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  • Non-relational database modeling tool?

    - by Angel Escobedo
    Hey guys, please recommend some tools you have used succesfully on DW, DataMart, BI an non-relational modeling. Example for automatic creation of snow-flake Schemas, dimensions and facts tables. Wich tools makes you sense familiarity with the diagrams and surrogates keys and it will have the option for export or connect to SQL Server 2008. Thanks

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  • Sed non greedy curly braces match

    - by Cesar
    I have a string in a file a.txt {moslate}alho{/moslate}otra{moslate}a{/moslate} a need to get the string otra using sed. With this regex sed 's|{moslate}.*{/moslate}||g' a.txt a get no output at all but when i add a ? to the regex s|{moslate}.*?{/moslate}||g a.txt (I've read somewhere that it makes the regex non-greedy) i get no match at all, i mean a get the following output {moslate}alho{/moslate}otra{moslate}a{/moslate} How can i get the required output using sed?

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  • Calling a non-exported function in a DLL

    - by Nilbert
    I have a program which loads DLLs and I need to call one of the non-exported functions it contains. Is there any way I can do this, via searching in a debugger or otherwise? Before anyone asks, yes I have the prototypes and stuff for the functions.

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  • How do you portray to non programmers what programming involves?

    - by JD Isaacks
    I get casually asked a lot to take a couple days to teach someone how to program. Most people really think they can learn what I know in a few days. When I tell them I have been doing this for many years and I can't teach them to be a programmer in a few days, they look at me like I am being a jerk and just don't want to help them. I think this is because when I say I am a programmer, or I programmed this. I truly think most people do not realize that I mean I wrote the code that makes it up. I think that they think I mean I configured it, like when you say, "I programmed my VCR." Does anyone else think this? Whats your experience?

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  • How can I give a basic idea of what I'm working on to a non programmer?

    - by Jesse
    As a relatively new programmer (1 year professionally, many years as an amateur) I've run into many situations that sent me running to Stack Overflow for answers that failed my meagre experiences. Tonight I received the hardest question ever. My wife asked me: What are you working on? The questions is deceptive in it's simplicity. A straight forward and truthful answer of "I'm working on a c# class module for monitoring database delivery times" is sure incite suggestion of attempts to confuse. My second instinct was to suggest that it couldn't really be explained to a layperson, after very brief consideration I came to the conclusion that this would likely result in a long and sleepless night on the sofa. The end result was a muddled answer along the lines of "something to monitor automatic things to make sure they're delivered on time". The reception was fairly chilly, I had to make many assurances that I was not insulting her ample intelligence. My question is thus, what is the best way to discuss your work as a programmer with your significant other who is not.

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  • linux automatic change permissions in resolv.file

    - by rikr
    In various linux servers I see how the permissions of the /etc/resolv.conf file change automatically. In state normal: -r--r--r-- 1 root root 103 Jul 4 11:50 resolv.conf In changed state: -r--r----- 1 root root 103 Jul 4 11:50 resolv.conf I installed auditd for monitoring it, and these are the two entries between the change: type=PATH msg=audit(07/04/2012 12:20:02.719:303) : item=0 name=/etc/resolv.conf inode=137102 dev=fe:00 mode=file,644 ouid=root ogid=root rdev=00:00 type=CWD msg=audit(07/04/2012 12:20:02.719:303) : cwd=/ type=SYSCALL msg=audit(07/04/2012 12:20:02.719:303) : arch=x86_64 syscall=open success=yes exit=3 a0=7feeb1405dec a1=0 a2=1b6 a3=0 items=1 ppid=1585 pid=3445 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=4294967295 comm=hostid exe=/usr/bin/hostid key=(null) type=PATH msg=audit(07/04/2012 12:50:03.727:304) : item=0 name=/etc/resolv.conf inode=137102 dev=fe:00 mode=file,440 ouid=root ogid=root rdev=00:00 type=CWD msg=audit(07/04/2012 12:50:03.727:304) : cwd=/ type=SYSCALL msg=audit(07/04/2012 12:50:03.727:304) : arch=x86_64 syscall=open success=yes exit=3 a0=7f2bcf7abdec a1=0 a2=1b6 a3=0 items=1 ppid=1585 pid=3610 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=4294967295 comm=hostid exe=/usr/bin/hostid key=(null) any ideas?

