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

learn more… | top users | synonyms

3
votes
0answers
7 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 ...
0
votes
0answers
11 views

Terminal freezes after using tar or gz

On Linux withing BASH the Pseudo Terminal window (terminator) as well as the Terminal itself "freezes" when trying to use autocomplete (TAB) as well as after getting an error message using gzip and ...
-1
votes
1answer
18 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
20 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
18 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
12 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
17 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
0answers
17 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.. ı notice once in a while apache throws out a Not Found error message. if i refresh again.. everything works ...
0
votes
0answers
18 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
9 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 ...
3
votes
2answers
9 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
89 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
23 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
23 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
16 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
19 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
11 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
372 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
31 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
270 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
35 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
31 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?
0
votes
0answers
23 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
247 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
17 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
38 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
37 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 ...
1
vote
0answers
31 views

Is it possible to prevent eth0 network traffic from accessing eth1 network?

I am not really sure how this is possible but I have a linux(ubuntu 14.04) box with 2 interfaces. eth0 is connected to our lan 192.168.0.* and eth1 is connected to a dlink wifi router on network ...
0
votes
1answer
16 views

find file read it and search for specific identifier

I'm trying to find out in what files some specific identifiers are being used. I know the file's name and know the identifier, therefore I use the following command to achieve my desired result: find ...
1
vote
0answers
19 views

Display boot splash on ramdisk only system

I'm working on a kiosk system with the root file system loaded into RAM. One of the requirements is that the boot process output should be completely hidden from the user. I've already managed to set ...
0
votes
0answers
9 views

facing issue while installing oracle Database 11g on rhel5 And SOA

While installing required rpms for both SOA and Oracle the below rpms are conflicting with each other glibc-devel-2.5-49.x86_64.rpm and glibc-devel-2.5-24.i386.rpm How can I fix it? one package gets ...
0
votes
1answer
24 views

How to change the ftp server port in ProFTPD

I want to change my ProFTPD server port from 21 to 1945. But I didn't find any port mention in the proftpd.conf file. When I add port 21 in the conf file and restart the ftp server it shows the ...
1
vote
2answers
46 views

How to troubleshooting failing ping to router on a linux box?

I have a home network 192.168.0.x from which I am posting this message, on this network I have a CentOS7 host 192.168.0.3 which is running a DNS server for the network. I can ssh into 192.168.0.3 I ...
-5
votes
0answers
28 views

Print lines if lines across four files does not have either Partially Successful or Successful Full [on hold]

Hi I have 4 files like below each file has one week information, I would like to print lines if lines across four files does not have either Partially Successful or Successful Full corresponding to ...
1
vote
0answers
21 views

How to enable IOMMU on the debian sid Kernel

I'm trying to enable IOMMU on my debian sid and with this kernel version : root@ziomario-Z87-HD3:/home/ziomario# uname -r 3.14-2-amd64 the motherboard of my computer is : GIGABYTE Z87-HD3 this is ...
1
vote
1answer
16 views

How does ACL calculate the effective permissions on a file?

I ran the following command to give the wheel group rwx permissions on new files and subdirectories created: [belmin@server1]$ ls -la total 24 drwxr-sr-x+ 2 guards guards 4096 Aug 27 15:30 . ...
-2
votes
0answers
41 views

Lost all files/sub-directories in a directory (ext4 filesystem in USB HDD after resume), can i find them back? and why this happened? [on hold]

I lost all files in a directory today Computer: ASUS TX300 notebook. 1 SSD on screen side, 1 HDD on keyboard/dock side. the screen is detachable from the keyboard/dock OS: Fedora 20 x64 (on SSD) ...
0
votes
2answers
32 views

What is the significance of the “wheel” group? [duplicate]

I've commonly seen references to a wheel user group online as well as when setting up my sudoers file. Does naming a group wheel imply something special about the group or is it just a name for a ...
7
votes
1answer
51 views

What does a computer actually do with its spare CPU cycles?

When a computer is not running at full load, in the context of Linux, what does it actually do? Between scheduled threads, if there is nothing to do, does it spin wait? Does it enter some sleep state? ...
0
votes
1answer
35 views

Linux Permissions [on hold]

In linux system, there are two users, user A in the same group of my directory and user B from different group. I want to allow B to access my home directory but I do not want A to access or see any ...
0
votes
0answers
9 views

Memory and CPU Monitor Usage graph [on hold]

I want to get the dynamic CPU and Memory readings of 3(B,C,D) servers remotely from Linux Server A and get the graph on the desktop,can anybody help me with the script? A,B,C,D all are linux servers ...
-1
votes
0answers
10 views

OwnCloud on XBMC Distro

I recently bought a raspbery pi with the purpose of building a cheap good multimedia station. As soon as i heard about the XBMC distribution and saw some videos of it in action i decided to try it ...
1
vote
1answer
18 views

some shared libs in /usr/local/lib aren't found but they are in /usr/lib

I can successfully run an executable using a symlink'd shared library in /usr/lib like so - sudo ln -s /lib/i386-linux-gnu/libcrypto.so.0.9.8 /usr/lib/libcrypto.so.4 In the interest of making this ...