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• Mongo Scripting the shell

  - by cKendrick

  On my production stack, I have a front-end server and a Mongo server. I would like to be able to set a cron job on the front-end server to create some logs daily. I wrote a script that does this: ./mongo server:27017/dbname --quiet my_commands.js If I run it from the Mongo server as above, it works fine. However, I would like to be able to run it from the front-end server. When I try to do that, I get: -bash: mongo: command not found Since mongo is not installed on the front end server, it gives me that error. Is it possible to somehow bind mongo to my mongo on the Mongo server?

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• Storing bundled AMI:s at Amazon EC2

  - by Industrial

  Hi everybody, I am totally new on configuring servers and working with EC2, so please bare with me. I managed after a lot of hair pulling to get a server with Ubuntu up and running with memcached and some other goodies that would make a great package for me. I thought that however, when storing it as an AMI with this tool I would be able to have memcached available next time I launched an instance based upon that image. What can I do to make sure that my configuration is saved properly to an instance? Question number two: - Can I someway make a command that is automatically run on server creation, like initiating memcache with "memcache -d -m 1700 -u root" or even a batch of them?

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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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• EC2 hostname ubuntu and ejabberd

  - by aelbaz

  I have questions related to the host name in Ubuntu EC2 instances. I have a IPS elastics for hosts that want to be seen from the internet and I have pointed out in the DNS entries with the computer name to those ips. For example, for elastic IP 11.11.11.11 DNS I added my computer name www.example.com. But I also want to rename the machines which they have, because it is a parameter of the service running on them (ejabberd server). EC2 instances are restarted when changing the host name, and seen on the client requesting dhcp hostname to dhcp Amazon. My question is ... What is the safest method to change the hostname: dhcp client modify, insert the command in rc.local, etc. ..? Could I have a problem with the internal resolution of traffic between EC2 instances? thanks

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• Use ImageMagick to convert TIFF to PNGs, how to improve the speed?

  - by Woo

  I am using "convert" from IM to get PNGs from multi-page TIFF files, everything is good except the speed. From "convert" documentation, I found: For the MNG and PNG image formats, the quality value sets the zlib compression level (quality / 10) and filter-type (quality % 10). For compression level 0, the Huffman-only strategy is used, which is fastest but not necessarily the worst compression. The default PNG compression is 75. So I tried "-quality 0", but almost no changes with the spreed. Anyone can share the ideas of how to improve the spreed? Here are my command: convert 100Pages.tif[0,1,2,3,4,5] -quality 0 100Pages.png Thanks!

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• No monitor output after fresh install of 11.10 64-bit

  - by James

  I have a machine with a Nvidia 8600GT graphics card and a CRT monitor. Previously, I have only used Windows on it, and the graphics card seems to be working correctly in Windows 7. I booted up and installed Ubuntu 11.10 amd64 from the LiveCD and the whole process worked perfectly. When I tried to boot off the hard disk for the first time, the output to the monitor switched off during the splash screen, and this happens consistently. I can ctrl-alt-f2, so I tried an apt-get upgrade, which didn't help; nor did apt-get install nvidia-current. There is nothing that looks relevant in dmesg. Booting with the nomodeset option has no effect. Following the answers in this similar thread, I tried apt-get purge nvidia-173. Both startx and service lightdm start just say the service is already running. Does anyone know how to find out what the problem is? I was wondering if it is just that Ubuntu is trying to use a resolution that the monitor doesn't support, but I can't find out how to change that from the command line.

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• How to run programs from a different directory in unix

  - by user1067358

  I know this is a very simple question, and that many similar (but more complicated!) questions have been asked- So i wanted to ask this in a very plane manner. Sorry if this voids the rules of conduct on this website! I'm very new to using unix. I have a program that converts a ".evt" file to an .rq1, which is used for data analysis. The command to do so is simple, for example: Convert data.evt (this outputs data.rq1). This program, let's say, is located in directory /A and I have a data file that I want to convert in directory /B. How would I go about executing this program without moving the convert program to directory B?

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• Nested %..% representation in Windows 7

  - by prosseek

  In order to organize the PATH environment, I came up with the following method. Setup variable : ABC = "PATH1;PATH2" Set the path variable using the predefined setup variable : Path = %ABC%%DEF% ... It seems to work fine, but I found that some of the variables are not transfomred into real paths when I run the set command. (I mean, the PATH=PATH1;PATH2;%DEF%, for example). What I found was as follows. If the variable name has '_', Windows can't transform it. If the variable has the path with %...% variable, windows can't transform it. Q1 : Am I correct? Q2 : If so, is there a way to by pass the nested %...% varibale problem?

