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  • Running Ubuntu with multiple monitors having a panel each

    - by Andreas Grech
    I have just installed Ubuntu and I'm trying to set up a correct configuration for having multiple monitors. I want the two monitors to have their own workspaces, yet the ability to drag a window from one monitor to the next. I also want a separate panel (taskbar) for each monitor. I have played around with nvidia-settings and tried the following different configs: Having both monitors `Use separate X screen" A panel for each monitor but I couldn't drag windows from one monitor to the next Using TwinView The ability to drag windows from one monitor to the next but only a single panel for the primary display Now I want to have the above configurations combined. Basically, as I stated beforehand, having a separate panel for each monitor and also the ability to drag windows across monitors. Can anyone provide me with suggestions please?

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  • How can I merge the gnome clipboard and the X selection?

    - by TREE
    I'm constantly frustrated by the two separate clipboards in X/Gnome. I'm constantly doing things like control-C to copy, and then middle-click to paste, and getting the wrong data. Or select something, then go where I want to paste it, and selecting what I want to paste over, only to lose my first selection! Is there any way to merge these two clipboards?

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  • Can not copy files after installing windows

    - by Ali
    I am experiencing a weird problem. I was running Xubuntu on my laptop until yesterday that I had to delete Xubuntu and install Windows. I had a NTFS partition on my Xubuntu that I kept some files on it. Today after installing windows I wanted to move all the files from that partition to an external HDD. I selected all files and folders and clicked on Copy, then I went to the HDD and clicked on paste but nothing happened. I can not do that. I do not know why. I copy the files, and wherever I click paste, nothing happens. If I try to copy the files and folders one by one, I can copy some of them, but some of them do not move. The other problem I have is that I can not open some files, in particular pdf files. When I click on pdf files I get this error: There was an error opening this document. This file cannot be found. Also, I cannot play some mp4 files. I can not open some jpg and txt files. I get this error The directory name is invalid. So in summary, after removing Xubuntu and installing windows 7 I have the following problems with one of the NTFS partitions on my internal drive: Can not copy or cut all folders and files from that partition to any other partition - I also do not get any errors. Can copy some folders and files Can not access some pdf, jpeg, txt and mp4 files and get the above errors. I should also mention I did not change anything for this partition during the installation or formatting the other partitions.

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  • How to re-add a RAID-10 failed drive on Ubuntu?

    - by thiesdiggity
    I have a problem that I can't seem to solve. We have a Ubuntu server setup with RAID-10 and two of the drives dropped out of the array. When I try to re-add them using the following command: mdadm --manage --re-add /dev/md2 /dev/sdc1 I get the following error message: mdadm: Cannot open /dev/sdc1: Device or resource busy When I do a "cat /proc/mdstat" I get the following: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [r$ md2 : active raid10 sdb1[0] sdd1[3] 1953519872 blocks 64K chunks 2 near-copies [4/2] [U__U] md1 : active raid1 sda2[0] sdc2[1] 468853696 blocks [2/2] [UU] md0 : active raid1 sda1[0] sdc1[1] 19530688 blocks [2/2] [UU] unused devices: <none> When I run "/sbin/mdadm --detail /dev/md2" I get the following: /dev/md2: Version : 00.90 Creation Time : Mon Sep 5 23:41:13 2011 Raid Level : raid10 Array Size : 1953519872 (1863.02 GiB 2000.40 GB) Used Dev Size : 976759936 (931.51 GiB 1000.20 GB) Raid Devices : 4 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Thu Oct 25 09:25:08 2012 State : active, degraded Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Layout : near=2, far=1 Chunk Size : 64K UUID : c6d87d27:aeefcb2e:d4453e2e:0b7266cb Events : 0.6688691 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 0 0 1 removed 2 0 0 2 removed 3 8 49 3 active sync /dev/sdd1 Output of df -h is: Filesystem Size Used Avail Use% Mounted on /dev/md1 441G 2.0G 416G 1% / none 32G 236K 32G 1% /dev tmpfs 32G 0 32G 0% /dev/shm none 32G 112K 32G 1% /var/run none 32G 0 32G 0% /var/lock none 32G 0 32G 0% /lib/init/rw tmpfs 64G 215M 63G 1% /mnt/vmware none 441G 2.0G 416G 1% /var/lib/ureadahead/debugfs /dev/mapper/RAID10VG-RAID10LV 1.8T 139G 1.6T 8% /mnt/RAID10 When I do a "fdisk -l" I can see all the drives needed for the RAID-10. The RAID-10 is part of the /dev/mapper, could that be the reason why the device is coming back as busy? Anyone have any suggestions on what I can try to get the drives back into the array? Any help would be greatly appreciated. Thanks!

