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• Why does 'dd' not work for creating bootable USB?

  - by jdowner

  Recently I wanted to create a bootable USB of Linux mint. I found that there was a lot of conflicting advice/experience about whether the 'dd' command could be used to create a bootable USB. I decided to download an ISO and try. While dd definitely put the image on the USB stick it was not bootable. So my question is what is the magic ingredient that will make this work or why has this approach persisted if it does not work? This is the command I used, dd if=/mint/iso/image of=/dev/sdb1 oflag=direct

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• Is there a postfix mysql virtual_maps append_at_origin workaround so I can pipe to external scripts?

  - by FilmJ

  I am using virtual domains, and I'd like to setup the server to alias to custom scripts. I manage all accounts using postfix mappings to mysql. It seems that postfix automatically appends a virtual domain regardless of how the forwarded/aliased result comes back. So even though i have: "|/bin/command" postfix is reading it as: "|/bin/command"@mydomain.com Is there any work-around, or setting I can fix? It would seem than append_at_myorigin=no would be ideal, but that's unsupported according to the documentation. Another option, maybe I can skip virtual aliases altogether and use the "/etc/postfix/aliases" table - assuming all emails go to the main domain. I'll try this, but if anyone has any other ideas how to make it work with virtual domains, please let me know as this would be very useful! Thanks.

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• Psychonauts, what to do with 'psychonauts-linux-06042012-bin'?

  - by coldcaption

  Psychonauts came in a neat file called psychonauts-linux-06042012-bin. The file system calls it an executable, but I can't find a way to execute it. Ubuntu suggested using "PyPar2" to open it like an archive, which made it into a bunch of .par2 files, but it then couldn't find anything else to open those. It seems that other people have been able to start the game, so what should I do differently?

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• Two 24' displayed vertically in Ubuntu

  - by QuinnBaetz

  I just got two 24' inch monitors, and want them to display vertically side by side. I got one to but can't figure out the command to get them both vertical and displaying. xorg.conf: Section "Monitor" Identifier "Configured Monitor" EndSection Section "Screen" Identifier "Default Screen" Monitor "Configured Monitor" Device "Configured Video Device" SubSection "Display" Virtual 3840 1200 EndSubSection EndSection Section "Device" Identifier "Configured Video Device" EndSection xrandr: Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 3840 x 1200 VGA connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm 1920x1200 60.0*+ 1600x1200 60.0 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.0 60.0 800x600 75.0 60.3 640x480 75.0 59.9 720x400 70.1 TMDS-1 connected 1920x1200+1920+0 (normal left inverted right x axis y axis) 518mm x 324mm 1920x1200 60.0*+ 1600x1200 60.0 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.0 60.0 800x600 75.0 60.3 640x480 75.0 59.9 720x400 70.1 any clue on the command to make them vertical? Thanks!

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• Run preseed commands as specific user / switching users

  - by pduersteler

  Beside the usual setup where I create a normal user foo, I want to run a few d-i preseed/late_command commands as that foo user. My initial thought was to simply call those commands with sudo, e.g: d-i preseed/late_command in-target echo "<pwd>" | sudo -Si <command>. This works for some sort of commands. However the problem is that some of the commands load up shell scripts which require to not be run with sudo. Issuing a su -c "<command>" would be an alternative, but su does not offer the possibility to read the password from stdin. Is it safe to jump around between the users using su (And if yes, how do I provide the stdin? and does it work or just result in a su: must be run from a terminal) or would this cause issues?

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• How to install php cli with pnctl alongside Zend Server

  - by fazy

  I have Zend Server CE 5.6 with PHP 5.2 running on Ubuntu 11.10. Now the need has arisen to run a command line PHP script that uses PHP's pnctl functionality. First of all, I had no PHP command line in my path, so I made a symlink from the Zend one: sudo ln -s /usr/local/zend/bin/php /usr/bin However, when I run my script, I now get this error: PHP Fatal error: Call to undefined function pcntl_fork() The Zend web control panel doesn't offer pnctl in the list of modules, so how do I get this functionality? Is it safe to use apt-get to install PHP directly, to run alongside the Zend instance? If so, how do I make sure I get version 5.2? I guess the following would pull in PHP 5.3: apt-get php5-cli I could probably muddle through but any pointers to help me avoid making a mess would be much appreciated!

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• Regex working in RedHat is not giving any result in Ubuntu

  - by Supratik

  My goal is to match specific files from specific sub directories. I have the following folder structure `-- data |-- a |-- a.txt |-- b |-- b.txt |-- c |-- c.txt |-- d |-- d.txt |-- e |-- e.txt |-- org-1 | |-- a.org | |-- b.org | |-- org.txt | |-- user-0 | | |-- a.txt | | |-- b.txt I am trying to list the files only inside the data directory. I am able to get the correct result using the following command in RHEL find ./testdir/ -iwholename "*/data/[!/].txt" a.txt b.txt c.txt d.txt e.txt If I run the same command in Ubuntu it is not working. Can anyone please tell me why it is not working in Ubuntu ?

