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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How do binary files run on different machines?

I always wondered about how executable binary files actually work. Compilation is always stated as taking the source code and translating it to machine language But what does that really mean? ...
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Make files which starts with a dote visible for every user

I'm trying to delete an uploaded Dropbox directory, but only receive "550 Access Denied" and i don't know why. I already tried to set the directory permissions to 777 but nothing changed. On the ...
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Missing xterm-256color and screen256-color entries in terminfo

The results are confusing when searching for xterm-256-color and screen-256-color in terminfo. Looking for xterm-256color, i get xterm+256color. What's the difference between the two, one with "-" ...
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sub folders access to multiple groups

I Have a shared directory Department, it has 3 sub directories department wise Account, Sales, Presales and each sub directory have there department employees directory in the same like acc1, acc2, ...
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Failed to Start DHCP in Linux Redhat, Need Help ASAP

I tried to configure /etc/dhcp/dhcpd.conf file in Linux but it failed as static addressing. How do I fix it? Am I missing any data and is it accurate? I need help. Below is screenshot of my contents ...
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Finding a file based on who owns it and size (Linux)

Im looking for a file on a server. I know what user owns it, I know what group owns it, and I know its 33 bytes long. Im not sure where on the server it is. What is the best command I can use in ...
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passsenger: Apache 2 Test Page shown instead of rails application

I have installed centos and rails using a tutorial The problem is, the browser shows "Apache 2 Test Page" instead of the rails site. Any idea how to troubleshoot this.
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22 views

Can I Soft-Link files from my desktop to a server in Linux

I am looking for creative ways to sync my vim files (~/.vimrc, ~/.vim/) on the server I am running. Can I soft-link files from my desktop machine (Fedora) to any of the nix servers I am on?
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12 views

Default save location for different OS

I am making a web application that needs to save files on the client machine. The problem is that the client can be using different types of machines/OSes. I need to hard code (I think) a pathway to a ...
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1answer
10 views

LightDM accepts password once, and never again

I'm running Ubuntu 14.04. Fresh install, although I'm pretty sure I'm going to need to reinstall after this problem is resolved. When I first start Ubuntu, I get the LightDM login screen. That ...
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Opening serial port with 'cu' command not running from rc.local

I am trying to run this command from rc.local: sudo cu -s 19200 -l /dev/ttyUSB0 > /home/pi/bticino/assets/bash/serialContent.json It doesn't work at all, there is nothing related when I run ps ...
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How to check if my ISP let GRE traffic through

is there any way to check if my ISP is letting GRE traffic through? I have some issuses with PPTP VPN server. From the server side everything seems to be ok. But whenever I try to connect from my PC ...
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Where to add a new sudoer in vCenter?

Currently, in vCenter, I clone new VMs using an Ubuntu 14.04 template and a SimpleLinux customization spec. I now need to add a new user (newuser) and configure it to be a sudoer in /etc/sudoers like ...
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14 views

Finding a file of specific length in directory (linux)

I have twenty directories and im looking for a file with a known length somewhere in one of the directories. Is there a Linux command to search a directory for a file by size? What is the best ...
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6 views

Btsync: only three of five shares synced

I try to sync 5 shares from a Win7 computer to a linux box. The Linux box is configured by the following config. I experimented quite a bit with the settings but I only can get 3 of five shares ...
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7 views

keymap swap underscore and dash

I have noticed that when coding I type underscores much more often then dashes. Is it possible to swap these keycodes so I can type shiftless underscores? I am using linux (chromebook developer mode). ...
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1answer
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Vim marks and US international keyboard

I use a US-international keyboard so that pressing 'a produces "á" while on insert mode. However, I would like to access a mark named a by pressing 'a under normal mode. That doesn't work and as a ...
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10 views

Complete yum history

When I run yum history I get a list of the last 20 yum operations. If I didn't clean my history, is there a way to get a full list? Does yum only keep track of the last 20 operations? Is there a ...
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Transferring Linux OS from one drive to another with different partitions

First of all, some related questions: How to move from one drive to another that's a different size? What utility can move my Windows boot partition over to another hard drive? My situation is as ...
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1answer
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Qemu user mode networking doesn't work

I try to use network in guest system. I installed an OS in a virtual machine, but I did not get the network configured. When I try to ping, for instance google.com I get the IP address for the domain, ...
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Linux base device not getting shutdown

I try to shutdown my embedded system running with Linux environment using shutdown -h now. But in place of shutdown it is rebooting my system again. So can anyone give me suggestion how to shutdown my ...
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How to give mathmatical command to linux terminal [on hold]

I am doing cprogram in linux terminal.I don't know how to give mathimatical command to it like squar root.
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1answer
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Why there is an empty line begin with “*” in the result of history command on linux?

