Questions specifically about Linux, as opposed to Unix-like systems in general, or to questions about a specific distribution or program.

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0
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2answers
8 views

Run `dbus-send` in a remote system

I'm trying to run dbus-send in a remote system but somehow I'm not able to run it. But the same dbus-send, if I run it in the local system, is working fine. COMMAND: ssh remote@xx.xx.xx.xxx ...
0
votes
0answers
13 views

disable automatic update clamAV

How to disable clamAV automatic update? I read /etc/clamAV/* but there is no config about automatic update.
1
vote
1answer
21 views

Why IP address for Linux Bridge which is layer 2 virtual device?

Shouldn't bridge (or a switch) be working without having an IP address? I believe I can have a bridge br0 setup with eth0 and eth1 as members both having no IP addresses. I can't understand why an ...
1
vote
0answers
14 views

Why was n't kqueue socket polling mechanism not implemented in Linux?

Linux has epoll for socket polling mechanism. kqueue seems to be better than epoll. Why did linux went with epoll rather than kqueue? I read about libkqueue. But that is implemented in user space and ...
-1
votes
0answers
15 views

Switching between two ISP [on hold]

I am managing my college's server. We have two Internet Service Providers- BSNL(1 GBPS) and Reliance(75 MBPS).when BSNL line is slow than Reliance it should automatically switch from BSNL to Reliance ...
0
votes
0answers
10 views

PID of process causing error

I have this script: #!/bin/bash # -> dump.$pid ulimit -c unlimited # trap ERR set -o errexit # also trap error in the middle of a pipe (1) # otherwise it will only trap the error on (2) set -o ...
0
votes
3answers
46 views

How do I delete a folder but not the contents?

My directory (in Linux) looks like com/com/{various,files} where com and com are folders of the same name and the second com holds the various files. I want the first com removed, but the second and ...
0
votes
1answer
41 views

Debian: Can I remount / read-only in single user mode?

I'd like to use fsarchiver in the safest way possible but have no live medium for booting from. I vaguely remember having read something like this though: Is it possible to remount / readonly when in ...
1
vote
2answers
36 views

How to check if disk has linux inside

I am trying to boot a external USB drive which runs Linux to check whether the main computer hard drive is running (so it contains) Linux or not, and mount it into /mnt directory to modify some files. ...
0
votes
1answer
15 views

Disable MySQL startup arch

how to Disable or prevent mariaDB or mysql services and deamons to start at system startup? more information i have manjaro (arch base linux). i have KDE. and it have Autostart software to manage ...
0
votes
0answers
19 views

Can't find picture-box in QT c++GUI application [on hold]

Till now I was working on visual studio on windows , now decided to move on Linux. I Ubuntu I just start working with QT-5 for GUI application. Here I am not able to find picture-box in C++ GUI ...
0
votes
1answer
12 views

Error when I try to init gentoo, Loading init ramdisk

I installed the gento acoording to the hanbook, but when I reboot my system I've a mistake, Just I can see the following Loading init ramdisk... and no more. I believe that my trouble is in the ...
0
votes
0answers
36 views

Mysterious Reboot Preventing Debian from Loading

I recently picked up a cheap, oldish computer at a yard sale. It contained a 80GB SATA hard drive with Windows XP, but I want to turn it into a LAN FTP server, so I tried to set up dual-booting Debian ...
0
votes
2answers
24 views

how to stream a video (mp4 file) [on hold]

I planned on streaming just a specific video, is this possible? I'm using Arch Linux, and would try to stream this video to connectcast
0
votes
1answer
9 views

FS wont mount at bootup and when using certian commands [on hold]

I am using this line below in my fstab file to mount sda2 but I am having some problems mounting it. At boot up it fails to mount. If I run mount -a it fails to mount. Says I need to be root, which is ...
0
votes
1answer
12 views

iozone runs fail with “No such file or directory” errors

I want to start using iozone to benchmark an aufs filesystem on a virtual machine on ubuntu. I tried following the manual to use relevant parameters, but I keep getting a weird error on most runs. I ...
0
votes
0answers
25 views

Calling executable file through the network [on hold]

I am running on Linux and want to call and execute one binary file upon a HTTP request or through the network. the webserver is appweb (it can be apache or tomcat, I know I can use CGI or servlet), ...
4
votes
0answers
37 views

How can I get this proprietary low-vision camera working in Linux?

