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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Kernel panic - not syncing: No init found

I am trying to build the linux kernel image for the Beaglebone black right from scratch! i am following the tutorials referred by Free-electrons(http://free-electrons.com/training/kernel/) I am ...
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0answers
10 views

Frugal installation on WIN 7 no admin rights

Laptop from my work has WIN 7 Enterprise, but I have no admin rights on it and under no circumstances I would change partitions. However it does boot from USB. As I want to use Linux on a regular ...
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1answer
18 views

HP SmartArray RAID5 recovery on linux

This is a long time in the making, and I've finally got it working so I thought I'd share this with as many people as I can in case they're in a similar situation. Long story short - HP SmartArray ...
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1answer
24 views

SSH login attempts

The log on my server is full of entries like these: input_userauth_request: invalid user dennis [preauth] Received disconnect from xxx.xxx.xxx.xxx: 11: Bye Bye [preauth] Invalid user park from ...
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1answer
21 views

Create a write-cache loop device for a much larger block device

So, long story short. * I had a 5.5TB RAID5 array with a HP controller. * HP uses a really, really painful RAID5 algorithm (ref: Delayed Parity) * I wrote a new block driver that translates requests ...
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29 views

swapon: /swapfile: read swap header failed: Invalid argument

#sudo dd if=/dev/zero of=/swapspacefile bs=1M count=2048k 0+0 records in 0+0 records out 0 bytes (0 B) copied, 0.000417928 s, 0.0 kB/s #chmod 600 /swapspacefile mkswap: error: swap area ...
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0answers
18 views

What can cause a file reset operation to crash?

We have a dll (Delphi/Kylix) that crashes the program that has loaded it just after we do a reset on a file. This fails after thousands of operations that do the exact same thing (this was run in a ...
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28 views

Hot-changing font-size, number of rows / columns on a text terminal

This question comes from this other. I have no X-Windows installed in my system. I just simply would like to change rows/columns in a text console (terminal) without rebooting. The desired behavior ...
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8 views

3.10.17 Kernel i2c buses missing on embeded system

On my ARM embeded system I have 4 i2c buses and only one shows up in /dev and in /sys/device/... folders. Other 3 i2c buses are not loaded. There is also no warning message inside dmesg, but there is ...
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7 views

I want to utilize PCA9685 chip to drive servos on beaglebone black, I see there is a linux driver, but how to utilize in C/C++. Any examples? [migrated]

So I have a Beaglebone black, and a servo/led controller http://www.adafruit.com/product/815. I'd like to control it from a C/C++ program running on the included Debian Linux. I see there is a ...
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0answers
19 views

numlockLed is enabled but numpads are not working

I have put the following code to enable Numlock at boot time. #!/bin/bash for t in /dev/tty[0-9]*; do setleds -D +num <$t; done in start up script. it is working fine on OS level. but after ...
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0answers
19 views

Tuning NFS: Identifying source of getattr requests

we run some Linux NFS clients against a NetApp NFS storage system. Currently we have over 50% getattr requests running against the NetApp using up precious CPU cycles. Using the netapp-top.pl script ...
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0answers
12 views

How Can I be Assured That my Issue Can be Helped Here?? [migrated]

As a relatively new StackExchange User and Contributer, I see a lot of the same questions in some form or fashion day after day. I don't mind helping each visitor, but before I do, I always have a ...
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3answers
41 views

Remote Desktop like screen/tmux (from windows)

Is there a way to remote desktop into a Linux desktop from Windows and have it just like Windows? So if i remote desktop to a Linux desktop from a Windows machine I want to the see that Linux desktop ...
1
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0answers
78 views

Xorg consuming 1.1GB, is it a leak?

