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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How can two applications read from the same (digital) sound input in Linux/ALSA?

I have a sound card with an AES/EBU input port that I want to access with two applications simultaneously. I want to record the input to a linear WAV file in real-time while also streaming it through ...
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Realtek PCI network card not functioning on Linux

I have two Realtek Ethernet devices on my Linux (CentOS) machine. The onboard interface is detected but the other one is not. In the below lspci output first one is working. [root@compute ~]# lspci | ...
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PHP server permissisons for files and directories granted, but still not allowed

I have php code on Codeanywhere where I'm simply trying to create a file on the server but yet gets the following error : "Warning: fopen(file.txt): failed to open stream: Permission denied in ...
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To increase payload size of libmicrohttpd library

I was assigned a work to create a server daemon for background processing which performs some checks and encryption of data received over http post method. I have to receive the payload of 5MB of ...
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2answers
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Is it possible to compile a Darwin Distro from source, like you can a build a Linux Distro?

I have read through and undertaken Linux From Scratch (and BLFS) and I was wondering, can I follow this guide to create a Darwin Distro by substituting the xnu kernel? Would the process be vastly ...
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1answer
7 views

Sub-domains keeps redirecting me to Main web-site

I have just upgraded my version of LAMP Environment. Rest all the things are working fine but with Sub-domains i have a challenge. I have a Main website abc.biz and 5 to 6 sub-domains with it as ...
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2answers
19 views

I'm not able to connect with SSH because of SUID warning

When I try to connect with another machine, after this command below: user1@host1:~$ ssh user2@host2 user2@host2's password: I receive: WARNING: Your password has expired. You must change your ...
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1answer
129 views

tc packetloss cgi script via webpage throws AH01215: Illegal “loss percent”

Using the following tutorial to run CGI commands, and after fixing a small issue executing sudo /sbin/tc qdisc add dev eth0 root netem loss 1% returns an error AH01215: Illegal "loss percent" (at ...
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1answer
535 views

Why doesn't the maldet shortcut command work, but full path does?

As you can see in the screenshot, the shortcut doesn't work, but the full path does. How can I fix it? I am logged-in as a normal user then su to root, since direct root is disabled BTW.
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3answers
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Centos 7 detecting only 3 GB of RAM

Centos 7 is detecting only less than 3GB of RAM instead of 4 [root@compute ~]# free -m total used free shared buffers cached Mem: 2913 425 ...
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2answers
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Bridging Firewall to Public Wifi

My building offers wifi to its residents. It is not managed by IT professionals. I would like to use this internet source some of the time, but would like to be protected from machines on that ...
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2answers
20 views

Is there any way to install any linux distro without acesssing the bios? (broken screen)

I am trying to run a Linux system from my y500 Lenovo ideapad but I can not access the boot menu or bios at all. This is because I have a broken screen and am using an external display to make use of ...
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0answers
19 views

The best technique to copy files faster [on hold]

As usual I need to do backups everyday , rsync is the best option I have at the moment to transfer from a GRAid to a local storage ( minisas from a raid5 storage to raid0 local drive ) . Wondering if ...
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4answers
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What used the linux memory? Low cache, low buffer, not a VM

First of all, yes, I have read LinuxAteMyRAM, which doesn't explain my situation. # free -tm total used free shared buffers cached Mem: 48149 43948 ...
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3answers
45 views

How can I give permanent admin access to the Linux program such as Aptik?

I’m using Linux Mint x64 with KDE and I can run the app Aptik fine from the terminal as sudo Aptik followed by its parameters. No problem. But I want to be able to run it from its GUI. The program ...
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3answers
77 views

Correct domain name for a home desktop Linux machine

I have several machines running Debian, and during install, I left the domain name field blank. This hasn't affected anything so far, but I'm curious what the correct thing to set that field to is if ...
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2answers
11 views

SSL Root CA certificate is not recognized, although present in the trust store. Why?