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  • external disk suddenly unmounting

    - by hasen j
    Platform: Ubuntu 9.10 Disk Brand/model: WD My Book The external hard disk suddenly unmounts after a while. I suspect it's due to it "sleeping" to save power. I don't recall the problem having occurred before the upgrade to Karmic. How can this be fixed?

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  • Disadvantages of not having a swap partition

    - by Bo Tian
    I recently installed Ubuntu 10.04 on my laptop. Due to space constraint of the SSD, I did not set a swap partition for the OS, and I have 1.5GB of RAM. There's a warning during installation, but I think it's not a big deal since everything went smoothly. For the long term, would there be any drawbacks of not having a swap partition?

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  • Restrict SSH user to connection from one machine

    - by Jonathan
    During set-up of a home server (running Kubuntu 10.04), I created an admin user for performing administrative tasks that may require an unmounted home. This user has a home directory on the root partition of the box. The machine has an internet-facing SSH server, and I have restricted the set of users that can connect via SSH, but I would like to restrict it further by making admin only accessible from my laptop (or perhaps only from the local 192.168.1.0/24 range). I currently have only an AllowGroups ssh-users with myself and admin as members of the ssh-users group. What I want is something that works like you may expect this setup to work (but it doesn't): $ groups jonathan ... ssh-users $ groups admin ... ssh-restricted-users $ cat /etc/ssh/sshd_config ... AllowGroups ssh-users [email protected].* ... Is there a way to do this? I have also tried this, but it did not work (admin could still log in remotely): AllowUsers [email protected].* * AllowGroups ssh-users with admin a member of ssh-users. I would also be fine with only allowing admin to log in with a key, and disallowing password logins, but I could find no general setting for sshd; there is a setting that requires root logins to use a key, but not for general users.

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  • Connect a ssd externally such that hdparm is fully supported

    - by student
    I am just trying some hdparm magic with my new ssd (samsung 840 pro). However I don't want to change my drive over and over so it would be great if I could connect it externally to my laptop. I have a cheap sata-usb Adapter, but I feel it doesn't support the ATA commands send by hdparm. So what's the best way to do this? Are there sata-usb Adapters which fully support the hdparm things? Would it be a good idea to buy a sata-esata adapter to get full control over the drive?

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  • stunnel: SSL-to-SSL? (for smtp/imap)

    - by nonot1
    Hello, How can I configure stunnel to accpet SSL connections, and connect then to an SSL port on a different server? Here is my setup: Our ISP's server, "Mail Server", supports smtp/imap over SSL. (Not starttls. Just over ssl.) But, I have a bunch of client machines that will only trust a specific, internal, root certificate. Thus, they can not connect to "Mail Server". For these client machines, I'd like to make a dedicated "Mail Tunnel" host that uses stunnel to listen with an in-house signed SSL certificate, and just forward data to "Mail Server" using a 2nd SSL connection. Can this be done? What would be the specific steps for Ubuntu Server 10.10? (I'm not too familiar with persistent service configuration.) Thank you

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  • Gentoo on Mac Mini - can't get framebuffer to work

    - by user42055
    I have the latest Gentoo on an intel mac mini with 945G graphics. I'm trying to start X (with no config) but it complains that /dev/fb0 doesn't exist. I've tried adding the following options to the kernel boot params: video=intelfb:mode=800x600-32@60,accel,hwcursor vga=761 Because I read that the fb might not be enabled unless you set a vga= option. Unfortunately the kernel doesn't recognise that option. If I changed it to vga=ask it presents me a list of about 6 text modes no greater than 80x60. In the kernel I have agpgart, drm (using i830 module) and vga text console compiled in. What am I not doing right ?

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  • How can I port forward with iptables?

    - by stu
    I want connections coming in on ppp0 on port 8001 to route to 192.168.1.200 on eth0 on port 8080 I've got these two rules -A PREROUTING -p tcp -m tcp --dport 8001 -j DNAT --to-destination 192.168.1.200:8080 -A FORWARD -m state -p tcp -d 192.168.1.200 --dport 8080 --state NEW,ESTABLISHED,RELATED -j ACCEPT and it doesn't work, what am I missing?