I am facing a problem wherein Xorg starts to consume more and more memory and finally eats up the whole swap space. As shown below, Xorg's virtual memory is about 1.1GB. My system runs only one GTK ...
1
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1answer
16 views

Always Forward Traffic Out The Interface It Originated On

(This is the original question but my eventual solution was too different from how I originally asked the question so I'm posting as a new question.) Background: I have a VM with three different ...
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1answer
38 views

Syntactic differences in cp -r and how to overcome them

Let's say we are in a blank directory. Then, the following commands: mkdir dir1 cp -r dir1 dir2 Yield two (blank) directories, dir1 and dir2, where dir2 has been created as a copy of dir1. ...
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1answer
24 views

BUG: scheduling while atomic

I have just installed Linux (OpenSUSE), and when start the OS, I get an error BUG: scheduling while atomic: systemd_udevd plymounthd... what does it mean?
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2answers
58 views

Download n Upload files via telnet session

I have an attendance Device with Linux OS installed. I am able to connect that device via telnet session. There are some files in the device which I need to download and upload with new files. How can ...
1
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1answer
22 views

Iptable forward interfaces for gateway machine

I have two Ethernet interface being configured to use as system gateway ex: eth1: 10.10.1.0 eth2: 10.10.2.0 I want to forward all the packets which are coming to the 10.10.2.0 gateway contacting ...
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2answers
34 views

access of linux and windows to same share location

I have some scenario in which I have to use windows (because of the applications), but some of the operations it is much easier to perform on Linux. Therefore, I'd like to install some machine which ...
0
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1answer
20 views

/etc/sudoers file help in giving access to all command in UNIX

/etc/sudoers file help in giving access to all command in UNIX. I read it has rules specified like #root ALL=(ALL|ALL):ALL that specifies root accesses. My question is when we execute a command ...
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1answer
26 views

Find out with a command if we can listen on a port

It is possible with a simple Unix command to find out if we can listen on a port or not? I'm building an application in which the user has the permissions to change the port. I have to check though ...
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0answers
34 views

Detect whether a swap partition is in use by a hibernated system

Is there a way to detect whether a swap partition contains the memory of a hibernated system? More specifically: suppose I have a Linux installation and that I hibernate it. This means that all the ...
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1answer
68 views

How to execute Windows commands remotely from Linux machine using rdesktop command?

Is it possible to run Windows commands using rdesktop tool in Linux? I tried with rdesktop -s option: rdesktop -u user -p 10.0.0.2 -s "cmd.exe" but I'm not able to open the cmd.exe using the above ...
2
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1answer
21 views

Do root's supplementary groups behave differently than regular account ones for NFS shares?

OS: Linux CentOS 7, NFSv4 On one machine I exported an NFS share group-owned by the nfsgroup with 2770 privileges for group collaboration: groupadd -g 5000 nfsgroup chown nobody:nfsgroup ...
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0answers
25 views

Serial Terminal (Minicom) session does not start

The serial port ttyS0 is enabled. # setserial -a /dev/ttyS0 /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4 Baud_base: 115200, close_delay: 50, divisor: 0 closing_wait: 3000 Flags: ...
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0answers
27 views

How do I install tools, packages on Linux 3.0.8 armv7l?

Environment FriendlyArm Mini210s Linux 3.0.8 armv7l On the board: # uname -a Linux 3.0.8-FriendlyARM #76 PREEMPT Thu Aug 21 16:53:31 CEST 2014 armv7l unknown I need to install development ...
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0answers
36 views

grub2 error with multiboot header [closed]

So, i try to run simple example "hello world" in grub2. After i choosed my mini_os in grub2 menu saw error with multiboot header. Here is my linker.ld ENTRY (loader) LMA = 0x00100000; ...
0
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1answer
19 views

term definitions not found

I am trying to select best term for UNIX terminal , checked the term information post , but when I try to get information about ls /lib/term* its not defined. However I did find ls ...
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1answer
32 views

Which system call is used for modifying file attributes on Linux? [closed]

I asked this on Stack Overflow and they told me ask this question here. I've searched the net for pages mentioning file attributes and system calls, but none of them ever say which system call is ...
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0answers
23 views

Ping Printer then Execute Command

I have many printers on my network using CUPS and a few pause occasionally. I can't find any consistency between them to isolate the cause so in the meantime I've made a script to view all paused ...
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2answers
399 views

What does LTR kernel mean?

I was reading some sites and came across (LTR) by the number of kernel. Can somebody explain what is means?
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0answers
18 views

Should I create aliases for local user accounts in Postfix?

