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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37 views

Set permissions not to change permissions [duplicate]

Consider an example File1.txt, t3dev and ttuser own this file actually but When I use my id(user1) and edit this file, the file user and group are changed to my id(user1). I want to set the ...
1
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0answers
57 views

How to properly start and stop shell script in linux, busybox?

I am trying to write a small shell script that would send some commands to my tv set from my set top box that has busybox on it. The problem is that it generates huge amount of zombie processes, and ...
2
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0answers
19 views

Linux kernel module to read out GPS device via USB [migrated]

I'm writing a Linux kernel module to read out a GPS device (a u-blox NEO-7) via USB by using the book Linux Device Drivers. I already can probe and read out data from the device successfully. But, ...
0
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2answers
69 views

how to remove all double quotes from csv except specific field

I want to remove all double quotes from my csv but not the fourth field (because the four fields represent PATH of file) Please advice how to implement this by sed or awk or perl one liner , etc ...
0
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1answer
39 views

Unable to delete a file

An update has corrupted my system, I attempt a receipt and update of php5 error that you can not write /usr/lib/php5/libexec. When I try to read this file, which I find is this: ...
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0answers
15 views

PlayOnLinux(POL) Excel 2007 can not open more than one spreadsheet

I have Installed CentOS 6.5 - i386 and PlayOnLinux 4.1. On that MS Office 2007 is installed. Word 2007 is able to open more than one document simultaneously and also possible to perform Cut, Copy and ...
0
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1answer
37 views

Solid State drive vs. traditional hard disk in a virtual server environment

I am currently considering upgrading my virtual-hosting plan because of very bad write performance (mostly writing to a MySQL database, but I notice it also when compiling a program or copying files - ...
3
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1answer
22 views

awk + gsub + how to work with all kind of characters

The following awk command target is remove spaces and unnecessary quotes from CSV file and only from single words between separators awk 'gsub(/("[ ]+|[ ...
0
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1answer
54 views

How to know free disk size witout df command? [closed]

Is it possible to check free disk size in Linux without using command lines such as df? Since my host machine is embedded Linux, there are no direct command lines that show free disk size.
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0answers
8 views

Pantheon lost keyboard configurations

I install Pantheon yesterday and now every time startx my keyboard configurations back to us, but the correctly is br+abnt2. So I need to run in terminal (after startx) the command: setxkbmap ...
2
votes
1answer
40 views

mysql fail to start bash_completion errors

So after upgrading my debian system, mysql does not start anymore with command "service mysql start". I get: Job for mysql.service failed. See 'systemctl status mysql.service' and 'journalctl -xn' ...
0
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2answers
67 views

Difference between Unix OS Types [closed]

What is the difference between Linux, AIX, Solaris, MAC. Aren't these all some kind of Unix flavors ? Why do we need so many types. Why can't there be just one type ?
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0answers
7 views

Communication between two kernel drivers [migrated]

I have custom embedded hardware i'm working on which runs linux. I've implemented a spi kernel driver to handle spi access to a eeprom which is exposed to userspace. Now i have another kernel driver ...
1
vote
1answer
43 views

Real vs Actual memory in Xymon/Hobbit

What is the difference between real and actual memory usage in xymon ?
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0answers
43 views

how can I backup and restore of partitions and logical volumes?

This is my disk scheme sda1 /boot ext4 sda2 /somefiles ext4 sda3: lvm volgroup1/lvolume1 / ...
0
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0answers
22 views

Inotify notifies only single change

I set the inotify_add_watch to watch /dev/disks. The entries in this directory are: by-id and by-uuid. When I plug-in a pen-drive, this directory gets added with two more directories: by-path and ...
3
votes
2answers
63 views

Is Android compatible with the Linux Standard Base?

