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• Ubuntu only boots with USB plugged in

  - by Ben

  I'm new to the Linux world so please bear with me! :-) I installed Ubuntu via USB drive onto my hard drive. If I boot the PC without the usb drive I used, Ubuntu will not load. After booting I can unplug without any consequences. I looked on the hard drive and there is a boot folder. On the USB drive, this is the tree contents: /media/disk$ tree . |-- adtext.cfg |-- boot.cat |-- f10.txt |-- f1.txt |-- f2.txt |-- f3.txt |-- f4.txt |-- f5.txt |-- f6.txt |-- f7.txt |-- f8.txt |-- f9.txt |-- initrd.gz |-- isolinux.bin |-- isolinux.cfg |-- ldlinux.sys |-- linux |-- menu.c32 |-- menu.cfg |-- po4a.cfg |-- prompt.cfg |-- splash.png |-- stdmenu.cfg |-- syslinux.cfg |-- text.cfg |-- ubnfilel.txt |-- ubnpathl.txt `-- vesamenu.c32 Am I correct in my assumption that the boot aspect is associated to the USB drive? If so, how do I get it to boot without the USB? I'm guessing copying into some location and modifying grub?

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• How to install Mac OS X from Windows without a CD

  - by John Smith

  I have two partitions, one for windows the other for Mac OS X. Recently, my Mac OS X crashed and my partition rendered unbootable. When I insert Mac OS X's installation CD everything seems normal from startup, to choosing whether to boot from Windows or CD, until the CD boots. The screen flickers and it becomes extremely dark can barely see anything but I can see that it is booted correctly. I tried increasing brightness but that did not work. After hours of trying to read what is on the screen and guessing where to click the installation did not go through... It took more than a couple of hours so I restarted. Now the partition is accessible through Windows but is not bootable. TL;DR Is it possible to install Mac OS X on a visible partition without the CD through Windows XP?... Thanks

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• How can I re-encode H.264 video with minimal quality loss?

  - by SofaKng

  I have a lot of MPEG-TS files (.TS container but H.264 video) and playback is fine except that when you skip forward/backward or fast forward it's very sluggish and gets pixelated, etc. I've been trying to do research and I'm guessing that they were encoding with very few reference blocks (ie. it's a capture from a DVB-S satellite stream). When I re-encode them with Handbrake (.MP4 container) they play very, very good and seeking in the video is instant, etc, etc. Is it possible to transcode/re-encode my MPEG-TS files with minimal quality loss? If so, what is my best bet? They are each about 2 Mbps (ie. 2 GB per hour) but I don't want to re-encode them if "minimal quality loss" requires 10+ GB per file. I'm hoping to keep the video are the same size. Can anybody give me any advice?

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• Can snort output an alert for a portscan (sfPortscan) to syslog?

  - by Jamie McNaught

  I've been working on this for too long now. I'm sure the answer should be obvious, but... Snort manual: http://www.snort.org/assets/125/snort_manual-2_8_5_1.pdf lists two logging outputs on pg 39 (pg 40 according to Acrobat Reader) as: "Unified Output" and "Log File Output" which I am guessing the former refers to the "unified" output mode... which makes me think the answer is "No, snort cannot output alerts for detected portscans to syslog." Config file I've been using is: alert tcp any 80 -> any any (msg:"TestTestTest"; content: "testtesttest"; sid:123) preprocessor sfportscan: proto { all } \ memcap { 10000000 } \ scan_type { all } \ sense_level { high } \ logfile { pscan.log } (yes, very basic I know). A simple nmap triggers output to the pscan.log Can anyone confirm this? Or point out how I do this?

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• Flash Media Server 3.5 Installation Problem.

