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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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pdsh works well standalone, but doesn't work in script

I am trying to install hadoop via script on my small cluster [introduced in the book: Apache Hadoop Yarn]. I have set up ssh connect without password, and pdsh&pdcp are all fine if I use it alone. ...
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2 views

Maximum clients with USB hotspot

I already asked this in "Unix & Linux" StackExchange forum, and they advised me to ask the question here instead. So, here i am! I made a small access point using Hostapd, Dnsmasq and Debian ...
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Could not connected to shared internet from Windows 7

I run Debian 7 on my laptop. I was trying to connect to the internet shared from Windows 7 Desktop machine. I can see the Wi-fi connection on the available internet connection list. But it is grayed ...
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0answers
9 views

Create Linux swap on external USB 3

I have an external USB 3 HDD on USB 3 port on Debian, and I would like to create a swap partition on that drive - which drive also holds the partitions for databases and other high-volume stuff. My ...
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1answer
15 views

Disable numlock, preserving mouse button key bindings

I'm having trouble to disable the Numlock key (make the key do nothing, so that the numpad numbers always work) while at the same time mapping extra mouse buttons (at the side of my mouse) to ...
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0answers
6 views

Using Java in Chrome on Centos 7

I have installed java on my computer running CentOS 7. I've tried yum install java downloading the proper rpm for my bitness from java.com/en/download. I've also done as suggested in this how to ...
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1answer
6 views

How to prevent cups from timing out jobs

I upgraded from Ubuntu Precise (12.04) to Trusty (14.04) and now it seems CUPS times out jobs and automatically deletes them after exactly 3 hours. However I usually do not have the printer running ...
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0answers
19 views

Accidentally deleted hundreds of php files and directories on CentOS 7 via command line

Well, the first deletion mistake of my career has proven to be rather devastating. I deleted hundreds of php configuration scripts from my web application. It is now a fleet of boats having no ...
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1answer
9 views

install crontab every 10 minutes

I'm following the tutorial here on how to install a crontab every 10 minutes, but I'm running into an issue. My Cron is */10 * * * * /app/qa/dashboard/ec2/autoscaling-onesearch/manage check But ...
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0answers
9 views

Vinagre (Remote Desktop Viewer for GNOME) isn't working out of box(

I'm trying to use Remote Desktop Viewer to connect to remote server. I opened Remote Desktop Viewer, switched Protocol to RDP then entered my Host and my Username and clicked Connect. gnome-session: ...
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0answers
5 views

Disable autoconfiguration of new network interface on Linux desktop

I am running Ubuntu Linux (desktop) and whenever I insert an external network card to my computer, it automatically creates a new interface (that is okay) but also instantly giving the interface an IP ...
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0answers
5 views

Why does iptables port aliasing work with only a single rule?

I have a service running on a particular port, but in order to make it accessible via a more memorable port as well as the normal port, I added an iptables rule that acts as a port alias: iptables -A ...
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12 views

Switching to the New Desktop in Linux

I followed a guide to install the Cinnamon desktop on my Kali (Debian-based) system. I installed everything: apt-get install kali-defaults kali-root-login desktop-base cinnamon It went smooth with ...
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1answer
13 views

Black VNC for a new user

I setup a user from ssh, but when I tried to log in with VNC client, it gave me a black screen. VNC works well for other users. I tried to log in with root's VNC, and setup a new user in vnc. But this ...
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0answers
9 views

Is it possible to change php settings from the command line?

I have a vagrant controlled environment that uses a base box I don't have control over and is a near replica of our production servers, I do have control over the provisioning scripts, however, and ...
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0answers
5 views

In Fedora 20, $DISPLAY is unset after a kernel update. How can I permanently fix this

I recently updated the kernel (a rebuild that came through the usual update channels, nothing unusual done by me). I think the problem started here, but it might have been a coincidence. After this ...
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0answers
12 views

Installing Nvidia drivers on Red Hat

I am trying to install Nvidia drivers on Red Hat Why am I getting the following error: rpm -i NVIDIA_kernel-1.0-2880.rh62.i386.rpm error: Failed dependencies: kernel = 2.2.14-5.0 is needed by ...
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2answers
13 views

