Linux refers to the family of Unix-like computer operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

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Detect vga signals from command line

Currently I am working on Ubuntu 12.10. I am using vga2usb device for interacting with other vga devices such as monitors. Is there any command line utility or any specific command from which I can ...
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64 views

Printer configurations on Linux: Providing privilege to normal users

I am on a CentOS machine. Everything is working fine, I can configure the printer with the GUI System->Administration->Printing. It asks for root password and then I can make the configurations. ...
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285 views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
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294 views

OpenVPN, L2TP, or PPTP client that is a SOCKS5 server | linux

I need an OpenVPN, L2TP, or PPTP client for Linux - don't care which - that acts as a SOCKS5 server on the local machine. It should not set up tunnel interfaces or anything like that, it should just ...
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32 views

Best practise for debbuging hdd

I just logged onto my machine when suddenly ls gave me an Input/output error. After rebooting the machine /dev/sda1 could not be mounted. dmesg results in : [ 545.691453] EXT4-fs (sda): VFS: Can't ...
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141 views

LC_LOCALE settings interactions between Mac OSX and LINUX via SSH

I have been struggling with the following problem for years now. I have never been able to solve it, and I adopted several workarounds to keep being able to work. However now I can't stand it anymore, ...
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1k views

Forcing ext4lazyinit to finish its thing?

Is there any way to 'force' ext4lazyinit to finish the thing it does with maximum priority? Something like "I don't care about my system's ressources, just do your job as fast as you can"? I should ...
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50 views

What does dbconfig-common do? Should I use it?

For several packages, the installer asks you if you'd like to use 'dbconfig-common'. After some Googling, I can't really find (in plain old English) what the heck that package brings to the table, ...
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130 views

Is there a tool like dm-crypt/luks using RSA encryption?

Is there a library/tool available for linux, similar to dm-crypt/LUKS using RSA encryption instead of symmetric ciphers? I want the "public side" to only be able to create these volumes, and the ...
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580 views

Debian Linux - “hcitool scan” does not find devices

I use free VMware player with Debian 7 image. I use Cambridge Silicone Radio Bluetooth USB adapter "hciconfig" shows me two interfaces (I don't know why two, and I don't know with which I should ...
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296 views

My custom fish shell prompt keeps resetting every reboot

I switched to fish shell a month ago and I'm quite pleased with it. But recently, my custom prompt keeps resetting to the default prompt every time I turn on my PC. When opening the terminal, I'm ...
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188 views

Behaviour of Caps-lock in Linux on VirtualBox, OSX Host

I'm running Ubuntu under virtualbox on a MacBook Pro and I'm trying to remap the Caps-Lock key to mod3 so I can use it as a replacement for the Alt key in Xmonad. I can remap the keysyms but the ...
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957 views

Fedora 20 - bootmgfw.efi' not found - GRUB2

I have a problem with the bootloader after the installation of Fedora 20. Today I've installed Fedora 20 overwritng Ubuntu 14.04 without experiencing trouble. When I rebooted the pc, I noticed that ...
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289 views

Redundancy: LVM+mdadm or LVM internal RAID

The task is to create LVM storage for virtual machine images. So LVM will be used in any case. There are two ways LVM providing redundancy: block mirroring lvcreate -m 1 --mirrorlog mirrored -n ...
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349 views

linux catalyst and three monitors

I just switched from opensource ati driver to catalyst because I had many crashes on my linux box when playing flash videos. It looks like with fglrx my system is more stable, but I lost my third ...
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239 views

X11 evdev mouse generates duplicate events

Lately my x11 server started registering several duplicate mouse click events per single click. I've tried upgrading xorg server and drivers, but it didn't help. Using different mouse doesn't help as ...
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258 views

rasperry pi / debian / directory mount issue

I have trouble regarding to external USB disk write operations I am using Rasperry Pi box with Debian Linux root@raspberrypi:~# umount /dev/sda1 root@raspberrypi:~# mkdir /media/extGrayUSB ...
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59 views

Sudo works as su

Ive observed kind of strange behaviour. I have openSuse and when Im in console and want to gain root access for executing one command, after typing sudo it like switches me as if Id type su. ...
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210 views

How to set timeout for svn update?

