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

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NullPointerException using the VisualVM launcher

I'm running Arch. I installed eclipse-java from the AUR and later installed visualvm from there too. After setting up the visualvm launcher, and creating a run configuration using it, I still get a ...
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Old Laptop wont boot linux live USB

I am trying to back up information from an old laptop which will not boot windows. Naturally I have tried using a bootable Linux USB. The problem I was having is that the laptop would not load the USB ...
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Why does BTRFS seem to have comically large amounts of metadata?

I've recently discovered the marvel of a modern filesystem, btrfs. After playing with it for a few hours, I decided to dive straight in and converted my entire /home partition using the btrfs-convert ...
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Linux: routing table - Gateway column: 0.0.0.0 vs *?

I have found SO question about What does 0.0.0.0 gateway mean in routing table? but this is not exactly what I want to know. I have noticed that in some outputs (e.g. here) of Linux route -n command ...
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Script that search for a string in the ouptput of a command

This may sound a bit complicated but I do not see any other way. I want to create a script that will check after running the command 'cli ha' to search if a certain line contains a string = 'Active' ...
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Stop automatic comments in my crontab

I have added the bellow cron jobs in my crontab : 0 5 * * * /bin/systemctl restart gb_subagent.service 28 13 * * * /home/comment.sh &>/tmp/errorcron.log 29 13 * * * bash ...
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How do i remotely connect to linux box bu tunneling via windows machine

i have a windows machines which serves as jumpb box where it has access to other network behind the firewall and i can do RDP from my laptop(windows) to this windwos machine (JB) Now i need to ...
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1answer
6 views

How to keep the reverse shell open in Netcat?

As soon as the command prompt is closed on the target machine the reverse shell is closed on the client machine. Is there any way to keep the port open and Netcat working after the target machine ...
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Which smartphones supports most operating systems? [on hold]

The title says everything, I would like to know, which smartphone supports the most current operating systems? I am thinking about the following systems: Sailfish OS Android Custom Roms Tizen Ubuntu ...
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6 views

How to move specific icons from message tray to top panel in Gnome 3.14?

I'm using Fedora 21 with GNOME shell 3.14. I found an extension called TopIcons which works well but it moves all icons, whereas I need only specific ones. I found an instruction but it seems to be ...
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Live TV streaming with Tvheadend works fine on laptop, but not on home server

I have a DVB-T TV tuner USB dongle (Afatech AF9013/AF9015) which I'm using in conjunction with the latest version of Tvheadened and the latest stable build of Kodi. I ultimately want my small home ...
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Plesk 12 PHP Cache options

On my Plesk 12 vServer I've installed multiple PHP versions: PHP 5.3 PHP 5.4 PHP 5.5 PHP 5.6 I'd like to enable a cache method (APC, Redis, XCache or Memcache) for all of those PHP installations. ...
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Setup default PHP version in Plesk 12

I've just setup a Plesk 12 CentOS6 vServer. I installed some PHP-versions like 5.4, 5.5 and 5.6. The customers can change the running PHP version in the interface. All is working fine, but I have one ...
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How to boot the GRUB rescue prompt as i am unable to format the laptop

I installed Ubuntu in my laptop. After some days i was trying to format my laptop through the recovery mode given by laptop manufacturer. I went into the recovery partition by navigating through the ...
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7 views

Sugar on a Stick Installation on white Macbook 2009: Don't

This is more a psa than a question. If you know better where to post, please let me know. I have been trying to install sugar (not) on a stick on the main drive of my daughters white macbook, 2009. ...
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12 views

Set up Firefox sync programmatically

I want to set up Firefox sync from the command line. I wrote a Arch Linux install script I want to be able to set up Firefox sync as well. I am thinking I can change the profile somehow, but I am not ...
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9 views

Use IPTables FORWARD for NFS

I have this topology [R1] -> [F1] -> [Server] I need to pass ssh, web and nfs traffic through F1 to Server using iptables. It's quite easy with ssh and web but I'm stuck with nfs. I have set static ...
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1answer
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Kali Linux KDE login issue

