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  • Linux stretch cluster: MD replication, DRBD or Veritas?

    - by PieterB
    For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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  • laptop does not boot

    - by devan
    I have hp probook 4520s lap. But now it does not boot. When I press switch on button fans are working but it shows black screen. HDD light just blink one or two times when start but it will not continue. And usually web cam light should blink one time when startup but it doesn't. I connect to different monitor but couldn't see a output. This lap bought 3 months before but it doesn't have international warranty. Therefore I can not do anything. If someone can provide any clue or suggestion that what happened and what should I do, appreciated. thank you.

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  • Use dns suffixes only on certain wireless networks?

    - by eidylon
    Hello all, quick question. I'm a software guy and networking is all black magic to me! I have a laptop which I use at home and at the office. In order to be able to more easily reference our servers at work, I have our domain name in the DNS suffixes on my TCP/IP settings on my wireless connection. This all works beautifully and I can reference our servers simply by name only. Now the problem... When I go home, it still has those suffixes in there, and I cannot access other servers because it appends the DNS suffixes to the server names. Is there a way I can set up DNS suffixes so that they are only applied when connected to a certain wireless network (I'm thinking by SSID).

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  • MongoDB on FreeBSD

    - by Hartator
    We are currently using MongoDB 2.0.0 on MacOS but our servers are running FreeBSD. The most recent port of MongoDB is the 1.8.3 version. I have tried to compile the 2.0.0 by hand but I came across errors that I didn't manage to fix. I came across on the Internet a few old resources which are saying that MongoDB does not run well on FreeBSD mainly for performance issue (memory mapped files). Is that true ? Does it mean we have to switch our server to another OS ? Thanks for your opinions! Sources : http://groups.google.com/group/mongodb-user/browse_thread/thread/8131b7e5a5c710d9 http://ivoras.net/blog/tree/2009-11-05.a-short-time-with-mongodb.html

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  • How to fix White Screen of Death after updating iTunes?

    - by cust0s
    The other night I updated my iTunes to the latest version (through Software Update) when I came to turn on my computer I was greeted with the dreaded white screen of death. I use an early 2008 iMac 24". I've tried the basic things, unplugging/turning off accessories, trying to boot from the install disk, reseting pram, etc, etc. Still no luck and no change what-so-ever. All I've been able to ascertain that my keyboard still works (by ejecting). I should point out that I did recently replace my Hard drive with a Western Digital Black 500GB (though the computer is well out of warrenty) and I'm a little concerned that the problem could be the screen.

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  • terminal tools and logs for debugging TCP issues

    - by kellogs
    I have a server which I am testing for functionality (not load, not stress) with tsung. 50 users / second, 100 total users. Judging from tsung (tsung is the testing framework) graphs, there TCP connections (red line) drops to 0 while the commenced user sessions (green line) does not. Server logs show nothing to be gripping onto, so I am speculating some kind of TCP issue. Should this be the case ? Where would I look further on the server, any logs / tools to be looking at ? Only SSH available, no GUI. > root@XMPP:~# cat /etc/lsb-release > DISTRIB_ID=Ubuntu > DISTRIB_RELEASE=11.10 > DISTRIB_CODENAME=oneiric > DISTRIB_DESCRIPTION="Ubuntu 11.10" Thank you

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  • SBS 2003 R2 install errors

    - by piagetblix
    I just installed sbs2003 R2 as a learning lab box on my home network. The install seemed to take quit a while with a bit of shuffling between disks 4 and 5. The continue setup checklist showed the red x besides the exchange install and finally gave me an error about the "schema needing extending run, forest /adprep" and told me at the end that the install did not succeed. After a longer than normal reboot it comes up and seems to be OK. What logs do i need to check to see what went wrong? Should i reinstall and try burning the iso's to new media? cheers

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  • Fujitsu siemens V6535 - crash when going standby ?

    - by marc
    Welcome, I trouble with my laptop fujitsu siemens model V6535. My siemens work under Windows 7, and from upgrade time (vista to 7) notice something what make me really angry. When my siemens go to standby mode (when i don't use it for some time), power diode change to red and start blinking (standbay mode). When i push power button (wake up it), blinking diode change to green but nothing else happend (nothing on display, no sound of HDD). When i press power button few second and try turn it on again... it wont display anything... i have unplug charger and then shutdown and power on again without power cable. Then he start working... Few days ago i done upgrade bios to nevest version... but it don't help... Anyone have idea what can be wrong ?