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  • Ubuntu, User Accounts messed up

    - by Vor
    I need to fix Ubuntu Accounts some how but don't really see how it could be done. The problem is: files /etc/passwd and /etc/hostname and /etc/hosts where changed. /etc/passwd After John:x:1000:1000:John,,,:/home/serg:/bin/bash Befoure serg:x:1000:1000:John,,,:/home/serg:/bin/bash /etc/hosts After 127.0.0.1 localhost 127.0.1.1 John-The-Rippe Befoure 127.0.0.1 localhost 127.0.1.1 serg-Protege /etc/hostname After John-The-Ripper Befoure serg-PORTEGE-Z835 I was trying to simply changed this files but can not do this because permission denied. When I'm trying to login as a root I got this message: John@John-The-Ripper:~$ sudo -s [sudo] password for John: John is not in the sudoers file. This incident will be reported The file sudoers is empty: John@John-The-Ripper:~$ vi /etc/sudoers When I type users in cp: John@John-The-Ripper:~$ users John John When I type id, I got this: John@John-The-Ripper:~$ id uid=1000(John) gid=1000(serg) groups=1000(serg) This doesn't work eather: John@John-The-Ripper:~$ usermod -l John serg usermod: user 'serg' does not exist John@John-The-Ripper:~$ adduser serg adduser: Only root may add a user or group to the system. ater. Then I tried to go to the GRUB menu and from there log in as a root. I did this, but however When I tryed to create user serg, It gave me an error that group already exist. When I tried to change /etc/passwd it said 'permission denied' And this doens't do the trick: John@John-The-Ripper:~$ visudo visudo: /etc/sudoers: Permission denied visudo: /etc/sudoers: Permission denied Also The last thing I tried to do is to create a bootable USB and reinstall ubuntu, however I can not open USB-Creator because it asked me a root passwd. But it doesn't work. HELP ME PLEASE =)))

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  • Non modal "status" form

    - by David Jenings
    At the beginning of a section of C# code that could take several seconds to complete, I'd like to display a non modal form with a label that just says, "Please wait..." WaitForm myWaitForm = null; try { // if conditions suggest process will take awhile myWaitForm = new WaitForm(); myWaitForm.Show(); // do stuff } finally { if (myWaitForm != null) { myWaitForm.Hide(); myWaitForm.Dispose(); myWaitForm = null; } } The problem: the WaitForm doesn't completely display before the rest of the code ties up the thread. So I only see the frame of the form. In Delphi (my old stomping ground) I would call Application.ProcessMessages after the Show() Is there an equivalent in C#? Is there a canned "status" form that I can use in situations like this? Is there a better way to approach this? Thanks in advance. David Jennings

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  • How to get rid of grub menu after boot?

