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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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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127 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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91 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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83 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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767 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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123 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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153 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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49 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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342 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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107 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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31 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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117 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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104 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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126 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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226 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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142 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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2k 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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81 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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125 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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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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123 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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532 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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304 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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171 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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114 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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290 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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872 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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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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100 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 ...
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397 views

Linux detects Vaio touchpad as a ImPS/2 Generic Wheel Mouse

I tried this on Ubuntu, Linux Mint and Fedora. My problem is that in these distros, my Vaio VPCSA touchpad is detected as a normal mouse. It works as a simple mouse but multitouch gestures, double ...
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168 views

My Fedora Setup is gone due to accidental “yum upgrade”

How to roll back? I tried yum history undo 143 and yum --skip-broken history undo 143 and get the following errors. Important: All I care about is getting my kernel and custom graphics driver back to ...
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62 views

Can not copy files after installing windows

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 ...
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223 views

Raspbian: USB drive mounted and accessible but doesn't show on df -h

I have an USB drive connected to my Raspberry Pi running Raspbian, the directories on it are accessible using cd, ls etc but the drive doesn't show up when running df. It however does show when I run ...
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62 views

Automatic package recompilation on apt-get upgrade

Is it possible to achieve the following setup with apt-get on debian based distros, particulary Ubuntu: I need to compile a package from source (like apt-get source ). Before compilation, I need to ...
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75 views

OS X configurations partially lost when sharing home directory with Linux

I've installed Arch Linux on my Macbook Pro with OS X 10.8.5. I created an HFS+ volume(journalling disabled) for home directories so that my personal data can be shared between the two OSes. ...
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1k views

CentOS 5.10 Yum Packages won't update/upgrade

I've just used yum to install PhpMyAdmin and it installed version 2.11.11.3-2.el5 which is completely out of date since version 4 is out. I've tried running yum update phpmyadmin but I receive No ...
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2k views

Ubuntu error Cannot mount USB drive Not Authorized

I have a Ubuntu 11.10 Desktop. Until now I was able to mount any external drives (USB flash drives which have FAT, SD Cards having ext4 partitions/filesystems using USB SD Card adapters). Both of ...
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61 views

X window (or whole linux system) replace Caps Lock with ESC *and* Control

on windows there are several key maps applications that replaces Caps lock with ESC on a single 'press and relase' and with a Control signal if hold and another key is pressed. Is there any way to do ...
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414 views

Lubuntu LiveCD disabling auto-mount.

In cooperation with my IT teacher we want to boot all PC's in IT class with Lubuntu. I've successfully set up PXE server, but there is one thing that worries us. Harddrives shouldn't be accessible ...
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162 views

Why rebooting the system takes longer than a shutdown in fedora?

I'm a fedora (19/ x86-64) user. When I power off the system, it always takes about 3 to 4 seconds to shut down. But whenever I reboot the system, it takes the system much longer (about 30 seconds or ...
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3k views

Show hidden folders and files on Fedora 19

I'm in the middle of a migration from Ubuntu to Fedora. How do I make Nautilis in Fedora show the hidden files and folders (those with a dot)? It's Nautilus 3.8.2, if I go to Preferences and choose ...
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438 views

Computer wont finish booting after I install a third graphics card

I'm running xubuntu on this motherboard and three sapphire 7950 graphics cards. The computer boots and works fine when I have just two of them installed, but when I attach the third the computer stops ...
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373 views

Getting i/o statistics of a process per file

I have a process of I would like to monitor the i/o with some precision. I know the PID, but I can't really control the way it is started (so I can't really put a pv-like command in between). What I ...
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235 views

Thin client PXE boot

Basically here is what I'm trying to do: I'm trying to boot a client remotely (using PXE boot). Over PXE boot I want to start a minimal linux distribution with X and ssh. Then I want to connect using ...
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151 views

Share Windows PPPOE connection with Linux

I have a windows computer connected wirelessly to router and connected to Raspberry Pi (Raspbian Linux) with LAN cable. I need to connect to PPPOE connection and enter my credentials to connect to ...