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  • What are working xorg.conf settings for using a Matrox TripleHead2Go @ 5040x1050?

    - by Brendan Abel
    I'm trying to configure xorg.conf to correctly set the resolution of my screens. I'm using a matrox triplehead, so the monitor is a single 5040x1050 screen. Unfortunately, it's being incorrectly set to 3840x1024. Here is my xorg.conf: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 260.19.06 (buildd@yellow) Mon Oct 4 15:59:51 UTC 2010 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "Matrox" HorizSync 31.5 - 80.0 VertRefresh 57.0 - 75.0 #Option "DPMS" Modeline "5040x1050@60" 451.27 5040 5072 6784 6816 1050 1071 1081 1103 #Modeline "5040x1050@59" 441.28 5040 5072 6744 6776 1050 1071 1081 1103 #Modeline "5040x1050@57" 421.62 5040 5072 6672 6704 1050 1071 1081 1103 EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 9800 GTX+" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "5040x1050" SubSection "Display" Depth 24 EndSubSection EndSection

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  • How to query a DHCP server to get the local DNS servers

    - by Dan Berlyoung
    I have a ClarkConnect (CentOS based) box running as my home router on a RR connection. I had the DNS servers set up to use Google's DNS server. I want to change them back to the local DNS servers but I can't find an obvious/easy way to get those address short of a) reconfiguring the router's network to DHCP them (would rather not interrupt everyone) or b) calling their tech support (kill me now!). Is there a command line tool/command I can use to query the DHCP server on the external NIC to see what DNS servers it would set me up with w/o munging my existing setup?

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  • Postfix as mail relay for web servers?

    - by Ben Carleton
    Hi all, I want to set up Postfix to relay mail from a group of webservers. I would like to limit senders by IP so I can restrict the box to only my webservers, so I don't have an open relay and don't have to worry about authentication. So, what I guess I need is to limit inbound access but allow mail to be sent to any outbound address. I've looked through the docs and don't even know where to start, so any tips would be appreciated. Thanks!

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  • Ways to increase my Ubuntu partition space

    - by Andreas Grech
    I am currently running Ubuntu and Windows 7 as dual-boot on a single HD. The problem is that when I installed Ubuntu, I didn't allocate as much space as I thought I would need and now I need 'reinstall' Ubuntu so that I can increase the amount of storage space. Now there are two ways to go about this. Either I use use gparted to increase my partition space (but I read that it's not really that safe as regards data loss) or create the new partition with more space and reinstall Ubuntu there. But if want to reinstall Ubuntu, is there a way I can somehow "save" my current Ubuntu and install that one? What I mean is that I don't want to lose my current installed packages and files that I have on this partition. Is there a way to kind of maybe 'streamline' my current Ubuntu so that I install this one on the new partition? If not, what are your opinions as regards gparted?

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  • Killing all processes of current user

    - by Vi
    user@host$ killall -9 -u user Will it definitely kill all processes owned by user (including forkbombs)? No new processes is spawned to user from other users. No user's processes are in D-sleep and unkillable. No processes are trying to detect and ptrace or terminate this started killall. E.g. if killall will finish untampered and successfully is it 100% that no processes are left with this uid?

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  • Accidentally dd'ed an image to wrong drive / overwrote partition table + NTFS partition start