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• Is there anyway that I can set the 'real' memory usage value while running my java code?

  - by vira

  I'm running a code on a server to generate a 10,000x10,000 matrix and save each value into a table (MySQL). I was informed by the administrator that I can use up to 32g of the physical memory of our server but have no idea how to do it. I googling around and so far only found information about setting the virtual memory using -Xmx. I tried it anyway and using top command I got this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3981 gv 35 15 32.4g 304m 10m S 1 0.5 9:54.84 java So, it shows that the -Xmx set the VIRT and not the RES value. Is there anyway that I can set the RES value into 32g?

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• Grub not loading after Windows 8 Install

  - by RazorXsr

  My system was configured to dual boot Ubuntu 12.04.1 LTS and Windows 7. Today I got my hands on the MSDN release of Windows 8 and I installed it over my Windows 7. Now the computer just boots to Windows 8 directly without loading the GRUB screen. So I followed the steps as suggested in: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows. Running this command: ls -l /dev/disk/by-label/ gives the following output: total 0 lrwxrwxrwx 1 root root 10 Sep 11 07:51 Entertainment -> ../../sda2 lrwxrwxrwx 1 root root 10 Sep 11 02:45 PENDRIVE -> ../../sdb1 Also fdisk -l command gives this as the output: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x1246aa23 Device Boot Start End Blocks Id System /dev/sda1 * 2048 319582199 159790076 7 HPFS/NTFS/exFAT /dev/sda2 319582208 602906623 141662208 7 HPFS/NTFS/exFAT /dev/sda3 602908672 625135615 11113472 83 Linux Disk /dev/sdb: 1939 MB, 1939865600 bytes 64 heads, 63 sectors/track, 939 cylinders, total 3788800 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdb1 * 2248 3788799 1893276 c W95 FAT32 (LBA) So I assume that I have to run this: sudo grub-install /dev/sda3 to get GRUB up and running. But I am getting this error: /usr/sbin/grub-probe: error: cannot find a device for /boot/grub (is /dev mounted?). Can anyone please guide me in the right direction? The current Ubuntu installation is far too customized to my needs to lose it to a boot manager issue! Any help is much appreciated!

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• Kernel panic - not syncing: no init found. Try passing init=option to kernel

  - by deepak

  I formatted all the partitions in my computer to a single ext4 partition and did a fresh installation of Ubuntu 13.04. I'm getting: Failed to execute /init Kernel panic - not syncing: no init found. Try passing init=option to kernel. Even on clean reinstall the issue persist. Booting from recovery mode leads to same error, so not able to reach the terminal. But able to boot from Live CD. Any help much appreciated.

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• What sysadmin must do to run OS with damaged /lib/libc.so file ? / rsyslogd daemon logrotation / deny checking list of running processes

  - by Virtual_Lotos

  What sysadmin must do to run OS with damaged /lib/libc.so file ? In other words, how command interpreter should be configured to be able to run system with corrupted /lib/libc.so file ? Do I have to move it to /var catalog ? Does the command interpreter must be statically compiled or have setuid attribute or perhaps must be a symbolic link to /bin/sh or must be no larger than 2MB ? How to prevent a user from checking list of processes started by another user ? How do I forbid a user to see which processes are running by another user ? What do I have to keep in mind when I want to make rsyslogd daemon logrotation ?

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• How to run video from total commander(wine)?

  - by 101

  When I click on video file nothing happens, I tried to make a link to it /media/DATA/#TO_BACKUP/_MUSIC/MUSIC2/Black Eyed Peas - The Time (Dirty Bit).avi but it says Failed to execute child process "/media/DATA/" (Permission denied) Opening the full location from MediaPlayer does not work (open location) Location not found I can open it slowly by navigating in the slow file open dialog, but I would like to open it from totalcmd or by created link or by passing full location. P.S. Before that I have opened the DATA Partition.

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• Route using certain IP address

  - by spa

  I have a server with two public IPs. Both IPs are added to eth0 using ip addr add. Now I'd like to contact a server which uses IP address filtering. Only requests are allowed which use the second IP address. Is there are way to set this up using the standard route command in Linux? I guess that's not the case. So the only solution I see right now: Setup a virtual device let's say eth0:0 and bind the second IP address to it. Then I can reference the device in the route command. Edit: I can't use the second IP as primary one easily as this IP is used as failover IP.

