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• Linus Torvalds qualifie le disque dur de "Satan", le père du noyau Linux critique la latence du support de stockage

  Linus Torvalds qualifie le disque dur de « Satan » le père du noyau Linux critique la latence du support de stockage et opte pour les mémoires Flash Linus Torvalds n'a pas la langue dans sa poche. Le créateur du noyau Linux vient une fois de plus de faire l'une de ses déclarations qui lui sont caractéristiques, lors d'un entretien avec les amateurs de technologie du blog Slashdot. Après avoir qualifié les développeurs du système d'exploitation OpenSuse de « crétin » et plus récemment le fabricant Nvidia de « pire société ayant travaillé avec la fondation Linux », Torvalds a déversé son courroux sur les disques dur...

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• "service"-command and environment variables

  - by varesa

  I am trying to start a service that requires a env. variable to be set to certain path. I set this variable in "/etc/profile.d/". However when I start this service using the service command, it doesn't work. man service: service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. So it seems that service is removing my variables. How should I set the variables up to keep them from being removed. Or is that something i should not do. I could start the service manually using the init-scripts, or even hardcode the path into the script, but I'd like to know how to use it with the service command.

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• I removed Ubuntu from the BIOS menu but it comes back.

  - by jimirings

  For reasons too long to explain, I reluctantly removed Ubuntu from my computer. After completely removing it and deleting the partition that it was installed onto, I discovered that I still had two Ubuntu entries in the boot order in my BIOS menu. I deleted them by following the instructions in this answer: http://askubuntu.com/a/63613/54934 As I was doing it, everything appeared to go smoothly. However, upon reboot one of them came back. What's going on here? How do I delete it permanently? I'll gladly provide any other information that may be needed to diagnose the problem. Thanks.

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• Mint 13 does nothing when laptop lid is closed

  - by ewok

  I have a laptop running Mint 13. I have it hooked up to a 30" monitor and have no use for the laptop being open, so I put it on a shelf and close it. When I do that, the monitor goes blank. The power manager does not have an option for doing nothing when the lid is closed. The options are "Blank Screen", "Suspend", and "Shutdown". Is there a way to make the laptop not go to a blank screen when the lid is closed?

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• stat and ls show wrong file size (terabytes wrong)

  - by WolleTD

  Ok, I have a bunch of vCard files, all about 200 to 300 Bytes in size. While trying to get them archived, I wondered why that takes so long and discovered that there is one file with a wrong size. Both ls and stat are showing a size of about 8.1 Terabytes. That's amazing because my SSD is only about 250 Gigabytes in size. There are some other files with wrong sizes, too, but this is clearly the biggest one. I already gave it a fsck, but there seem to be no errors in the (ext4) filesystem. How can I get rid of this wrong size? Thanks, Wolle

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• Will Ubuntu be releasing an update for Cedar Trail Processors?

  - by Alan

  There is a file available on the Intel web site with the file name "cdv-gfx-drivers-1.0.1_bee.tar.bz2" and a date of July 6, 2012. It can be found by searching the Intel Download Center for the filename or the string "Linux* PowerVR Graphics/Media Drivers". The download page links to the file, release notes and a link, Enabling hardware accelerated playback that takes one to a page containing links to two pdf documents titled "Enabling Hardware Accelerated Playback for Intel® AtomTM Processor N2000/D2000 Series", one for Ubuntu and one for Fedora. The instruction and release notes speak to working with kernel 3.1.0 and since I do not feel I have the skills, knowledge or training to do anything else but, follow the instructions to the "T", I am very reluctant to try anything on my freshly updated 3.2.0 kernel. I would much rather use a Ubuntu supported kernel that applies these drivers and doesn't break anything in the process. Is it a case where this is so new that Canonical has not yet included these drivers but, soon will do so?

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• Tracing out going connections

  - by Tiffany Walker

  Jan 24 07:00:49 HOST kernel: [875997.380464] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18789 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 Jan 24 07:00:50 HOST kernel: [875998.378321] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18790 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 I run fcgid so everything runs as a user. But is there a way to trace and figure out who is running an out going script? The sites all share the same IP so it's hard to know which site it is or where the script is located at.

