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  • How to set Grub to automatically load Xen kernel

    - by Cerin
    How do you configure Grub to automatically use the Xen kernel under Ubuntu 11.10? No matter what I do, it loads the first menuentry. The only way I can get it to load Xen is to manually select the kernel, which I can't do if I have to reboot the server remotely, or there's a power failure and the machine automatically boots up when power's restored, etc. It's driving me nuts. In my /boot/grub/grub.cfg, the Xen kernel is at index 4 (i.e. it's the 5th menuentry). So I've tried: Setting GRUB_DEFAULT=4, and running sudo update-grub Setting GRUB_DEFAULT=saved and GRUB_SAVEDEFAULT=true, and running sudo update-grub Setting GRUB_DEFAULT="Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-16-server", and running sudo update-grub None of these work. It continues to load the first menuentry, which is "Ubuntu, with Linux 3.0.0-16-server". Below is my current /boot/grub/grub.cfg. What am I doing wrong? # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-16-server" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=2 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 3.0.0-16-server' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod gzio insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac linux /boot/vmlinuz-3.0.0-16-server root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro initrd /boot/initrd.img-3.0.0-16-server } menuentry 'Ubuntu, with Linux 3.0.0-16-server (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Linux 3.0.0-16-server ...' linux /boot/vmlinuz-3.0.0-16-server root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.0.0-16-server } submenu "Previous Linux versions" { menuentry 'Ubuntu, with Linux 3.0.0-12-server' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod gzio insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac linux /boot/vmlinuz-3.0.0-12-server root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro initrd /boot/initrd.img-3.0.0-12-server } menuentry 'Ubuntu, with Linux 3.0.0-12-server (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Linux 3.0.0-12-server ...' linux /boot/vmlinuz-3.0.0-12-server root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.0.0-12-server } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### submenu "Xen 4.1-amd64" { menuentry 'Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-16-server' --class ubuntu --class gnu-linux --class gnu --class os --class xen { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Xen 4.1-amd64 ...' multiboot /boot/xen-4.1-amd64.gz placeholder echo 'Loading Linux 3.0.0-16-server ...' module /boot/vmlinuz-3.0.0-16-server placeholder root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro echo 'Loading initial ramdisk ...' module /boot/initrd.img-3.0.0-16-server } menuentry 'Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-16-server (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os --class xen { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Xen 4.1-amd64 ...' multiboot /boot/xen-4.1-amd64.gz placeholder echo 'Loading Linux 3.0.0-16-server ...' module /boot/vmlinuz-3.0.0-16-server placeholder root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro single echo 'Loading initial ramdisk ...' module /boot/initrd.img-3.0.0-16-server } menuentry 'Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-12-server' --class ubuntu --class gnu-linux --class gnu --class os --class xen { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Xen 4.1-amd64 ...' multiboot /boot/xen-4.1-amd64.gz placeholder echo 'Loading Linux 3.0.0-12-server ...' module /boot/vmlinuz-3.0.0-12-server placeholder root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro echo 'Loading initial ramdisk ...' module /boot/initrd.img-3.0.0-12-server } menuentry 'Ubuntu GNU/Linux, with Xen 4.1-amd64 and Linux 3.0.0-12-server (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os --class xen { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac echo 'Loading Xen 4.1-amd64 ...' multiboot /boot/xen-4.1-amd64.gz placeholder echo 'Loading Linux 3.0.0-12-server ...' module /boot/vmlinuz-3.0.0-12-server placeholder root=UUID=d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac ro single echo 'Loading initial ramdisk ...' module /boot/initrd.img-3.0.0-12-server } } ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod raid insmod mdraid1x insmod part_msdos insmod part_msdos insmod ext2 set root='(mduuid/be73165bc31d6f5cd00d05036c7b964f)' search --no-floppy --fs-uuid --set=root d72bad3f-9ed7-44b9-b3d1-d7af9f62a8ac linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ###

