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 to install Cygserver

I'm programming in UNIX, so I'm using Cygwin. But functions of IPC does not work on it, just in Cygserver. How can I install it? I'm looked in google and did not find any concrete information. Thanks ...
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1answer
3k views

ext4 vs btrfs performance on SSD array

I am observing something that I cannot explain. I am trying to come up with a good filesystem configuration using HP P420i controller and SSDs. Out of curiosity I have tried BTRFS (still unstable so I ...
2
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2answers
863 views

Linux (Ubuntu) USB Auth

I want to be able to authenticate with PAM using a USB drive with a file on it. I've read about how to do this with a PAM module that reads the specific USB hardware ID of a device, but if the device ...
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0answers
14 views

Accidentally deleted dpkg folderr in ubuntu 12.04

I am accidentally deleted var/lib/dpkg folder in ubuntu 12.04 system. Someone please help how to resolve it. Advance thanks.
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3answers
178 views

What are Linux kernel modules?

I was wondering if someone could explain what Linux kernel modules are to someone who comes from Windows?
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1answer
3k views

Which process is using a Linux kernel module?

I am trying to run this command: # rmmod nvidia But I get: ERROR: Module nvidia is in use How can I know which process(es) is/are using the nvidia module?
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1answer
111 views

How Do I Manage Multiple Kernel Modules by the Same Name?

I have a situation where I have two modules both named cxgb3 and both in /lib/modules/. How do I inform the OS which one to prefer? Consider this example: $ find /lib/modules/ -name cxgb3.ko ...
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2answers
4k views

Skip kernel module at boot

There is a broken kernel module, due to which I can not even load the OS, so I can not delete or fix it. Is it possible to skip this module at boot, using the kernel's parameters or something?
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0answers
12 views

RHEV / KVM - backuping of running VMs

Is there any way or known script / how-to / tools to backup running VM (using VM snapshot and than merging snapshot file with VM disk)? I need to backup running KVMs without downtime and simple copy ...
0
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1answer
9 views

how to get the missing file sha256?

I am trying to run some script on Linux Ubuntu Precise Pangolin (12.04), x86_64 machine, and it complains that the file /sbin/sha256 is not there. I can setup in the script, where that file is, so ...
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0answers
48 views

RHEL reboot takes 26 hours [closed]

I am working as a developer in a website development firm. We have many servers and each one is attached to the load balancer. Yesterday (Apr 19), one of our Linux proxy server's CPU load were ...
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3answers
55 views

SSL Root CA certificate is not recognized, although present in the trust store. Why?

Background: Ubuntu Server 14.10 64-bit on aws.amazon.com/ec2 Cheap PositiveSSL server certificate from COMODO 1 server certificate, 2 intermediate CA certificates and 1 Root CA certificate as ZIP ...
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0answers
32 views

How do I repair Android DHCP issues? [migrated]

My phone plan comes standard with a lot of data and as a result, I've been regularly using the Mobile Hotspot feature built into it, on my laptop. The phone is a Samsung Galaxy S5 and is rooted on a ...
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3answers
32 views

No path, or command history through SSH when logged in to server as someone other than root

When I SSH into a server, as anything other than root, it only shows a $ and not the path. It also won't allow me to press the up key and see the command history when I don't SSH in as root. How do I ...
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1answer
3k views

What do these error messages mean and how to fix it?

============================================================== actually I figured out this is an issue of intel video driver:http://lkml.indiana.edu/hypermail/linux/kernel/0902.3/01703.html ...
1
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1answer
50 views

Ubuntu AMD Graphics card Drivers (AMD r9 275)

I have a Lenovo y40-80 with an AMD Radeon R9 275 graphics card. I installed the AMD Catalyst Control drivers on Ubuntu Gnome, but in my settings it says my graphics card is a TROPO XTX (6820). Here ...
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4answers
503 views

Launching programs with GUI without display manager

I've heard that there is a way launching programs with graphical interface without display manager - straight from terminal. Is this for real and if so, how can I do that?
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1answer
19 views

Two Vagrant VMs caused network issues

It seems that when I make a new virtual machine, my private networks are not reachable from the host. I assigned different IP addresses to both, and included them in my /etc/hosts file, however I'm ...
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1answer
1k views

Issues with Network interface card in CentOS 7

I have just installed centOS in machine having 4 NICs. CentOS detected 2 of them but two or them are still missing from network manager. Both two of them are of same kind, I suspect that it's a driver ...
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9answers
41k views

How can you see the actual hard link by ls?