    - by Kento Locatelli
    I screwed up and set the wrong output for dd when trying to copy a freenas iso, overwriting the wrong external hard drive. Ironically, I was trying to setup a freenas server for data backup... External drive is only used for data storage, system is entirely intact Drive had a single NTFS partition filing the entire device (2TB WD elements) Drive originally had an MBR partition table. Drive now shows as having a GPT, presumably from the freenas image. Drive was mounted at the time, with maybe a couple kB of data written/read after running dd Drive is just a few months old and healthy (regular SMART / fs checks) I have not reboot the OS (crunchbang) /proc/partition still holds the correct information (and has been stored) Have dd's output (records in / out / bytes) testdrive did not find any partitions on quick or deep search running photorec to recover the more important data (a couple recent plaintext files that hadn't been backed up yet). Vast majority of disk content ( 80%) is unnecessary media files. My current plan is to let photorec do it's thing, then recreate the mbr with gparted and use cfdisk to create another NTFS partition using the sector information from /sys/block/.../. Is that a good course of action (that is, a chance of success)? Or anything else I should try first? Possibly relevant information: dd if=FreeNAS-8.0.4-RELEASE-p3-x86.iso of=/dev/sdc: 194568+0 records in 194568+0 records out 99618816 bytes (100 MB) copied grep . /sys/block/sdc/sdc*/{start,size}: /sys/block/sdc/sdc1/start:2048 /sys/block/sdc/sdc1/size:3907022848 cat /proc/partitions: major minor #blocks name ** Snipped ** 8 32 1953512448 sdc 8 33 1953511424 sdc1 current fdisk -l output: WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdc: 2000.4 GB, 2000396746752 bytes 255 heads, 63 sectors/track, 243201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdc doesn't contain a valid partition table

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  • How to set TV-out options under Linux of an Geforce 9600 GT video card

    - by polemon
    I'm using the TV-out connector of my Geforce 9600 GT to connect it to an old TV set. It's obviously in Composite mode, the other two cables of Component video are dead, only Pb/VIDEO labeled one gives me a signal. The picture appears black/white on the TV, I presume it's because the video card gives me an NTSC signal, but it's a PAL tv set. How do I change the TV-out from NTSC to PAL? My Component to SCART adapter hasn't arrived yet, but I think I should be able to set manually, whether the signal should be Composite or Component. How do I switch modes of the TV-out, between Component and Composite? I'm running Linux, so it's probably some settings I need to make in xorg.conf. Edit: I got this far: I need to set in the "Device" section of my xorg.conf: Option "TVStandard" "PAL-B" Option "TVOutFormat" "COMPOSITE" The whole section looks like this now: Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 9600 GT" Option "AddARGBGLXVisuals" "True" Option "TVStandard" "PAL-B" Option "TVOutFormat" "COMPOSITE" EndSection How can I list all available settings for "TVStandard" and "TVOutFormat"?

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  • How to connect to a remote server and run some code on that particular server?

    - by seedeg
    I am implementing an automated backup scheme so I created a shell script which first creates SQL Dumps for all MySQL databases, then it retrieves all the websites from the /var/www of a remote server. The latter is working as I am using rsync to get the remote files. However, obviously, the MySQL dumps being retrieved are the ones on the local server which is not what I want. I want to get the SQL Dumps from the remote server as well. I have a tunnel between the local and remote server which I can connect without using any password (I added the public key to the authorized_hosts), so I tried to add the following code to the script: ssh [email protected] Then I tried to retrieve the SQL dumps and then I exit from the remote server. However this does not work as I still have to enter exit manually in the terminal for the SQL dumps to be retrieved from the remote host. I don't know why this is happening. Basically this is what the script is trying to do: //connect to remote server ssh [email protected] //retrieve SQL dumps //code to retrieve... //exit from remote server exit //use rsync to get remote files of /var/www from local server (working) Is there a way to connect to the remote host AND run the script's code ON THAT remote host? Many thanks in advance

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  • Lubuntu LiveCD disabling auto-mount.

    - by PxE Booter
    In cooperation with my IT teacher we want to boot all PC's in IT class with Lubuntu. I've successfully set up PXE server, but there is one thing that worries us. Harddrives shouldn't be accessible from booted Lubuntu(normal user only). Would adding to fstab something like: /dev/sda1 /Idk/What auto noauto work? I'd like to add that I can uncompress squashfs livecd filesystem. If no, what other solution is there, to block auto-mounting /dev/sda drive?

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  • killing all instances of chrome on the command line?