    - by umpirsky
    Here is my /etc/default/grub: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_LINUX_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" I tried various things including: How do I hide the GRUB menu showing up in the beginning of boot? How to disable Grub's menu from showing up after failed boot http://www.itworld.com/software/306238/disable-grub-boot-menu-ubuntu-1210 But I still get grub menu each time I boot. My generated /boot/grub/grub.cfg: # # 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 $prefix/grubenv ]; then set have_grubenv=true load_env fi if [ "${next_entry}" ] ; then set default="${next_entry}" set next_entry= save_env next_entry set boot_once=true else set default="0" fi if [ x"${feature_menuentry_id}" = xy ]; then menuentry_id_option="--id" else menuentry_id_option="" fi export menuentry_id_option 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 { if [ x$feature_all_video_module = xy ]; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fi } if [ x$feature_default_font_path = xy ] ; then font=unicode else insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi font="/usr/share/grub/unicode.pf2" fi if loadfont $font ; then set gfxmode=auto load_video insmod gfxterm set locale_dir=$prefix/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ] ; then set timeout=-1 else if [ x$feature_timeout_style = xy ] ; then set timeout_style=hidden set timeout=0 # Fallback hidden-timeout code in case the timeout_style feature is # unavailable. elif sleep --interruptible 0 ; then set timeout=0 fi 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 45,51,53; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="${1}" if [ "${1}" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } 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 menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-ed6b32bc-ec1d-444c-a000-282fddd6d460' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-29-generic } submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-ed6b32bc-ec1d-444c-a000-282fddd6d460' { menuentry 'Ubuntu, with Linux 3.13.0-29-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-29-generic-advanced-ed6b32bc-ec1d-444c-a000-282fddd6d460' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi echo 'Loading Linux 3.13.0-29-generic ...' linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro quiet splash $vt_handoff echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.13.0-29-generic } menuentry 'Ubuntu, with Linux 3.13.0-29-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-29-generic-recovery-ed6b32bc-ec1d-444c-a000-282fddd6d460' { recordfail load_video insmod gzio insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi echo 'Loading Linux 3.13.0-29-generic ...' linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.13.0-29-generic } menuentry 'Ubuntu, with Linux 3.13.0-24-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-24-generic-advanced-ed6b32bc-ec1d-444c-a000-282fddd6d460' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi echo 'Loading Linux 3.13.0-24-generic ...' linux /boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro quiet splash $vt_handoff echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.13.0-24-generic } menuentry 'Ubuntu, with Linux 3.13.0-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-24-generic-recovery-ed6b32bc-ec1d-444c-a000-282fddd6d460' { recordfail load_video insmod gzio insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi echo 'Loading Linux 3.13.0-24-generic ...' linux /boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.13.0-24-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry 'Ubuntu 14.04 LTS (14.04) (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro splash quiet quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-29-generic } submenu 'Advanced options for Ubuntu 14.04 LTS (14.04) (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' $menuentry_id_option 'osprober-gnulinux-advanced-ed6b32bc-ec1d-444c-a000-282fddd6d460' { menuentry 'Ubuntu (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.13.0-29-generic.efi.signed--ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro splash quiet quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-29-generic } menuentry 'Ubuntu, with Linux 3.13.0-29-generic (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.13.0-29-generic.efi.signed--ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro splash quiet quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-29-generic } menuentry 'Ubuntu, with Linux 3.13.0-29-generic (recovery mode) (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.13.0-29-generic.efi.signed-root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset splash quiet-ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset splash quiet initrd /boot/initrd.img-3.13.0-29-generic } menuentry 'Ubuntu, with Linux 3.13.0-24-generic (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.13.0-24-generic.efi.signed--ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro splash quiet quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-24-generic } menuentry 'Ubuntu, with Linux 3.13.0-24-generic (recovery mode) (on /dev/mapper/isw_beaaegcdjh_ASUS_OS2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.13.0-24-generic.efi.signed-root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset splash quiet-ed6b32bc-ec1d-444c-a000-282fddd6d460' { insmod part_gpt insmod ext2 if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 else search --no-floppy --fs-uuid --set=root ed6b32bc-ec1d-444c-a000-282fddd6d460 fi linux /boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=ed6b32bc-ec1d-444c-a000-282fddd6d460 ro recovery nomodeset splash quiet initrd /boot/initrd.img-3.13.0-24-generic } } set timeout_style=menu if [ "${timeout}" = 0 ]; then set timeout=10 fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/30_uefi-firmware ### menuentry 'System setup' $menuentry_id_option 'uefi-firmware' { fwsetup } ### END /etc/grub.d/30_uefi-firmware ### ### 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 ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ###

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  • InvalidAttributeValueException when using non-ascii characters in JNDI

    - by matdan
    Hi, I have some trouble using JNDI since it accepts only 7-bits encoded parameters. I am trying to change an LDAP entry using JNDI with the following code : Attribute newattr = new BasicAttribute("userpassword", password); ModificationItem[] mods = new ModificationItem[1]; mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, newattr); context.modifyAttributes("uid=anID,ou=People,o=MyOrganisation,c=com", mods); If my password contains only ascii characters, it works perfectly, but if I use a non-ascii character, like "à", I have this error message : javax.naming.directory.InvalidAttributeValueException: [LDAP: error code 19 - The value is not 7-bit clean: à]; My ldap supports those characters so I guess it comes from JNDI. Does anyone know how to fix that? Am I supposed to convert my parameter? How can I do that easily? Thanks