Background: Ubuntu Server 14.10 64-bit on aws.amazon.com/ec2 Cheap PositiveSSL server certificate from COMODO 1 server certificate, 2 intermediate CA certificates and 1 Root CA certificate as ZIP ...
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1answer
14 views

Arch Linux insane memory usage

I just installed Arch Linux and set it pretty much up how I want it to be. At the moment XFCE4 with LighDM, Firefox and a few other little applications are running. I wanted to see whats going on in ...
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KDE's file manager Dolphin displays error mesage on Fedora 21

Every time I try to use Dolphin, nothing appears where files should be listed. Instead, there is an error message right below the toolbar that states: Could not start process Cannot talk to ...
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8 views

Create key combination to run script action

I am having shoulder problems and the mouse movement is hurting my arm, so I am trying to create a simple way of navigating the mouse with vim-like movements. I found xdotool and can, for example, ...
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0answers
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Debian can't connect to Wi-Fi network after upgrade from Wheezy to Jessie

After upgrading my Thinkpad T420 from Wheezy to Jessie today, the integrated Wi-Fi stopped working. After countless hours of searching, I still can't seem to find what the issue is. In the GNOME ...
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3answers
29 views

Why does Linux accept traffic on unconfigured loopback addresses?

On at least two version of Linux (Ubuntu 9 and Debian 7) I've noticed that, even though I only have a single loopback address configured on lo (the standard 127.0.0.1 one), it happily accepts packets ...
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LXC: Automating running an application inside a container

I'm working on a project that automatically compiles, executes and tests the output of submitted programs in C, C++, Java and Python. Obviously this needs to happen inside some sort of secured ...
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1answer
10 views

Is there a way to tell whether my EFI bootloader would accept the signature of the binary without reboot?

Assume that I have just installed a signed EFI bootloader (e.g. grub2 from Ubuntu 14.10 amd64 on a Lenovo IdeaPad U410 which can only boot in secure boot EFI or legacy mode) on a machine from within a ...
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2answers
36 views

Remove all files in specific folder in Linux

I have a particular group of two folders that are in many places on my CentOS server. Let's say these folders look like this: aaa/bbb/cat aaa/bbb/dog The names and structure of aaa, bbb, cat and ...
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1answer
2k views

Not able to mount/install vmware tools

I'm using the vmware player 6. I installed Mint 15 Olivia (MATE 64bit), everything is fine...except that I cannot install vmware tools. When I start the vm and click im vmware menu: ...
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7 views

How to execute midi commands from a Linux program

In Windows I have the OpenMidi CloseMidi and SendMidi commands. After OpenMidi I get a handle and then I can use SendMidi to send midi messages like 90 52 64 , and I will hear a note on the default ...
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1answer
15 views

Unix permissions error when working with symbolic link and MySQL installation

I'm working to install MySQL on one of our servers. I'm the ec2-user, and I'm attempting to install in the ec2-user home directory, but allowing access to the directory to the mysql user. However, ...
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2answers
4k views

How to make a desktop icon on centos 7?

I am new to Linux and this may sound very dumb but I need to make a desktop icon on centos 7 but I don't know how to do it. I tried googling but I can't even find Launcher. Need help
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Why might a partition show up in `mount` but not `df`?

If I compare this $> sudo mount | grep sdb /dev/sdb1 on /windows type fuseblk (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096) /dev/sdb2 on /store type ext4 (rw) with this $> ...
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0answers
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Wireless dongle driver don't work(Debian)

I have a WiFi dongle that said to support GNU/Linux, however no drivers were found on the CD, after hours of research i found this https://wiki.debian.org/rt2800usb and installed the driver, I'm ...
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2answers
32 views

How to echo string of another string shell variable

We would like to echo the value of a shell variable which has another variable string in its variable name. eg: we want the following output var1=1 var2=2 We tried several various forms similar to ...
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4answers
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CentOS installing jre/jdk error

[root@jony source]# sh run.sh Error occurred during initialization of VM Could not reserve enough space for object heap Error: Could not create the Java Virtual Machine. Error: A fatal exception has ...
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Setup Alfa AWUS036NHR V2 to Kali Linux

I downloaded driver for this from official site. Unzipped the archive, make install.sh executable and try execute. But error is occured - No rule to build the target modules. Stop. I executed commands ...
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lvextend gives insufficient suitable allocatable extents for logical volume set even free extents