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  • Any algorithm to dedicate a set of known resources to a set of known requirements (scheduling)

    - by Saeed Neamati
    I'm developing an application to help school principals in dedicating teachers to classes and courses over the hours of a week (scheduling). The scenario is roughly something like this: User enters the list of teachers and their free times into the system User enters the list of courses for this semester User enters the list of available classes into the system Well, up to here, there is no big deal. Just simple CRUD operations and nothing extraordinary. However, now what makes this system useful is that the application should automatically and based on an algorithm create the semester scheduling. I think you've got the main idea here. For example application should suggest that teacher A should go to class 1 for mathematics, and at the same time teacher B should go to class 2 for physics. This way all of the classes would be dedicated to lessons and teacher times won't overlap each other. Piece a cake for school principal. However, I can't find a good algorithm for this resource dedication. I mean it seems hard to me. Searching Google resulted in articles from different websites, but they are of no help and use to me. For example: http://en.wikipedia.org/wiki/Resource_allocation or http://en.wikipedia.org/wiki/Scheduling_(production_processes) Is there any algorithm out there, or any application or engine which can help me here? Does this requirements have a known name, like for example time scheduling engine? Any help would be appreciated.

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  • Set Valid IP On Vmware Vm's Help Please

    - by Shahin At
    I Have a VPS.And i on my vps installed vmware workstation version 9.now i have 3 valid ip's: XXX.152.193.66 XXX.152.193.101 XXX.152.193.103 Gateway: XXX.152.193.65 now tow ip's set in host and i want to 1 ip set on vm. network vm is bridge and set ip on vm but this ip from out of internal network not ping and in vm not ping to gateway. What can I do to solve this problem? my ip is unassigned and only set on vm and use bridge network mode.and gw,mask,dns is set.but not ping. i set this ip on host and without problems is worked, But I do not know why on vm not worked. my host OS Is Windows Server 2003 and firewall is off and RRAs(routing and remote access) For VPN service is Enable. Do not host or virtual machines to create a IP route?

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  • Find Month difference in php?

    - by Karthik
    Is there anyway to find the month difference in php? I have the input of from date 2003-10-17 and todate 2004-03-24. I need the results how many month is there within these two days. Say if 6 months, i need the output in months only. Thanks for guide me for day difference. I find the solution through mysql but i need in php. Anyone help me, Thanks in advance.

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  • Difference between arguments in setInterval calls

    - by Martin Janiczek
    What's the difference between these setInterval calls and which ones should be used? setInterval("myFunction()",1000) setInterval("myFunction",1000) setInterval(myFunction(),1000) setInterval(myFunction,1000) My guess is that JS uses eval() on the first two (strings) and calls the latter two directly. Also, I don't understand the difference between the calls with and without parentheses. The ones with parentheses call it directly and then periodically call its return value?

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  • MySQL: difference of two result sets

    - by Zombies
    How can I get the set difference of two result sets? Say I have a result set (just one column in each): result1: 'a' 'b' 'c' result2: 'b' 'c' I want to minus what is in result1 by result2: result1 - result2 such that it equals: difference of result1 - result2: 'a'

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  • Can I configure a visual difference view with the notifications provided by TFS?

    - by John Kaster
    I have TFS sending me alerts whenever someone on my team checks in code. (I had to create notification rules for every project, but that's just a sidebar complaint in this question.) These alerts provided some information on who checked in the files when, and what files have changed, with urls to view details in a browser. The thing that baffles me is that I can't just click on the source file and see a visual diff of the changes. There's no link that will auto-launch a diff in Visual Studio (using a custom protocol) from there either. Is there a way to configure TFS to provide a visual diff of the changes to the file that was checked in via this notification UI?

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  • What difference with Android when iOS is not open?