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• My server keeps sending emails to [email protected]

  - by xtrimsky

  When I type mailq on my server, I get: BB523653A62 4025 Wed Jun 4 10:40:07 MAILER-DAEMON (delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout002.prod.phx3.secureserver.net : DED : AJeb1o0334uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS) [email protected] B33AD653A4A 4025 Wed Jun 4 08:20:07 MAILER-DAEMON (delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout002.prod.phx3.secureserver.net : DED : AJeb1o0334uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS) [email protected] B77DF653A63 4025 Wed Jun 4 10:50:07 MAILER-DAEMON (delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout001.prod.phx3.secureserver.net : DED : AJvF1o00L4uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS) [email protected] B943C653A3C 4025 Wed Jun 4 06:40:07 MAILER-DAEMON (delivery temporarily suspended: host p3smtpout.secureserver.net[208.109.80.54] refused to talk to me: 554 p3plsmtpout001.prod.phx3.secureserver.net : DED : AKBv1o00P4uf1Y801 : DED : You've reached your daily relay quota - IP.ADDRESS) [email protected] (there is probably about 50 of these, and I've cleared the queue today), do you know where these could be coming from ? is it my server sending some logs to "hostmaster" ? I've replaced my actual domain, with "MYDOMAIN". How can I find what could be sending these emails ? The server has recently been hacked so I'm also a bit worried. Thanks!

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• How to safely use grub rescue> in Fedora 16? System does not boot anymore

  - by YumYumYum

  When i boot my PC, i get this in my Fedora 16 distro. I have tried as following but none allowing me to boot anymore. Any help please? I am blocked completely. Grub loading. Welcome to GRUB! error: file not found. Entering rescue mode... grub rescue> grub rescue> ls (hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) grub rescue> ls (hd0,gpt2)/ ./ ../ lost+found/ memtest86+-4.20 grub2/ System.map-3.1.0-0.rc3.git0.0.fc16.i686 config 3.1.0.0.rc3.git0.0.fc16.i686 grub/ vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686 elf-memtest86+-4.20 initramfs-3.1.0.0.rc3.git0.0.fc16.i686.img initramfs-3.1.0.0.rc4.git0.0.fc16.i686.img System.mpa-3.1.0.0.rc3.git0.0.fc16.i686 config-3.1.0.0.rc3.git0.0.fc16.i686 vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686 grub rescue> set prefix=(hd0,gpt2)/boot/grub grub rescue> set root=(hd0,gpt2) grub rescue>insmod normal error unknown filesystem. or sometimes "error: file not found." grub rescue>normal unknown command normal

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• Make a socket as an user but make it readable and writable by another

  - by user1598585

  I have a software that is run under user A, this software creates a socket in /sockets and the socket should be readable and writable by user B. I have tried setting the directory to have ownership A:A or A:B but when user A creates the socket, it ends up with uid A and gid A. Using ACLs has not helped so far, the default mask is preventing the rights to be effective. rw permisions for B will always turn into jusr r. If what I make is not a socket it will work fine. How can I best accomplish this task? (It is for a web-server where the web-application makes the socket and the web-server software forwards requests to it)

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• How to open port 25 on the server

  - by liuxingruo

  I'm using centOS. I want to implement a smtp mail server, and I have installed postfix and dovecot(both have been set correctly). I tried to telnet the 25 port, but it returns Unable to connect to remote host: Connection refused So, How can I open the 25 port? Thanks!

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• Interested in scp recipe for sftp [closed]

  - by GJZ

  You wrote in a reply this Blockquote The problem is that sftp runs as the user's id -- first, the sftp client ssh's into the target host as the given user, then runs sftp-server. Since sftp-server is running as a regular user, it has no way to "give away" a file (change owner of a file). However, if you are able to use scp, and assign a key pair to each user, you can get around this. This involves adding a user's key to root's ~/.ssh/authorized_keys file, with a "command=" parameter to force it to run a script that sanitizes and alters the arguments of the server-side scp program. I've used this technique before to set up an anonymous scp dropbox that allowed anyone to submit a file, and ensure that no one could retrieve submitted files and also prevent overwrites. If you are open to this technique, let me know and I'll update this post with a quick recipe. We are interested in this scp quick recipe for our community services file sharing. Best Regards, Gert Jan Zeilstra

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• solaris + why cant ping to default getway

  - by yael

  I have Solaris machine with IP 10.10.10.100 and default getway 10.10.10.1 and subnet 255.255.255.0 remark - solaris machine connected to cisco switch via cross cable and from switch to my laptop I configure my laptop to connect to my Solaris machine so my laptop IP is 10.10.10.1 and subnet 255.255.255.0 but something not clearly I have ssh connection from my laptop to my Solaris machine ( I mean I in my solaris machine ) but from Solaris machine I can do ping to 10.10.10.1 ? ( how it can be ??? ) please advice why?