I have about hundreds of server(all has its own working copy), fabric(python ssh tool for administration) will issue multiple svn update to those machines, many commands (10% machine) return ...
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46 views

using pam_mount in WLAN setting

I thought this should be a simple exercise here, but obviously I couldn't find a solution, yet. I use KDE on Ubuntu 12 LTS. I want to use libpam-mount to mount a nfs share to a directory within user's ...
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111 views

Preventing unused spare hdd from spinning up during suspend and shutdown

I recently replaced my sata hdd with an ssd, and keeping the hdd in as a spare. It's not used, not event mounted to filesystem. Yet, when suspending or shutting down the system, it quickly spins up, ...
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268 views

stdbuf not working while unbuffer does

I am trying to apply timestamps to stdout of a process. For the proper timestamps to be applied, I attempt to unbuffer stdout of the process. This works with unbuffer but not with stdbuf as I would ...
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97 views

Userspace manipulation of partition and disk images

On a Linux system, is it possible to use only user-space tools to create and manipulate partition images (which will probably only have ext2 filesystems on them) and then take those partition images ...
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196 views

xwindow and poor man's video wall

We have a "video wall" at my workplace. It consists of 8 43" - 50" screens. 5 of them support full HD resolution, remaining 3, do not. Screens also have different video inputs. Some support HDMI and ...
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278 views

Mounting shared directory for chroot users

I ran in to an interesting issue with mounting that doesn't make any sense to me. Basically I have setup a chroot environment for SFTP users, they each have a chroot directory with a format of ...
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992 views

Synergy client won't connect, despite open port?

I want to use a Debian KDE desktop computer (network name bradbury) as the server, and a Windows 7 laptop (network name Clarke) as the client. I have used this setup before without problems, but then ...
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146 views

Linux LUKS and choice of filesystem

Which filesystem displays the best performance when running on a LUKS encrypted partition? Does it make sense to use f2fs when the LUKS partition is on an SSD, or does the device-mapper abstraction ...
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206 views

No protocol specified

I can't run any of the graphical applications from root terminal. No protocol specified xhost: Unable to open display ":0.0" Any idea what to look for?
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104 views

Linux Ubuntu System Error

After I have given myself the access rights for directory /usr and all its contents with sudo chown -R USER /usr my Ubuntu 12.04 System totally fails. E.g. Internetconnection is not possible ...
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63 views

Determine how many physical/hardware USB host controllers I have

Out of simple curiosity, I'm trying to determine how many hardware USB host controllers my machine has. lsub lists seven root hubs, and lspci -v and lshw both list seven host controllers. I'm ...
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86 views

Socksify php script

I am trying to socksify php script network connections, however I am unable to do that, script ignores the socksifyer, just connects directly. I tried using tsocks and torsocks. tsocks php ...
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821 views

Multiple Linux distributions return “Fast TSC calibration failed” when running on Hyper-V

Client Hyper-V on Windows 8.1 Pro host with Intel Core i7-4800MQ processor. Several Linux distributions, including openSUSE and Kali Linux, return the following error message when booting up in a ...
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33 views

How to type special characters in Linux when Russian layout is active?