I have installed a Login theme(Caledonian) in Kde. But after rebooting there is no text field to enter username. Only a Password field, but when I enter password, it says Invalid. I tried Console ...
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Force a Linux kernel module to be compiled as a module instead of built-in

I have the sources of the kernel of an embedded Linux box (specifically a QNAP NAS) which is running a 64-bit v3.12.6 Linux kernel, together with the kernel config files. What I'm trying to do is ...
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Trouble with connection to irc.freenode.net via Tor

I have a trouble with connection to irc.freenode.net. I have set up Konversation IRC client according to guidelines: https://freenode.net/sasl/ https://freenode.net/irc_servers.shtml#tor Server: ...
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1answer
13 views

Using second keyboard for for special characters

I currently having an unused keyboard (a HP's KBRF1921 to be exact). I always need to type some Greek characters such as αβɣ and latin character as abc. It'd be great if I could use one for latin ...
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Can't shrink or move linux partition “leftward” in gparted

I have a partition that is completely full, and there is no unallocated space on either side of it to "expand into". So want to shrink one adjacent partition, maybe "scoot" the data over on the ...
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Increase size of a vdi fixed disk, used for a virtualized ubuntu server

I have a fixed vdi disk in an ubuntu server (it's a virtual machine, i'm using virtualbox for handle this from my ubuntu desktop so). I installed a lot of things, and the disk is full (i wasn't pretty ...
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1answer
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Confusion about the `conntrack` extension of `iptables`

The iptables-extensions manpage has this to say about the conntrack extension (emphasis mine): This module, when combined with connection tracking, allows access to the connection tracking state ...
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Disk encryption password prompt doesn't appear - Linux Mint 17.1

I've installed Linux Mint 17.1 on my desktop computer with full disk encryption set up. Upon starting my computer and after the splash screen, a black screen appears, and does not move on. If I type ...
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1answer
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How do I know if certain iptables extensions are available and enabled?

I was reading this: https://help.ubuntu.com/community/IptablesHowTo#Allowing_Established_Sessions It says "If the line above doesn't work, you may be on a castrated VPS whose provider has not made ...
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1answer
26 views

Is there any way to automatically decrease subwoofer volume at night?

I'm using both Windows and Ubuntu, so a solution for either (or both!) would be great! I live in an apartment complex, and love to listen to bassy music and watch movies. My neighbors are fine with ...
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2answers
13 views

Mac OS .bash_profile errors

I'm running Mavericks 10.9.5 and I have tried to install Metasploit from this guide. It was until the Install Homebew I used echo PATH=/usr/local/bin:/usr/local/sbin:$PATH >> ~/.bash_profile ...
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3answers
25 views

Listing folders without certain file

I have a 150 subfolders. Apparently 4 of them do not have files that should be in them, named PKA.dump How can I run a command in linux to find which folders are missing the file PKA.dump?
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Create M3U playlists for iBasso DX50 on Linux

I'm using an iBasso DX50 as my music player and I use Linux as my primary OS. I need to create M3U playlists to be imported into my iBasso DX50. I would try and edit some of the files myself but I ...
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error: no such device … entering rescue mode … grub rescue

EDIT After trying out these instructions still not working: http://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows The error during grub ...
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1answer
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Make traffic go one-way by using iptables

I have a network topology: [C1] - [R1] - [R2] - [C2] C1-R1 network is 192.168.100.0/24 R1-R2 network is 10.9.8.0/30 R2-C2 network is 192.168.200.0/24 What I need to do is to make C2 be able to ...
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1answer
31 views

Why are the file formats different?