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• Migrating to ssh key authentication; implications of adding sbin's to users $PATH

  - by ancillary

  I'm in the process of migrating to key's for authentication on my CentOS boxes. I have it all set up and working, but was a bit taken aback when I noticed service (and other things) didn't work the way I was accustomed to. Even after su'ing to root, still had to call the full path for it to work (which I assume to be expected/normal behavior). I also assume this is because there are different $PATH's for root (what I was using and am used to) and the newly created, key-using user. Specifically, I noticed the sbin's of the world missing from the user path. If I were to add those paths (/sbin/,/usr/sbin/,/usr/local/sbin) to a profile.d .sh script for this new key-loving user, would: I be opening up the system in ways I shouldn't be? I be doing something I needn't do save for reasons of laziness? I create other potential problems? Thanks.

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• Server not resolving after restart

  - by DomainSoil

  I restarted our server today, and now cannot for the life of me get anything to resolve... I suspect it has something to do with our routes. I've tried numerous Google results to no avail. Here is as far as I've gotten: [root@www ~]# route -n Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.101 0.0.0.0 255.255.255.255 UH 0 0 0 eth1 0.0.0.0 192.168.1.101 0.0.0.0 UG 0 0 0 eth1 Things you need to know: Our server (CentOS 6.3) runs two virtual machines, one live, and one development. They mirror each other as much as possible, but I can't find where I've went wrong with the live server. The dev server works fine. [root@www ~]# ifconfig eth1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx inet6 addr: xxxx:xxx:xxxx:xxxx:xxxx/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:118206 errors:0 dropped:0 overruns:0 frame:0 TX packets:165 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7825749 (7.4 Mib) TX bytes:7146 (69.2 KiB) Interrupt:28 [root@www ~]# /etc/init.d/network status Configured devices: lo Auto eth0 Currently active devices: lo eth1 If there is any other information you need, please don't hesitate to ask!

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• Creating rescue / install USB flash disk for CentOS

  - by wwwpanda

  For CentOS installation CDs, you can install OS, as well as booting into "rescue" mode so that you can do a chroot mount on the system partition for problem solving, even the system is installed in hardware RAID drives. How can we create a similar thing but on usb flash drive? I tried to do it with unetbootin, but when booting into the USB, eventually the CentOS setup still requires presence of CDs. Ultimately, I want to use this usb flash drive for remote disaster recovery through say HP iLo remote console / Dell iDrac etc.

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• Ubuntu 10.10 booting but not rebooting from external USB hard drive, what could be the problem?

  - by user8276

  I have a Dell Inspiron 6400 laptop with a dead internal hard drive controller. It boots perfectly from CD or USB. I therefore removed the internal hard drive and installed Ubuntu 10.10 Maverick onto an external USB hard drive. It boots and runs perfectly when doing a "cold start" of the PC. However, when I choose restart/reboot in the Ubuntu menu (e.g. after an update), I get this error message from the BIOS: "No bootable devices, strike f1 to retry boot, f2 for setup utility, press f5 to run onboard diagnostics". I can make the system boot again by pressing f2 or f5 and exiting the utility without having done anything. Or, I can simply power off the system and do a new "cold start". Does anyone know the likely reason for this problem and how to fix it. It is not a big issue but an annoyance that I would like to fix if possible.

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• What's the reason to break HDD to few partitions for MDADM+LVM2?

  - by archer

  I'm using 2 HDDs each 1TB in size. I'm going to create MDADM+LVM2 over them. Initially I though about this partition layout: /dev/sda1 - 1Gb (boot) /dev/sda2 - 500Gb (md0) /dev/sda3 - 499Gb (md1) /dev/sdb1 - 1Gb (boot) /dev/sdb2 - 500Gb (md0) /dev/sdb3 - 499Gb (md1) md0 is going to be raid0 and md1 is going to be raid1 however, I found some info that this would be better to break each drive to more partitions (lets say 10 partitions 100Gb in size each). What's the reason of doing that?

