A family of Unix-like operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

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Cannot connect to local SSH server - bad file number

I have an Odroid XU4 with Ubuntu 14.04 server on it. I installed the ssh server with apt-get install openssh-server. I got the local IP with hostname -I, which is 192.168.0.186, I generated a random ...
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Unable to add spaces

How can i add spaces between my outputs using sed/echo or any other command in linux? Preferred Output: Virtual Machine Test01 status Running. Virtual Disk Test01 size 61GB Physical Disk ...
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How to make and restore a runtime application snapshot?

I'm trying to make a snapshot of a running application, in runtime, and restore it afterwards. By 'snapshot' I mean complete state of my application - I suppose that's just memory pages and CPU ...
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Best location of config files for Linux hosted web application?

As I'm a programmer and not an admin I hope you can help me out: Currently I'm writing a web application that uses (XML) config files that the user will be able to also edit them through the ...
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eps files very high memory usage

I have been struggling with this problem from some time. Whenever I load an eps file into latex or even for simple viewing purpose, it consumes lots of RAM. Eg. a typical 300 kb eps file consumes ...
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Linux - keep USB HDD alive programatically (no spin down)

I have faulty HDD attached to 24/7 server, which sometimes throws I/O error after spin up. Thus I want to prevent it from spinning down programatically. It's about 6 years old Samsung G3 Station. No ...
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ioctl error during btrfs send

I am getting this error when I try to back up my @home btrfs subvolume from my laptop running Arch Linux to my external drive. This seems like a straightforward error, but the strange thing is that I ...
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why USB drive cannot boot from Fedora machine but can from Windows machine?

I have WD Mypassport 500GB USB removable disk. I installed Fedora 20 on it. it works fine when I boot it with my Windows machine but I cannot boot it with my Fedora machine. If I attached it to my ...
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How to unset a “>” echo in Linux

I've just realized I don't know how to unset an echo I set with >. The exact current situation is I just set dmesg > /var/log/syslog and now wanted to unset it, realizing I've never done that ...
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9 views

Can't dual-boot Windows 7/Linux Mint (UEFI)

Reposted from Stack Overflow, because apparently that's the wrong place for this. This post is going to be kind of long because I've done a lot of testing. Until proven otherwise, I'm going to assume ...
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5 views

Refit old CISCO 5505 ASA hardware with Linux/FreeBSD software - (for the experience)

I was given an old Cisco 5505 ASA (EOL). The device hardware meets the specs for what could work in a small network, and I would like to replace the Cisco IOS with a unix open source option, like ...
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2 views

Can't dual-boot Windows 7/Linux Mint (UEFI)

This post is going to be kind of long because I've done a lot of testing. Until proven otherwise, I'm going to assume this incredibly bizarre issue is caused by my computer being haunted. I'm also ...
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16 views

Partiton Requirement for Linux

I am new to Linux, I want to install it on my laptop which currently has 2 partitions C: which has windows 10 and F: which has 700 GB capacity. I want to install kali Linux, I want to know how many ...
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11 views

How to write a new Linux kernel driver? [on hold]

I found this tutorial: http://www.x.org/wiki/Development/Documentation/XorgInputHOWTO/ It says: Note that if you think about writing a new input driver for a “common” device (e.g. touchscreen, ...
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Linux stuck on boot up, windows bootloader overwritten

Ahoi. I recently installed debian on my windows 10 machine, and have essentially bumloved my entire machine, it seems. I installed Debian using the 8.3.0 DVD Image from the official site, and the ...
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8 views

Play stream with VLC on Ubuntu 14.04

I have Ubuntu desktop 14.04 with two NIC, eth0 and eth1. One is just for internet and the other one is on local subnet where multicast UDP stream is coming. Default route is on eth0, and multicast ...
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15 views

Can't access files in SMB share

I'm trying to mount some share from my synology NAS via SMB. I'm using Linux Mint and when I mount it over the GUI ("Computer"->"Network"->"NAS"->"Sharename") everything works fine. But I want it to ...
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Transmission-daemon and security