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  • Non-Relational DBMS Design Resources

    - by Matt Luongo
    Hey guys, As a personal project, I'm looking to build a rudimentary DBMS. I've read the relevant sections in Elmasri & Navathe (5ed), but could use a more focused text. The rub is that I want to play with novel non-relational data models. While a lot of E&N was great- indexing implementation details in particular- the more advanced DBMS implementation was only targeted to a relational model. I could also use something a bit more practical and detail-oriented, with real-world recommendations. I'd like to defer staring at DBMS source for a while if I can. Any ideas?

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  • Removing 301 redirect from site root

    - by Jon Clements
    I'm having a look at a friends website (a fairly old PHP based one) which they've been advised needs re-structuring. The key points being: URLs should be lower case and more "friendly". The root of the domain should be not be re-directed. The first point I'm happy with (and the URLs needed tidying up anyway) and have a draft plan of action, however the second is baffling me as to not only the best way to do it, but also whether it should be done. Currently http://www.example.com/ is redirected to http://www.example.com/some-link-with-keywords/ using the follow index.php in the root of the Apache2 instance. <?php $nextpage = "some-link-with-keywords/"; header( "HTTP/1.1 301 Moved Permanently" ); header( "Status: 301 Moved Permanently" ); header("Location: $nextpage"); exit(0); // This is Optional but suggested, to avoid any accidental output ?> As far as I'm aware, this has been the case for around three years -- and I'm sorely tempted to advise to not worry about it. It would appear taking off the 301 could: Potentially affect page ranking (as the 'homepage' would disappear - although it couldn't disappear because of the next point...) Introduce maintainance issues as existing users would still have the re-directed page in their cache Following the above, introduce duplicate content Confuse Google/other SE's as to what the homepage actually is now I may be over-analysing this but I have a feeling it's not as simple as removing the 301 from the root, and 301'ing the previous target to the root... Any suggestions (including it's not worth it) are sincerely appreciated.

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  • ubuntu 10.04: boot error for custom compiled kernel - gave up wating for root device

    - by atharva
    Hi, I have installed lucid on my Lenevo Laptop (Y 410 series , x86 platoform) and it is working fine. Now I have compiled kernel 2.6.37 from the downloaded from the kernel tree. I followed usual procedure of compileing kernel (make menuconfig,make. make modules etc). Then I created the initrd image using mkinitramfs and updated my grub using upadate grub command. Update-grub detects the initrd image of the compiled kernel. However when I boot from this kernel it gives me following error: Gave up waiting for root device. Common problems: -Boot args (cat /proc/cmdline) -Check rootdelay= (did the system wait long enough?) -Check root= (did the system wait for the right device?) -Missing modules (cat /proc/modules; ls /dev) ALERT! root=UUID=/... does not exist and then it falls onto initramfs prompt. I have tried following solutions discussed in different ubuntu forums: 1. disable uuid and point root=/dev/sda8 (sda8 is where my kernele image resides (both default kernel and compiled one) from /etc/default/grub 2. compile kernel using CONFIG_DEVTMPFS=y suggested here Still I am unable to boot from the compile kernel. Could someone please suggest me the solution ?