Today at work, I wanna know a history command which I am not very familiar with and I was sure that I just executed a little while ago. However, when I ran history on the same terminal window, I found ...
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what command is used instead of #define in linux terminal

I am doing a program in linux terminal . I had a problem while doing a program.When I am giving command #define it not giving out put.So what is the command is used instead of #define.
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How can I apply a konsole colorscheme from a non default location

I need to change konsole colorscheme from a profile stored in a non-default location using the command line. The reason is that users will have their shell colour set based on the project they are ...
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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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AMQP connection closed when cells are enabled on Devstack

I have set up Devstack on 3 servers having IPs 10.10.1.51,10.10.1.53 and 10.10.1.54 which are running on Ubuntu 12.04 LTS I configured the devstack on server 53(IP 10.10.1.53) as the parent/api cell ...
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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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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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1answer
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Using su with screen

When I am under one of my user-names, I can fire off, say, screen -S -p 0 -X eval 'stuff "say command"\015'. However, I cannot su username screen -S -p 0 -X eval 'stuff "say command"\015'; it ...
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What's faster: Running a Windows virtual machine on Linux or running a Linux VM on Windows? [on hold]

I've searched the internet for this and I don't think I've been able to phrase the question concisely for any search engines, so I'm turning to people! I've got a laptop and I would like to know what ...
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How to apply a kernel patch from lkml?

How do I patch the kernel from a patch from lkml? Specifically this link : https://lkml.org/lkml/2014/5/9/517 I am running debian. I know how to roll a deb package, but I can't figure out how to do ...
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Configuring Apache with PHP-FPM, Apache failed to start

I followed this guide to configure PHP-FPM with Apache on my server but after I restart Apache successfully: [root@localhost vhost]# service httpd restart Stopping httpd: ...
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PuTTY remote command containing while loop

I am attempting to automate several common tasks that I SSH into a remote server to do. For this, I am using PuTTY and its "remote command" option (Connection > SSH) in several saved sessions. My ...
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48 views

Driver manager for Debian Wheezy

Today I installed Debian Wheezy 7.6.0 amd64 to my laptop Asus but now I can see that the screen resolution is not as it should be the icons are too big and mouse works not exactly as expected etc I ...
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which method should be used to install python modules on Linux?

Python modules can usually be installed via, among others, pip the package manager (yum, apt-get, ...) Which one is it wiser to use? Can I mix both? I understand that removal is dependent on the ...
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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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Lenovo T400 virtualization fails despite set in BIOS

T400 virtualization fails despite set in BIOS I found this post http://forums.lenovo.com/t5/ThinkPad-Edge-S-series/Hardware-Virtualisation-on-E520-with-i5-2540M-2-6GHz/td-p/608633 when I searched on ...
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1answer
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Linux keyboard macro X11

I'm using debian linux with X11 and dwm as a window manager. I have an application that make me press the same key three times in a row, I want to automate this, so instead of pressing three times I ...
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How can I copy files from a Google Cloud Compute Server to my local machine

I'm trying to download all of the server files from Google Cloud Compute (running Linux Debian). I'm extremely unfamiliar with SSH and Google Cloud Compute as a whole. I'd prefer either copying all of ...
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Linux Kerberos 5 server services and utilities stopped functioning: hash: could not retrieve header

I have been installing Kerberos 5 server on RHEL6 for some integration work. Installed yesterday and created admin principals which all seemed to work. Today I stopped the services, before trying to ...
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Linux ALSA: No sound out from internal speaker

There is no audio output when running "Test Speakers" in Sound Preferences -> Hardware -> pcsp. The internal speaker worked fine under Windows. Sound can, however, be heard when headphones or a ...
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Create user to execute select tasks

I would like to allow a application user to perform select sudo or root tasks without the need for sudo or root permissions or password being entered. Normal (Prompts for password): sudo appuser ...
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1answer
20 views

grep: Invalid back reference for date expression in tcsh

I googled for the following error, and didn't get any great explanations as to what was going on with grep under tcsh. (Yes, that date expression exists in the log files). $ grep '2014-07-21' *.log ...
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1answer
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Why does 'export foo=1' not get read when I use ssh?

I'm trying to set a remote environment variable explicitly in an ssh command: ssh worker-2 "export OPENBLAS_NUM_THREADS=1; echo $OPENBLAS_NUM_THREADS" Strangely, this prints just a blank line, but ...
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Vim can break file permissions?

I was using Vim the other day as usual, when I noticed something strange. Here's what I did: ~$ touch testfile ~$ ls -l | grep testfile -rw-r--r-- 1 username groupname 0 Jul 23 10:00 testfile ~$ vim ...
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Trying to rsync and use sudo on other end

Scenario: Mac OS X Machine - old computer - user: john.doe Mac OS X Machine - new computer - user: john.doe Goal: Copy /Users/john.doe/Desktop and /Users/john.doe/Documents via rsync Problem: ...
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Keep Synergy client in full-screen when unfocused

I have a dashboard setup that runs a Web browser in full-screen mode on Linux. I'd like to use Synergy to control it with my main computer's keyboard and mouse, but whenever I mouse out of the ...
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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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printing in window 7 client using Ubuntu print server

I want to share a printer under Ubuntu 11.04 with Windows 7. I have installed samba and configured it to allow the printer to be browsed across the network. I have also enabled printer sharing. But ...