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• /etc/rc.local doesn't execute apache tomcat startup script on boot

  - by user119720

  I'm having some problem with my centOS machine.I want to insert a line inside the rc.local to execute apache tomcat on startup. Below are the configuration for /etc/rc.local #!/bin/sh # # This script will be executed *after* all the other init scripts. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local /opt/apache-jakarta/bin/startup.sh Unfortunately,the apache tomcat does not start on the boot time. I've already execute the script manually and it is working without any issues. Is there any specific syntax to put script inside the rc.local?Or did I forgetting something?Please Advice.Thanks. EDIT: My boot.log only show this output: Dec 17 21:04:53 localhost NET[2969]: /sbin/dhclient-script : updated /etc/resolv.conf

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• Combat server downtime by duplicating server and re-routing when main server is down

  - by Wasim

  I have a CentOS server which at times either crashes or gets attacked with DDOS. At the moment I have an off site backup which is filled up with 1.7TB of data. I'm currently paying as much for the backup as I am for the server and I was looking for advice from experienced people as to what option is best to proceed from here. Would it be a viable solution to ditch the offsite backup, and instead purchase an additional server which is an exact duplication of the first server. So if the first server is down, users are re-routed to the second server without noticing the first server is even down. This would create an automatic backup of the first server (albeit not offsite) and relinquish the need for the expensive offsite backup. Is the above solution a true solution to pricey backup or is offsite backup absolutely necessary? How would I go about doing this (obviously it's pretty complex so just links to some reading material or the terminology of the procedure would be great)? Appreciate the help and advice.

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• One Year Later: What Do You Think of Linux.com?

  <b>Linux.com:</B> "This month marks the one-year anniversary of Linux.com in its newest form. A year ago, we built the site based on your rankings of features on IdeaForge. Today, we want to hear how you're using Linux.com and what is most useful"

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• Recommendations for a PDF reader with a "web browser"-like navigation.

  - by Tshepang

  Am looking for a PDF reader that can navigate PDF files like a web browser (IE, when I click a link that takes me to another part of the doc, I should be able to go back by pressing Ctrl+left arrow). I am using Debian.

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• How do I remove Ubuntu from a dual-boot Windows 7 laptop?

  - by Alex

  Im new to Ubuntu and liked it a lot! however after testing it on my old crappy laptop i now want to remove it. Ive looked at tutorials on how to uninstall and it says to start by deleting the linux partition of the hard drive.however after opening Computer management, I cannot locate my linux partition. same as when I go to System Configuration, and click on the "boot" tab, my computer does not list any operating system other than Windows 7. Any Way around this or perhaps a different way to uninstall?

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• How to get Postfix to send/forward/relay to a sub-domain located on another server?

  - by thiesdiggity

  I have a quick question. How do I setup postfix to send an email to another server (Exchange Server) when sending to an email address that has a sub-domain of our main server. For example, say our main server is mail.example.com and we have a Exchange server setup to receive emails from exchange.example.com. We have the MX records setup in our DNS and it receives correctly if we send from a GMail account. However, when we try to send an email from a @example.com account we get the following error: Host or domain name not found. Name service error for name=exchange.example.com type=A: Host not found I believe Postfix checks for local mailboxes first and if its setup with the domain it delivers to the local account, but in this case the sub-domain accounts are located in another server. Anyone have any thoughts on what I need to do within Postfix so it doesn't look locally for the exchange.example.com mailboxes? I found relay_domains directive within Postfix but that doesn't seem to fix it when I add the sub-domain. Thanks for your help.

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• When using gt5 in my home directory I get a blank page.

  - by MT

  When using gt5 in various directories on my system (including my home directory) I get blank results. If I limit the max-depth enough, I get results. For example, in my home directory 'gt5 --max-depth 2' produces a listing, while 'gt5 --max-depth 3' produces a blank page. I've noticed that the temporary html file that gets created in tmp (such as '/tmp/gt5.9035.kJVM08Y9/gt5.html' is a zero-byte file. I can successfully do a du in the same directory (which is what I thought gt5 was using), so I'm not sure what to check?

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