I run ln /a/A /b/B I would like to see at the folder a where the file A points to by ls.
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2answers
3k views

Creating a USB stick for installing centos 6.x using DVD1 and DVD2 iso files

First, we create 2 partitions on the USB stick that is let's say 16GB. first partition is let's say only 1GB and the second partition is the rest of what is available. after we "w" write the ...
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0answers
20 views

Ubuntu as a separate OS v/s Wubi

Due to some hardware problem, I am unable to use both my DVD drive and the bootable USB stick to install Ubuntu as a separate OS alongside Windows 7. I came across WUBI. I was wondering if there would ...
0
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2answers
25 views

How can I create a shell script shortcut?

I'm using Debian and there's a user who has a script called start.sh. I want the user to be able to call the script by typing application ... instead of ./start.sh ... I've been playing with symbolic ...
1
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1answer
53 views

ubuntu 14.04 trusty: 'apt-get install' silently refuses upgrade package with unsatisfied dependencies

I think, this question is about the same problem. That question is marked as answered, although the problem isn't solved, so I open a new question with little bit more details. Short description: ...
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0answers
23 views

Very high write latency with Intel 530 180GB SSD and Ubuntu Server 15.04

I just put together a new "server" with an Intel NUC5i5MYHE, an Intel 530-series 180GB m.2 SSD, and 16GB RAM. I am having a rather severe problem with writes to the SSD having very high latency. The ...
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1answer
15 views

Slow SMTP connections to Google memory overload ( Controlling Exim timeouts)

Our organization has several servers that generate and send out lots of emails (we're not spammers, it's legit email to users who have asked for it). Exim on these machines is configured to only try ...
3
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2answers
5k views

Monitor Postfix outgoing mail delivery

I'm using GNU Mailman with Postfix to run a mailing list, and would like to monitor the delivery of outgoing mail, that is: for each mail sent from the list, check whether a 250 (OK) message was ...
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0answers
26 views

Can the kinect 2 be used in linux?

I know there are open source implementations available to program Kinect version 1 applications in linux, can Kinect version 2 be used in these as well. or are there any other methods to use kinect v2 ...
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0answers
24 views

How to install Windows 8 after Linux with UEFI

I have an Asus Zenbook UX32LN with Linux Mint installed on the whole 256GB SSD. How do I install Windows 8 alongside Linux ? The first step is of course to make a new big-enough partition for Windows ...
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3answers
4k views

How can I register a custom protocol with xdg?

I've been struggling this morning trying to associate an application with a custom protocol, namely emacsclient and org-protocol. I'm calling this protocol from a webbrowser bookmarklet, and I get ...
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8answers
7k views

How can I move files from Windows to Linux using WinSCP?

I have putty and winscp, but winscp doesn't work in this case because I need to use a command cd ../public in order to enter the directory as I can't find it for some reason. How would I use putty ...
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0answers
21 views

Run Java code in Linux Server [closed]

I have developed a code in JAVA in windows with eclipse. I need this code to run in a regular basis(to be added in cron). I don't see Java installed in my server to run this code. Where could i start ...
2
votes
1answer
3k views

Sharing a Windows 7 wifi connection with a Raspberry PI

I have a Windows 7 PC that is using a Wireless network connection that I want to share on the PI. I have a working CAT 5 cable that I am using to connect the Win 7 PC to the PI. I have configured ...
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1answer
4k views

Can't get 1440x900 resolution with GRUB2 although vbeinfo says it's available

I'm trying to use GRUB2 in graphical mode with 1440x900 resolution, but the result is always garbled nonsense: the highest resolution I can get is 1280x800. Word is from googling that long as vbeinfo ...
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2answers
34 views

What is the default timezone in a typical Linux (if any)?