  - by prateeksaluja20

  Hello Experts, I installed Flash media server 3.5 in windows 7 home basic.it installed properly. When i try to open the media server,and not showing in its FMS ADMIN CONSOLE there. I have beeen checking the windows services, it shows flash media server is running.i have installed FMS in Default port (1935,1111).i have MCAFEE Antivirus.1st time it blocks the My FMs then i Allowed it & after that there is no issue.i am not getting what is the problem,is anything blocking the FMS.Even I am not able to start/see the control panel of FMS (Flash media server). I am guessing it is a port problem,Is it or any firewall issue?Please Suggest.

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• What am I doing wrong with this cat 6 patch panel wiring?

  - by Max Hodges

  top number is transmitter bottom number is remote terminator 12345678 36145278 is this because I could be mixing T568A and T568B wiring? how do I know if my patch cord is A or B? Do I just look at the plug and match it up with the diagram on the back of the panel somehow? EDIT I read that 36145278 indicates a cross over cable, but I'm not trying to make a cross over. Where did I go wrong? I'm guessing the cable plug is T568A but I wired it to the panel using T568B. So I need to redo it as T568A. But in the future how do I know if I cable is A or B? Cheers!

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• Setting up Samba shares on a Linux VPS

  - by 101265052760541259879

  Hi, I'm trying to set up a folder that can be accessed via Windows clients over the net on my Linux VPS on which our companies website resides. I know a little bit about Linux, and have used Samba before to browse Windows shares from a Linux laptop. I'm guessing it's possible to do the reverse - to share a folder from Linux TO a Windows client. I have root SSH access to the VPS, would anyknow know what steps I need to take to set up the share, and how I can secure it, ideally with a simple username/password so the Windows clients can connect easily? Many thanks, Jack

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• Where to start? Server profiling tools

  - by Dave Chenell

  So I have a website, users upload images, people view images etc. Simple enough. Lots of writes and reads everywhere. Its built in MySQL and PHP on Apache. We have one dedicated server. Right now we are getting hammered with unexpected press and users and our CPU cycle is out of control, slowing down the entire site. Off hand I am guessing its either the saving of the image to the disk, or the Mysql queries. What tools can I use to educate myself on what is happening and pinpoint the problem? How can I find out what is happening in detail in this time of crisis?

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• 401 - Unauthorized: Access is denied error from web app running in IIS 7.5 using App Pool Identity

  - by Eric Gatesman

  I have an ASP.NET app on a Windows 2008 server, IIS 7.5. When I try to access web site, I get a login popup. If I click "cancel" I get a 401 - Unauthorized: Access is denied due to invalid credentials. The app is using Windows authentication (anonymous is disabled). The app has it's own app pool, running under the App Pool Identity. If I change the app pool to run under the NetworkService account, my website functions just fine. I'm guessing that this is just a permissions issue, but can't figure out what permissions I need to change. I gave the App Pool Identity permissions on the physical directory of the app, but that didn't solve the problem.

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• SuSE always logs a user in TVM session

  - by rohan

  Hello all, I recently installed Suse Linux enterprise Desktop 11 on my box. I created an user and logged in first time into a GNOME session without any problems. Last time I logged in I selected the session as TWM and that got me into the T windows manager just fine. Now when I log out and try to log back into a GNOME session, it will still log me into the TVM session. I have tried restarting the box but that has not helped. However, when I remote log in to the machine it will let me got on the GNOME session just fine. I'm guessing this is probably a really simple fix, however I am a Linux newbie and doing a google search isn't yielding me what I'm looking for. Thanks in advance for your help, Rohan

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• SuSE always logs a user in TVM session

  - by rohan

  Hello all, Our sa recently installed Suse Linux enterprise Desktop 11 on my work box and I logged in first time into a GNOME session without any problems. Last time I logged in I selected the session as TWM and that got me into the T windows manager just fine. Now when I log out and try to log back into a GNOME session, it will still log me into the TVM session. I have tried restarting the box but that has not helped. Though when I remote log in to the machine it will let me get on the GNOME session just fine. I'm guessing this is probably a really simple fix, however I am a Linux newbie and doing a google search isn't yielding me what I'm looking for. My sa cant figure what is wrong either Thanks in advance for your help, Rohan

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• Storing multipe credentials for the same server.