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• Managing TFS Workspaces

  - by Enrique Lima

  You are the administrator (or since you may be the one that knows the most about it) and you need to do some cleanup on what is connected and perhaps even cleanup after people that have left the organization and left some code checked out in their workspace. What permissions do I need? You will need to have Administer Workspaces permission to perform the following tasks. The commands. In order to execute the commands, you will need to open a Visual Studio Command Prompt, once there you will be able to use the tf command.  This has a nice set of options, which I will be providing a listing for later on in another post. To list all workspaces registered: tf workspaces /collection:<url to your TPC> <workspace>;<owner> To delete a specific workspace: tf workspace /delete /server:<url to your TPC> <workspace>;<owner> If for any reason a workspace has embedded spaces, then surround that with “” (double quotes).

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• UBUNTU 12.10 loaded. after that boot sector changed from win to grub

  - by Rupam Roy

  After installing Ubuntu 12.10, to my pc and giving a patjh in the external HD, its root dir only went into that and all files on the hd of my PC.Now i required the Ex HD everytime to go to either Win or Linux. I deleted the partition made by linux from disk management of Win, and now want to change the boot sector of my HD of PC back to win. Pc is not starting up and showing Grub failure. I have the original win 7 os. I tried with that going to the command line, but what is the command that takes me to DVD. I ve tried 'cd dvd' and 'cd/ dvd'. Plese help.

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• dist-upgrade broke my insatll HELP

  - by diefuchsjagden

  so I ran apt-get update; apt-get dist-upgrade the upgrade failed and I lost the gui, I have an encrypted /home drive. When I run apt-get * (any command) I have all kinds of errors mostly missing depends and thats because apparently my network stack is gone. I have no NIC if I run ifconfig. It doesn't even show up with lspci If I were to do a "clean" install of 10.04 LTS which is what I had on my on my build, will I lose all my data? BTW I was just using Ubuntu's default encryption to manage the encryption using my PSWD as the key so if I were to use the same user name and PSWD would my data be accessible? I can see my data from command line, when or if Xorg does start it just loads a basic window with nothing but a black X in the middle of the screen which I can only assume is my mouse cursor but it doesn't move! Reddit /r/linux had some ideas none of which worked was, no help. And apparently /r/ubuntu is full of jerks because all they did was ridicule me. If I can get my install back I probably will be switching back to either Slackware or Gentoo. The Ubuntu forums were of no help they had the same suggestion as /r/linux. I am about to just run my back up script to my back up drives and nuke everything else but I'd rather not.

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• Restarting Nagios Using PHP

  - by X-Ware

  I am making a tool that is interacting with NAGIOS where some config files should be added so a restart will be needed. What I need to know is how to restart NAGIOS using PHP code since this tool is written in PHP .. when I try to do this using: shell_exec("service nagios restart"); changes do not take place but when I do this manually by the console all changes I did using the PHP script are applied ... after 2 minutes research I found that I am asking linux to execut this command while I am logged in as apache user so I changed the command to: shell_exec('echo "mypass" | sudo -S service nagios restart'); still having the same problem ... new config files are not read until I restart manually any suggestions will be appreciated :)

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• PuTTY: how to properly emulate -t option

  - by John Sonderson

  On Linux the ssh command has a -t option whose man page reads: Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocate, even if ssh has no local tty. I would like to use this same option with PuTTY on Windows. In particular, I can see that PuTTY has a bunch of options under: Category - Connection - SSH - TTY and suspect it might be possible to achieve the same behavior via some of the (NUMEROUS!) settings found on this screen. Anyone know how to configure the following command: ssh -t USER,[email protected] create Thanks!

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• How to deploy Windows-8 Enterprise Apps to other users?

  - by TToni

  Windows-8 (Metro) Apps can be installed using "sideloading", bypassing the Windows store in enterprise environments. In principle this is easy: Once you enabled sideloading (which is automatically done when a Win8-machine joins a domain), you can install a signed appx-Package through PowerShell with the "Add-AppxPackage" command. But there is a catch: The App is only installed for the user who executes the command and there is no "-Credentials" parameter! I can probably solve that problem in my specific scenario, where I deploy a self-developed app through TFS build to a virtual machine with a fixed demo user (by using remote powershell in combination with "Add-Job", which does take a credential parameter and because I know the given username and the password). But that is not true in an enterprise environment, where I want to distribute my App to thousands of users. Cracking all their passwords seems a bit over the top, so what would be the "correct" way to do this? I can't find any useful information from Microsoft about this, but maybe one of you already ran into this problem and solved it?

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• How do I know if I am running 32 or 64-bit Linux?

  - by webwesen

  what would be a command to run in different distros?