Recently I have installed and configured transmission daemon on my server, but I wounder how I can increase security of it. I am using nginx to provide access via ssl but I have a question about ...
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7 views

External hard drive is not seen in computer but it can be seen in devices computer management [duplicate]

I have 1TB WD My Passport portable hard disk. I was using it with both Windows 7 and Linux. However something is wrong with it. Both OS do not recognize it and I can see my external disk is ...
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12 views

KDE - “/media/dev/path is a folder, but a file was expected” error

I have a Kubuntu 15.10 installation (fully updated). Sometimes when I try to copy some files/folder the OS throws "/media/dev/path is a folder, but a file was expected" error. Screengrabs (Click on ...
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17 views

How to see Kernel Oops/Panic? and provide “proof”

I'm doing this assignment and I'm kind of confused on providing proof for kernel oops/panic static int __init hello_init(void) { printk(KERN_INFO "Hello world!\n"); return 1/0; ...
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Linux: Why UID and GID are 0 despite not being the root user?

Just a question here. I was looking through my program and its pid, uid, gid. And I found UID and GID are 0 but I'm not signed in as a root user. Why is this the case? And I am curious if UID and ...
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1answer
19 views

Apache, DocumentRoot effect

A question regarding the DocumentRoot directive as found in Apache's sites-available folder, file 000-default.conf has: DocumentRoot /var/www/html My layout of the /var/www folder is: ...
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1answer
17 views

BIOS can not find hard disk in boot priorities

I was installing Linux Kali os 2.0 but have got an error while installing grub, so I was unable to start installed kali os and also second OS, Windows 8.1. Only what was possible was to start live ...
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36 views

New SSD terribly slow at writing in Linux

I got a new SSD, Crucial BX200, 480 GB. It is plugged into a sata 3 port. I installed Linux Mint 17.3 Cinnamon 64 Bit on the ssd (using full disk encryption) If I run bonnie++ to do a benchmark, I ...
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What is the difference between the Iceweasel versions?

I am a Xubuntu LTS user, considering using Debian Stable 64 bit in my next install. I use just one desktop computer, with no network to other devices, for casual browsing and desktop use. When I ...
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Auto-unmount NTFS partition when hibernating Xubuntu

I use a dual-boot setup (Xubuntu & Windows). My Windows has Fastboot and Hibernation disabled and my main OS is Xubuntu which i hibernate almost every day. I always make sure no NTFS partition is ...
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8 views

adduser with custom conf file: enable all users in group to read, write and execute

I am trying to enable apache to create new users for git groups, repositories and ssh access. I've managed to get apache to add users, but now apache cannot move, read and write in the home dirs of ...
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1answer
29 views

Kernel threads and process virtual address

If the kernel is spawned as threads and resides in the memory then how could the ps command identify them if those are not normal process and i give you more look here: root 2 0 0 ...
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1answer
44 views

What is the maximum capacity of a small router?

I developed a Java app, that runs on several Raspberry Pis. This software makes 10 requests to a server at same time during the day. When the first Raspberry was started there wasn't any problem. But ...
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22 views

64GB SSD, 20GB visible, HPA disabled

I have a 64GB OCZ Agility 4 SSD that only shows 20GB available. My first thought was HPA was enabled, so I fired up hdparm only to learn that HPA is disabled. root@PartedMagic:~# hdparm -N /dev/sdb ...
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KDE - Plasma becomes glitchy with Intellij Idea launched

I am using Debian Jessie with KDE. When I am working with opened IntelliJ IDEA, almost all windows in Plasma become so: How to fix it? Version of IntelliJ Ultimate is 15.0.3.
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Conflict between encoding charsets when generating irc stats from ZNC logs with PISG

I'm using PISG to generate stats for an IRC channel. Log files are from ZNC log module. Logs are in this folder: ~/.znc/moddata/log/ The problem is that when i'm generating stats with PISG, my ...
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Error installing Rcpp package on RHEL (using R 3.2): Unable to load shared object