    - by Fedor
    In some cases killing a single tab/process doesn't do it and I need to close Chrome entirely. Since Chrome has multiple processes, how can I close all of them at once? I know that... pgrep chrome returns all the pids, can someone tell me a trick that would allow me to close all of them by feeding them to another command or merging them to a csv or something?

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  • Find and Replace String in filenames

    - by shekhar
    I have thousands of files with no specific extensions. What I need to do is to search for a sting in filename and replace with other string and further search for second string and replace with any other string and so on. I.e.: I have multiple strings to replace with other multiple strings. It may be like: "abc" in filename replaced with "def" * String "abc" may be in many files "jkl" in filename replaced with "srt" * String "jkl" may be in many files "pqr" in filename replaced with "xyz" * String "pqr" may be in many files I am currently using excel macro to get the file names in excel and then preserving original names in one column and replacing desired in the content copied in other column. then I create a batch file for the same. Like: rename Path\OriginalName1 NewName1 rename Path\OriginalName2 NewName2 Problem with the above procedure is that it takes a lot of time as the files are many. And As I am using excel 2003 there is limitation on number of rows as well. I need a script in batch like: replacestr abc with def replacestr pqr with xyz in a single directory. Will it be better to do in unix script?

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  • System time wrong after running ntpdate because DST ignored

    - by Ian Dunn
    When I run ntpdate, my system clock displays the time as an hour behind what it should be. I know that ntpdate does everything in UTC, so I'm guessing there's a timezone setting wrong and it's ignoring Daylight Savings Time, but I can't figure it out. Here's what I've done so far: ln -sf /usr/share/zoneinfo/EST /etc/localtime to set the timezone Set UTC=true in /etc/sysconfig/clock so that DST will be automatically applied date -s hh:mm::ss to set system clock correctly hwclock -systohc --utc to set the hardware clock correctly At this point date and hwclock both display the correct time. But if I then run ntpdate 0.us.pool.ntp.org, the date output is an hour behind what it should be. I've looked at a dozen tutorials and can't figure out what I'm doing wrong. Does anyone have any ideas?

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  • How to determine the best byte size for the dd command

    - by James
    I know that doing a dd if=/dev/hda of=/dev/hdb does a deep hard drive copy. I've heard that people have been able to speed up the process by increasing the number of bytes that are read and written at a time (512) with the "bs" option. People have suggested that the optimal byte size is due to sector size. I personally think it would have something to do with the amount of cache that the hard drive has. My question is: What determines the ideal byte size for copying from a hard drive? and Why does that determine the ideal byte size?

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  • Raid1 with active and spare partition

    - by Daniel Baron
    I am having the following problem with a RAID1 software raid partition on my Ubuntu system (10.04 LTS, 2.6.32-24-server in case it matters). One of my disks (sdb5) reported I/O errors and was therefore marked faulty in the array. The array was then degraded with one active device. Hence, I replaced the harddisk, cloned the partition table and added all new partitions to my raid arrays. After syncing all partitions ended up fine, having 2 active devices - except one of them. The partition which reported the faulty disk before, however, did not include the new partition as an active device but as a spare disk: md3 : active raid1 sdb5[2] sda5[1] 4881344 blocks [2/1] [_U] A detailed look reveals: root@server:~# mdadm --detail /dev/md3 [...] Number Major Minor RaidDevice State 2 8 21 0 spare rebuilding /dev/sdb5 1 8 5 1 active sync /dev/sda5 So here is the question: How do I tell my raid to turn the spare disk into an active one? And why has it been added as a spare device? Recreating or reassembling the array is not an option, because it is my root partition. And I can not find any hints to that subject in the Software Raid HOWTO. Any help would be appreciated. Current Solution I found a solution to my problem, but I am not sure that this is the actual way to do it. Having a closer look at my raid I found that sdb5 was always listed as a spare device: mdadm --examine /dev/sdb5 [...] Number Major Minor RaidDevice State this 2 8 21 2 spare /dev/sdb5 0 0 0 0 0 removed 1 1 8 5 1 active sync /dev/sda5 2 2 8 21 2 spare /dev/sdb5 so readding the device sdb5 to the array md3 always ended up in adding the device as a spare. Finally I just recreated the array mdadm --create /dev/md3 --level=1 -n2 -x0 /dev/sda5 /dev/sdb5 which worked. But the question remains open for me: Is there a better way to manipulate the summaries in the superblock and to tell the array to turn sdb5 from a spare disk to an active disk? I am still curious for an answer.