I have one LVM with 4 physical disks (created with -i 4 option). I added 2 more disks to VG and trying lvextend which is failing. Below show I have 1TB of space Free in VG. $ sudo vgs VG #PV #LV #SN ...
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2answers
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dm-crypt/LUKS passphrase/keyfile length

I have a couple of dm-crypt/LUKS related questions. Setting up dm-crypt/LUKS with these settings: cryptsetup -c aes-xts-plain -h sha256 --key-size=256 -y luksFormat /dev/sda1 (1) Considering the ...
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0answers
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Upgrade KDE Plasma 5.2 to 5.3 in Kubuntu 15.04 Beta 2

I tried looking for a way to upgrade the KDE plasma version of my Kubuntu 15.04 Beta 2 to the latest one, 5.3. But there isn't much reference online about how to do it, expect using Unstable Kubuntu ...
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7answers
35k views

Can't Boot from USB - even with Bios set correctly

I can't boot from USB even though the BIOS is set to boot from USB first. Windows Boot manager somehow seems to be taking precedence. I have Windows 7, Linux Mint and Ubuntu installed on my ...
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0answers
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VPN failover on Tomato Router

I've configured two VPN clients on my router to ensure some of my traffic secure. One of the client is the major one and the other is the alternative one. I'm now using custom routing tables and IP ...
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1answer
22 views

Linux — How can I run a script after a video has finished playing?

I want to add the default emblem to videos I've finished watching. Any straightforward, non-manual way to run a script if and exactly if a video has finished playing? Can be for any linux ...
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3answers
6k views

Linux Mint Wifi keeps disconnecting at random times and asks for wifi password

I have a fresh install of linux mint 16 cinnamon edition. I have a Netgear wireless dongle model: WNA1000M. Is there any command i should run to get more details? Wifi drops about: 15min to 1hr.
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2answers
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How to mount removable media in /media/<LABEL> automatically when inserted, without any desktop environment?

I have a Debian sid system (Wheezy) (and same question for arch as well), without any desktop environment (and no Xorg at all). I can mount my SD-cards, USB sticks, external HDD manually with mount / ...
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1answer
13 views

VirtualBox bridged adapter not working with one network

I have been using VirtualBox bridged adapter with some networks and it has worked right. But a few days ago I have tried it with a new network and this time it has not worked. The only difference in ...
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4answers
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If I know the PID number of a process, how can I get its name?

If I have the PID number for a process (on a UNIX machine), how can I find out the name of its associated process? What do I have to do?
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1answer
4k views

How to autostart OpenVPN (client) on Ubuntu 12.04 CLI?

I have an *.ovpn file that works if I type in: sudo openvpn filename.ovpn. Now I would like to start up OpenVPN when I boot the computer. It's a headless version of Ubuntu 12.04 64-bit if that ...
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11answers
51k views

How to reliably keep an SSH tunnel open?

I use an SSH tunnel from work to go around various idotic firewalls (it's ok with my boss :)). The problem is, after a while the ssh connection usually hangs, and the tunnel is broken. If I could at ...
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1answer
9k views

Booting Kali Linux from USB from a MacBook Pro running on Windows 7

I wiped OS X from my computer a while ago and started using Windows 7 instead (school and work reasons). I am trying to install Kali Linux on my computer on a separate partition. I have tried too many ...
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3answers
5k views

How do I save the buffered flash video (on Linux)?

There used to be a method for extracting buffered flash video in any browsers (like firefox, chrome, etc.), which makes use of the command ps and spies the fd that is pointing to an in-memory ...
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1answer
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mitmproxy: How to configure a redirect for requests

I am new to "mitmproxy" and not familiar with python. I use "mitmproxy" in mode "regular proxy". I'd like to load a JavaScript file (in different version) from an other domain than it was specified ...
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0answers
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Install windows on external disk

I have a laptop (Zenbook UX32LN) with ElementaryOS system on it. I want to install Windows 8.1 on external usb HDD for gaming purposes - is it possible without interference in my linux installation? ...