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  • Ubuntu 10.04: boot error for custom compiled kernel - gave up waiting for root device

    - by atharva
    I have installed lucid on my Lenevo Laptop (Y 410 series , x86 platform) and it is working fine. Now I have compiled kernel 2.6.37 downloaded from the kernel tree. I followed usual procedure of compiling kernel (make menuconfig, make, make modules etc). Then I created the initrd image using mkinitramfs and updated my grub using update-grub command. update-grub detects the initrd image of the compiled kernel. However when I boot from this kernel it gives me following error: Gave up waiting for root device. Common problems: -Boot args (cat /proc/cmdline) -Check rootdelay= (did the system wait long enough?) -Check root= (did the system wait for the right device?) -Missing modules (cat /proc/modules; ls /dev) ALERT! root=UUID=/... does not exist and then it falls onto initramfs prompt. I have tried following solutions discussed in different Ubuntu forums: disable uuid and point root=/dev/sda8 (sda8 is where my kernel image resides (both default kernel and compiled one) from /etc/default/grub compile kernel using CONFIG_DEVTMPFS=y suggested here Still I am unable to boot from the compile kernel. Could someone please suggest me the solution?

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  • A window that behaves both modally and non-modally

    - by Chris
    I want to create a WPF window that behaves as a modal dialogue box while at the same time facilitating selected operations on certain other windows of the same application. An example of this behaviour can be seen in Adobe Photoshop, which offers several dialogues that allow the user to use an eyedropper tool to make selections from an image while disabling virtually all other application features. I'm guessing that the way forward is to create a non-modal, always-on-top dialogue and programmatically disable those application features that are not applicable to the dialogue. Is there an easy way to achieve this in WPF? Or perhaps there's a design pattern I could adopt.

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  • Rsyslog is not working properly, it does not log anything

    - by Victor Henriquez
    I'm running a Debian server and a couple of days ago my rsyslog started to behave very weird, the daemon is running but it doesn't seem to do anything. Many people use the system but I'm the only one with (legal) root access. I'm using the default rsyslogd configuration (if you think is relevant I'll attach it, but it's the one that comes with the package). After I rotated all the log files, they have remained empty: # ls -l /var/log/*.log -rw-r--r-- 1 root root 0 Jun 27 00:25 /var/log/alternatives.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/auth.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/daemon.log -rw-r--r-- 1 root root 0 Jun 27 00:25 /var/log/dpkg.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/kern.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/lpr.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/mail.log -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/user.log Any try to force a log writing does not have any effect: # logger hey # ls -l /var/log/messages -rw-r----- 1 root adm 0 Jun 26 13:03 /var/log/messages Lsof shows that rsyslogd does not have any log files opened: # lsof -p 1855 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME rsyslogd 1855 root cwd DIR 202,0 4096 2 / rsyslogd 1855 root rtd DIR 202,0 4096 2 / rsyslogd 1855 root txt REG 202,0 342076 21649 /usr/sbin/rsyslogd rsyslogd 1855 root mem REG 202,0 38556 32153 /lib/i386-linux-gnu/i686/cmov/libnss_nis-2.13.so rsyslogd 1855 root mem REG 202,0 79728 32165 /lib/i386-linux-gnu/i686/cmov/libnsl-2.13.so rsyslogd 1855 root mem REG 202,0 26456 32163 /lib/i386-linux-gnu/i686/cmov/libnss_compat-2.13.so rsyslogd 1855 root mem REG 202,0 297500 1061058 /usr/lib/rsyslog/imuxsock.so rsyslogd 1855 root mem REG 202,0 42628 32170 /lib/i386-linux-gnu/i686/cmov/libnss_files-2.13.so rsyslogd 1855 root mem REG 202,0 22784 1061106 /usr/lib/rsyslog/imklog.so rsyslogd 1855 root mem REG 202,0 1401000 32169 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so rsyslogd 1855 root mem REG 202,0 30684 32175 /lib/i386-linux-gnu/i686/cmov/librt-2.13.so rsyslogd 1855 root mem REG 202,0 9844 32157 /lib/i386-linux-gnu/i686/cmov/libdl-2.13.so rsyslogd 1855 root mem REG 202,0 117009 32154 /lib/i386-linux-gnu/i686/cmov/libpthread-2.13.so rsyslogd 1855 root mem REG 202,0 79980 17746 /usr/lib/libz.so.1.2.3.4 rsyslogd 1855 root mem REG 202,0 18836 1061094 /usr/lib/rsyslog/lmnet.so rsyslogd 1855 root mem REG 202,0 117960 31845 /lib/i386-linux-gnu/ld-2.13.so rsyslogd 1855 root 0u unix 0xebe8e800 0t0 640 /dev/log rsyslogd 1855 root 3u FIFO 0,5 0t0 2474 /dev/xconsole rsyslogd 1855 root 4u unix 0xebe8e400 0t0 645 /var/spool/postfix/dev/log rsyslogd 1855 root 5r REG 0,3 0 4026532176 /proc/kmsg I was so frustrated that even reinstall the rsyslog package, but it still refuses to log anything: # apt-get remove --purge rsyslog # apt-get install rsyslog I thought someone had hacked the system, so run rkhunter, chkrootkit, unhide in an attempt to find hide processes / ports and nmap in a remote host to compare with the ports shown by netstat. And I know this doesn't mean anything, but all looks ok. The system also have an iptables firewall that is very restrictive with incoming / outgoing connections. This is driving me crazy, any idea what is going on here? [EDIT - disk space info] # df -h Filesystem Size Used Avail Use% Mounted on rootfs 24G 22G 629M 98% / /dev/root 24G 22G 629M 98% / devtmpfs 10M 112K 9.9M 2% /dev tmpfs 76M 48K 76M 1% /run tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 151M 40K 151M 1% /tmp tmpfs 151M 0 151M 0% /run/shm