  - by EmFi

  I have a need to connect to the same exchange server with multiple accounts. I'm using Extra Outlook to simultaneously load different profiles connecting to each account. Here's a simplified example of the accounts I need to use: log in to test.local.domain user1: [email protected] user2: [email protected] user3: [email protected] I am always being prompted for passwords when opening an Outlook instance. Essentialy only the last username/password combination for each server is stored by Vista. So if I launch Outlook with the same profile I used last, before starting launching using a profile for a different account, I'm not prompted for authentication. Aternatively, adding a new entry in Vista's Stored User Names and Passwords dialog with credentials for user2, when there is alraedy an entry for user1 on the same target server will replace the existing user1 entry with the new user 2 entry. I'm guessing the same thing is going on silently behind the scenes when I provide Outlook credentials. How can I configure Vista's credential management to store credentials for multiple users on the same server?

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• sendmail on Ubuntu won't send from www-data user

  - by bumperbox

  I if call mail() function in PHP from webserver (running as www-data) i get an error sending email. If i call the same script from the cmdline logged in as root, then it works If i switch user to www-data and run from the cmdline i get this error message WARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) can not chdir(/var/spool/mqueue-client/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. FAILEDWARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) can not chdir(/var/spool/mqueue-client/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. FAILEDTest Complete$ WARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) I am guessing i need to do something in sendmail configuration I have googled for some solutions but have ended up more confused. Can someone let me know what configuration I need to change to fix so i can send from www-data user?

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• Apache disable DNS lookups

  - by odeceixe

  I'm using Debian 4.3.2-1 and Apache 2 on my production server. Watching the logs, I noticed Apache is resolving client's hostnames even with HostnameLookups Off in apache2.conf. I want to avoid these lookups so I'm guessing Apache is making this DNS query because I have mod_authz_host enabled. When I try to unlink this module, I get several modules complaining because they use the Order directive. How is the clean way to go? Should I comment all Order directives like Order allow,deny Deny from all Is this the only way to stop Apache from making DNS requests? I would like to deny access to .htaccess files and some rules like that.

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• TCP Zero Window with no corresponding Window Update

  - by Gandalf

  I am trying to debug a network issue and am using Wireshark and tcpdump to grab packets from my server. I have one client application that is grabbing all my available connections and then holding them, trying to send A LOT of data and essentially causing an unintentional DOS attack. While debugging I notice that I see my server sending "Window Closed" and "Zero Window" TCP packets - but never sending any "Window Update" packets. I am guessing this is why the client never lets go of the connections (it still has more data to send and is waiting). Has anyone ever seen this type of behavior before? Let's not get into the reasons why I haven't set up an iptables rule to limit concurrent connections (yeah I know). I also recently changed the MTU from 1500 to 9000 - could this have such a negative effect? (Linux) Thanks.

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• getting PHP PDO flavors to work on Mac OS X

  - by Jason S

  I'm running OS X 10.5; it looks like it came with Apache and PHP installed (minus some minor configurations which I turned on per this page; I've used Apache before so I know the basics of how httpd.conf works). I've got a pre-existing script which uses PDO. I've got a MySQL database and can easily configure my script to access the database via PDO MySQL or PDO ODBC. The problem is, that even though I enabled the PDO MySQL and PDO ODBC extensions in php.ini, phpinfo() reports the only PDO drivers are sqlite2 and sqlite. I'm guessing the relevant extension .dll or .so files are not present? How do I get them? note: I'm using the built-in install for PHP. (see apple's page on enabling php, which doesn't say anything about configure or adding additional .so files)

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• Deleted items on Deleted Items folder are not shown