I am administering a CentOS 6 Linux OS. I want to remove all explicit timezone information where such information may cause anything but UTC timezone for the system. This is because it is a template ...
0
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1answer
21 views

du command not displaying correctly

I've been trying to get PHP to list the size of a directory for a while now. I can't seem to get it to work. I've tried a few other solutions and the only thing that works -somewhat- is the du ...
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2answers
38 views

Install Sailfish OS on Lenovo Yoga 13 [closed]

I have two SSDs in my Lenovo Yoga 13 and would like to install Sailfish OS by Jollaon the second SSD next to Windows 8.1. Is there an x86 installer image?
1
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1answer
7 views

Link-local (zeroconf) networking with multiple hosts/interfaces

I have a machine (hostname foo) with two wired network interfaces, eth0 and eth1. When I connect another host bar to one of them (eth0), I can see in either one's NetworkManager that it's using ...
4
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0answers
1k views

Poor image quality and high CPU usage while streaming in high resolution using webcam and VLC in Linux

I'm trying to do some some streaming with a webcam, but so far the results are not good: everything I stream in 320x240 looks good, but as soon as I choose a higher resolution, the image quality gets ...
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0answers
8 views

Unable to login to Openvas

I am running Ubuntu 14.04. I have installed OpenVas from Mohammed Razavi's ppa. I have added the ppa by apt-add command, and followed the instructions described on page. Now, when I try to login using ...
13
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2answers
2k views

How to reuse/extend etckeeper's metadata engine for git control of non-/etc filesystems, or extend git natively with said capability?

Overview + question I want etckeeper-like filesystem metadata control for non-/etc, git-controlled directories. Home and web-app directories, among others, are classically sensitive to metadata ...
4
votes
2answers
4k views

Why does pinging a local router return “Destination Host Unreachable”?

I have two tomato routers. One is bridged wirelessly with the other. I have a new server on the network. It's running Ubuntu Server 11.04. They are all connected like this: A - Linux PC B - New ...
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2answers
41 views

how to install .tar.xz file in ubuntu

i am new in linux. i downloaded a vlc .tar.xz file. then searched Internet how to install .tar.xz. But unable to install. The command i written and result got given below.. ...
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1answer
21 views

How to increase delay of ssh root access every time login fails

Is there a way in Linux to delay, for example double the delay time, of the ssh root access every time an ssh root login fails from a given IP and them let the delay expire after X minutes of no login ...
0
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0answers
24 views

Open MPI: max processes on a single node

I am using openMPI (ver 1.6.2) on a CentOS 6.6 cluster. I am trying to find ways to increase no. of processes on a single node using OpenMPI. Each node on my cluster has 20 cores. I trying with a ...
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0answers
8 views

PCMCIA card under linux

Is it possible to use STLAB 10/100 PCMCIA LAN card under linux? From linux live CD?
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7answers
21k views

Sudo - is there a command to check if I have sudo and/or how much time is left?

(Originally posted on Stack Overflow. They suggested I try here instead. Here's the original post: ...
0
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1answer
9 views

GNU Screen equivalent for X11 aplications [duplicate]

What is the X11 equivalent of GNU Screen for X11 applications? I know there is VNC, possibly RDP and other candidates, but last week when tuning up my VNC config I've stumbled upon a project, that was ...
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0answers
17 views

How to properly unmount AUFS filesystem used as root filesystem

I have an embedded system that has an (always) read-only root filesystem with a writeable filesystem overlayed on top of it. However, I'm having problems on system shutdown unmounting or remounting it ...
14
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10answers
29k views

Filesystem full: how to find the biggest directories or biggest file? [duplicate]

Under Linux, I'm looking for a command to list the biggest file and/or the biggest directories under a directory.