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• Disabling shutdown command for all users, even root - consequences?

  - by Rich

  I would like to disable the shutdown command for all users, even root, on an Ubuntu Server installation. The reason I want to do this is to ensure that I don't get into the habit of shutting down the machine in this way, as I SSH into a lot of production machines at the same time as this one, and I don't want to accidentally shutdown one of the other machines by typing the command into the wrong window. The server I want do disable shutdown on only runs inside VirtualBox on my Windows desktop, and I only use it for local testing so it is not a problem if I can't shut it down from the command line. I have already mitigated the problem a bit by ensuring I have a different password on the VirtualBox image, but obviously if I am within the sudo 'window' on one of the production machines, I could still accidentally shut it down. My questions are: How do I disable the shutdown command? If I do disable the shutdown command, are there any consequences that I should be made aware of? Most specifically, will it disable support for ACPI shutdown that is the equivalent of pressing the power button on a physical machine? Could it affect other generic applications? For information, I just use this VirtualBox image for trying out shell scripts, running Tomcat and Java, and that kind of thing.

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• Automatizing the backup of my databases and files with cron

  - by Patrick

  hi, I want to automatize the backup of my databases and files with cron. Should I add the following lines to crontab ? mysqldump -u root -pPASSWORD database_name | gzip > /home/backup/database_`date +\%m-\%d-\%Y`.sql.gz svn commit -m "Committing the working copy containing the database dump" 1) First of all, is this a good approach? 2) It is not clear how to specify the repository and the working copy with svn. 3) How can I run svn only when the mysqldump is done and not before ? Avoiding conflicts Any other tip ? thanks

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• Display brightness adjustment not working

  - by nibot

  I have Ubuntu 11.04 installed on a Lenovo Thinkpad T410 laptop with nVidia GT218 display controller. I am unable to adjust the display brightness. Pressing Fn-Home and Fn-End brings up the display brightness on-screen display and the indicated level increases or decreases as it should. But the actual display brightness does not change. Earlier I was able to Ctrl-Alt-F1 over to a text terminal and then do Fn-Home / Fn-End to successfully change the display brightness, and then Ctrl-Alt-F8 back to the Gnome session with the new brightness. But after upgrading to 11.04 the psuedoterminals have disappeared.

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• Downloading 12.04 Beta today - Does it now have the daily distro updates?

  - by Stephen Myall

  I downloaded the 12.04 Beta 2 on the day of launch and have been testing and sending bug reports. I now want to install it on another machine. My question is do I use the original image I downloaded and apply the daily distro updates through Update manager OR do a download a new image (because it now has the distro updates included). To be clear I am asking does the 12.04 Beta 2 ISO get updated on a daily basis?

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• Problem with ubuntu 12 install as dual boot

  - by Ismail Sensei

  I went to instal ubuntu (version 12 ) in my laptop as dual boot with windows 7 the problem i've face is when i came to phase 4 that how i went to install it he tell me that i don't have any OS in my laptop !!!! + I already prepared a partition with system file EXT3 and SWAP for ubuntu. i really went to make the dual boot with windows . My laptp is 6730s compaq . Ther is 4 partitions : 1: where the OS is. NTFS 2: data file. NTFS 3: Empty 20 G space . EXT 3 4: SWAP linux.

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• Dual booting Ubuntu 12.04: UEFI and Legacy

  - by cmhughes

  I'm trying to dual boot Ubuntu 12.04 (or 12.10) with Windows 8 on a new Sony Vaio, but have run into some problems :) Specifically, my problems seem to come from choosing UEFI or Legacy as the Bootmode in the BIOS. Here is what I have found so far: Windows 8 needs to boot using UEFI, and doesn't work in Legacy mode Ubuntu (both 12.04 and 12.10) needs to boot using Legacy, and won't boot (at least from the live disk) in UEFI mode I have been able to boot Ubuntu using a live USB disc, provided that I change the Bootmode to Legacy. I haven't committed to installing it yet, because I don't really understand the consequences. My main concerns are that instead of simply selecting Windows or Ubuntu in Grub, I would also have to change my Bootmode every single time, which seems like a lot more trouble than it should be. So, the question: how can I install Ubuntu 12.04 or 12.10 in UEFI boot mode?

