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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Running a Virtual Machine and Hypervisor on the same machine

I've got a desktop and a laptop computer. Both run Intel hardware. I mainly do word processing, programming, watching videos and surfing the Internet (I don't play computer games). I would like to ...
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Conditional variables in Makefile

I am trying to compile source code in various ways. For example, suppose I want to compile a fortran program with source code main.f90, file1.f90, and file2.f90 as inputs. To generate hello.exe, I ...
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Issues changing default terminal in Debian

I've installed gnome-terminal on my Debian PC which is running KDE on top of it. I've tried to replace default terminal emulator using "default applications" and sudo update-alternatives –config ...
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How do check if USB and internet ports work with linux?

I've heard that if the USB ports stop working in windows they can be checked via linux. How can that be done? Does it matter which OS I install?
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Programs not Executing

So one day randomly a month ago all of my programs that I installed stopped opening when I clicked them. I figured out how to manually run Minecraft since it is a jar file, but other programs not so ...
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How to avoid boot failure after upgrade from Windows 7 to Windows 10 with dual boot

Basically, I want to avoid this: http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue My current disk partitioning scheme looks like this Model: ATA ST1000DM003-9YN1 (scsi) ...
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Setterm blink issue

I'm using Debian with KDE version 4.14.2 and I'm trying to make Terminal cursor to blink, like in Ubuntu. Using setterm --blink on makes username and hostname to blink until next command, but nothing ...
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How to remove GRUB from Windows 8.1?

Awhile back ago I had installed Fedora 21 on my PC (with trouble of course). Anyways, fast forward today, I get tired of the dual boot (grub) screen and decide to wipe my linux partition thinking that ...
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Unable to boot Kali Linux 1.1.0 using a bootable pendrive

I have made a USB livestick for Kali 1.1.0 with Win32DiskImager and tried to boot it in Windows 8.1. When I came to the boot order menu my USB was recognized as an EFI-device, but when I tried to run ...
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How to log vnstat or equivalent to file

I have a few servers that run both Linux and OS X. I would like the ability to capture and log the amount of data passing through eth0 interface. The file should look like this and rotate daily with ...
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Connecting two internet into a PC?

Let's say I've a spare internet connection. If I buy an additional LAN card, will I be able to utilize the two connections simultaneously? Will this work irregardless of OS, say Windows or Ubuntu? I ...
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This bash command runs on OSX but not on Busybox ..why?

I've got this bash one-liner , it runs fine on OSX, but doesn't on Linux, I'm suspecting the linux distro (Busybox) on my Qnap has got something to do with this . Here is the command that runs on OSX ...
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Raspberry Pi Serial Bluetooth Module not detected

I have a serial Bluetooth module built for Arduino, but I need to get it to work on a Raspberry Pi (Running Raspbian). I installed bluetooth, bluez and I have it wired up with the TXD and RXD crossed. ...
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Ubuntu - OK to raid0 and raid1 on same two drives?

I'm building a household Ubuntu 14.04 server and just installed two 3TB drives for the files and media. The box (HP DC7900 SFF) uses Intel Matrix RAID which, according to wikipedia is neither hardware ...
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Clonezilla vs external blu-ray

I am running clonezilla vivid (stable), which is built on Ubuntu 15.0 (kernel 3.19.0-18-generic)... I see this when I boot the clonezilla iso and run a manual linux shell... user@vivid:~$ cat ...
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? wildcard produces unexpected result in LS directory search

I'm trying to get the hang of the CLI (command line interface). At the overall root directory, I did the following: root@droplet:/# ls ?tc I expected to get just the etc folder in the result list. ...
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which operating system to install on raspberry pi 2?

I have just got a new Raspberry pi 2 model B. I am just a little confused which operating system i should install on it? The two options I have are Windows 10 IOT or UNBUNTU Mate? I mean which OS ...
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What is the equivalent of Ubuntu /etc/network/if-pre-up.d/ in Fedora (22)

I'm trying to migrate from Ubuntu to Fedora(22) but I can't find how to run a network script before the interface is up. Is there any equivalent of this /etc/network/if-pre-up.d/ in Fedora? I need to ...
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How to set proxy server Squid on CentOS multiple connections for download

I am now using Cent-OS and i have installed squid proxy server completely. The problem i meet is when I use Internet download manager and set proxy) to download a file, Internet download manager could ...
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Linux sh script throws “#!/bin/sh: not found”

i have a script #!/bin/sh # Automatically remove a torrent and delete its data after a specified period of # time (in seconds). TARGET=/var/www/transmission/completed USER=name PASS=pass ...
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How to dual boot Windows 10 and (Kali) Linux?

I tried to install (Kali) Linux over a live usb stick (live .. > Application > System Tools > Install Kali Linux), but the with Windows 10 created partition of ~60GB won't be recognized by the ...
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Fedora L2TP IPSEC VPN failure

I'm trying to connect to an L2TP IPSEC VPN server on Fedora 22. Connections have been successful Windows, Mac OS X, iOS and Android. I cannot get it to work on Fedora 22. I've followed ...
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Restart a command after it gets killed by the system

I have been using Gmvault to backup my Gmail email accounts but since the machine I use for doing this job only has 1GB memory, it frequently got killed by the system (Ubuntu) when it exhausted all ...
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Does qemu/KVM allow sound through Spice?

I'm setting up a Windows 7 virtual machine to try and eliminate my physical partition. I have it installed and working with Spice and the drivers from the fedora site: ...
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How come monitoring the status of a write to USB isn't reliable?