Linux Filesystem with either no discretionary access control (user/group permissions) or that can have it disabled

Is there a file system for linux that has no permissions? I have a folder that is shared between multiple applications and although they are all running in the same group, I am constantly having ...
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0answers
8 views

Installing Nvidia drivers on Red Hat

I wanted to install Nvidia drivers. Can you tell me why the following is not working : [root@INEICP-EPM-W134 Downloads]# rpm -Uvh XFree86-4.3.0-35.EL.src.rpm warning: XFree86-4.3.0-35.EL.src.rpm: ...
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0answers
11 views

Installing packages on multiple centos machines

I have to install standard package like java 1.7 in 40 of my lab machines which are connected over a lan. I know I can simply write a shell script to install something in user space of each system, ...
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0answers
10 views

Minimize PCR Jitter in mpegts stream

I am using ffmpeg for capturing desktop screen and creating mpegts stream. I am using following command. ffmpeg -y -loglevel warning -f alsa -ac 2 -i pulse -f x11grab -s `xdpyinfo | grep ...
3
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1answer
18 views

How to distinguish 'syscalls' form 'int 80h' when using ptrace

As syscall number is different in x86 and x64, ptrace can only get syscall number by PTRACE_SYSCALL. So is there any way to figure out where this syscall real origin? Actually,I know the syscall ...
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0answers
12 views

Postfix 'No route to host' even when port is set to 2525

All I want to be able to do is send email from my ubuntu server, I do not need to receive. Whenever I attempt to send an email to an outside domain such as gmail, the email never resolves and it stays ...
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2answers
20 views

How to kill a continuous process started from rc.local?

I'm working on a Raspberry Pi with Raspbian (Debian-based) OS. For testing I added such a command in /etc/rc.local: python /home/pi/test.py It works fine starting this script. But the problem is ...
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1answer
15 views

server randomly becoming unresponsive

I've been having a sporadic issue that seems to occur completely at random with one of our Ubuntu servers. The server will randomly decide to stop responding to connections on all services (SSH, HTTP, ...
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1answer
10 views

tar reverse of '--to-command', or: compressing tar entries individually, or: tar with plenty of large files

I would like to create tar gzip archive, but do it the reverse manner of what is most commonly done -- have the files in the archive be compressed individually rather than compress the entire archive: ...
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2answers
21 views

Protect certain files from being modified or deleted

I'm trying to expand my knowledge of Linux security and one thing I'm looking for is protecting select directories and files from modification, deletion, or alteration of attributes. I understand that ...
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0answers
11 views

Booting to liveCD with MacBook Pro 2,2

I am trying to install any modern Linux version on an old MBP 2,2 from about 2006. Previously I had Crunchbang Statler (basically Debian 6 w/Openbox). I am having no luck getting either a liveCD or ...
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0answers
11 views

Server drives gives input/output error when formatting in Fedora

I am at a total loss as to why this is happening. I have tried everything I can think of. I am trying to format a drive in Fedora to use in the server. Every time I try to format it I get a ...
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0answers
8 views

Php-cgi Server Load high Every Single Visit

I Get Big Big Problem I Am Using Virtual-min in My Dedicated Server My Server Configuration IS Intel Xeon E3-1230 3.20Ghz RAM:8GB Bandwidth:1Gbps I Am Using Varnish And NGINX I See Carefully ...
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0answers
28 views

How to create new localhost interface in Windows?

In *unix you can write: sudo ifconfig lo0 127.0.2.1 up But how to do this command line in Windows?
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1answer
23 views

How to apply only security updates on CentOS?