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• Changing file permissions on USB external hard drive

  - by pacomet

  I am using an external USB hard drive for a long time in Ubuntu 10.04, both at work and at home. Now I've installed 12.04 at home. Today I used the USB drive for the first time. I can read the disk but can't change the permissions of a file I wanted. Output of "mount" /dev/sdb1 on /media/FREECOM HDD type vfat (rw,nosuid,nodev,uid=1000,gid=1000,shortname=mixed,dmask=0077, utf8=1,showexec,flush,uhelper=udisks) What I try sudo chmod u+w bsst-hdf_to_bsst-h5 and what I get -rw-r--r-- 1 paco paco 2956 dic 19 10:27 bsst-hdf_to_bsst-h5 Any idea would be appreciated. Thanks in advance

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• Pitivi video editor (gstreamer errors)

  - by The Programmer

  The error messages are not helpful in diagnosing what's broken here: What can be done to make Pitivi and gstreamer work better together? Should I just give up on Pitivi and go with another tool? ERROR [15963] [0x7fb986aed700] "" pipeline Sep 18 19:31:14 _errorObject: error from /GstPipeline:pipeline1/GstBin:bin1/GnlComposition:gnlcomposition3/GnlSource:gnlsource: AudioTestSourceFactory3/GstBin:bin5/GstAudioTestSrc:real-audiotestsrc (main.GstAudioTestSrc): GStreamer encountered a general stream error. (gstbasesrc.c(2507): gst_base_src_loop (): /GstPipeline:pipeline1/GstBin:bin1/GnlComposition:gnlcomposition3/GnlSource:gnlsource: AudioTestSourceFactory3/GstBin:bin5/GstAudioTestSrc:real-audiotestsrc: streaming task paused, reason not-negotiated (-4)) (/usr/lib/pitivi/python/pitivi/log/loggable.py:30)

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• How can light sensor be enabled for control brightness and keyboard back-light automatically?

  - by Eng.amr19

  I have A Sony VAIO laptop F-series () Nvidia and it has light sensor. When I was using Windows, this light sensor controlled the brightness and the keyboard backlight automatically due to the surroundings state. But when using Ubuntu 12.04, it only controls the backlight without automatically adjusting the brightness. How can I enable light sensor to automatically adjustment the LCD brightness without losing the keyboard backlight adjustment due to surrounding state?

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• How can I mount a Synology DS212?

  - by Vigo

  I Have installed Ubuntu 11.10 and want to mount a synology ds212. I can see the diskstation in de filebrowser (before mounting with nfs) but can not open it. I've tried to mount it with nfs but no succes. Everything should be right at the Synology (nfs is on and maps are selected), and I've added a line in fstab. If I type sudo mount -a I dont't get an error. If I go to the mounted map I can't see anything in it..... What is going wrong? maybe router? Hope someone can help..!

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• apt-get doesnt download files from NFS location

  - by Pravesh

  I have switched to unix from last 3 months and trying to understand install process and in particular apt-get. I am able to successfully install and download the packages when I configure my repository on http location in /etc/apt/sources.list file. e.g. deb http://web.myspqce.com/u/eng/rose/debian-mirror-squeeze-amd64/mirror/ftp.us.debian.org/debian/ squeeze main contrib non-free This command will download(/var/cache/apt/archive) and install the package when i use apt-get install When I change the source location to file instead of http(nfs mount point), the package is getting installed but NOT getting downloaded in /var/cache/apt/archive. deb file:/deb_repository/debian-mirror-squeeze-amd64/mirror/ftp.us.debian.org/debian/ squeeze main contrib non-free Please let me know if there is any configuration or settings that i have to make to let apt-get to both download and install package when i use (nfs)file:/ instead of http:/ in sources.list. To achieve this, I can use apt-get --downlaod-only and then use apt-get install for both download and install in two separate calls, but I want to know why package is not getting downloaded with apt-get install but only getting installed when used with file:/ in sources.list

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• Why don't %MEM values add up to mem in top?