I am a visually impaired Computer Science student, and use a special USB camera to zoom in on the board/projector during lectures. The camera only officially supports Windows, and I've been using it ...
1
vote
0answers
5 views

xvfb-run aborting on cluster

I'm trying to run a python script with xvfb-run on a cluster using SLURM; when I use an interactive session (srun) it works fine, but when submitting to a queue (sbatch) it aborts/fails without much ...
-1
votes
1answer
25 views

Best vim setup for my workflow [on hold]

I am using vim as my primary editor for programming (doing ssh on a remote server). I have tried some plugins for being more productive in programming but I always had issues (example: snipmate ...
-1
votes
2answers
36 views

How to monitor TCP connection failures in Linux and UNIX [on hold]

Describe how to monitor the number of TCP connection failures in Linux and UNIX
0
votes
0answers
26 views

Cannot install Kali linux [on hold]

I am trying to install kali linux and I cannot do it. It is giving me this error saying "An installation step failed, You can run the failing item again from the menu or skip it and choose something ...
0
votes
0answers
15 views

Gettting Unexpected Error during the testing of GCC-4.8.2 package in LFS 7.5

I am building my first LFS 7.5 using Linux Mint-13 (32-bit).While testing the 6.17. GCC-4.8.2 .I am getting the following error : root:/sources/gcc-build# ../gcc-4.8.2/contrib/test_summary cat ...
0
votes
1answer
22 views

how to bootup/reboot in verbose mode?

I have Ubuntu 14.04TLS. How can I permanently change grub to switch to verbose mode on bootup/reboot so I can see the rolling text? I would like to make this change stick. Thanks!
-1
votes
1answer
29 views

How to diagnose the problem when Apache at random times shows “Not Found” on the web?

Suppose I reload my web site 100 times by holding down Ctrl+R on my keyboard. I notice once in a while Apache throws out a Not Found error message. If I refresh again, everything works normal ...
0
votes
0answers
25 views

GeForce GTX 660 as passthough device with KVM : error no iommu_group for device qemu-system-x86_64

I'm tryng to use my GeForce GTX 660 as passthough device with KVM. I'm reading this guide : http://www.pugetsystems.com/labs/articles/Multiheaded-NVIDIA-Gaming-using-Ubuntu-14-04-KVM-585/ I'm ...
0
votes
0answers
12 views

Problem configuring Access Control on Apache

I have a little Debian Server which runs Apache 2.2.22. I have configured, with WebMin, a Apache Webserver that listens on the port 83. Now, in the root directory of this Webserver I configured the ...
4
votes
2answers
28 views

Could you explain this “chroot” /tmp directory creation?

In the following linked article they explain how to create a "chroot" /tmp directory. I'm a bit confused by what they did. Could someone explain what the following commands are doing? Noexec and /tmp ...
6
votes
2answers
93 views

Are environment variables visible to unprivileged users on Linux?

I'm trying to determine if, in Linux, environment variables for a process are observable by other (non-root) users. The immediate use case is putting secrets into environment variables. This is ...
-1
votes
0answers
21 views

what assembly code formate do i need to use? [on hold]

why there's assembly code that is divided to section like: section .text and others are not but they have org 100H instead and how do i know what format to use ??
1
vote
1answer
24 views

Why I get status: Unknown job on the service?

I followed this tutorial to add a program to init.d as a service (I guess), when I want to see its status with: sudo status /etc/init.d/noip2 I get : status: Unknown job: /etc/init.d/noip2 What ...
1
vote
2answers
27 views

how to scp to host connected on a wifi?

I have my MAC on a wifi and am connected via ssh to a linux host. I want to copy some files from the linux host over to my MAC. I know, I can simply run scp on the mac to fetch each file via mac> ...
2
votes
1answer
23 views

How interpret kworker threads names?

On a Linux kernel 3.11.0-13-generic running on top of a dual socket Xeon X5650 hexa core board running htop show different kworker threads. Sorted by names (I tweaked the result I am showing here a ...
-1
votes
1answer
21 views

How to edit all Apache's error codes DIRECTLY instead of using httpd.conf?

