is still hidden. Is this bug or am i missing something? Consider the following code: $("td.ms-authoringcontrols > span[id*='_ParallelApprovers']:hidden:first").css("display") "none" $("td.ms-authoringcontrols > span[id*='_ParallelApprovers']:hidden:first").show() Object $("td.ms-authoringcontrols > span[id*='_ParallelApprovers']:hidden:first").css("display") "inline" // ?? Let me scratch my head... $("td.ms-authoringcontrols > span[id*='_ParallelApprovers']:hidden:first").is(":hidden") true //element with "display:inline", visible in browser, but yet it is hidden Instead of "inline", you would expect "none", because :hidden filter was used. What it does is from an array of objects it selects first hidden element. Each time i call these lines of code, i expect them to select next hidden element (not the one i just showed).

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  • kelvinluck jQuery datePicker: 2 inline calendars - i need to set EndDate of 2nd on selecting 1st cal

    - by lance
    Hi all I'm stuck. Tried all the angles but i cant seem to get it working. I have 2 inline calendars. When i select a date from the dtFrm calendar it sets the date on the dtTo calendar as expected. I just cant seem to set the EndDate of the dtTo calendar. Anyone manage to solve this one? Thanks! Lance using:jquery.datePicker.min-2.1.2.js <script type="text/javascript"> $(function() { $('.dtFrm').datePicker({ inline: true }) .bind( 'dateSelected', function(e, selectedDate, $td) { $('.dtTo').dpSetSelected(selectedDate.addDays(10).asString());//works $('.dtTo').dpSetEndDate(selectedDate.addDays(11).asString());//doesnt work } ); $('.dtTo').datePicker({ inline: true }); }); </script> <div class="dtFrm" style="float:left"></div> <div class="dtTo" style="float:left"></div>

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  • How to use java.Set

    - by owca
    I'm trying to make it working for quite some time,but just can't seem to get it. I have object Tower built of Block's. I've already made it working using arrays, but I wanted to learn Set's. I'd like to get similar functionality to this: public class Tower { public Tower(){ } public Tower add(Block k1){ //(...) //if block already in tower, return "Block already in tower" } public Tower delete(Block k1){ //(...) //if block already dleted, show "No such block in tower" } } Someone gave me some code, but I constantly get errors when trying to use it : Set<Block> tower = new HashSet<Block>(); boolean added = tower.add( k1 ); if( added ) { System.out.println("Added 1 block."); } else { System.out.println("Tower already contains this block."); } How to implement it ?

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  • How to use separat block caches for secure and unsecure shop access in Magento?

    - by Uwe Mesecke
    I use the Magento block cache for the top navigation block. The problem is the block has to generate some urls for files in the skin directory that cannot be put into css files as the file names depend on category model data. Now when I open magento using a secure connection (https://) the navigation block is fetched from the cache and is sent to the browser but with the http:// urls resulting in a warning in most browsers about unsecure elements on the page. I'd like the have separat caches for secure and unsecure connections. The navigation block extends the class Mage_Catalog_Block_Navigation and therefore has the following cache configuration: $this->addData(array( 'cache_lifetime' => false, 'cache_tags' => array(Mage_Catalog_Model_Category::CACHE_TAG, Mage_Core_Model_Store_Group::CACHE_TAG), ));

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  • trying to figure out how to bridge two virtual networks together and in turn bridge that to the internet for a virtual inline IDS/IPS system

    - by Tony robinson
    I'm trying to figure out how to bridge two vmware (server or workstation, workstation) or virtualbox networks together with a linux IDS/IPS system transparently inline between both the virtual networks. How do I accomplish this? I understand how to bridge to virtual networks together, but how to I make the linux virtual machine sit between them and force traffic to go across the transparent bridge? I would like to have something along the lines of: vmnet a various vms host-only network ---- inline linux box vmnet a boxes forced to go through here to get to the internet --- vmnet b network with internet access configured as either NAT or bridged -- internet I know that basically the linux box needs two virtual nics, one on vmnet a and vmnet b, but other than that, I don't know how to force all the traffic to go across the "transparent" bridging linux box on its way to the internet. Do vmnet a and b have to be the same ip network with the same default route? does vmnet a not have a default route and vmnet b have a default route? I've read in vmware forums that on the linux host you need to change permissions on the vmnet files for promiscuous mode? is this true? how do you configure this scenario on a windows box?