  - by ben

  I'm currently debugging performance issues with my VPS and for that I'm trying to understand which of the processes eat the most memory. Reading top, here's what I get: Mem: 366544k total, 321396k used, 45148k free, 380k buffers Swap: 1048572k total, 592388k used, 456184k free, 7756k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 12339 ruby 20 0 844m 74m 2440 S 0 20.8 0:24.84 ruby 12363 ruby 20 0 844m 73m 1576 S 0 20.6 0:00.26 ruby 21117 ruby 20 0 171m 33m 1792 S 0 9.3 2:03.98 ruby 11846 ruby 20 0 858m 21m 1820 S 0 6.0 0:09.15 ruby 21277 ruby 20 0 219m 11m 1648 S 0 3.2 2:00.98 ruby 792 root 20 0 266m 10m 1024 S 0 3.0 1:40.06 ruby 532 mysql 20 0 234m 4760 1040 S 0 1.3 0:41.58 mysqld 793 root 20 0 250m 4616 984 S 0 1.3 1:20.55 ruby 586 root 20 0 156m 4532 848 S 0 1.2 6:17.10 god 12315 ruby 20 0 175m 2412 1900 S 0 0.7 0:07.55 ruby 3844 root 20 0 44036 2132 1028 S 0 0.6 1:08.22 ruby 10939 ruby 20 0 179m 1884 1724 S 0 0.5 0:08.33 ruby 4660 ruby 20 0 229m 1592 1440 S 0 0.4 2:55.46 ruby 3879 nobody 20 0 37428 964 520 S 0 0.3 0:01.99 nginx As you can see my memory is about 90% used (which is my issue) but when you add up the %MEM values, it goes to about 50-60% only. Same thing, RES doesn't add up to ~350mb. Why? Am I misunderstanding their meaning? Thanks

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• How will Qt 5.0 be packaged for Raring?

  - by George Edison

  Note: as per the FAQ, "Issues with the next version of Ubuntu" may not be asked as questions here but in my opinion, this is not an issue but merely a question asking about policy. If you feel this question is off-topic, please leave a comment explaining why or open a question on Meta.AU. How will Qt 5.0 be packaged for Ubuntu when it is released? Currently, the name of the package for installing the Qt 4.8 core libraries is: libqt4-core Will the equivalent package for the next version of Qt (5.0) be named libqt5-core? If not, what will the package be named? Will the existing Qt 4.8 libraries coexist with the Qt 5.0 equivalents for the foreseeable future or will they be removed? The Qt 5.0 beta 2 PPA contains a lot of packages - few of which seem to correspond with existing package names. If someone can provide me with a link to a policy outlining the Qt 5.0 migration plan, that would be awesome.

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• Cannot mount one usb disc, although other mounts automatically after 12.10 upgrade

  - by Allen Williams

  Since upgrading to 12.10, switching on or attempting to mount one of my usb hard drives gives this error message: Error mounting system-managed device /dev/sdg1: Command-line `mount "/mnt/usb-ST350041_8AS_60CAFFFFFFFF-0:0-part1"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/sdg1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so dmesg | tail gives (inter alia): [ 1080.727830] sdg: sdg1 [ 1080.732003] sd 8:0:0:0: [sdg] Attached SCSI disk [ 1081.383633] FAT-fs (sdg1): Unrecognized mount option "x-gvfs-show" or missing value [ 1871.160973] sdg: sdg1 The drive cannot be mounted, but is recognized by the system as a "place". I am not a technical bod; I cannot take this further myself and any help would be much appreciated.

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• wifi connection in lubuntu 11.10

  - by made_in_india

  I am facing the wifi network connection problem, which was previously working absolutely fine. I have checked /etc/network/interfaces file auto wlan0 iface wlan0 inet dhcp wireless-mode managed wireless-essid my_network_name I have also tried the following command on terminal but were no use sudo ifup wlan0 fail to bring up wlan0 sudo ifdown wlan0 ifdown: interface wlan0 not configured output of $ sudo lspci |grep -i network has produce the below results 06:00.0 Ethernet controller: Atheros Communications Inc. AR242x / AR542x Wireless Network Adapter (PCI-Express) (rev 01)

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• Unable to Upgrade from 13.04 to 13.10

  - by Mohit

  Following is what I get as error Error during update A problem occurred during the update. This is usually some sort of network problem, please check your network connection and retry. W:Failed to fetch http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/main/source/Sources 404 Not Found , W:Failed to fetch http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/restricted/source/Sources 404 Not Found , W:Failed to fetch http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/universe/source/Sources 404 Not Found , W:Failed to fetch http://bg.archive.ubuntu.com/ubuntu/dists/natty-backports/multiverse/source/Sources 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead. Restoring original system state I am using command line "do-release-upgrade" I have changed my dns to google public dns and verified that using nslookup and host -v could not find bg.archive.ubuntu.com in any of the source list files. not only in that in another tab I have ping google running just to verify that network is not down. Network has no issues.

