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  • Linux boot - stop the kernel switching to a new framebuffer mode clearing output

    - by Avio
    I'm working on an embedded system (based onUbuntu 12.04 LTS) and I'm customizing its kernel. I'm having some problem with upstart, mountall and plymouth. Nothing unsolvable I suppose, but the real problem is that I can't diagnose properly what's going on because the kernel (or maybe plymouth) changes the video mode in the middle of the boot process. This completely wipes entire lines of log and prevents any debugging of kernel misconfigurations. My Grub2 config seems to be ok with: GRUB_CMDLINE_LINUX="" GRUB_CMDLINE_LINUX_DEFAULT="acpi=force noplymouth" GRUB_GFXMODE=1024x768x32 GRUB_GFXPAYLOAD_LINUX=keep Here is some relevant output of lspci: 00:00.0 Host bridge: Intel Corporation Mobile 945GSE Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) And here is the relevant portion of my kernel configuration: CONFIG_AGP=y CONFIG_AGP_INTEL=y CONFIG_VGA_ARB=y CONFIG_VGA_ARB_MAX_GPUS=16 CONFIG_DRM=y CONFIG_DRM_KMS_HELPER=y CONFIG_DRM_I915=y CONFIG_DRM_I915_KMS=y CONFIG_VIDEO_OUTPUT_CONTROL=y CONFIG_FB=y CONFIG_FB_BOOT_VESA_SUPPORT=y CONFIG_FB_CFB_FILLRECT=y CONFIG_FB_CFB_COPYAREA=y CONFIG_FB_CFB_IMAGEBLIT=y CONFIG_FB_MODE_HELPERS=y CONFIG_FB_VESA=y CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_BACKLIGHT_CLASS_DEVICE=y CONFIG_VGA_CONSOLE=y CONFIG_VGACON_SOFT_SCROLLBACK=y CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=640 CONFIG_DUMMY_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y CONFIG_FONT_8x8=y CONFIG_FONT_8x16=y CONFIG_LOGO=y CONFIG_LOGO_LINUX_MONO=y CONFIG_LOGO_LINUX_VGA16=y CONFIG_LOGO_LINUX_CLUT224=y Every other custom/stock kernel boot fine with that Grub2 config. What I would like to have is a single flow of messages on a single console (retaining one screen resolution) from the bootup logo till the login prompt. Does anybody know what I have to tweak to achieve this?

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  • How to make new copied file always 777 permission

    - by Master
    I have one Linux ext3 partition shared on network. Now when some one copy files from MAc , then other people can't change the file dute to permission problem. Is there any way that ane new file which is copied will always have 777 permission and some specific user as owner of file not the default user thanks

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  • NFS Issues in Gnome

    - by Alex
    I mount NFSv4 export via /etc/fstab and mount and use the shared folder in nautilus. There are two issues: When I copy a large file (around 4 GB) to the NFS server, the progress bar rapidly goes to 2 GB and then basically stops moving. But the copy s still in progress - it is just not displayed well When I disconnect from the network without unmounting the nfs share, nautilus freezes. How can I work around that? /etc/export on the server /export/share 192.168.0.0/24(rw,sync,insecure,no_subtree_check,anonuid=1000,anongid=1000) /etc/fstab on the client: server:/share /mnt nfs4 soft,tcp

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  • Where to download unix command?

    - by person
    I tried to run mvdir earlier and it said command not found. I then ran a search for it and still not found. Is there a place I can download the script for the command, and is there any information I should know post-download to get it to work?

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  • Why is my display name in Ubuntu Software Center some weird set of letters?

    - by Ike
    In USC, after I submit a review, my display name is "Bnxdcty"... a swell name, but where did it come from? I have checked the ubuntu single sign on page, verified my nickname on there, changed it to something else and back again for good measure, but still my reviewer name is somehow still "Bnxdcty". I even unauthorized ubuntu software center and then re-opened it/authorized it to my account. Does this just appear as this to me and others see my correct user nickname? It doesn't bother as much as it confuses me. I just know it will be something stupid that everyone knows but me.