I write ISO files to USB thumb drives a lot, and I'm trying to find a way to monitor the status of a write. Googling this, I have found a bunch of solutions, including pv, dcfldd and the USR1 signal ...
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No access in the bash script

I am new to the bash script. I want to carry out the simulation using bash and I want to make it open the fortran program file. While I am writing this: #!/bin/bash echo ...
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Strange TCP Connections - How to kill

My parents Mac is having some random issues - my mum paid £160 to get the computer repaired as there were some "trojans" according to the guy on the phone from india On hearing this news I had a ...
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How to recover the original file content after using Script command on the file in Linux

I have a file named file1.txt in Linux.  By mistake, I used the script command, script file1.txt its goal is to add all the terminal output to the file1.txt.  Now file1.txt is with unreadable ...
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File permissions and NFS (how to replace samba?)

I'm trying to replace Samba with NFS, but I need the equivalent of create mask, directory mask, force create mode, force directory mode, force user and force group options. I read this: Forcing group ...
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How to disable Gecko package popup for Wine?

When I run my app under Wine: wine my_app.exe I've got this annoying popup: which says: Wine could not find a Gecko package which is needed for applications embedding HTML to work correctly. ...
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Installing bootloader on a mac

Due to a somewhat odd requirement for a particular linux installation, with a particular software suite, I found it best to use ddrescue to populate the harddrive with the partitions and their data. ...
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How to get stdout of a “lost” session

I don't well what's the name of the situation, I think yesterday I closed a session with a background ipython process, but I am still able to connect to it (the process is running a web server and I ...
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How do I find out how long a command has been running for using time command?

I have a long mysqldump thats been running for over 2 days now (many 100s of GBs of data being archived). I started the command with time so that I could see how long it took when it finished. Is ...
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3 interface server - wap with bridge - how to route this?

I have the following setup (except the "server-addressed packets"-part): http://www.directupload.net/file/d/4062/jo9qswvv_png.htm Basically eth0, eth1 and a wap. eth1 and wap are bridged with br0. ...
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Auto Sync Linux clock

How to implement the automatic synchronization of clock (date and time) in Linux? What is the best mechanism? Googling, I've found this: ...
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add folder to path or copy symbolic links to existent directory in path?

I am running some script on a server, making use of environment modules: basically, when I load a module for some software, it prepends the path with the folder of the software. I am loading a lot ...
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Give CPU priority to certain process

I'm setting up a scheduled backup for my server. Sometimes it takes too much CPU and slows down other processes. Due to certain constraints I cannot change the schedule, and I'm wondering how can I ...
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Should I trust htop or top when it comes to RES memory?

I am writing a program to test some memory usage metrics on our systems and I want to hit a target memory consumption. You execute my program via meminflate.exe -G 103.1 if you want to take up 103.1 ...
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Minimal window manager for industrial control application with OpenGL + transparency

My company am currently working on a large graphical Linux PC based application for use on factory floors, controlling a specific machine tool. During development we test it on a full-blown desktop ...
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Linux: get the current boot disk's device name

When booting a machine by USB stick, sudo fdisk -l outputs you two devices marked with an asterisk, and you'll never know which was the boot device. I need a list of all disks attached to the ...
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Unable to launch matlab after installation

I have recently installed a copy of Matlab on my Linux Mint distro to a secondary hard drive. I have tried running it in different ways and none of them seems to work. I have tried using sudo, and ...
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How the internal pipes in linux work?

When I do ps , ps will show that in the list. But when I do ps | grep hello even though ps is the process , grep is the process shown. Is it that pipes work that way ? How is the pipe read fd closed ...
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Linux - How to stop a queued command

I have two terminals open: #1 dd command copying 128GB #2 Using Kill command to monitor dd process . I was repeating the monitoring command and accidentally repeated dd command in the second ...
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Shell script to get 2 diff files from 2 diff folders

Fetch all files from 2 different folders, If first file is from folder 1 and another file should be again first file from folder 2 at the same time, Similarly If Second file is from folder 1 and ...
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Can't mount Windows CIFS share on Ubuntu Server

I'm wanting to mount a network share running on my Windows Server 2012R2 server to a virtual Ubuntu Server 14.04 installation but am having zero luck. To elaborate on the setup, the Windows server ...
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Can't connect using ssh keys to dropbear

I have two pair of (same) embedded device that runs linux. I have setup the same ssh key on both. I can connect to one using that key but the 2nd machine still ask for password. Obviously I am doing ...
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Group of a user when running a setuid executable

If a user, user1 belongs to group1 and also a setuid executable exists that is owned by user1 and group, group2. user1 is not a member of group2. I am seeing that the executable cannot access files ...
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Intermittent boot failures - Linux Mint 17.2 (Cinnamon 64 bit)

About every 1/5 boots, my system, a Lenovo PC running Linux Mint 17.2 as the sole OS, will fail to boot. When this occurs, I have to power down and power up several times to get it to boot again. ...
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Unprocessed orphan inode list in VirtualBox VM

Recently while using my VirtualBox VM, the system crashed. Afterwords, the VM would no longer boot (I am using Vagrant). In my troubleshooting, I turned on the VirtualBox GUI and found that the ...
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Move partitions from pen drive to unallocated space in hard drive

I have built and installed Chromium OS on a pen drive following the instructions on this page. I can boot into the pen drive and use Chromium OS as if it were installed on my computer, I'm able to ...