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  • why my server has a dir named "?"

    - by liuxingruo
    These are all the dirs in my server: ? bin boot dev etc home lib lost+found media media2 misc mnt net opt proc root sbin selinux srv sys tmp usr var why there is a "?" dir? Thanks very much. BTW: the touch command was found on my server(wiered). I list the bin dir: alsacard cp dd env hostname loadkeys more ps sed tcptraceroute alsaunmute cpio df ex igawk loadkeys.static mount pwd setfont traceroute6 arch csh dmesg false ipcalc logger mountpoint raw setserial tracert awk cut dnsdomainname fgrep kbd_mode login mv red sh view basename date doexec gawk keyctl ls netstat redhat_lsb_init sleep ypdomainname bash dbus-cleanup-sockets domainname gettext kill mail nice rm sort cat dbus-daemon dumpkeys grep ksh mailx nisdomainname rmdir stty chgrp dbus-monitor echo gtar ksh93 mkdir pgawk rpm su chmod dbus-send ed gunzip link mknod ping rvi sync chown dbus-uuidgen egrep gzip ln mktemp ping6 rview tar touch is missing, how can i get it back?

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  • How to convert .flv file to .3gp using ffmpeg?

    - by Chetana
    I have converted any video format to 3gp file format using ffmpeg on one server. But on another server it not works. Following is my script: exec("ffmpeg -i test.flv -sameq -acodec libmp3lame -ar 22050 -ab 96000 -deinterlace -nr 500 -s 320x240 -aspect 4:3 -r 20 -g 500 -me_range 20 -b 270k -deinterlace -f flv -y test.3gp "); Can anyone tell me what is wrong in script? Following is my ffmpeg setting: root@ninja [~]# ffmpeg -formats ffmpeg version CVS, build 3277056, Copyright (c) 2000-2004 Fabrice Bellard configuration: --enable-mp3lame --enable-libogg --enable-gpl --disable-mmx --enable-shared built on Jun 17 2009 10:51:43, gcc: 4.1.2 20080704 (Red Hat 4.1.2-44)

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  • How to configure sudoers to always keep LD_LIBRARY_PATH envrionment variable?

    - by Yanick Girouard
    No matter what I try, it seems that the LD_LIBRARY_PATH environment variable is not kept after I run a command with sudo. The only way I managed to have it stick, is to prefix my sudo command with LD_LIBRARY_PATH=/the/path whenever I call it from the command-line, but I would like to not have to do this every time. It seems the env_keep option ignores this variable, and so does the exempt_group option. My %group currently has ALL=(ALL) NOPASSWD:ALL as its access in sudoers. I would like this specific environment variable to be kept for any command I run. How can I do this? My server is running Red Hat Enterprise Linux 5.7.

