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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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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12 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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10 views

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
10 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
11 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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1answer
26 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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1answer
22 views

Debian Stable. Iceweasel -> Use Beta or Aurora?

Xubuntu LTS user considering using Debian Stable 64 bit in next install. Only Desktop. No Network to other devices. Casual browsing and desktop use. I want to go with Iceweasel as it is packaged with ...
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7 views

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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6 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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18 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
40 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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18 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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13 views

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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9 views

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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20 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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10 views

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
20 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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1answer
26 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
19 views

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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28 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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17 views

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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11 views

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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23 views

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
15 views

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
56 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
34 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 ...
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Error while updating date time automatically on Ubuntu

I'm trying to update Ubuntu's date and time automatically, but I get an error for all time servers: asia.pool.ntp.org north-america.pool.ntp.org europe.pool.ntp.org Public Time Server (pool.ntp.org) ...
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How to add booting parameters to the kernel with bcfg from the EFI shell?

efibootmgr is creating invalid entries in the EFI boot menu. For instance efibootmgr -c -d /dev/sdX -p Y -l /EFI/refind/refind_x64.efi -L "rEFInd Boot Manager" adds an unbootable japanese characters ...
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11 views

Raspberry Pi 2 Raspbian: OBEX FTP to phone over bluetooth

I am trying to send a file over Bluetooth through OBEX. I have installed the obexftp package. I am able to pair the phone using pair in bluetoothctl. When I try to transfer a file with this : sudo ...
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1answer
19 views

Troubleshooting slow boot due to network devices

I'm trying to troubleshoot boot times for a relatively modern machine with a SSD. The machine runs Ubuntu Server 14.04.3 LTS and it has two ethernet ports. Network Manager is not installed. When only ...
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12 views

Motion daemon causes 100% cpu when stopped

I have setup the motion video detection system on Ubuntu 14.04 and want to start and stop it via cron so that it's not capturing pictures when the room is normally in use. It all works fine until I ...
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1answer
26 views

rp_filter not working, still get martian errors and dropped traffic

I am using the below commands to setup test environment for traffic flow. I am using a bash shell for traffic source but would eventually be VM or container. I don't understand where the traffic is ...
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13 views

I think I broke my PC Grub Rescue

I accidentally removed the Ubuntu partition I had on my PC and when I restarted I was prompted with Grub rescue I've tried to find the partition and to set root and prefix but each time I do ls ...
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1answer
17 views

Why does du report different sizes for the same directory?

$ pwd / $ du -hs * 0 bin 8.2M boot 82M dev 23M etc 0 lib 0 lib64 16K lost+found 4.0K media 0 misc 4.0K mnt 0 net 106M opt 44K root 414M ...
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13 views

dadcomputer.home appears as dadcomputer.lan-when logging in to another computer

I changed ADSL router recently (from BT home hub 4 to technicolour tg582n) and now dadcomputer.home (ubuntu) appears as dadcomputer.lan when logging into my freeciv server, or SSHing into another ...
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7 views

How to configure live DVD based OS to install packages to hard drive?

If I'm running a live DVD operating system (specifically Debian) is there any way that I can configure the OS to install packages to the hard drive that is in the computer rather than storage that is ...
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25 views

How to disable some cores on Intel machine

I have a machine with two Intel(R) Xeon(R) CPU E5-2618L v3 processor, which has 8 cores on each socket. I only want the OS or hypervisor (such as Xen) on the machine to detect only one socket and ...
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8 views

ffmpeg on Intel Edison cannot find pkg-config

I've had a surprisingly difficult time finding documentation for what I'm seeing. I'm cross-compiling ffmpeg for the Intel Edison using the poky linux sdk. I've set up an upper level makefile to do ...
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15 views

Memory heirarchies and kernel boot options

I'm booting a Ubuntu 14.04.3 LTS server on a Core-i5 T5200U machine with kernel boot options agp=off ipv6.disable=1 intremap=no_x2apic_optout biosdevname=0 audit=0. When I inspect dmesg, I see the ...
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9 views

script to mount a dm-crypt partition with luks

I'm going to use dm-crypt and luks on raspbian, a linux distribution for the raspberry pi. I was wandering if you have any suggestion to automate the mount - umount of the partition, or if you suggest ...
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28 views

how to clone from one USB disk to another with Linux command line commands?

I have a Bigger 1T USB disk with Fedora 20 and some user data in total about 40GB on one partition which is about 900GB.I want to move this Fedora installation to a smaller 500GB USB disk. Yesterday ...
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8 views

Stop bash script with any key

I'm writing a script which I want to stop with any key I choose. After pressing the key, my intention is to complete all my commands at that moment and start su. I've tried adding a & to my ...
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21 views

Setting up old school BBS

I've tried to find out what it takes to make a simple BBS website, just for laughs and giggles. I work with web technologies for a living, but I have no idea how to get started on this project. I ...
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23 views

Is there a way to completely disable TCP keepalive?

I'm trying to disable TCP Keepalive in a linux machine. If I set the three keepalive parameters to 0, the machine refuses connections. sysctl net.ipv4.tcp_keepalive_time=0 sysctl ...
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10 views

Slow Qt resize on Gnome 3

I am experiencing slow resize behaviour for Qt applications on Gome 3(.18) on Fedora 23. The problem is that the bounding window resizes faster than the contents and random flicker or whatever its ...
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30 views

Keyboard/mouse layout changed and weird commands in logs. Was I hacked? (OSX)

Edit: Looks like my colleagues had some fun. False alarm. My work computer is running OSX Yosemite 10.10.1. I noticed my keyboard layout was changed to Dvorak and my mouse direction reversed when ...