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  • VMware postfix server drops connection

    - by nicoX
    Our physical server godzilla forwards mails to our virtuall VMware server b4. They are on the same net. Often connection drops, we can't ping godzilla with our b4. That means mails from godzilla won't reach b4 and the mails will be in handed into the mailq. Sometimes it takes some hours and the issue will auto fix itself, b4 will wake up and the mail will be delivered. Another thing if we remotely ssh into the b4, the b4 will wake up and and receive any mailq mails from godzilla and deliver them. netadmin@b4:/var/log$ arp -a ? (192.168.209.80) at 00:1E:C9:AE:79:9D [ether] on eth0 root@godzilla:/usr/local/bin# arp -a ? (192.168.209.20) at 00:50:56:91:7d:b2 [ether] on eth0

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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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  • Good set of web hosting permissions?

    - by Jorge Israel Peña
    Hey guys, I just got a linode and I'm in the process of configuring it. It's running nginx with php-fpm and passenger. nginx was compiled and is running as user nginx. php-fpm (php with fastcgi process manager) is running as www-data (in group www-data). My sites are currently in /var/www, so for example /var/www/test.com I'm just wondering what the general 'flow' of things is. So for example, /var/www is owned by root, should I chown of /var/www/test.com to nginx or www-data? Or should I put nginx in the www-data group? How should site uploading work, I just transfer files to the /var/www/test.com directory as root (sudo) and then chown -R www-data:www-data .? Thanks. I'm capable of figuring things out on my own, I'm just wondering what the typical/general way of handling users/groups/permissions/site-files is on linux with a webserver.

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  • ffmpeg: video file played OK on Ubuntu, but no sound on XP

    - by Andy Le
    I created a video clip using ffmpeg (vcodec: mpeg2video, acodec: AC3 5.1). The file can be played normally on Ubuntu, but when I play it on an XP machine, there is no sound. I can play AC3 files and other movies with AC3 sound. I already tried many codec packs and many players. When I compare the MediaInfo tab of the Properties window of the file with another playable movie, I see that the Audio Identifier of the audio stream in my file is 0x80 while it is 0x02 in the other movie. So I guess that's why players on XP can't recognize the audio codec. When I use an MKV container instead of MPEG (still mpeg2video codec), then the result is OK on both Ubuntu and XP (with the correct Audio ID). I really need MPEG though. Any idea? This is the command I used: ~/ffmpeg/ffmpeg/ffmpeg -loop_input \ -t 97 -r 30000/1001 -i v%4d.tga -i final.ac3 \ -vcodec mpeg2video -qscale 1 -s 400x400 -r 30000/1001 \ -acodec copy -y out6.mpeg 2 This is the output of mediainfo (on Ubuntu): General Complete name : out6.mpeg Format : MPEG-PS File size : 6.86 MiB Duration : 1mn 37s Overall bit rate : 593 Kbps Video ID : 224 (0xE0) Format : MPEG Video Format version : Version 2 Format profile : Main@Main Format settings, BVOP : No Format settings, Matrix : Default Format_Settings_GOP : M=1, N=12 Duration : 1mn 37s Bit rate mode : Variable Bit rate : 122 Kbps Width : 400 pixels Height : 400 pixels Display aspect ratio : 1.000 Frame rate : 29.970 fps Resolution : 8 bits Colorimetry : 4:2:0 Scan type : Progressive Bits/(Pixel*Frame) : 0.025 Stream size : 1.41 MiB (21%) Audio ID : 128 (0x80) Format : AC-3 Format/Info : Audio Coding 3 Duration : 1mn 36s Bit rate mode : Constant Bit rate : 448 Kbps Channel(s) : 6 channels Channel positions : Front: L C R, Side: L R, LFE Sampling rate : 44.1 KHz Stream size : 5.18 MiB (75%)

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  • pdns-recursor allocates resources to non-existing queries