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  • opengl 3d texture issue

    - by user1478217
    Hi i'm trying to use a 3d texture in opengl to implement volume rendering. Each voxel has an rgba colour value and is currently rendered as a screen facing quad.(for testing purposes). I just can't seem to get the sampler to give me a colour value in the shader. The quads always end up black. When I change the shader to generate a colour (based on xyz coords) then it works fine. I'm loading the texture with the following code: glGenTextures(1, &tex3D); glBindTexture(GL_TEXTURE_3D, tex3D); unsigned int colours[8]; colours[0] = Colour::AsBytes<unsigned int>(Colour::Blue); colours[1] = Colour::AsBytes<unsigned int>(Colour::Red); colours[2] = Colour::AsBytes<unsigned int>(Colour::Green); colours[3] = Colour::AsBytes<unsigned int>(Colour::Magenta); colours[4] = Colour::AsBytes<unsigned int>(Colour::Cyan); colours[5] = Colour::AsBytes<unsigned int>(Colour::Yellow); colours[6] = Colour::AsBytes<unsigned int>(Colour::White); colours[7] = Colour::AsBytes<unsigned int>(Colour::Black); glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 2, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, colours); The colours array contains the correct data, i.e. the first four bytes have values 0, 0, 255, 255 for blue. Before rendering I bind the texture to the 2nd texture unit like so: glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_3D, tex3D); And render with the following code: shaders["DVR"]->Use(); shaders["DVR"]->Uniforms["volTex"].SetValue(1); shaders["DVR"]->Uniforms["World"].SetValue(Mat4(vl_one)); shaders["DVR"]->Uniforms["viewProj"].SetValue(cam->GetViewTransform() * cam->GetProjectionMatrix()); QuadDrawer::DrawQuads(8); I have used these classes for setting shader params before and they work fine. The quaddrawer draws eight instanced quads. The vertex shader code looks like this: #version 330 layout(location = 0) in vec2 position; layout(location = 1) in vec2 texCoord; uniform sampler3D volTex; ivec3 size = ivec3(2, 2, 2); uniform mat4 World; uniform mat4 viewProj; smooth out vec4 colour; void main() { vec3 texCoord3D; int num = gl_InstanceID; texCoord3D.x = num % size.x; texCoord3D.y = (num / size.x) % size.y; texCoord3D.z = (num / (size.x * size.y)); texCoord3D /= size; texCoord3D *= 2.0; texCoord3D -= 1.0; colour = texture(volTex, texCoord3D); //colour = vec4(texCoord3D, 1.0); gl_Position = viewProj * World * vec4(texCoord3D, 1.0) + (vec4(position.x, position.y, 0.0, 0.0) * 0.05); } uncommenting the line where I set the colour value equal to the texcoord works fine, and makes the quads coloured. The fragment shader is simply: #version 330 smooth in vec4 colour; out vec4 outColour; void main() { outColour = colour; } So my question is, what am I doing wrong, why is the sampler not getting any colour values from the 3d texture? [EDIT] Figured it out but can't self answer (new user): As soon as I posted this I figured it out, I'll put the answer up to help anyone else (it's not specifically a 3d texture issue, and i've also fallen afoul of it before, D'oh!). I didn't generate mipmaps for the texture, and the default magnification/minification filters weren't set to either GL_LINEAR, or GL_NEAREST. Boom! no textures. Same thing happens with 2d textures.

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  • My Smart-Pad doesn't work, even when I activate it

    - by Darryn
    I have an Asus X5DIJ, and I have had it since Christmas. However, today, the Smart-Pad stopped working. I wasn't clicking anything, I was just typing. Someone suggested downloading drivers, and I'm not to good with guides, so can anyone assist me? Also, when I click on the Smart-Pad icon in the notification area, that icon is crossed out. There is a red X over it, no matter if it is on / off. Can anyone help me, this has happened to my cousin who has the same laptop as me, he now uses a mouse, but I'd rather keep the Smart - Pad.

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  • Eliminating "phantom" or "ghost" clicks on my Mac Pro

    - by fbrereto
    Recently on my Mac Pro I have been experiencing phantom clicks and other strange behaviors. I have been rummaging through my system preferences to try and root out possible causes, and recently came across a strange finding in the Exposé panel (the keyboard modifiers are there from my taking the screenshot): I have had a Logitech 2-button mouse with a mouse wheel for years, and have never had a problem with it in the past. In addition I am running OS X 10.6.8 and have not had any issues like this up to this point. Is this a known issue? Is the extensive mouse listing a red herring? Are there any fixes for either issue?

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  • How can I force Windows 7 to REindex a folder?

    - by Claudiu
    I asked Windows 7 to index my entire "Media" folder. After it was done it'd find anything in there, no problem. Then I reorganized it a bit and moved some folders around, and now it doesn't find things inside those folders anymore. For example, I'm looking at a folder with the files: 01. Ferry Corsten - Shelter Me.mp3 02. Ferry Corsten - Black Velvet.mp3 ... 05. Ferry Corsten - Made Of Love.mp3 ... I type in "Love" in the search box for the current folder, and it doesn't find anything. I checked in "Indexing Options", and this very folder is checked off in there. It seems I just messed up its indexing feature. Any ideas how fix?