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  • shinken/nagios discriminative between warning alert and critical alert

    - by SWdream
    i using shinken for my monitoring system. Now, i have a problem when i configure shinken notification. My purpose is to discriminative between notification for warning state and critical state of check service: with warning state: + time to send alert from 8h = 18 h everyday, via email and sms + notification_interval is 60 minutes (Re-notify about service problems every hour) with critical state: + time to send alert : all time (24 x 7), via email and sms + notification_interval is 30 minutes Please show me how to solve my problem! I have tried the following: i configured: + contact templates: define contact{ name warning-contact ; The name of this contact template register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL CONTACT, JUST A TEMPLATE! host_notifications_enabled 1 define contact{ service_notifications_enabled 1 email shinken@localhost can_submit_commands 1 notificationways email_warning, sms_warning } define contact{ name critical-contact ; The name of this contact template register 0 ; DONT REGISTER THIS DEFINITION - ITS NOT A REAL CONTACT, JUST A TEMPLATE! host_notifications_enabled 1 service_notifications_enabled 1 email shinken@localhost can_submit_commands 1 notificationways email_critical, sms_critical } + time poriod templates: define timeperiod{ timeperiod_name warning alias Normal Work Hours monday 08:00-18:00 tuesday 08:00-18:00 wednesday 08:00-18:00 thursday 08:00-18:00 friday 08:00-18:00 saturday 08:00-18:00 sunday 08:00-18:00 #exclude 24x7 } define timeperiod{ timeperiod_name 24x7 alias 24_Hours_A_Day,_7_Days_A_Week sunday 00:00-24:00 monday 00:00-24:00 tuesday 00:00-24:00 wednesday 00:00-24:00 thursday 00:00-24:00 friday 00:00-24:00 saturday 00:00-24:00 #exclude workhours } + notification way templates: define notificationway{ notificationway_name email_warning service_notification_period warning host_notification_period warning service_notification_options w host_notification_options d,u,r,f,s notification_interval 60 ; Resend notifications every 30 minutes service_notification_commands notify-service-by-email ; send service notifications via email host_notification_commands notify-host-by-email ; send host notifications via email } define notificationway{ notificationway_name email_critical service_notification_period 24x7 host_notification_period 24x7 service_notification_options c,r host_notification_options d,u,r,f,s notification_interval 30 ; Resend notifications every 30 minutes service_notification_commands notify-service-by-email ; send service notifications via email host_notification_commands notify-host-by-email ; send host notifications via email } define notificationway{ notificationway_name sms_warning service_notification_period warning host_notification_period warning service_notification_options w host_notification_options d,u,r,f,s notification_interval 60 ; Resend notifications every 30 minutes service_notification_commands notify-service-by-sms ; send service notifications via sms host_notification_commands notify-host-by-sms ; send host notifications via sms } define notificationway{ notificationway_name sms_critical service_notification_period 24x7 host_notification_period 24x7 service_notification_options c,r host_notification_options d,u,r,f,s notification_interval 30 ; Resend notifications every 30 minutes service_notification_commands notify-service-by-sms ; send service notifications via sms host_notification_commands notify-host-by-sms ; send host notifications via sms } + my contacts define contact{ use warning-contact contact_name thanhwarn email xxxx pager xxxx ; contact phone number } define contact{ use critical-contact contact_name thanhcritical email xxxxx pager 01689xxxx ; contact phone number } + and define service: define service{ use generic-service service_description check_ram host_name graphite contacts thanhcritical, thanhwarn check_command check_nrpe!check_ram } but my shinken system don't send alert. i don't understand this. please show me where I went wrong! thanks all!