    - by azzid
    I've got a lab-server running pdns-recursor. I set it up to experiment with rate limiting, so it has been resolving requests openly from the whole internet for weeks. My idea was that sooner or later it would get abused, giving me a real user case to experiment with. To keep track of the usage I set up nagios to monitor the number of concurrent-queries to the server. Today I got notice from nagios that my specified limit had been reached. I logged in to start trimming away the malicious questions I was expecting, however, when I started looking at it I couldn't see the expected traffic. What I found is that even though I have over 20 concurrent-queries registered by the server I see no requests in the logs. The following command describes the situation well: $ sudo rec_control get concurrent-queries; sudo rec_control top-remotes 22 Over last 0 queries: How can there be 22 concurrent-queries when the server has 0 queries registered? EDIT: Figured it out! To get top-remotes working I needed to set ################################# # remotes-ringbuffer-entries maximum number of packets to store statistics for # remotes-ringbuffer-entries=100000 It defaults to 0 storing no information to base top-remotes statistics on.

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  • disable .recycle feature for samba shares

    - by Crash893
    I had a pretty big scare when my company file server filled up. after tacking down the source I discovered that there is a .recycle folder that keeps ALL the files ever deleted (which is also hidden) Is there anyway to disable this feature? or periodically run a command that will delete all the junk?

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  • User start daemon .pid Permission denied

    - by kornnflake
    Trying to start a unicorn daemon as a non-root user but failing hard. Unicorn gives the the following error: directory for pid=/var/run/sinatra_test/sinatra_test.pid not writable So I made the following: sudo mkdir /var/run/sinatra_test sudo chown ruby:www-data /var/run/sinatra_test sudo chmod g+w /var/run/sinatra_test ls -ld /var/run/sinatra_test returns: drwxrwxr-x 2 ruby www-data 60 Oct 27 09:55 /var/run/sinatra_test What am I missing? Still getting Permission denied errors.

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  • Devices renamed with udev not working, original device node still there

    - by skerit
    I'm trying to rename certain video devices using udev. Here's a rule (broken down for readability): ACTION=="add", SUBSYSTEM=="usb", ATTR{busnum}=="1", ATTR{devpath}=="2", ATTR{idVendor}=="05e1", NAME="video97" It works. /dev/video97 is created But the original /dev/video1 node is STILL there. The even worse, when I try to view the /dev/video97 node in guvcview it doesn't work, while the original node DOES work.

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  • Strange ssh key issue

    - by user55714
    Scenario 1. I am doing this from /home/deploy directory I am trying to set up ssh with github for capistrano deployment. this has been an absolute nightmare. when I do ssh [email protected] as the deploy account I get Permission denied (publickey). so may be the key is not being found, so If I do a ssh-add /home/deploy/.ssh/id_rsa Could not open a connection to your authentication agent. (i did verify that the ssh-agent was running) If I do exec ssh-agent bash and then repeat the ssh-add then the key does get added and I can ssh into github. Now I exit from the ssh connection to my server and ssh back in and I can't ssh into github anymore! Scenario 2 if I login to my remote server and then cd into my .ssh directory and ssh into github then it all works fine I guess there is a problem with locating the key and for some reason the agent isn't funcitoning correctly. Any ideas? Her is a pastie with more details..my .bashrc, permissions etc. http://pastie.org/pastes/1190557/

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  • Nagios only create warning for a http service

    - by MeinAccount
    I would like to also monitor non-crucial services with nagios like for example our GitLab-server or phpMyAdmin instance. Is there any way to just create warnings instead of circuital errors for some services? At the moment I'm using the following: define service { host_name localhost use generic-service service_description HTTP GitLab check_command check_www!git.example.com!'/users/sign_in' } define command { command_name check_www command_line /usr/lib/nagios/plugins/check_http -H '$ARG1$' -I '$HOSTADDRESS$' -e 'HTTP/1.1 200 OK' -u '$ARG2$' }

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  • What actions does Ubuntu trigger when battery is low?