Ive tried what this article describes: yum install yum-security Next step is yum list-security but the result of this is: Loading mirror speeds from cached hostfile * base: mirror.anl.gov * ...
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0answers
14 views

Robocopy equivalent in Linux that supports Multi-threading

I personally love Robocopy for one major feature. The /MT command to allow multi-threaded connections. Is there an equivalent tool in Linux that provides the same functionality? Its really useful ...
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0answers
10 views

Linux Debian dual screen graphic card , screen on chipset not detected

I am trying to a dual screen on linux debian. I have one screen on the graphic card (HDMI) and the other one is linked to the chipset (VGA). The dual screen works fine on windows, on linux i tried ...
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0answers
18 views

Window Period Where Sent Packets Cause Socket Acting as Server to Malfunction

I am currently working on an embedded Linux server. My main application is a state-machine that is started during the init phase from the rc-scripts. The application spawns several worker threads. ...
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0answers
21 views

Can software circumvent the light on a laptop's built-in cam or is that isolated somehow?

I don't use my webcam much so I keep it taped over just in case I got a virus or something that could activate it without the light coming on. However, it's ugly and I'd like to take it off so it I ...
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2answers
42 views

Why do I add a path to ~/.bash_profile and source it, but there's no effect?

In my install.sh: # other commands to install java... echo 'export JAVA_HOME="/usr/java/latest"' >> ~/.bash_profile source ~/.bash_profile After this script runs, I type echo $JAVA_HOME, but ...
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0answers
10 views

I want to block the server used as proxy in iptables [on hold]

How to disable socks proxy incoming and outgoing request in Linux ip tables ?.
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1answer
24 views

Where do the variables of a new BASH shell come from?

I am puzzled as about how environment variables work. From what I am aware, for a new process to have some environment variables, its parent must have issued export. But what about all the variables ...
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0answers
6 views

Where are Iceweasel's configurations (headers) stored?

I would like to write a small script to modify some of the things Iceweasel sends in it's headers. I'm aware there are plugins for this but I would need some custom stuff. At the very least I would ...
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2answers
41 views

how to undo sudoers file

I accidently command the root admin and sudo in sudo visduo file. Now with current user it is not rolling it back because i can't access it any more. File does not get opened with command sudo visudo ...
2
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1answer
17 views

Why does Ubuntu mount the wrong partition as root?

I am messing around with a problem of Ubuntu mounting a backup of my root partition residing on a different disk as / instead of the real one. I think the problem has been triggered by a clash of ...
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1answer
16 views

Configuring samba on linux so that the network share does not need a login / password

I'm eager to use a raspberry pi as a low-load NAS, and I was reading the guide at: http://www.howtogeek.com/139433/how-to-turn-a-raspberry-pi-into-a-low-power-network-storage-device/ In the tutorial ...
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2answers
25 views

How do I permanently reset the UUID of a partition?

I have just started experiencing problems on my Ubuntu install with a (dd cloned) backup of my boot partition - residing on another drive - "taking over" the root mount when booting. So I have, from ...
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0answers
33 views

I accidentally deleted files of root folder

Now my root folder is looking empty.And I lost my shell string (same as: I accidentally deleted my /root folder and now my shell string is different. What gives?) What should I do now ? I created ...
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0answers
5 views

How to forward DHCP broadcast messages between two interfaces using ebtables?

I have two interfaces, WLAN and LAN, on my linux system. How can I "forward" DHCP broadcast messages received on WLAN to LAN using ebtalbes?
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4answers
76 views

Install linux on computer that can't boot from USB, but no CD/DVD available

I have a computer (A) that I want to install linux on. The bios on A does not recognize "booting from USB". I do not have access to a CD or DVD to create a boot disc. I do however have access to other ...
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1answer
14 views

Unknown characters in LXTerm terminal on Arch linux

I am trying to learn node.js using the learnyounode node from http://nodeschool.io on an arch linux machine running LXDE. I am using the bundled LXTerminal to execute it. However, when I run it, see ...
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0answers
13 views

Unable to find linux-headers-2.6.32-amd64 for installing VirtualBox

I tried to install virtualBox on my Debian Server, but each time I try to start a virtual machine it tells me to do /etc/init.d/vboxdrv setup. Whenever I try to use this command it tells me this: ...
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0answers
8 views

Why doesn't ruTorrent/rTorrent respect my ratios?

I have set up my ratios such as this on ruTorrent (3.6) and rTorrent (0.9.3) : When I add torrents they stop at the 2.0 ratio as they should. If I want to seed more once it was stopped and assign ...