  - by Ken

  When I run this cmdlet, I get the following result: [PS] C:\Windows\system32Get-MailboxFolderStatistics user | ft FolderPath, FolderSize -autosize FolderPath FolderSize ---------- ---------- /Top of Information Store 156 B (156 bytes) /Calendar 244.2 KB (250,025 bytes) /Contacts 1.223 MB (1,282,252 bytes) /Contacts/SenderPhotoContacts 30.41 KB (31,139 bytes) /Conversation Action Settings 0 B (0 bytes) /Conversation History 206.2 KB (211,147 bytes) /Deleted Items 1.449 MB (1,519,602 bytes) /Drafts 472 B (472 bytes) /Inbox 618 MB (648,025,798 bytes) /Journal 144 B (144 bytes) /Junk E-Mail 131.9 KB (135,089 bytes) /News Feed 0 B (0 bytes) /Notes 1.847 KB (1,891 bytes) /Outbox 0 B (0 bytes) /Quick Step Settings 0 B (0 bytes) /RSS Feeds 0 B (0 bytes) /Sent Items 6.754 KB (6,916 bytes) /Suggested Contacts 9.316 KB (9,540 bytes) /Sync Issues 0 B (0 bytes) /Sync Issues/Conflicts 0 B (0 bytes) /Sync Issues/Local Failures 0 B (0 bytes) /Sync Issues/Server Failures 0 B (0 bytes) /Tasks 7.994 KB (8,186 bytes) /Recoverable Items 12.16 MB (12,748,519 bytes) /Deletions 0 B (0 bytes) /Purges 0 B (0 bytes) /Versions 0 B (0 bytes) But when I open the mailbox using both Outlook and OWA, the deleted items folder is empty. I'm guessing it's corrupted or something like that. Is it possible to recover it somehow? Thanks.

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• Puppet won't execute command

  - by tom

  Puppet 0.25.4 on ubuntu point blank refuses to execute the following command: exec {"initiate replica set": command => "echo 'rs.initiate()' | mongo", path => ["/usr/bin","/usr/sbin","/bin"], user => "root", require => Class["mongodb"] } I can execute the command as root myself, so I'm guessing perhaps it's an issue with the shell. Unfortunately upgrading puppet isn't an option (and causes other issues anyway). I've tried specifying explicit paths to the binaries instead of relying on the path parameter, and also changing the command to: "bash -c \"echo 'rs.initiate()' | mongo\"" Still doesn't work. Any ideas? I get an error message saying something like "failed to change from notrun to 0"

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• Is it common to have portable hard drive not recognize?

  - by lamwaiman1988

  I have a bad hard drive which could not be recognized by windows. If windows can recognize it, it could just be pure luck. There are better chance of it being recognize by plugging it at the usb back of the machine, rather than the front one. More interestingly, I have a usb cable which fork itself at one side ( i.e it has 2 heads at one side ). I can plug both heads to the machine and connect the portable hard drive on the other end of the usb cable? Can I get more voltage by doing this? I am guessing the front usb port doesn't have enough power. I am wondering if I buy a new portable usb hard drive, would it have easy read by plugging at the front usb port? I am not sure if I screw up the jumper connecting the front usb ports, but it is okay for other device such as usb stick and mouse.

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• Map Caps-Lock to Control in Windows 8.1

  - by Eric Huang

  Before the Windows 8.1 update, I was able to map Caps-Lock to Controls through the type of registry tweak in this post: Remapping a keyboard key in windows 8.1 However, after updating to 8.1, my tweak no longer works. What I had done was Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout] "Scancode Map"=hex:00,00,00,00,00,00,00,00,02,00,00,00,1d,00,3a,00,00,00,00,00 Windows 8.1 may have changed how it interprets the keyboard layout registry, I'm guessing. I'm an avid emacs user, so this problem is a life-or-death scenario for me.

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• Remapping Home/End from PC to Mac Via Synergy is not client specific.