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• using sed to replace two patterns within a larger pattern

  - by Hair of the Dog

  Using sed how could I replace two patterns within a larger pattern on a single line? Given a single line of text I want to find a pattern (Let's call this the outer pattern) and then within that outer pattern replace two inner patterns. Here's a one line example of the input text: Z:\source\private\main\developer\foo\setenv.sh(25): export 'FONTCONFIG_PATH'="$WINE_SHARED_SUPPORT/X11/etc/fonts" In the example above the outer pattern is "/^.*([[:digit:]]+):/" which should equal "Z:\source\private\main\developer\foo\setenv.sh(25):" The two inner patterns are "/^[A-Za-z]:/" and "/\/". Another way to phrase my question is: Using sed I know how to perform replacements of a pattern using the "s" command, but how do I limit the range of "s" command so it only works on the portion of the input string up to the "(25):"? The ultimate result I am trying to get is the line of text is transformed into this: /enlistments/source/private/main/developer/foo/setenv.sh(25): export 'FONTCONFIG_PATH'="$WINE_SHARED_SUPPORT/X11/etc/fonts"

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• nm-applet and nmcli don't work in arch

  - by user1780765

  I installed arch linux about two weeks ago. But I still can't use Network Manager. When I use nm-applet command, I get this error: https://gist.github.com/4129816 And when I use nmcli con command, I get this: https://gist.github.com/4129837 sudo doesn't help me neither. D-Bus look fine, I can use dbus-monitor. I installed gnome, but I still can't use NM. I 'm using openbox now. I have another problem too: what should do so I can use nm-connection-editor with non-root users?

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• Why can't I install MySQL on my computer? [closed]

  - by Bea

  I have read a lot of tutorials, but I am still having problems. What I tried: I downloaded mysql-5.5.9-winx64. All that I read says that I can run Setup.exe, but there is no such file in the download. The other option I know there is, is including \mysql-5.5.9-winx64\bin in the PATH variable and then trying to execute the mysql command. When I do that, the error I get is: ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost' (10061) I then downloaded mysql-5.5.9-winx64.msi, which is easier to install, but once I followed the instructions and it was installed, I got the same error executing the mysql command. How can I use MySQL? EDIT: I've now removed everything I installed, and I want to start from scratch.

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• Dropping Cached Memory on FreeBSD

  - by user1066698

  i use FreeNAS server which is built on OS version FreeBSD 8.2-RELEASE-p6. I use ZFS file system with 13TB HDD on my 8GB physical ram installed box. It almost uses all of RAM installed while proccessing some request. However, it still uses same amount of memory on idle times. So this is becoming a problem sometimes. On my centos web server; i use following command to drop cached memory with a cronjob; sync; echo 3 > /proc/sys/vm/drop_caches However, this command does not work on my Freenas server. How can i drop cached memory on my FreeNAS box which is built on FreeBSD 8.2 Thank you

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• Lubuntu 13.04, kernel still 3.8.0-32-generic

  - by Blue Ice

  My question is very similar to Ubuntu 13.10, kernel still 3.8.0-31-generic. Recently was updating to Saucy and the ethernet cable got unplugged. So I decided to run Software Update again, to reinstall files. It returned that "everything is up to date". But according to these command-line searches, that is incorrect. How can I install Saucy now safely from the command line? sudo apt-get install lubuntu-desktop Reading package lists... Done Building dependency tree Reading state information... Done lubuntu-desktop is already the newest version. The following package was automatically installed and is no longer required: linux-image-extra-3.8.0-19-generic Use 'apt-get autoremove' to remove it. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. sudo apt-get update Get:1 http://extras.ubuntu.com raring Release.gpg [72 B] Hit http://extras.ubuntu.com raring Release Get:2 http://az-1.hpcloud.mirror.websitedevops.com raring Release.gpg Hit http://extras.ubuntu.com raring/main Sources Hit http://extras.ubuntu.com raring/main i386 Packages Get:3 http://az-1.hpcloud.mirror.websitedevops.com raring-updates Release.gpg Get:4 http://az-1.hpcloud.mirror.websitedevops.com raring-backports Release.gpg Get:5 http://az-1.hpcloud.mirror.websitedevops.com raring-security Release.gpg Get:6 http://az-1.hpcloud.mirror.websitedevops.com raring Release Ign http://extras.ubuntu.com raring/main Translation-en_US Ign http://extras.ubuntu.com raring/main Translation-en Hit http://ppa.launchpad.net raring Release.gpg Ign http://az-1.hpcloud.mirror.websitedevops.com raring Release E: GPG error: http://az-1.hpcloud.mirror.websitedevops.com raring Release: The following signatures were invalid: NODATA 1 NODATA 2 lsb_release -rd Description: Ubuntu 13.04 Release: 13.04 uname -r 3.8.0-32-generic

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