    - by hqt
    My question may seem silly, but, I've read in many Android books that the better part of Android is Android is open, and iOS is closed. But, from a programmer viewpoint, who cares about this point? Programmers just care about the platform: is it easy to program in, easy to have help in the network, etc. They don't care about whether the platform is open or closed. One book had additional information, but I don't understand it much. Since iOS is not open, I’d be able to share my work with others only if Apple allowed it. So, if you write an app, and need to share, you must have Apple's permission, but not Android's? Please help me understand this point. I'm preparing for a presentation on Android. And I don't know if I should put this point into my presentation.

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  • pixel difference

    - by J J
    i m a beginner in java programming. i have to submit project of server- client and stuck in pixel comparision .acc to code it accepts buffered image and compares pixel how to store pixel difference in 2nd image itself and return it?? do help with code?

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  • FIND TIME DIFFERENCE

    - by RUBAN
    HI, I HAVE THREE COLUMNS. COLUMN A COLUMN B COLUMNC 2.43 2.45 00:02:00 WHAT I WANT IS COLUMN A HAVE START TIME, AND COLUMN B HAVE END TIME.I NEED THE TIME DIFFERENCE OF START AND END TIME IN COLUMN C FORMAT LIKE(HH:MM:SS) SOMEBODY CAN HELP ME PLEASE!!!!!!!!!!!!!

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  • Difference between dates

    - by Ben C
    I want to calculate the difference between two times, one of which is the current time, and the other is just in the format HH:MM, always in the future. If I just subtract $futuretime from $now, it should, of course, be a positive number. This works fine until... If $now is in the afternoon or evening and $futuretime is, say, 7AM next morning, how can I force it to understand the the time is always going to be in the future? (It's for working out the time of something that occurs about every half an hour during working hours, and then stops until the following morning) Thanks in advance!

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  • What is the difference between these codes?

    - by dhaliwaljee
    <input type='text' id='txt' name='txtName' size='20' value='testing'/> <script type="text/javascript" language='javascript'> var val = document.getElementsByName('txtName'); alert(val[0].value); alert(window.txtName.value); </script> In above code we are using alert(val[0].value); alert(window.txtName.value); these two ways for getting value from object. What is the difference between both ways and which way is best.

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  • Go - Using a map for its set properties with user defined types

    - by Seth Hoenig
    I'm trying to use the built-in map type as a set for a type of my own (Point, in this case). The problem is, when I assign a Point to the map, and then later create a new, but equal point and use it as a key, the map behaves as though that key is not in the map. Is this not possible to do? // maptest.go package main import "fmt" func main() { set := make(map[*Point]bool) printSet(set) set[NewPoint(0, 0)] = true printSet(set) set[NewPoint(0, 2)] = true printSet(set) _, ok := set[NewPoint(3, 3)] // not in map if !ok { fmt.Print("correct error code for non existent element\n") } else { fmt.Print("incorrect error code for non existent element\n") } c, ok := set[NewPoint(0, 2)] // another one just like it already in map if ok { fmt.Print("correct error code for existent element\n") // should get this } else { fmt.Print("incorrect error code for existent element\n") // get this } fmt.Printf("c: %t\n", c) } func printSet(stuff map[*Point]bool) { fmt.Print("Set:\n") for k, v := range stuff { fmt.Printf("%s: %t\n", k, v) } } type Point struct { row int col int } func NewPoint(r, c int) *Point { return &Point{r, c} } func (p *Point) String() string { return fmt.Sprintf("{%d, %d}", p.row, p.col) } func (p *Point) Eq(o *Point) bool { return p.row == o.row && p.col == o.col }

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  • VBA - Instead of ActiveExplorer.Selection to set folder, explicitly set folder path