Should I create aliases for local user accounts in Postfix, if I use virtual users and virtual domains? If I want receive all emails addressed to root, it is possible to forward them to ...
0
votes
1answer
36 views

how etc/hosts file is created during Centos 4.9 installation

We have our servers running CentOS 4.9. I want to find how /etc/hosts file is created during installation. A related question here (What creates /etc/hosts (RHEL 5.5)) says that in RHEL 5 /etc/hosts ...
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1answer
34 views

Why kernel threads are treated as processes

In output of the ps command like the one below (kthreadd,ksoftirqd,kworker) , i can see that there are some processes that don't have an executable file and i find out that's because they are kernel ...
0
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1answer
58 views

Creating a list containing filenames with paths

I have a directory(INPUTDIR) with sample names as subdirectories(508_C,540_C,570_D etc).Within those each subdirectories there is another directory called FASTQ which contains two kinds of files. ...
2
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0answers
39 views

Default iterface/routes metric in Linux

When I run ip route on my Linux machine, I see default via xxx.xxx.xxx.xxx dev eno1 metric 202 I wonder, where this 202 metric is configured and what other ip commands use it.
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1answer
42 views

How to find files which have been modified in the last 50 days? [duplicate]

How can I find all the files which have been modified 50 days before? I'm trying this: find -maxdepth 1 -mtime -50 is it the right command to find files that have been modified in the last 50 ...
2
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0answers
41 views

Weird mount behaviour

I have a weird thing happening and I can't explain. first take a look at the attached picture. As you can see I have a CentOS based AMS-ASPERA01 server in the DMZ, and I have 6 machines in our ...
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3answers
77 views

What does “>” do vs “>>”? [duplicate]

I am currently doing preparation for my GCSE computing controlled assessment on Linux. I type ls > list and ls >> list into the command line, but it does not do anything. I have googled it ...
4
votes
1answer
149 views

How to find out which file is affected by a bad sector?

Consider you've been informed about a bad sector like this: [48792.329933] Add. Sense: Unrecovered read error - auto reallocate failed [48792.329936] sd 0:0:0:0: [sda] CDB: [48792.329938] Read(10): ...
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0answers
5 views

mood 400 tilgin linux installation

i do have a set top box tilgin mood 400. that settop box has an IDE hard disk I do need to install linux in that box. is there anyone who has any ideas how to?
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0answers
20 views

Install Xmind on Centos 7

i try to install Xmind on Centos 7, i try with: Download Xmind with deb package ar -x xmind-linux-3.31. . .-i368.deb tar xvf data.tar.gz cp -r usr/local/xmind/ /usr/local/ cp ...
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1answer
35 views

Kali linux network connection icon missing

I was trying to setup a vpn connection in Kali linux but i don't know what did i do that network connection icon (screen top right) is missing and i can't connect to internet! How do i fix it?
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1answer
18 views

Linux - symlink between mtd partition and user data from mount location

Is it possible to create a symbolic link between NAND/NOR mtd partition and a file from mounted partition (e.g., ln -s /tmp/mnt/linux.bin /dev/mtdblock1)
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1answer
22 views

Hosting on Apache/2.2.22, scan says outdated

I am web hosting websites on Apache/2.2.22 and did a security scan. The scan said the server software is outdated, the web hosting provider says its not outdated and a stable. Someone uploaded ...
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1answer
33 views

Application specific DNS problem?

I'm working on a live stream transcoder application using nginx + ffmpeg. Everything works fine when I use avconv to transcode, but if I use ffmpeg, I get this error: [tcp @ 0xb4e9da0] Failed to ...
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0answers
19 views

iptables IP address (source and destination IP address) mangling

I tried to understand the concept of iptables mangling part, but somehow failed to understand the IP header manipulative section. For example: Below is the system scenario which I'm trying to ...
1
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1answer
24 views

how to know on my linux machine if connection VIA sftp is active

I have Linux machine red-hat 5.X please advice - which what command I can identify if someone is tiring to copy files from my machine VIA sftp or ftp is it possible to verify this on my Linux machine ...