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• Cloning OpenVZ container

  - by Tiffany Walker

  I have an OpenVZ container on 1 host and I would like to clone it over to my server. both run SolusVM. I only have root access to my server and would like to host the container on my server now. Can I use rsync to clone the drive while the OS is running on both? Using a command like this: rsync -uazPx --exclude='/boot' --exclude='/proc' --exclude='/dev' --exclude='/lib' --exclude='/tmp' --exclude='/var/lock' / [email protected]:/ Is there any other areas I should probably not copy over?

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• Configuring php with apache

  - by R11

  I managed to thoroughly confuse myself with php configuration in my apache install (on a mac). I am trying to get xdebug to work in eclipse and noticed that there are two different installs of php on my machine. The one (v5.4.5) in the apache install directory /opt/local/apache2/ and another one (v5.3) in the default system directory /usr/bin. My questions are: The php in the apache install directory was installed by me from source. But it does not have a php.ini file, instead it has PEAR.conf and other bunch of conf files. What are they and did I install something wrong? Can I compile apache with php support and have it use the php from the system directory right? How do I know which php its using? httpd -M is the only command i can see. Can I force apache to use a different php?

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• How to type accented characters in Ubuntu 10.04 with an Apple Aluminum Keyboard

  - by jfmessier

  I installed the latest Ubuntu 10.04 and I used to have the Command, Option or Right-Ctrl keys as compose keys to write accented characters. But I find that under Ubuntu 10.04, the Compose Key is not working, even if I specify the proper Apple Keyboard. Since I cannot work with other keyboard layouts than the plain USA one along with compose keys (I never learned, and I hate, the French layout), this about my only way to input accented characters. I still have to try it with a regular keyboard to see whether there is a difference. Thanks :-)

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• ifconfig can't see USB wireless

  - by Alex

  I have a wifi USB dongle which I have previously used on a Raspberry Pi (this it is what it is target at). I am trying to get it working on an Nvidia Jetson TK1, however I am having some problems. When I run ifconfig I can't see the wifi, only the ethernet and local loopback. iwconfig reports no wireless extensions on all devices. lsusb does find the device: Bus 002 Device 008: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter So I am not sure why the network tools can't see it. I have tried logging on with a GUI and opening up the network settings through Unity, but cannot see any wireless devices either. Not sure if this is useful, but output of lsmod: Module Size Used by nvhost_vi 2940 0 How can I enable wireless networking on this computer? Command line approach is preferred, but either is fine. UPDATE I don't have the kernel module rt2800usb anywhere on my system. If I do an apt-file search for rt2800usb it lists a number of packages of the pattern: linux-image-3.13.0-*. Perhaps installing one of these will do the trick, but can anyone tell me if its safe to do so?

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• debian dependencies (libssl-dev and libncurses5)

  - by RubyFreak

  I'm trying to install under RVM the Ruby Enterpise (REE) under debian My debian is squeeze (uname -r) 2.6.18-194.26.1.el5.028stab070.14xen i did try to install ree but it complains that it is missing libssl-dev and libreadline5-dev. I did update my lenny to squeeze, but i didn't update the kernel, since its a production server. The operational system is already updated and upgraded sources.list: deb http://ftp.de.debian.org/debian/ squeeze main contrib non-free deb-src http://ftp.de.debian.org/debian/ squeeze main contrib non-free deb http://security.debian.org/ squeeze/updates main deb-src http://security.debian.org/ squeeze/updates main I did try to install it using the following command: apt-get install libssl-dev libreadline5-dev But unfortunately i'm getting the following problems: The following packages have unmet dependencies: libreadline5-dev: Depends: libncurses5-dev but it is not going to be installed libssl-dev: Depends: libssl0.9.8 (= 0.9.8o-4squeeze1) but 0.9.8o-6 is to be installed E: Broken packages I was thinking to reinstall those packages and install again, but it has too many dependencies, and it is a production server, that i would like to know if there is any other way to fix it. Or at least to double check if it is necessary to reinstall both :-/

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• Stupid question: prevent file from being changed under linux

  - by Josh

  Ok. Stupid question. I have forgotten what this is called and without remembering the name the search function on the site and on google is failing me. What's the command under linux to mark a file as "locked"/to prevent any changes from being made to it? I'm not talking about chmod. There's a property that can be set (again the name escapes me at the moment) which prevents even processes running as root from changing a file. What is this called and how do I set it?