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  • Gentoo on Mac Mini - can't get framebuffer to work

    - by user42055
    I have the last Gentoo on an intel mac mini with 945G graphics. I'm trying to start X (with no config) but it complains that /dev/fb0 doesn't exist. I've tried adding the following options to the kernel boot params: video=intelfb:mode=800x600-32@60,accel,hwcursor vga=761 Because I read that the fb might not be enabled unless you set a vga= option. Unfortunately the kernel doesn't recognise that option. If I changed it to vga=ask it presents me a list of about 6 text modes no greater than 80x60. In the kernel I have agpgart, drm (using i830 module) and vga text console compiled in. What am I not doing right ?

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  • How do i install apache on my ubuntu 12.04 where it has virtualhost

    - by YumYumYum
    According to the docs https://help.ubuntu.com/10.04/serverguide/httpd.html i have done following, and that is almost how i do always in my Fedora, but Ubuntu looks like its not working. a) DNS to IP $ echo "127.0.0.1 a" > /etc/hosts $ echo "127.0.0.1 b" > /etc/hosts b) Apache virtualhost $ ls 1 2 default default.backup default-ssl $ cat 1 <VirtualHost *:80> ServerName a ServerAlias a DocumentRoot /var/www/html/a/public <Directory /var/www/html/a/public> #AddDefaultCharset utf-8 DirectoryIndex index.php AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> $ cat 2 <VirtualHost *:80> ServerName b ServerAlias b DocumentRoot /var/www/html/b/public <Directory /var/www/html/b/public> #AddDefaultCharset utf-8 DirectoryIndex index.php AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> c) load into Apache and restart the service $ a2ensite 1 $ a2ensite 2 $ a2dissite default $ /etc/init.d/apache2 restart d) Browse the new 2 hosts $ firefox http://a Does not work it goes always with http://a or http://b to /var/www/html How do i fix it so that it goes to its own directory e.g: http://a goes to /var/www/html/a/public not /var/www/html?

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  • How to rename a BTRFS subvolume?

    - by hochl
    I have a BTRFS filesystem with a set of subvolumes in it. So far so good. I need to change the name of a subvolume, unfortunately the btrfs program does not allow me to rename a subvolume. Searching with Google has yielded some results, one said I can just mv, the other said I can just snapshot to a new name and delete the old subvolume. Before I crash my partition and have to reload it from the backup (it's quite large), my question is: What is the currently best way to rename a subvolume? Is it ok to just mv it, or will it invalidate some internal structures? Is making a new snapshot and removing the old subvolume the way to go, or has this some drawbacks? I know everything is still experimental, but for my purposes it has been working quite well (so far, and I have incremental backups for each day).

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  • Tomato/DD-WRT router to act as switch & only NAT some port

    - by fseto
    BACKGROUND: I have a device that must use a real IP address. Currently, my ISP uses DHCP and I can have up to 4 real IP address assigned. However, the cable modem only have 1 ethernet port and it's connected to my router (running Tomato, but can run DD-wrt or other Openwrt if required). Question stems from how I can connect the additional device, requiring a real IP? EASY SOLUTION: would be to get a switch and connect to the CM, Router, and Device. But alas, I want to avoid this route, since: my wiring cabinet in my home is drawing lots of power and heat already Device will be unprotected by any firewall unable to monitor the traffic to/from device. Besides, what would be the FUN in that? =) IDEA: So what I want to do is to configure the router, so that one of the switchport is removed from the normal br0 bridge. Instead, I want to make it behave like a switch on the WAN port. What's the best way of doing this? Should I create another bridge on the WAN & the device port? Can a single port belongs to two bridges? or would I need to create a subinterface first? Would I need a DHCP-relay? Am I expecting too much from my poor cheapie router? +------+ | CM | +--++--+ || +----WAN---------------+ | / \ Router | | BR1? BR0 | | | \ | | | {NAT} | | | / | | \ | +-P0----P1-P2-P3-Wifi--+ | +------+ |Device| +------+

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  • How can I setup a group writeable directory?

    - by meder
    $ whoami meder $ cd /var/www $ sudo mkdir html $ sudo groupadd web $ sudo usermod -a -G web meder $ sudo usermod -a -G web medertest $ sudo chown meder:web html $ sudo chmod -R g+rwx html The problem is, anytime I create a new file in /var/www/html even though the group is set to web, it is only writeable by the original user. I was given the advice of setting the umask to be 002 because the default is what causes the problems. But I would have to do this for all users in that group, and as far as I know it would be tedious having all of them modify ~/.bashrc to have umask 002. Even if I can do it myself with a shell command for all of those users, it still seems too tedious. Can anyone offer any advice on having a group writeable directory?