    - by blueyed
    When the battery is low, the screen gets dimmed after a few seconds already. This appears to be some special power-saving mode, and might be related to the time in org.gnome.settings-daemon.plugins.power.time-low (1200 seconds (20 minutes) the default). While this seems to get triggered by gnome-settings-daemon, I wonder what else Ubuntu does when this happens (e.g. via DBus listeners), or other event listeners that look for a "low battery" state. It seems like something in this regard causes Ubuntu / X / the system to behave more sluggish afterwards (when the laptop is on AC again), and I would like to look into what might be causing this. I could not find anything related via dconf-editor, e.g. in org.gnome.settings-daemon.plugins.power. It appears to get setup via idle_configure in plugins/power/gsd-power-manager.c, but it's probably something more related to something that listens on the DBus interface, which gets notified via e.g.: if (!g_dbus_connection_emit_signal (manager->priv->connection, NULL, GSD_POWER_DBUS_PATH, "org.freedesktop.DBus.Properties", "PropertiesChanged", props_changed, &error)) I could imagine that some "power saving" property gets set, but not unset when AC is available anymore and/or the battery is not low anymore. I have looked at the CPU governor setting (/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor), but it was ondemand. I am using gnome-settings-daemon with awesomeWM on Ubuntu 14.04. gnome-settings-daemon=3.8.6.1-0ubuntu11.1 I've also compared gsd's plugins/power/gsd-power-manager.c with the one from Debian's gnome-settings-daemon-3.12.1, but could not find anything obvious that might have been fixed/changed in this regard. I have managed to trigger the gnome-power-manager's gnome-settings plugin (which dims the screen etc), by patching upower and use it after killing the system's upower daemon. (note that it's probably only energy that is being used by gpm to calculate it by itself). It does not make the system become sluggish.. OTOH I have not heard the speaker's beeping, which might come from the BIOS, which might be involved here, too - or other programs using the kernel's interface on /sys/class/power_supply/BAT0/. --- src/linux/up-device-supply.c.orig 2014-06-07 16:48:32.735920661 +0200 +++ src/linux/up-device-supply.c 2014-06-07 16:48:39.391920525 +0200 @@ -821,6 +821,9 @@ supply->priv->energy_old_first = 0; } + percentage = 3.1f; + time_to_empty = 3*60; + energy = 5; g_object_set (device, "energy", energy, "energy-full", energy_full,

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  • Grub error 18, gparted not showing anything

    - by Montecristo
    Some week ago I started having some problems with my pc, sometimes it just freezed not allowing me to do anything. I had to turn it off and on and sometimes do it a couple of time even at startup. Now it does not start at all, grub is giving me error 18. I have found that a solution is to create a bootable partition in the first sector of the disk. gparted does not recognize any partition, the window in which there would be my partitions is empty. sudo fdisk -l does not output anything. If I type sudo mount /dev/sda and then tab tab to autocomplete these are the devices coming out: sda sda1 sda2 sda5. If I launch sudo mount -t ext3 /dev/sda1 disk I get the following error: mount: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so dmesg outputs [ 1831.974847] EXT3-fs: unable to read superblock Do you know how to solve this issue? I'm not completely sure this is a software problem, should I try with a new hard disk?

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  • Add entire 300 GB filesystem to Git Annex repository?

    - by Ryan Lester
    By default, I get an error that I have too many open files from the process. If I lift the limit manually, I get an error that I'm out of memory. For whatever reason, it seems that Git Annex in its current state is not optimised for this sort of task (adding thousands of files to a repository at once). As a possible solution, my next thought was to do something like: cd / find . -type d | git annex add --$NONRECURSIVELY find . -type f | git annex add # Need to add parent directories of each file first or adding files fails The problem with this solution is that there doesn't seem from the documentation to be a way to non-recursively add a directory in Git Annex. Is there something I'm missing or a workaround for this? If my proposed solution is a dead end, are there other ways that people have solved this problem?

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  • Shouldn't emesene themes change the emesene indicator icon?

    - by D Connors
    As it stands right now, I can't get the emesene icon in the indicator applet (or notification area, or whatever it's named) to change. No matter what icon theme I choose, even installing new themes, the icon is always the default one. Is that a standard behavior, or am I getting a bug? I'm running the latest version of emesene from their ppa (1.6-dev), on Lucid Lynx.