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• No Other User In Task Manager Users Tab Windows 7

  - by Samuel Adam

  I want to ask why there is only me on Task Manager's Users tab. Originally I wanted to be able to chat with other clients on my local network using msg command, but I can't found any other user. How to see other users on the same network? I use Work Network, and all of the users is using wifi to connect. I googled about it, but no information is close enough. As much as a newbie question it sounded, I really appreciate any help. Thank you ! :)

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• Offlineimap -- push changes to all folders; only pull from INBOX folder

  - by g33kz0r

  I would like to be able to set up offlineimap to do the following Sync Remote/INBOX - Local Sync Local/Maildirs/* - Remote Possible? The use case here is: I download all new mail from my remote IMAP INBOX folder with offlineimap. offlineimap's posthook command calls a custom python script which does junk filtering, then sorts and categorizes my mail in the local INBOX folder to various local maildirs based on sender, etc. I read my mail with mutt and perhaps do some more categorization. ? Step 4 is what I'm after. I want offlineimap to push my local changes (categorization, filtering, deletion in the case of spam) back to the various folders on the imap server, but as you can see, there's no need for me to be pulling any changes from folders other than Remote/INBOX, as no changes happen on the IMAP server itself. I hope that's a clear explanation of the problem.

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• How to restore default iPod playlists on Amarok?

  - by obvio171

  I wanted to "reset" the collection on my iPod and ended up accidentally deleting, through Amarok, all the playlists, including the default ones like "Most Played" and "Highest Rated". Since these are dynamic playlists with a special meaning for iPod, I don't think creating new, normal playlists with the same name will bring their special behavior back. How do I restore them with the same dynamic functionality? Is there a way to do that on Amarok? Rhythmbox? GTKPod? Command line? P.S.: not entirely sure what the policy about iPod questions are, but this one in particular seems to me to be very computer-related because, although it's about interfacing with a device, everything has to be done on my computer, using standard PC libraries/programs, etc. If it's still off-topic, please point me to where I could post it.

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• asterisk incoming/miss call notification (to skype)

  - by tike

  My environment: Centos 5.6, Asterisk with freepbx , skype i.e.sends message with parameter skype.sh skype_user message. Now i wanted to send skype notification so that my asterisk server notification are sent to skype rather than email (or to both skype and email). I know, there is voicemail.conf, voicemail_general and vm_email.inc, which has these body created. vm_email.inc emailbody=${VM_NAME},\n\nThere is a new voicemail in mailbox ${VM_MAILBOX} But i dont see where is something like "mail" command. What my thought to do is: instead of saying "mailcmd" pass system ( /path/to/script) and it would simply send message as rest is already configured. Any suggestion where i could run script rather than sending email Or Executing script on every incoming call, so that i could send as notification on every call over the Skype. (however, ultimate goal is to achieve miss call notification or voice mail notification over Skype.)

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• Diff and ignore lines missing in one file

  - by Millianz

  I want to diff two files and ignore lines that are present in one file but missing in the other. For example File1: foo bar baz bat File2: foo ball bat I'm currently running the following diff command diff File1 File2 --changed-group-format='%>' --unchanged-group-format='' Which in this case would produce bar baz as the output, i.e. only missing or conflicting lines. I would like to only print conflicting lines, i.e. ignore cases where one line is missing from File2 and is present in File1 (not the other way around). Is there any way to do something like this using diff or do I have to resort to other tools? If so, what would you recommend?

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• Windows shortcut doesn't work: how to enclose filenames with spaces?

  - by Olivier Pons

  Here's my problem: I've made a shortcut on my Desktop (Windows XP (sigh)) like this: C:\WINDOWS\system32\cmd.exe /k "mysql -u root drupal-defaultadm < ^"C:\Documents and Settings\AAA\Mes documents\Downloads\01.drupal-defaultadm.sql^" && exit" When I double click on it, the DOS prompt is opened, but I get this error: File not found. C:\wamp\bin\mysql\mysql5.5.24\bin> So I'm trying to do the command "by hand" and only removing the ^: C:\wamp\bin\mysql\mysql5.5.24\bin>mysql -u root drupal-defaultadm < "C:\Documents and Settings\AAA\Mes documents\Downloads\01.drupal-defaultadm.sql" C:\wamp\bin\mysql\mysql5.5.24\bin> And gives no error. I'm pretty sure this has to do with the whitespaces enclosed with ". How shall I do to make it work?