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  • switchover in postgresql

    - by user1010280
    I am using Postgresql 9.0 with Streaming replication. So, during switchover I follow these steps:- Get the server timestamp on primary. Get the current log position on primary. Set Verify Log location Verify Transaction Received Location Shutdown DB on production. Synchronize the transaction logs from PR to DR. Trigger a failover on the DR Database by creating the trigger file specified in recovery.conf Verify DB Mode on DR Copy the control file from from DR to primary. copy the temporary stats file from DR to primary. copy the history file from DR to primary. Create recovery.conf file. Start Database in standby mode in primary. Verify DB mode on PR At step (6), I have to copy last wal generated on Primary to standby and sync both PR and standby. but this thing takes time to copy files because this remote. So that postgres will keep seraching for wal for long time and after that it stops the server. So I want to know is there any way so that I can ask postgres to stop seraching or locating WAL after shutdown??? because postgres tries to locate this wal every 5 seconds. Please reply as soon as possible..its urgent...

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  • Serial converter - cat /dev/ttyUSB0 hangs on open

    - by Alex
    I am using Ubuntu 11.04 and attached a Garmin data cable. The device gets recognized [17718.502138] USB Serial support registered for pl2303 [17718.502181] pl2303 2-1:1.0: pl2303 converter detected [17718.513416] usb 2-1: pl2303 converter now attached to ttyUSB0 [17718.513443] usbcore: registered new interface driver pl2303 [17718.513446] pl2303: Prolific PL2303 USB to serial adaptor driver ... but when I do a strace cat /dev/ttyUSB0 it hangs on the open part and does not continue any more open("/dev/ttyUSB0", O_RDONLY|O_LARGEFILEC If I do the same on Ubuntu 12.04 it stops on fread(" ... ") which is okay, as there is currently no data comming in at this port. I am not sure if it is just a different configuration of the system or an driver related problem. How can I track this down further? Unfortunately I can not update the old Ubuntu 11.04 system for different reasons at the moment.

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  • Command to find the source package of a binary?

    - by Delan Azabani
    I know there's a which command, that echoes the full name of a binary (e.g. which sh). However, I'm fairly sure there's a command that echoes the package that provides a particular binary. Is there such a command? If so, what is it? I'd like to be able to run this: commandName ls and get coreutils for example.

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  • where are the "ipmi sel" entries parameter descriptions?

    - by Horatiu
    In order to troubleshoot a possible hardware issue I have installed ipmitools on my server and am doing queries for info related to poweron/poweroffs, hardware added/removed/status. I am trying to find some info on how to interpret sel obtained via ipmi sel list and the output looks like this : 72b4 | 10/31/2013 | 10:42:40 | System Event #0x01 | OEM System boot event | Asserted 72c8 | 10/31/2013 | 10:42:48 | System ACPI Power State #0x82 | S0/G0: working | Asserted I really want to know what "Asserted" means in this context, and also, where can I find a reference with all possible "exit status(es)" ? (Because I think that's what this is, right ?)

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  • subversion: enforce TLS

    - by Daniel Marschall
    Hello, I am running subversion on a Debian Squeeze system with Apache2 and mod_dav for viewing the contents with a webbrowser. I want to enforce the usage of TLS, so that the login data and the SVN contents cannot be read from the connection. I have tried following: <Location /svn> DAV svn SVNParentPath /daten/subversion/ # our access control policy AuthzSVNAccessFile /daten/subversion/access_control # try anonymous access first, resort to real # authentication if necessary. Satisfy Any Require valid-user # how to authenticate a user AuthType Basic AuthName "Subversion repository" AuthUserFile /daten/subversion/.htpasswd # Test SSLRequireSSL RewriteEngine On RewriteCond %{SERVER_PORT} !443 RewriteRule ^svn/(.)$ https://www.viathinksoft.de/svn/$1 [R,L] </Location> at file /etc/apache2/conf.d/subversion.conf Alas, this does not work. There is no redirect and there is still a HTTP request working at /svn/(projectname)/(somefolder) . This SSL-enforce-policy should work for - viewing the contents with webbrowser - retrieve contents with TurtoiseSVN client - committing contents with TurtoiseSVN client Can you please help me? Regards Daniel Marschall

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