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  • Java: static-non-static-this problem

    - by HH
    $ javac TestFilter.java TestFilter.java:19: non-static variable this cannot be referenced from a static context for(File f : file.listFiles(this.filterFiles)){ ^ 1 error $ sed -i 's@this@TestFilter@g' TestFilter.java $ javac TestFilter.java $ java TestFilter file1 file2 file3 TestFilter.java import java.io.*; import java.util.*; public class TestFilter { private static final FileFilter filterFiles; // STATIC! static{ filterFiles = new FileFilter() { // Not Static below. When static, an error: // "accept(java.io.File) in cannot implement // accept(java.io.File) in java.io.FileFilter; // overriding method is static" // // I tried to solve by the change the problem at the bottom. public boolean accept(File file) { return file.isFile(); } }; } // STATIC! public static void main(String[] args){ HashSet<File> files = new HashSet<File>(); File file = new File("."); // IT DID NOT WORK WITH "This" but with "TestFilter". // Why do I get the error with "This" but not with "TestFilter"? for(File f : file.listFiles(TestFilter.filterFiles)){ System.out.println(f.getName()); files.add(f); } } }

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  • What are good NoSQL and non-relational database solutions for audit/logging database

    - by Juha Syrjälä
    What would be suitable database for following? I am especially interested about your experiences with non-relational NoSQL systems. Are they any good for this kind of usage, which system you have used and would recommend, or should I go with normal relational database (DB2)? I need to gather audit trail/logging type information from bunch of sources to a centralized server where I could generate reports efficiently and examine what is happening in the system. Typically a audit/logging event would consist always of some mandatory fields, for example globally unique id (some how generated by program that generated this event) timestamp event type (i.e. user logged in, error happened etc) some information about source (server1, server2) Additionally the event could contain 0-N key-value pairs, where value might be up to few kilobytes of text. It must run on Linux server It should work with high amount of data (100GB for example) it should support some kind of efficient full text search It should allow concurrent reading and writing It should be flexible to add new event types and add/remove key-value pairs to new events. Flexible=no changes should be required to database schema, application generating the events can just add new event types/new fields as needed. it should be efficient to make queries against database. For reporting and exploring what happened. For example: How many events with type=X occurred in some time period. Get all events where field A has value Y. Get all events with type X and field A has value 1 and field B is not 2 and event occurred in last 24h

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  • How to non-greedy multiple lookbehind matches