  - by DtBeloBrown

  This question asks about the end key but the answers give no examples: http://superuser.com/questions/60052/what-key-works-like-end-using-a-mac-with-synergy If they had, I am guessing that they would likely have run into this problem. Adding lines like the bottom two of this: section: options keystroke(End) = keystroke(Control+Right,myiMac) keystroke(Home) = keystroke(Control+Left,myiMac) to my synergy.sgc in MyDocuments on the winXP machine would work but causes the keys to stop functioning on the winXP machine. Unacceptable. I next tried a compromise: keystroke(End) = keystroke(Control+Right,myiMac); keystroke(End,myPc) keystroke(Home) = keystroke(Control+Left,myiMac); keystroke(Home,myPc) Expecting that to broadcast the keystrokes to both machines regardless of which one was the Active Screen. That and many other variations did not work. What am I doing wrong? Has someone actually done this?

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• Mac OS X CD ripping speed

  - by SlimSCSI

  I am using vobcopy (installed via macports) to rip DVDs on a mac. I have been doing this for a while on linux with no problems. On the mac however, it is VERY slow. I am guessing that somehow the DVD drive is being limited to 1x in order to keep noise and power consumption down during playback. Is there a way to over ride this? Update: It is MUCH slower than 1x. It has taken me about an hour to copy 300MB Notes: While I appreciate all suggestions, I am not looking for "Have you tried HandBrake?". I am looking for a solution to copy the contents of a DVD, not transcode them. Also, I am launching vobcopy from an apple script that gets executed on DVD insertion, so a GUI solution is not desirable.

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• Netcat server output with multiple greps

  - by Sridhar-Sarnobat

  I'm trying to send some data from my web browser to a txt file on another computer. This works fine: echo 'Done' | nc -l -k -p 8080 | grep "GET" >> request_data.txt Now I want to do some further processing before writing the http request data to my txt file (involving regex maniuplation). But if I try to do something like this nothing is written to the file: echo 'Done' | nc -l -k -p 8080 | grep "GET" | grep "HTTP" >> request_data.txt (for simplicity of explanation I've used another grep instead of say awk) Why does the 2nd grep not get any data from the output of the first grep? I'm guessing piping with netcat works differently to what I've assumed to get this far. How do I perform a 2nd grep before writing to my txt file? My debugging so far suggests: It is nothing to do with stderr vs stdout Parentheses don't help

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• on Red Hat Enterprise and CentOS, what is creating /var/run/reboot-required?

  - by EdwardTeach

  On CentOS 5.8+ and Red Hat Enterprise 6+, when installing/updating packages, I notice a flag file /var/run/reboot-required is created when appropriate. On Ubuntu (and Debian too, I'm guessing), if package "update-notifier-common" is installed, a package postinst script triggers creation of this flag file. On RHEL/CentOS I can't figure out how this is happening. For instance, on RHEL and CentOS I recently installed several updates and /var/run/reboot-required was created. One of them was an "openssl" package upgrade. I assume this was what created the flag file, since on Ubuntu it also works this way. However I looked at all "rpm -q --scripts" for each updated package, and didn't see anything that was likely to have created that flag file. Mostly I saw "postinstall program: /sbin/ldconfig". So my questions are: What creates this flag file on RHEL/CentOS? Does it require a special package to be installed, analogous to the "update-notifier-common" package on Ubuntu?

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• How do I set up an IP address on a Linux VM running in VM Player so I can access it from my Windows 7 host?

  - by BradyKelly

  I have just installed an Openbravo appliance on my Windows 7 VM Player host. I am now staring at a command prompt that tells me to go to http://localhost to access the ERP system, but I cannot find any browser on the appliance. I am guessing I should rather follow their advice to configure an IP address for the Linux VM and just access that from a Windows browser on my host. How do I go about this? More specifically, How do I choose a local IP address to assign? How do I set things up so that this IP address is visible to my Windows host? Their help says to assign an DNS, to make the server visible to the internet, but internet visibility per se is not needed. How should I interpret or adapt this help for that? Finally to make the IP address available to the Internet, assign some DNS servers to it: $ echo "nameserver IP_DNS1" /etc/resolv.conf $ echo "nameserver IP_DNS2" /etc/resolv.conf

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