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  • Automate configuration change on Outlook 2007

    - by Julien Vehent
    I am migrating a bunch of mailboxes to google apps. Each user owns several mailboxes each serving different domains (john has [email protected], [email protected], and so on...) Currently, those accounts are hosted on (edit:NOT an exchange server) an old SMTP/POP server we want to replace, and I need to edit their outlook 2007 configuration to change the pop, smtp and password parameters. The hard way to do it is to connect to each outlook session and edit the parameters manually. I want to avoid that. Because that represents over 700 accounts spread between 40 users... :'( How can I automate this configuration change ? In the active directory ? Using a PRF file ? note: I'm a linux sysadmin with very little knowledge of windows's black magic.

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  • Configuring Redhat / CentOS 5 SSH to authenticate to IPA server with public keys

    - by Kyle Flavin
    I'm trying to configure some Red Hat/CentOS servers to use an ipa-server on CentOS 6 for SSH authentication with public keys. I'm storing the public keys on the IPA server, which works great on Centos6 using "AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys" in /etc/ssh/sshd_config. However, on RH 5.10, neither the "AuthorizedKeysCommand" directive or the "/usr/bin/sss_ssh_authorizedkeys" command exist to pull the public key from the directory. Is there a different way to make this work? Googling this mostly returns instructions for setting it up on 6.

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  • Computer Flashes Out?

    - by GuyNoir
    We have a strange problem with our computers at my school. They are all Latitude 2100 Netbooks. At random points (I can't seem to find a pattern) the screen will turn a single color (red, green, black, brown, etc.) To fix this, the computer must be put to sleep, and brought back up. They have integrated graphics, but I can't imagine that if it was a bug with the computer itself, that every single computer would do this. Is there any way I could find out the problem that's causing this. Some diagnostic tool? Thanks. Edit: Forgot, they all have windows.

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  • MouseMotionListener inside JTable

    - by Harish
    I am trying to add MouseMotion event to the label and move it based on the dragging of the mouse and make it move along with my mouse.However the mousemotion is very difficult to control making this action not usable. Here is the code import java.awt.Color; import java.awt.Component; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.SwingConstants; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.DefaultTableModel; public class TableTest { public TableTest() { String[] columnNames = { "FileName", "Integer" }; Object[][] data = { { new FileName("AAA.jpg", Color.YELLOW), new Integer(2) }, { new FileName("BBB.png", Color.GREEN), new FileName("BBB.png", Color.GREEN) }, { new FileName("CCC.jpg", Color.RED), new Integer(-1) }, }; DefaultTableModel model = new DefaultTableModel(data, columnNames) { public Class getColumnClass(int column) { System.out.println("column is" + column); return getValueAt(0, column).getClass(); } }; JTable table = new JTable(model); //JTable table = new JTable(data, columnNames); table.setDefaultRenderer(FileName.class, new FileNameCellRenderer()); final JLabel label = new JLabel("TESTING", SwingConstants.CENTER); label.setBackground(java.awt.Color.RED); label.setBounds(450, 100, 90, 20); label.setOpaque(true); label.setVisible(true); label.addMouseMotionListener(new MouseMotionListener() { public void mouseDragged(MouseEvent arg0) { label.setBounds(arg0.getX(), arg0.getY(), 90, 20); } public void mouseMoved(MouseEvent arg0) { // TODO Auto-generated method stub } }); table.add(label); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(table); frame.setSize(800, 600); frame.setLocationRelativeTo(null); frame.setVisible(true); } static class FileNameCellRenderer extends DefaultTableCellRenderer { public Component getTableCellRendererComponent(JTable table, Object v, boolean isSelected, boolean hasFocus, int row, int column) { super.getTableCellRendererComponent(table, v, isSelected, hasFocus, row, column); FileName fn = (FileName) v; setBorder(BorderFactory.createMatteBorder(0, 60, 0, 0, new java.awt.Color(143, 188, 143))); return this; } } static class FileName { public final Color color; public final String label; FileName(String l, Color c) { this.label = l; this.color = c; } public String toString() { return label; } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new TableTest(); } }); } } I just want to make the label follow the label follow my mouse and the label should be attached to the table.Is there an easy way than this.