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• How to make ip Address static (eth0)

  - by Jordan Angelucci

  I'm having a really hard time configuring ubuntu 13.04 to have a static ip address. I have tried multiple solutions but everytime I reboot (can't do the network reset command because ubuntu freezes) I end up with no connection. Here is what I get when i type ifconfig into the terminal: eth0 Link encap:Ethernet HWaddr 10:bf:48:bc:07:cb inet addr:192.168.0.8 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::12bf:48ff:febc:7cb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1763067 errors:0 dropped:0 overruns:0 frame:0 TX packets:1024326 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2284491220 (2.2 GB) TX bytes:136809317 (136.8 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:1840 errors:0 dropped:0 overruns:0 frame:0 TX packets:1840 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:185688 (185.6 KB) TX bytes:185688 (185.6 KB) I have also tried this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.160 netmask 255.255.255.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 24.222.0.94 dns-nameservers 24.222.0.95 If anyone could help me it would be very much appreciated.

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• Can gedit on mac be used to edit files over ssh?

  - by Dave

  I use a linux machine at work and a mac at home. I can ssh from my machine at home to my work machine. But the only editor that I have access to on the command line then is vi, which I don't like. Is there a way to use gedit on my mac to edit files remotely over an ssh connection? This page says that it can be done, but I think that it assumes that you are using gedit on ubuntu. On my mac (os 10.5.8) I don't have the "bookmark" option when I click "connect to server". http://thecodecentral.com/2010/04/02/use-gedit-as-remote-file-editor-via-ftp-and-ssh-ubuntu/comment-page-1#comment-50558

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• Issue with Windows Server backup

  - by mamu

  I have windows server 2008 r2 installed, Only service running on it is hyper-v. I am trying to take backup using windows server backup feature and it fails with following error in eventlog The backup operation that started at '?2009?-?08?-?22T18:42:14.123000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '2155348129'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved. Above error itself is point to other event logs for more detail but i can't find anything in event logs Then i ran following command vssadmin list writers It had following out of ordinary in list Writer name: 'Microsoft Hyper-V VSS Writer' Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de} Writer Instance Id: {d15c5f78-121c-464f-b23b-f285e919b05c} State: [8] Failed Last error: Inconsistent shadow copy How could i resolve this?

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• Distributing my Application inside a Debian Virtual Machine Image-- How to meet GPL obligations?

  - by bdk

  I have a Linux application I've developed, and I have created a standalone VMWare Image that people can download to try out the application without needing to install and configure a Linux Server. I created this VMWare Image by starting with a base Debian system, installing a bunch of packages and then configuring all the packages and daemons my application depends on. Upon load, the VMWare Image boots right into an X Server running only my application and no Window manager, so its more of a "Virtual Appliance" than a normal Linux Desktop environment. Users generally will never see a command prompt or any application other than my own. (My application itself I have a handle on the licensing issues of) Now I would like to distribute this image, but I'm not sure how to meet my GPL (and other licenses the various Debian components are released under) Obligations. As I understand it, I have two primary obligations to meet. Providing Copyright and License Information for each component I use. As I understand it, all the information I am required to present is located in the /usr/share directory in the Debian, but since my users generally will never touch a console or terminal, they will never see this. Does providing a text file containing a concatenation of all the files inside /usr/share meet this obligation Making source code available for all components I distribute. Since I am not creating the image from source, but from binary packages, I can't provide the actual source code that results in exactly my image being generated. Does providing an ftp mirror and an offer to send that mirror on DVDs of the Debian source debs for all the packages I use meet this obligation? Anything Else I'm required to do to legally distribute this image?

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• Linux - File was deleted and then reappeared when folder was zipped

  - by davee9

  Hello, I am using Backtrack 4 Final, which is a Linux distro that is Ubuntu based. I had a directory that contained around 5 files. I deleted one of the files, which sent it to the trash. I then zipped the directory up (now containing 4 files), using this command: zip -r directory.zip directory/ When I then unzipped directory.zip, the file I deleted was in there again. I couldn't believe this, so I zipped up the directory again, and the file reappeared again but this time could not be opened because the operating system said it didn't exist or something. I don't remember the exact error, and I cannot make this happen again. Would anyone happen to know why a file that was deleted from a directory would reappear in that directory after it was zipped up? Thank you.

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