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  • Echo 404 directly from nginx to improve performance

    - by user64204
    I am in charge of production servers serving static content for a website. Those servers are constantly being crawled by bots looking for potential exploits (which isn't that much of a problem security-wise because no application can be reached behind the web server) but generates thousands of 404 per day, sometimes per hour. I am looking into ways of blocking those requests but it's tricky (you want to make sure you don't block legitimate traffic and these bots are becoming more and more clever at looking like they're legit) and is going to take me a while to find an acceptable solution. In the meantime I would like to reduce the performance impact of serving those 404 pages. Indeed we're using nginx which by default is configured to serve it's 404 page from the disk (This can be changed using the error_page directive but in the end the 404 will either have to be served from disk or from another external source (e.g. upstream application which would be worst)) which isn't ideal. I ran a test with ab on my local machine with a basic configuration: in one case I echo a message directly from nginx so the disk isn't touched at all, in the other case I hit a missing page and nginx serves its 404 from disk. server { # [...] the default nginx stuff location / { } location /this_page_exists { echo "this page was found"; } } Here are the test results (my laptop has Intel(R) Core(TM) i7-2670QM + SSD in case you're wondering why they are so high): $ ab -n 500000 -c 1000 http://localhost/this_page_exists Requests per second: 25609.16 [#/sec] (mean) $ ab -n 500000 -c 1000 http://localhost/this_page_doesnt_exists Requests per second: 22905.72 [#/sec] (mean) As you can see, returning a value with echo is 11% ((25609-22905)÷22905×100) faster than serving the 404 page from disk. Accordingly I would like to echo a simple 404 Page not Found string from nginx. I tried many things so far but they all failed, essentially the idea was this: location / { try_files $uri @not_found; } location @not_found { echo "404 - Page not found"; } The problem is that as soon as the echo directive is used, the http response code is set to 200. I tried changing that by doing error_page 200 = 400 but that breaks the configuration. How can I serve a 404 page directly from nginx? (without hacking the source which may be might next step)

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  • What are the system requirements for each flavor of Ubuntu Desktop?

    - by Braiam
    I'm thinking about installing Ubuntu Desktop, but I don't know what flavor is the better for my system. What are the minimum and recommended hardware requirements? What kind of CPU? How much memory? Should I have Hardware Acceleration? What flavor should I use? This is an attempt of a canonical answer. My answers have the "official minimal requirements", the recommended are a mix of official sources and opinion based (along with the answer it's told the source). You can comment or edit if you feel that the information is obsolete or incomplete. Is a good rule of thumb that any system capable to run Windows Vista, 7, 8 x86 OS X will almost always be a lot faster with any Ubuntu flavor even if they are lower-spec than described below.

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  • How do I set up my Ubuntu Server to let my Mac connect with FTP?

    - by Dolphin
    I have a server running Ubuntu Server 10.04, and I installed vsftpd on it. Now, I am able to connect to it with only one program which is for windows only (bleh) The program is WinSCP. I cannot connect to the server with any other application, such as the Ubuntu connect to server, Mac connect to server, FileZilla, Web Browser, or anything that is not WinSCP. I need to be able to connect with other applications because I mainly use a Mac to manage the server. I don't want to install wine on my Mac.

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  • Can't re-open "Group My Tabs" page after killing Firefox

    - by isomorphismes
    Due to memory problems I closed Firefox whilst the Group My Tabs (Ctrl+e) feature was displaying the multiple tab groups. After 20 minutes the process still hadn't finished so killall firefoxed it. When I restart Firefox, there is a Javascript process called tabview.js that hangs unless I click Stop at the warning screen. If I do hit Stop then I can no longer open the tabview, so I can't get to any of the tabs except in the subgroup I was last looking at. Any suggestions?

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  • Ubuntu's New Web Office Integration

    <b>LinuxUK:</b> "Take for instance a low powered, possibly mobile/embedded system with limited processing power and memory. A cloud based service for these devices could allow resource intensive tasks to be offloaded to an online server somewhere, greatly improving the UX"

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