    - by Mike
    Sub MoveItems() Dim Messages As Selection Dim Msg As MailItem Dim NS As NameSpace Set NS = Application.GetNamespace("MAPI") Set Messages = ActiveExplorer.Selection If Messages.Count = 0 Then Exit Sub End If For Each Msg In Messages Msg.Move NS.Folders("Personal Folders").Folders("SavedMail") Next End Sub This code will move all email messages from the currently selected folder in outlook to another folder (SavedMail). I would like to edit the code so that instead of using the currently selected folder as the source for the messages, there would be a hard-coded folder - something like Set Messages = NS.Folders("Personal Folders").Folders("Moved"). I'm a VBA rookie and tried just replacing the Set Messages line with this which resulted in a Run-time error '13': Type mismatch which I think refers to a mismatch of the Dim Messages and the Set Messages commands. I've tried using different Dim definitions with no luck. I'm guessing that someone who knows VBA will see the way to do this right away. Any help would be greatly appreciated. Thanks.

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  • Efficient way of calculating average difference of array elements from array average value

    - by Saysmaster
    Is there a way to calculate the average distance of array elements from array average value, by only "visiting" each array element once? (I search for an algorithm) Example: Array : [ 1 , 5 , 4 , 9 , 6 ] Average : ( 1 + 5 + 4 + 9 + 6 ) / 5 = 5 Distance Array : [|1-5|, |5-5|, |4-5|, |9-5|, |6-5|] = [4 , 0 , 1 , 4 , 1 ] Average Distance : ( 4 + 0 + 1 + 4 + 1 ) / 5 = 2 The simple algorithm needs 2 passes. 1st pass) Reads and accumulates values, then divides the result by array length to calculate average value of array elements. 2nd pass) Reads values, accumulates each one's distance from the previously calculated average value, and then divides the result by array length to find the average distance of the elements from the average value of the array. The two passes are identical. It is the classic algorithm of calculating the average of a set of values. The first one takes as input the elements of the array, the second one the distances of each element from the array's average value. Calculating the average can be modified to not accumulate the values, but caclulating the average "on the fly" as we sequentialy read the elements from the array. The formula is: Compute Running Average of Array's elements ------------------------------------------- RA[i] = E[i] {for i == 1} RA[i] = RA[i-1] - RA[i-1]/i + A[i]/i { for i > 1 } Where A[x] is the array's element at position x, RA[x] is the average of the array's elements between position 1 and x (running average). My question is: Is there a similar algorithm, to calculate "on the fly" (as we read the array's elements), the average distance of the elements from the array's mean value? The problem is that, as we read the array's elements, the final average value of the array is not known. Only the running average is known. So calculating differences from the running average will not yield the correct result. I suppose, if such algorithm exists, it probably should have the "ability" to compensate, in a way, on each new element read for the error calculated as far.

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  • Vim: Call an ex command (set) from function?

    - by sixtyfootersdude
    Drawing a blank on this, and google was not helpful. Want to make a function like this: function JakPaste() let tmp = :set paste? if tmp == "paste" set nopaste else set paste endif endfunction map <F2> :call JakPaste()<CR> However this does not work. I have isolated the broken line: function JakPaste() let tmp = set paste? endfunction map <F2> :call JakPaste()<CR> Pressing F2 results in this error: Error detected while processing function JakPaste: line 1: E121: Undefined variable: set E15: Invalid expression: set paste? Hit ENTER or type command to continue How should I call an ex command (set) from a vim function? This seems somewhat relevant however I still don't get it.

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  • Update Rule in Temporal difference

    - by Betamoo
    The update rule TD(0) Q-Learning: Q(t-1) = (1-alpha) * Q(t-1) + (alpha) * (Reward(t-1) + gamma* Max( Q(t) ) ) Then take either the current best action (to optimize) or a random action (to explorer) Where MaxNextQ is the maximum Q that can be got in the next state... But in TD(1) I think update rule will be: Q(t-2) = (1-alpha) * Q(t-2) + (alpha) * (Reward(t-2) + gamma * Reward(t-1) + gamma * gamma * Max( Q(t) ) ) My question: The term gamma * Reward(t-1) means that I will always take my best action at t-1 .. which I think will prevent exploring.. Can someone give me a hint? Thanks

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