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  • How to place a virtual machine in DMZ?

    - by Giordano
    I have an Ubuntu 12.04 server running few virtual machines with KVM. I would like to expose some of these virtual machines on the internet, to make it possible for customers to test the products we're developing and make available other products for demo purposes. One of the server NICs is configured with a public IP. However before exposing anything on the web I would like to be sure that if one of the virtual machines get compromised, the attacker doesn't reach the rest of the hosts. What I would like to do is to put these virtual machines into a DMZ. These are the steps I'm planning to do: Create a tap interface in the virtualization host (let's say tap1) Create a bridge using tap1 and give it an IP in a subnet separate from the other hosts. Let's say 10.0.0.1 Attach the DMZ virtual machines to the bridge and configure their IP statically (10.0.0.2, 10.0.0.3, etc...) Using UFW, forbid any traffic from 10.0.0.0/24 to any of the internal hosts, allow the traffic from the internal hosts towards 10.0.0.0/24 and expose the virtual machines on the web using port forwarding. Do you think this setup is safe? Can you suggest any improvement or a better/safer approach? Thanks in advance!

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  • AutoMatically Creating New Sites When New Users Sign Up

    - by Eddy Freeman
    I would like to know how hosted eCommerce sites like www.shopify.com, www.3dCart.com etc.. automatically creates new sites when new users sign up. What kind of tools do they use to create those sites into the users profile. I have tried googling but couldn't find an answer. Does any of you guys have any knowledge or experience that you can share with me? Or do you know a tutorial that you can point me to? I hope my question is clear. Thanks for your help.

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  • How can I register a custom protocol with xdg?

    - by julien
    I've been struggling this morning trying to associate an application with a custom protocol, namely emacsclient and org-protocol. I'm calling this protocol from a webbrowser bookmarklet, and I get the following behaviour : In chromium, the "Launch Application" dialog comes up, and calls xdg-open org-protocol://... which ends up firing a new chromium frame. In firefox, I've tried setting network.protocol-handler.app.org-protocol to an empty string or my emacsclient path, anyhow I get the following error message : "Firefox doesn't know how to open this address, because the protocol (org-protocol) isn't associated with any program" without even showing any external application selection dialog. I'm not using any desktop environment, so I need to make this work strictly with xdg, however, despite reading the shared mime info spec etc, I still can't fathom a working configuration.

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  • sshd: How to enable PAM authentication for specific users under

    - by Brad
    I am using sshd, and allow logins with public key authentication. I want to allow select users to log in with a PAM two-factor authentication module. Is there any way I can allow PAM two-factor authentication for a specifc user? I don't want users - By the same token - I only want to enable password authentication for specific accounts. I want my SSH daemon to reject the password authentication attempts to thwart would-be hackers into thinking that I will not accept password authentication - except for the case in which someone knows my heavily guarded secret account, which is password enabled. I want to do this for cases in which my SSH clients will not let me do either secret key, or two-factor authentication.

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  • Ubuntu server; Backup of server and MySql database, and Solr database

    - by Camran
    How is backup done on ubuntu servers? I have a server (Ubuntu 9.10) which has apache2 installed, php5, mysql etc... The website is a classifieds website where all classifieds are stored in mysql and Solr. I need to backup this server with all information to be able to fully restore it if something goes wrong. How should I start? Is it an automated task, or will I do backups manually? (prefer manually) Thanks

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  • How to kill user processes from the same user?

    - by Grey
    I opened a VNC server and my VNC session is suddenly dead. I have lot of xterms open. When I ssh to the machine. and type users I see a bunch of users – my user accounts, like: userA UserA UserA UserA UserA UserA UserA I know I can use pkill -u usersname Since I can only log in as userA, every time I run pkill-u UserA, it will just kill my current session. but other userAs are still there What can I do?

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