Moved from Stack Overflow, where I realize it was off-topic since it was asking for sources - far as I can tell, the rules forbid that there but not here. I know that the kernel in Android is now ...
5
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2answers
107 views

Linux kernel manual build: resulting binary is 10 times larger than precompiled binaries

I'm using Linux Mint 13 MATE 32bit, I'm trying to build the kernel (primarily for experience and for fun). For now, I like to build it with the same configuration as precompiled kernel, so firstly ...
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0answers
23 views

raspberry pi pulseaudio server connection failure

I purchased a raspberry pi model b , after installing image, the first thing I do is I installed vlc and copy a mp4 video in raspberry pi. Now from command prompt I tried to run my video using vlc. ...
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0answers
12 views

In Linux count number of key presses except those in the browser

I want to count the number of key-presses in Linux, except those in the browser. There was a solution proposed here but not sure how to ignore browser key-presses.
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2answers
44 views

What are the positions in `free` called?

I am trying to compare the output of free with the output of sar -r: # sar -r 12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 12:10:01 AM 629756 65293976 ...
3
votes
0answers
48 views

Typing punctuation adds an accent to the preceding letter after my laptop is docked for a few minutes

I am running Manjaro XFCE. Everything worked like a charm for months now, but 2 weeks ago the keyboard configuration from my external keyboard seems damaged. Writing on my laptop itself works ...
0
votes
1answer
30 views

VPS SSH and my OWN IP

Is it possible to to stay in total anonymous mode for the VPS provider? I have got a VPSVZ machine with UBUNTU server. Is it possible to do anonymous tunneling: VPS1 -> VPS2 -> VPS3 (all UBUNTU) ...
3
votes
1answer
139 views

mounting a SD card without a partition

I try to mount a SDHC card under GNU/Linux. Unlike what happens usually, /var/log/syslog doesn't mention sdb1, just: Jul 26 16:07:53 xvii kernel: [ 159.404842] scsi 6:0:0:0: Direct-Access Singim ...
0
votes
1answer
663 views

Unable to connect to source.repository.backtrack-linux.org

I have a BackTrack5 r3 installed on VMware. As you see below I have internet access in it : root@bt:~# ping www.google.com PING www.google.com (173.194.70.105) 56(84) bytes of data. 64 bytes from ...
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0answers
34 views

A problem with ubuntu [closed]

I have a Dell Inspiron 1420 with Windows Vista. I wanted to install Ubuntu on it, so I burned the ISO file to a 16GB flash memory and I booted the laptop from it. I tried to install Ubuntu on the hard ...
3
votes
1answer
50 views

How to create GUIs (such as menuconfig) with lxdialog

I try to generate a menuconfig by my own with the help of lxdialog (source: lxdialog). Unfortunately this is not so well documented as I wished for. Example: So what I did: I included these files ...
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0answers
27 views

How to find out why my cron didn't run? [duplicate]

This is the content of root's crontab: 0 23 * * 0-4 /usr/sbin/rtcwake -time `date --date="+16 hours" +"%s"` -m mem This is set to fire off that command every Sun-Thu at ...
3
votes
1answer
61 views

RAID-1 mirror has become a single hard disk

I have an HP N40L microserver, with 2 identical drives, I used the system to hardware-RAID them as a mirror. I then installed mint on the system about a year ago. This has been running perfectly, ...
0
votes
0answers
8 views

Why surt1000xli APC UPS recognised by NUT apcsmart driver as “old”?

So I have this UPS connected to machine with a RS232/USB cable. ups.conf contains [apc1] driver = apcsmart port = /dev/ttyUSB0 desc = "APC USB" And I get the following output: $ sudo ...
1
vote
1answer
31 views

bash script not being run by cron [duplicate]

I have a very simple bash script that runs flawlessly when I do ./removeOldBackup.sh or sh /home/myusername/backup/removeOldBackup.sh but when I add it to crontab like * * * * * sh ...
6
votes
2answers
39 views

How to make files inside TMPFS more likely to swap

I'm using tmpfs for my /tmp directory. How can I make the computer decide to swap out the files inside the /tmp before swapping out anything that is being used by applications? Basically the files ...
3
votes
2answers
49 views

How to view files hidden by a mount on Debian 6

I have been trying for a while to view files, hidden by a mount on my device sporting Debian 6, to no avail, and being new to Linux, I am compelled to ask the question: How do you view files hidden by ...
2
votes
0answers
30 views

How to set up networking on a per-user basis?

