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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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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282 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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337 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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235 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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242 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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58 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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0answers
44 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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100 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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250 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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93 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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180 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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253 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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0answers
911 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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133 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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183 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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99 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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59 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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84 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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0answers
791 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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31 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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128 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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163 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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51 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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356 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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112 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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32 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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129 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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113 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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86 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
130 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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232 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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145 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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335 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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0answers
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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0answers
85 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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0answers
130 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 ...
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102 views

Stream from Windows Media Player to linux

I'm trying to setup my Pi running Debian Wheezy to play music coming from any computer on the network using the Play to feature of the Windows Media player. The Pi is running headless, so a terminal ...
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0answers
88 views

How to prevent Alt+Shift from switching keyboard layout before keyup?

Motivation: In an appplication I'm using, Alt+Shift+R is taken up by -- well, never mind what, something app-specific. However, on my Linux system (Kubuntu 12.04 specifically), when I press Alt+Shift ...
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1k views

How to trace LDAP authentication failures?

1) I have a working LDAP server which I've confirmed can be used with LDAP clients, running on ec2 via jumpbox. 2) I've run authconfig to setup ldap based authentication, to point to the server: ...
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0answers
126 views

Migrate LVM to ZFS

I am currently thinking about moving away from my LVM setup to a ZFS setup with RAIDZ. My current setup consists of 5 x 4TB disks in a LVM and a 60GB SSD for the system. At the moment there is about ...
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556 views

Error mounting external hard drive

When I tried mounting an external hard drive connected via usb I got the error quoted below. So far I've tried using ntfsfix and chkdsk. My operating system is Arch Linux and the drive is NTFS ...
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332 views

Detect network clients connect and disconnect

I have a linux gateway/server, which sharing PPPoE internet connection between network users. Seeking for a proper way to detect when network clients are connected to and disconnected from the ...
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0answers
176 views

How to use a key binding within shell script ? (Launch terminator in broadcast mode in background)

I currently use a small shell script to start a terminator window as a background process which has multiple splits specified with a layout. terminator --layout=My_layout & I want to execute a ...
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0answers
115 views

KeyRemap4Macbook Vim-emulation alternative for Linux

There is a really nifty tool for Mac OS X called KeyRemap4Macbook which allows you, among other things, to use Vim keybindings to edit text in all text fields, with a distinction between normal and ...
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306 views

How do I disable a bluetooth adapter and install a new one in ubuntu?

I am running Ubuntu 13.04 on a Macbook Pro (8.2). I have a faulty bluetooth antenna that I am not interested in paying to fix. In windows I have a usb bluetooth dongle and I just keep the built in ...
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0answers
937 views

libpng not found on pkg-config search path

When building cairo 1.2.6 from source I get the following error: checking for cairo's PNG backend... configure: WARNING: Could not find libpng in the pkg-config search path checking whether cairo's ...
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0answers
3k views

Windows 7 & Linux Mint sharing: W7 can't see LM

I have a Linux Mint 15 desktop and Windows 7 laptop that I am attempting to share files and a printer with. I have a bit of an odd problem that I can't figure out how to resolve. I've configured the ...
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2k views

USB flash drive is not detected in Ubuntu 12.04

I have 15GB Kingston flash drive. It is not detected in Ubuntu 12.04 and remains hung up in Windows too. sudo fdisk -l output: WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The ...
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0answers
102 views

lowercase 'x' key not working as root under linux

This is a weird one. The title says it all - The lowercase letter 'x' has stopped working as root. It works just fine for other users, and the uppercase form works (Though of course with case ...