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  • Essbase BSO Data Fragmentation

    - by Ann Donahue
    Essbase BSO Data Fragmentation Data fragmentation naturally occurs in Essbase Block Storage (BSO) databases where there are a lot of end user data updates, incremental data loads, many lock and send, and/or many calculations executed.  If an Essbase database starts to experience performance slow-downs, this is an indication that there may be too much fragmentation.  See Chapter 54 Improving Essbase Performance in the Essbase DBA Guide for more details on measuring and eliminating fragmentation: http://docs.oracle.com/cd/E17236_01/epm.1112/esb_dbag/daprcset.html Fragmentation is likely to occur in the following situations: Read/write databases that users are constantly updating data Databases that execute calculations around the clock Databases that frequently update and recalculate dense members Data loads that are poorly designed Databases that contain a significant number of Dynamic Calc and Store members Databases that use an isolation level of uncommitted access with commit block set to zero There are two types of data block fragmentation Free space tracking, which is measured using the Average Fragmentation Quotient statistic. Block order on disk, which is measured using the Average Cluster Ratio statistic. Average Fragmentation Quotient The Average Fragmentation Quotient ratio measures free space in a given database.  As you update and calculate data, empty spaces occur when a block can no longer fit in its original space and will either append at the end of the file or fit in another empty space that is large enough.  These empty spaces take up space in the .PAG files.  The higher the number the more empty spaces you have, therefore, the bigger the .PAG file and the longer it takes to traverse through the .PAG file to get to a particular record.  An Average Fragmentation Quotient value of 3.174765 means the database is 3% fragmented with free space. Average Cluster Ratio Average Cluster Ratio describes the order the blocks actually exist in the database. An Average Cluster Ratio number of 1 means all the blocks are ordered in the correct sequence in the order of the Outline.  As you load data and calculate data blocks, the sequence can start to be out of order.  This is because when you write to a block it may not be able to place back in the exact same spot in the database that it existed before.  The lower this number the more out of order it becomes and the more it affects performance.  An Average Cluster Ratio value of 1 means no fragmentation.  Any value lower than 1 i.e. 0.01032828 means the data blocks are getting further out of order from the outline order. Eliminating Data Block Fragmentation Both types of data block fragmentation can be removed by doing a dense restructure or export/clear/import of the data.  There are two types of dense restructure: 1. Implicit Restructures Implicit dense restructure happens when outline changes are done using EAS Outline Editor or Dimension Build. Essbase restructures create new .PAG files restructuring the data blocks in the .PAG files. When Essbase restructures the data blocks, it regenerates the index automatically so that index entries point to the new data blocks. Empty blocks are NOT removed with implicit restructures. 2. Explicit Restructures Explicit dense restructure happens when a manual initiation of the database restructure is executed. An explicit dense restructure is a full restructure which comprises of a dense restructure as outlined above plus the removal of empty blocks Empty Blocks vs. Fragmentation The existence of empty blocks is not considered fragmentation.  Empty blocks can be created through calc scripts or formulas.  An empty block will add to an existing database block count and will be included in the block counts of the database properties.  There are no statistics for empty blocks.  The only way to determine if empty blocks exist in an Essbase database is to record your current block count, export the entire database, clear the database then import the exported data.  If the block count decreased, the difference is the number of empty blocks that had existed in the database.

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  • Using pre-made patch cables on a punch down block?

    - by Trevor Harrison
    I need to add a 24 port switch to my wiring closet. In the (distant) past, I usually just punched each port of the switch to a 110 block on the wall (using hand-made cables), and cross connect between that and the 110 block that has the runs to each workstation. To save time, I'm thinking of buying 12 pre-made drop cables, cutting them in half (so 24 single ended cables), and punching those to my 110 block. The things I'm worried about are wire type (ie. solid vs. strands) and color scheme. I really don't know if they use different wire types (still?), but I remember that being an issue at one point. Can anyone comment on this? (I definitely won't feel comfortable trying to punch stranded wiring on my 110 block) Also, picking up a random pre-built cable I had laying around, I noticed that the color scheme used didn't appear to be T568B, but T568A, which would clash with the rest of my wall. Anyone know of an online source that specifies these things? I've looked at www.cablesforless.com (which does have nicer prices) and www.cablestogo.com (which seem stupid expensive) so far. Cables For Less doesn't specify wiring scheme, Cables To Go does specify T568B. Both seem to specify stranded wires instead of solid.

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