    - by ArtK
    Source: <prefix><content1><suffix1><prefix><content2><suffix2> Engine: PCRE RegEx1: (?<=<prefix>)(.*)(?=<suffix1>) RegEx2: (?<=<prefix>)(.*)(?=<suffix2>) Result1: <content1> Result2: <content1><suffix1><prefix><content2> The desired result for RegEx2 is just <content2> but it is obviously greedy. How do I make RegEx2 non-greedy and use only the last matching lookbehind? [I hope I have translated this correctly from the NoteTab syntax. I don't do much RegEx coding. The <prefix>, <content> & <suffix> terms are just meant to represent arbitrary strings. Only the "<" in the "?<=" lookbehind command is significant.] I suspect it is something simple but after too many hours of searching I'm giving up on solving it myself. Thanks for the help Art

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  • Error when running binary with root setuid under encrypted home directory

    - by carestad
    I'm using a VPN script for Juniper's Secure Access protocol form here, which executes a binary located under ~/.juniper_networks/network_connect/ncsvc with the following permissions: -rws--s--x 1 root root 1225424 okt. 25 13:54 ncsvc But when I do, I get the following error: ncsvc> Failed to setuid to root. Error 1: Operation not permitted Moving/copying the ~/.juniper_networks folder to e.g. /opt/juniper (with the same owner permissions), I don't get the error. In the forum thread at Ubuntuforums someone pointed out that it's probably because I have encrypted my /home and thus a "problem" with ecryptfs. How can I fix this?

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  • No root file system - Alternate CD + LVM

    - by Carlos
    I am trying to install 11.10 as dual boot with Windows 7. I have all partitioned well as you can see here: http://www.flickr.com/photos/42897978@N00/7111180385/ I burned the Alternate CD ISO to a CD. Boot from it and followed instructions to Partitioning. There, I configured the LVM partitions as follows: Volume Group ubuntu-vg - Uses Physical Volume /dev/sda7 380GB - Provides Logical Volume home-lv 60GB - Provides Logical Volume root-lv 60GB - Provides Logical Volume swap-lv 6GB That is all I want (note that my /boot is outside of LVM) Then when I say that all is Ok and to write it to disk and continue with the installation, I get the following error. !! Partition Disks No root file system No root file system is defined Please correct this from the partitioning menu. What should I fix and how? I tried issuing the "Revert changes to partitions", but nothing happens. It seems that the LVM configuration has already been written to the CD. HELP!!

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  • SEO for site with 301 redirect on root domain to subfolder

    - by Kim
    I've been asked to do SEO for a site. The site is made using Wordpress and prestashop. Because of this the root domain has a 301 redirect to a subfolder - domain/shop/ For my SEO submission work, I know it's not good practice to submit urls that have redirects on them and a lot of the time it's not allowed. After searching the net I think my best bet is to do all my site submissions using the url - domain/shop/ even though it will take a lot more listings to get them up in ranking compared to using their root domain. I'm not sure how it will work. The root domain has the greatest rank then passes rank to the rest of the site. If I'm targeting the subfolder will it work?

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  • Software installed on root partition or on home partition

    - by Tim
    I am planning to install some big softwares such as Matlab (4GB), Mathematica (4GB) on my Ubuntu partitions. I was wondering if I installed them on my home partition, when I reinstall Ubuntu without touching the home partition, will the softwares still be runnable after reinstallation? what are the advantage and disadvantages of installing softwares on root partition and of on home partition? with your answer to the previous questions, what are some reasonable plans for the sizes of root partition and of home partition? Note that I would like to learn programming in C, C++, Java, Python, Lisp, databases under both Ubuntu and Windows, and no games. My laptop has around 230 GB, where I plan to install both Windows and Ubuntu, and reserve 40 GB for Ubuntu (three partitions: swap, root and home), 110 GB for NTFS partition shared between the two OSes, 70 GB for Windows OS partition, and 10 GB that can be added to any of the above partitions. I will change my plan according to your suggestions. Thanks and regards!

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  • Revert permission of /usr back to root

    - by Rodrigo Sasaki
    I was doing some alterations but in one I messed up. I changed the permissions of almost everything inside the /usr folder to my own user. It didn't change everything because it failed in the middle of the execution, I still have /sbin, /share and /src assigned to root. the command I ran was this (this was executed while inside /usr): sudo chown -R myuser:myuser . Is there any way for me to revert this? If I run: sudo chown -R root:root . I get this error: sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set

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