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  • Using Gentoo's `ebegin`, `eend` etc under Ubuntu

    - by Marcus Downing
    We're quite fond of the style of the ebegin, eend, eerror, eindent etc commands used by Portage and other tools on Gentoo. The green-yellow-red bullets and standard layout make for very quick spotting of errors, on what would otherwise be very grey command line output. #!/bin/sh source /etc/init.d/functions.sh ebegin "Copying data" rsync .... eend $? Producing output similar to: * Copying data... [ OK ] As a result we're using these commands in some of our common shell scripts, which is a problem for the people using Ubuntu and other linuxes. (linuces? linuxen? linucae? other distros) On Gentoo these functions are provided by OpenRC, and imported with functions.sh file (whose exact position seems to vary slightly). But is there a simple way of getting these commands on Ubuntu? In theory we could replace them all with dull echos, but we'd rather not?

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  • How can I fix my WRT54GL's constant crashing?

    - by Aarthi
    I have a Linksys WRT54GL wireless router (the old blue-and-black) whose underside indicates it is Version 2. I've noticed that, on wireless mode, if I am on a Skype call or in a Google Hangout, the wireless aspect will crash completely. In addition, if I am connected via an ethernet cord, my quality (that is, how my voice is received) tanks very quickly. I suspect this is due, in part, to my internet connectivity itself (I'm on Comcast instead of Verizon FiOS, as I'd prefer) but I'd like to stop my wireless router's wireless capability from crashing. I considered a firmware upgrade, but it looks to me as if I am upgraded. Short of manually running ethernet all over my house, I'm not sure what to do. How can I solve my wireless router's issues? If the answer is "buy a new router," then that's valid, as well, in my opinion.

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  • How can I enable anonymous access to a Samba share under ADS security mode?

    - by hemp
    I'm trying to enable anonymous access to a single service in my Samba config. Authorized user access is working perfectly, but when I attempt a no-password connection, I get this message: Anonymous login successful Domain=[...] OS=[Unix] Server=[Samba 3.3.8-0.51.el5] tree connect failed: NT_STATUS_LOGON_FAILURE The message log shows this error: ... smbd[21262]: [2010/05/24 21:26:39, 0] smbd/service.c:make_connection_snum(1004) ... smbd[21262]: Can't become connected user! The smb.conf is configured thusly: [global] security = ads obey pam restrictions = Yes winbind enum users = Yes winbind enum groups = Yes winbind use default domain = true valid users = "@domain admins", "@domain users" guest account = nobody map to guest = Bad User [evilshare] path = /evil/share guest ok = yes read only = No browseable = No Given that I have 'map to guest = Bad User' and 'guest ok' specified, I don't understand why it is trying to "become connected user". Should it not be trying to "become guest user"?

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  • What is this Cable for? 4 Pin to 2 Pin from Riser to Perc in Dell R410

    - by Kyle Brandt
    I got a new raid card for a R410 server since the S300 that came with it doesn't support raid with Linux (No work around for this if SAS from what I could find). Anyways, the RAID card has 2 pins on it and there is a cable that that connects to a 4 pin connection on the riser. The cable only has two wires, one black and one red. What is this cable for? My guess would be maybe LED status for the front panel or something like that, but I am just guessing....

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  • No virtual console on ubuntu 12.10

    - by Buzzzz
    When I try to do a ctr-alt f(1-6) in ubuntu 12.10 I only get a black screen with a blinking cursor but no login prompt. Any ideas on what could be wrong? It is a fresh install of 12.10 using a amd radeon 5850 graphics card. i have tried different things in my /etc/default/grub but at the moment I use the following: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' 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 vga=normal" #GRUB_CMDLINE_LINUX="vga=0x0376" #RUB_CMDLINE_LINUX_DEFAULT="vga=0x014c" #GRUB_CMDLINE_LINUX="vga=0x014c" #GRUB_GFXPAYLOAD_LINUX=1600x1200x24 # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console

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  • Colour table cells in Microsoft Word after mail merge

    - by James
    I have an Excel spreadsheet of student data. For each of 30 topics, students are traffic lighted R, A or G (for red, amber, green) in the spreadsheet. I am mail merging individual result print-outs in Word 2010. However, rather than printing the letter R/A/G next to each topic, I would rather change the background colour of the cell to that colour. How can I do this? Is there an option with merge fields or can it be done with a macro (please provide sample code if so - I don't have experience with macros!)

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