When a page does not exist.. this is what i see on the web : Not Found The requested URL /test was not found on this server. i know about : ErrorDocument 404 /test.html but i rather not use ...
1
vote
1answer
14 views

Grub-customizer: error while loading shared libraries: libarchive.so.13: cannot open shared object file: No such file or directory

I wrote this question at stackoverflow and got recommended I prob would have a better shot here. So I'm trying to install grub customizer so I can make Windows the default OS to boot since I use that ...
4
votes
3answers
375 views

Why can't I `tail -f /proc/$pid/fd/1`?

I wrote a simple script which echo-es its PID: #/bin/bash while true; do echo $$; sleep 0.5; done I'm running said script (it says 3844 over and over) in one terminal and trying to tail ...
2
votes
1answer
34 views

Memory Usage in Linux [duplicate]

How to setup limit for process to memory usage? Similar to open files limit in /etc/security/limits.conf: ubuntu soft nofile 4096 ubuntu hard nofile 8192 ...
1
vote
2answers
276 views

Safely removing flash USB drive

On CentOS (5.5 and others) I need to transfer quite big files to a FAT32 USB flash drive to get the data on a Windows 7 machine (each file is below 4GB, so I guess FAT32 shouldn't be an issue then). ...
2
votes
1answer
36 views

read specific lines from the file [duplicate]

I have some text file (for example json). I can use head order for the reading of the first lines. For example: head -n 100 file.json get me 100 first lines back. What is Linux order, which I can ...
-2
votes
0answers
17 views

Linux (Xubuntu) ram and cpu usage [duplicate]

I'd like to know if Linux is able to see and use all available ram and cpu. The reason why i ask is because in my Macbook for example i can not add more ram because it can read and use just 2GB, it is ...
1
vote
2answers
32 views

make an application startup automatically

I'm new to linux. Here I have an application deployed to linux, I want the app to startup automatically when the linux start up. I'm using an command like 'sudo ./start' to start the application. How ...
-3
votes
0answers
37 views

What are alphanumeric characters? [on hold]

What are alphanumeric characters in Linux? Are characters like !, $, % etc., alphanumeric?
1
vote
0answers
26 views

sshd suddenly wants a passphrase from Linux box, but not from windows (putty)

My Amazon EC2 instance running Ubuntu is no longer letting me ssh in via my local Linux system. I haven't changed a darned thing on either side but now it wants a passphrase and says nope when I ...
4
votes
3answers
256 views

How to disable beep sound in Linux CentOS 7 command line? [duplicate]

I just installed the basic Linux CentOS 7 (no desktop) and am experimenting with the system. Every time I make a mistake (entering things that the command line doesn't like), the computer beeps and ...
2
votes
1answer
18 views

Understanding passwd --keep-tokens

On GNU/Linux, I do have trouble understanding the meaning of the --keep-tokens option for passwd. As it doesn't seem to be much used as I am not able to find any examples and only online copies of man ...
0
votes
0answers
8 views

How to use scanner drivers api in Linux shell script

Usually when scanning any page using Canon DR- 2050C scanner in windows it rotates vertical text paged to horizontal automatically for the easy reading of the user. In Linux we are manually scanning ...
0
votes
0answers
3 views

How to increase horizontal and vertical default spacing between icons on desktop at EL6

I have installed centos 6.5, by default icons are appearing very near to each other on desktop. From where I can increase space between them? Any clue? Which file is recommended to modify manually, ...
0
votes
0answers
41 views

How to stream from router-connected USB NAS to latest Linux Mint laptop? [on hold]

I started using Linux Mint on my laptop, I dumped Windows. I love it, found Cinnamon very easy to use. How do I stream movies from the USB NAS (WD passport) that's attached to my router to Mint? I ...
2
votes
2answers
40 views

netstat — why are IPv4 daemons listening to ports listed only in -A inet6?

I have a computer with: Linux superhost 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux It runs Apache on port 80 on all interfaces, and it does not show up in netstat -planA inet, ...
0
votes
0answers
40 views

Why might debian become unresponsive with virtually 0% CPU usage? [on hold]

We have a problem with one of our (virtual) Debian servers failing in a strange way. The server will stop responding to to the network (no SSH, no Ping response, no app response). The only way we ...