Have R 3.2 on RHEL 6, and trying to install Rcpp package from source, i.e.: install.packages("Rcpp",contriburl="file:///home/msadm/R_packages") User doing the install does not have root/admin access, ...
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23 views

VLC video playback is trimmed and blacked out

I am using Kubuntu 15.10 and recently I have updated the version to the latest backport version. But soon after the update VLC has started making weird output. VLC is cropping out the video and the ...
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Vagrant interface issues

Using a very simple Vagrantfile # -*- mode: ruby -*- # vi: set ft=ruby : # See README.md for details VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| ...
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1answer
21 views

Basic setup guidance needed

I set a CentOS to run our company website using Apache. Apache runs as user apache. Now, to update our website code using git, I set a user say sumit, and create a shell script that does git pull (I ...
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30 views

Open a movie with VLC from command line via SSH

I have a linux machine connected to the tv and being the lazy person I am, I would like to sit on my laptop, SSH into the linux machine and play a movie in full screen. I've tried running the command: ...
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1answer
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RTL8188 AP and Client mode simultaneously with hostapd in Linux?

I'm trying to figure out how to set up my RTL8188 Wifi dongle to run in both AP and Client mode at the same time. How can I do this in Linux? I have hostapd running fine and I remember reading about ...
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37 views

how to fix deb command not found in kali linux 2016?

i follow tutorial install wine on wine offical website: https://wiki.winehq.org/Debian. but have a trouble, in this picture Please tell me how to fix for completely wine install and run window ...
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24 views

Cheapest smallest linux computer that is network capable via ethernet phy [on hold]

I am looking for the cheapest processor soc or system on a module with at least 80 Mhz that runs linux and has at least 256Kbyte SRAM. At the moment i found the following chip: ...
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802.11N in TP-LINK TL-WN722N

I'm using usb dongle TL-WN722N as Acess Point on my Raspberry Pi B 2. It works as AP but I can't get 802.11N speeds to work. My max Bit Rates is 65 Mb/s. Is this correct? sudo iw list: Wiphy phy0 ...
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Alt-tab within VNC and back to my desktop

My local desktop is Windows 7, and my remote Linux machine is Ubuntu + Gnome. I access my linux machine via VNCViewer. When I'm working on my desktop, Alt+Tab switches between my desktop programs. ...
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1answer
12 views

How to change location of Calibre database?

My files were on mounded FS /media. I have changed the location to /NAS/media and no Calibre does not see the database. After this message nothing happens. How to say a new location to it?
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Can Linux cache domain user credentials?

I want to centrally manage users on my small network at home, preferably in a mixed Windows/Linux environment. (I'm transitioning to Linux to avoid Windows 10.) Is it possible to cache users on a ...
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1answer
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Copy files mentioned in List one by one only after completion

I have a list of file names in a text file files.txt which are listed one by one in next line ie. file1.txt file2.txt file3.txt file4.txt ... ... ... I have to execute the following command for ...
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14 views

Backup with client-side encryption that supports file renaming/moving [on hold]

I've been using Crashplan for remote backups for a while now, but I'm frustrated by the amount of memory it uses and I also particularly have trouble with the fact that it doesn't have any support for ...
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7 views

Command to fetch a list of urls with connection keep-alive but fail on the first error (404/500)

I am trying to reproduce a potential bug in the Jetty web server with regard to serving static files. I need to repeatedly download a list of urls with "Connection: keep-alive" until one of them ...
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2answers
57 views

How to find the user who deleted the file?

Some user on my server just deleted a file, I want to find out who did it. Going through everyone's history is not feasible and command cannot be as simple as rm -rf file. Is it possible to know who ...
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2answers
40 views

Problems with multiple static network interfaces on Linux

I have created 2 static interfaces, eth0 and eth1. Here's how my /etc/network/interfaces file look like. # This file describes the network interfaces available on your system # and how to activate ...