When you go to a certain site to download an application. why can't you run the same file formats for different operating systems?
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Laptop shuts down by closing the lid when plugged, not goes to sleep as it should

I have installed Debian 8.0 Jessie with Gnome on my HP ProBook 430 G2. The weird problem is that when I close the lid while laptop is plugged, it shuts down and does not go to sleep as it does when ...
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Linux's write command issue

I'm trying to send a message to myself through write command because I want some scripts running in the background and being able to echo things to the terminal where I am. So, I get always the same ...
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1answer
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Forwarding requests to my external IP to a different IP

When I connect to my external IP in linux, it gets forwarded to my gateway (router). But I need to run a server, so I need to be able to forward requests to my external IP to my computers ip address. ...
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23 views

Copying an SSH ID to a server from a certain computer yields an error while the same command works fine from other computers

I get the following error message when trying to copy an SSH key to a remote server: ssh-copy-id -p*** ****@****.com Pseudo-terminal will not be allocated because stdin is not a terminal. ssh: ...
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How to run Cornelsen's “Tobi” software (for Windows) on linux, using Wine

There are a lot of resources on how to run Windows software with Wine, but this question is specifically about how to run a software called "Tobi Fibel" from the German Cornelsen Verlag on (Ubuntu) ...
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2answers
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Samba: Need guest/everyone read-only and writeable by users in group

I can't get this to work correctly. I can login as guest fine but when I enter the username and password for a user on the server, it doesn't accept it. Not even root. smb.conf [global] ...
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3answers
56 views

Compiling Linux kernel to boot from a 1.44MB floppy disk [on hold]

I want to compile the linux kernel (for use in a floppy linux minimalistic linux distro, which I am trying to make), but how am I going to do this in order to be fitted on a 1,44 floppy disk? I have ...
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1answer
28 views

Faster recovery from a disk with bad sectors

Recently I tried to dd from an unhealthy HDD to a file. I used dd if=/dev/sdb of=somefile bs=4096 conv=noerror,sync. My problem was that dd wasted a lot of time when it encountered a bad block. In my ...
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2answers
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Which .bashrc file to edit

On my raspberry pi (running raspbian), I'd like to edit the .bashrc file so that various actions can be performed at every login. However, I have found two .bashrc file on the system: one is located ...
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1answer
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What chages and adjustments to Chrome/Chromium are most effective to lower the number of writes and prolong the life of SSDs?

Ive got a corsair Force 80 SSD, an AMD APU and 4 gigs of ram as assets as well as some thumb drives I suppose.Im running Mint Linux 17.1 64 bit in this box and mostly its used to crawl the web. Lots ...
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Bash scripting parted for GPT

Using Bash & Python scripts in Ubuntu 12.04, we are delivering a disk image to customers as a file (generated by dd). Once dd’d to the new disk, we resize the partition to fit the disk. Now that ...
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How secure is it to use a image of an prebuilt Operating System?

I've bought a Banana Pi (single-board computer) (with ARM-CPU) to learn more about Linux/(L)ubuntu. I read that closed-source or prebuilt Software is problematic in terms of privacy/security. I ...
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ChromeOS hack dont let me mount usb in filemanager app

Hello a Chrome Laptop(Samsung Series 3 ) comes to may hands, this are for internet but I wan´t use as child computer or office, because wifi internet is not very easy here. I in developer mode and ...
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1answer
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How to confirm apt-get confirmation during mysql-server installation

I am trying to write bash script that will install mysql-server-5.6 I want to ask user for password and then I will use it during installation mysql-server and some other configuration. But my script ...
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why cannot I filter traffic using TCPDUMP while sniffing on wireless interface

I've 2 wireless interfaces one has the type of AP and the other has the type monitor. the AP is attached to a bridge br-lan. When I run for example: tcpdump port 5201 -s 0 -ni wlan0 TCPdump is ...
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2answers
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Locale on Debian 7 doesn't change

So I have tried all things that I could Google up but still locale settings aren't changed (kind of, you will see what I mean). To start off desired locale (lv_LV.UTF-8) is available on the system: ...
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How do I boot from a different disk?

I have a working Debian installation. It boots from /sda using GRUB2, with the root partition on sda1. Its a standard install, nothing strange. I've added a 16GB mSATA device which appears as sdc. I ...