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• Touchpad not working on HP DV4 notebook

  - by Blaze

  the touchpad doesn't respond at all. i had to use an external usb mouse even to install ubuntu. I dont know the name of the manufacturer too. i am a newbie to ubuntu. i checked many related answers but they didnt help some are: sudo rmmod psmouse sudo modprobe psmouse proto=imps i used deconf editor_ in that it shows that touchpad is enabled but nothing haapens. i tried changing the setting 'disable while typing' that didn't work either. please help me. i really want to use ubuntu as i find it really good but without touchpad it would be pointless. literally.

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• Cannot connect to a Wifi network chipset AR9287

  - by Fritz

  After updating my newly installed ubuntu 10.10. I can't connect to the wifi network anymore although it is showing it. Tried to install manufacturer driver INF file via ndiswrapper only makes things worst - lost my wifi. Downloaded and installed the compat-wireless driver for the Atheros AR9287. After installing, i got my wifi connection again but after rebooting I can't reconnect again. The Wifi access point is showing 2/5 to 3/5 signal strength. Laptop: Acer Aspire 4741G Wifi Adapter: Atheros AR9287 OS: Ubuntu 10.10 64bit

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• How do I add changes resolv.conf without getting overwritten?

  - by Sam

  I have migrated to 12.04 from 7.10 finally. I have one last part to complete but I am stumped. I am using puppet on each server, and in the past have used resolv.conf to point to my search to the puppetmaster. search puppetmaster.com nameserver 192.168.1.XXX When trying to use the file on 12.04 resolv.conf the file gets over written when rebooted. I cannot use a static IP for these, so using the /etc/network/interfaces to help me out is a nill point. # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.0.1 Is there a way to get resolvconf to handle this either in the head, tail or base. If there is, are there any examples I can use to tweak on my server. Any help is much appreciated.

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• Nvidia dual monitor configuration gets lost every time I reboot

  - by sunwukung

  I've recently updated (well, borked then completely reinstalled) to 12.04. I'm running a dual monitor setup, with a Dell U2410 / Dell 2007WFP combination on an HP Elite Book 8560W. The graphics card is an NVIDIA GF108 [Quadro 1000M]. My problem is as follows. I can get the dual monitor setup working fine, but every time I reboot, my machine appears to lose the settings (specifically, the U2410 is disabled, the mouse pointer is locked in the launcher). I have to restate the settings after every launch. I've tried running nvidia-settings as sudo, I've save the changes to my xorg.conf file (see below) but nothing seems to be sticking. Has anyone had similair issues, or know of a fix? Conf file follows: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 295.33 (buildd@allspice) Fri Mar 30 15:25:24 UTC 2012 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 "DELL 2007WFP" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "Quadro 1000M" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "DFP-1" Option "metamodes" "CRT: 1680x1050 +1920+0, DFP-1: 1920x1200 +0+0; CRT: nvidia-auto-select +0+0, DFP-1: NULL" SubSection "Display" Depth 24 EndSubSection EndSection The error message I'm getting is this: none of the selected modes were compatible with the possible modes: Trying modes for CRTC 642: CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1)

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• Script to recursively grep data from certain files in the directory

  - by Jude

  I am making a simple shell script which will minimize the time I spend in searching all directories under a parent directory and grep some things inside some files. Here's my script. #!/bin/sh MainDir=/var/opt/database/1227-1239/ cd "$MainDir" for dir in $(ls); do grep -i "STAGE,te_start_seq Starting" "$dir"/his_file | tail -1 >> /home/xtee/sst-logs.out if [ -f "$dir"/sysconfig.out]; then grep -A 1 "Drive Model" "$dir"/sysconfig.out | tail -1 >> /home/xtee/sst-logs.out else grep -m 1 "Physical memory size" "$dir"/node0/setupsys.out | tail -1 >> /home/xtee/sst-logs.out fi done The script is supposed to grep the string STAGE,te_start_seq Starting under the file his_file then dump it sst-logs.out which it does. My problem though is the part in the if statement. The script should check the current directory for sysconfig.out, grep drive model and dump it to sst-logs.out if it exists, otherwise, change directory to node0 then grep physical memory size from setupsys.out and dump it to sst-logs.out. My problem is, it seems the if then else statement seems not to work as it doesn`t dump any data at all but if i execute grep manually, i do have data. What is wrong with my shell script? Is there any more efficient way in doing this?