The way to type special unicode characters in Linux is to press Ctrl + Shift + u and then to type the character number. But this method doesn't work when Russian layout is active. So if I'm typing in ...
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140 views

btrfs does not show drive as missing

I am trying out btrfs and I noticed some funny behaviour: I have two drives in a raid 1 configuration. sudo btrfs fi show Label: none uuid: 52b9c6f6-ce5c-4727-861e-e2fd012e475f Total devices 2 ...
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1k views

USB disk not auto-mounting in Ubuntu 12.04

It used to, but suddenly now it doesn't. The device shows up in the following: dmesg | tail -1 [394191.758315] usb 2-1.3: new high-speed USB device number 9 using ehci_hcd ...which I know is the ...
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173 views

Adding nonstandard files to a checkinstall package

I am experimenting with checkinstall to manage custom builds of software. I would like to add custom files to a package, e.g. /etc/init.d/nginx when installing nginx. The --include parameter is a ...
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55 views

mixing sound from multiple users' processes on linux

As in the title. Is it possible without setting up a system-wide pulse server to mix audio output from multiple processes owned by different users on Linux? I have no trouble mixing audio when all ...
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379 views

Lightdm, x11vnc two seats: VNC keyboard/mouse input only works if seat is active

I have Lightdm setup to run two seats: XBMC (Seat:0) which uses my monitor xfce (Seat:1) which uses virtual terminal 8 This way I can switch between them using Crtl-Alt-F7/F8 I use x11vnc to ...
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117 views

Change group or permissions when a file is moved to a shared directory on Linux

I've set up a Linux server accessible with ssh and Samba share. Every user has his own folder USER/ and a public folder USER_public/. Permissions on the USER_public/ are set up using setfacl in such ...
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34 views

Can I change the size of the kde menu?

I would like to make the menu bigger (=covering more of the screen and showing more), is that possible? Using opensuse 13 kde
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133 views

Consolidation of Free Space on Ext4

I'm building an linux installation which then will be pushed to various devices with different means of mass storage. Therefore, I'd like to shorten the partitions lengths before creating an image to ...
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122 views

Why does the “date -u” command show time 25 seconds ahead of “export TZ=UTC; date”?

I am running clockspeed-0.62 (DJB software) on Ubuntu 13.10 (Saucy Salamander). I have setup time zones so that /usr/share/zoneinfo is a link to /usr/share/right, and I have setup an up-to-date ...
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87 views

How can I create a CD or USB key that fully restores a Linux install? (a la the CDs that come with Windows boxen)

Whenever I assemble and configure a Linux PC for someone, I always run into the problem of what happens if they want to restore their system back to the way it was when they got it. Either they ...
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0answers
140 views

ffmpeg x11grab a single window

Is it possible with ffmpeg grab a window that is minimized or that not has the focus (there is another window over but ffmpeg records only the window which is below)? With a command like ffmpeg -f ...
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236 views

PC reboots after “Welcome to Grub” unless booted from BIOS

I have a Linux machine running on an ASUS P8H77-I. The boot drive is correctly set in the BIOS. If I let it boot normally, I see the Welcome to Grub line, then it reboots, and repeats forever. If I ...
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150 views

VirtualBox error with Ubuntu virtual machine

I am trying to work on a coding project and cannot open my Ubuntu virtual machine with Oracle VM VirtualBox. I took a snapshot yesterday at about 11, and it was working fine. Several times I closed ...
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348 views

is it possible to install boost 1.55 on fedora 20 without breaking dependencies to existing boost 1.54?

I must switch from boost and boost-devel 1.54 to 1.55 due to a bug in 1.54 on a fedora 20 x86_64 machine and I wonder what's the preferred way. There are some packages that rely on boost ...
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3k views

CHECK_NRPE: Socket timeout after 10 seconds, when trying to read Windows Server 2008

When invoking the check_nrpe via terminal, like so: /usr/lib/nagios/plugins/check_nrpe -H winserver -c alias_cpu I get the error below: CHECK_NRPE: Socket timeout after 10 seconds. (Also ...
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89 views

Can I get urxvt to recognize xmodmap configuration?

i switch from an apple-style keyboard at home to a microsoft-style keyboard at work. the primary difference in these keyboards is that the super key and the alt key are transposed. i've used xmodmap ...
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137 views

How to interpret state and log files written by preload program in Linux?

Preload is a program which prefetches files from the disk needed by various applications to reduce application startup time. It seems to be very popular and useful (just google preload+linux) but the ...