I would like to set up access to corporate VPN for just my user account on my computer; not for the other accounts and certainly not for the guest user. To achieve this, I presume, I need to ...
1
vote
0answers
41 views

How do I run Linux on a MacBookPro(11,2) with more than one CPU?

I have a late 2013 15-inch MacBookPro (MacBookPro11,2). I need to have Linux running on it. The closest I have come is loading Xubuntu, which only boots with the maxcpus=1 kernel option. Question ...
0
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0answers
34 views

bash script loses readonly value after first time thru loop

I have a bash script which seems to lose the value of the readonly constant after the first time thru the for-in loop. For example: #!/bin/bash readonly DIR="./groups/" for output in "${array[@]}" do ...
1
vote
2answers
60 views

Unable to get rid of root user and privileges

I am told that the most basic security to set up in Linux is to change the superuser name from root to something obscure so I run these steps to add new user $ /usr/sbin/adduser new_username $ ...
3
votes
1answer
56 views

Does “mount -o remount,ro” flush filesystem buffers?

On Linux, does mount -o remount,ro flush filesystem buffers/cache, or should I also run sync to achieve that?
0
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2answers
63 views

Debian VLAN (8021q) Configuration doesn't work

I try to setup VLANs on a virtual Debian machine. It's connected to an Cisco 2960 Switch. The Switch has 3 VLANs (1,100,200) which're allowed the pass the trunk. The Switch Configurations was tested ...
0
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0answers
25 views

Roundcube Web Mail client to hide folders

Roundcube web mail client works perfectly. But the problem is that I want to hide INBOX subfolders (they are without content) globally. There are separate folders which are used and they are with ...
3
votes
1answer
95 views

Minimal Linux with kernel and BusyBox: /etc/inittab is ignored, only /init is executed

I managed to create a small and fully functional live Linux CD which contains only kernel (compiled with default options) and BusyBox (compiled with default options + static, all applets present, ...
3
votes
1answer
65 views

How does `stdin` of linux work?

I know that stdin refers to standard input in linux, usually the keyboard. It can also be referred by file descriptor 0. So, which file descriptor does the (standard input) mouse refer to? Or is it a ...
0
votes
2answers
31 views

Copy over existing files without confirmation?

I need to copy and over-write a large amount of files, I've used the following command: # cp -Rf * ../ But then whenever a file with the same name exists on the destination folder I get this ...
4
votes
1answer
44 views

ZFS: Trying to remove top-level drive from Zpool

I have a zpool called storage that contains a five device raidz1 array. Today I went and bought another 3TB device and put it in my enclosure. However, instead of creating a new pool and adding that ...
1
vote
0answers
22 views

Keyboard is disabling

I stuck with a strange problem on OpenSUSE 13.1, after some random uptime my keyboard is disabling. I'm not even sure how to concretize this problem, this happening randomly and I can't see any ...
0
votes
1answer
47 views

Can a file be corrupted by copying from NFS to CIFS?

I have Linux RedHat 6.x, and I mounted a Windows 2008 R2 NFS share. If I copy data from my Linux machine to Windows, that doesn't seem like any harm. But if I take that file that is in my exported ...
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0answers
25 views

Disable CPU scaling with U 1404

I know there are a lot of things about this topic but I couldn't find anything not older than 4 years. As the stuff develops so fast I hope it is fine to ask again a few years later. What is ...
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0answers
17 views

TPM passwordless boot

I'm trying to create device with CentOS6, encrypted disk (with LUKS), TPM module and TrustedGRUB to boot securely and without interaction. I'm following instructions from ...
0
votes
1answer
26 views

Loginuid, should be allowed to change or not (mutable or not)?

I am trying to configure the linux kernel. I was confused by Make audit loginuid immutable (AUDIT_LOGINUID_IMMUTABLE) [N/y/?]. The help says: +config AUDIT_LOGINUID_IMMUTABLE + bool "Make ...
5
votes
2answers
141 views

File handles and filenames

I read this post. Are file descriptors the same as file handle? While trying to configure the linux kernel, it asks open by fhandle syscalls (FHANDLE) [Y/n/?]. Why is this option provided? Does ...