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• Steps to diagnose SNU5600 disconnection problem

  - by Rich

  I have a Philips SNU5600 WiFi dongle plugged into two machines (ie I have two SNU5600 dongles, one in each machine). One machine is running 10.10 and the other is running Linux Mint. The dongles work absolutely fine, except if I do a lot of file transfers to a NAS attached to the wireless router. After a while the connection to the router will go. To get the connection back I either need to run sudo /etc/init.d/networking restart or I need to unplug and plug in again the dongle. Otherwise the dongle works fine (web browsing, streaming, etc). Output of lsusb: Bus 002 Device 003: ID 0471:1236 Philips (or NXP) SNU5600 802.11bg Output of lsusb -v at http://pastebin.com/dXYKkF01 What steps should I take next to resolve this? Is it a known problem? Could it be the router? It is a 3Com "OfficeConnect Wireless 11g Cable/DSL Gateway Version 1.02.15".

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• Greek Letters rendered incorrectly in LibreOffice

  - by Matheus de Araújo

  Using an old archive that I have (with Maxwell's equations), the Greek letters display as squares. I tried to change something in the alphabet but even the fonts don't have any Greek letters (they appear like squares too), both Greek and iGreek letters packages. Sounds like a package that's not installed, or corrupted. I still re-downloaded and reinstalled LibreOffice. I don't know what I have to install. The equations look fine in OpenOffice.org (I made the file with it). What should I do?

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• Tomcat Manager Application and HTTP 404 Error

  - by David

  I am trying to set up the admin application for a Tomcat 6.0.24 instance. None of the searches I've done turn up anything I can use. I am using this configuration for Apache 2.2.14: Alias /manager /usr/share/tomcat6-admin/manager <Directory "/usr/share/tomcat6-admin/manager"> Options Indexes FollowSymLinks AllowOverride None allow from all </Directory> ProxyPass /manager ajp://localhost:8009/manager In the tomcat-users.xml I have this: <tomcat-users> <role rolename="tomcat"/> <role rolename="admin"/> <role rolename="operator"/> <role rolename="manager"/> <user username="admin" password="nopasswordforyou" roles="admin,tomcat,manager"/> <user username="operator" password="nevermind" roles="operator"/> </tomcat-users> I found the docs that suggested I needed manager-gui role installed and defined, but that appears to be Tomcat 7, not Tomcat 6. The manager.xml is the default provided with Ubuntu Lucid Lynx 10.04: <Context path="/manager" docBase="/usr/share/tomcat6-admin/manager" antiResourceLocking="false" privileged="true" /> If I access /manager from a web browser, I get a 404 error from Tomcat: "requested resource not available." If I access /manager/images I get the same thing. If I access /manager/401.jsp I get the actual page. In addition, the server.xml has not only the usual Realm (UserDatabaseRealm) but also one for MySQL authentication (JDBCRealm). Investigating this showed that the role of manager was not present there for the user admin; I fixed that by doing: INSERT USER_ROLE_DB SET USER_NAME='admin', ROLE_NAME='manager'; I restarted Tomcat, although I suspect that was overkill. No change. I don't see any errors in catalina.out or in localhost.* log files. What am I missing? What is the interaction between the different realms? How do I get the manager application working?

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• Launcher Disappears, Mouse Pointer Stops Moving

  - by Zachary Rogers

  Quite frequently, when using Ubuntu 12.04 I will have a problem where the launcher disappears and at the same time the mouse cursor will appear to stop moving. However I can actually click on things on other parts of the screen and the pointer will change shape appropriate for what it's actually pointing at. I can left click on things and a menu will appear as normal. I do not have the launcher set to automatically disappear.

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