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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Apache Processes Randomly go to high CPU for 25 minutes on EC2/RHEL/Glassfish4 [migrated]

I have a server that receives large POST (100,000 chars max) requests and passes them back to a Glassfish4 application server using mod_jk. The requests are POST requests with a content-type of ...
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20 views

Cannot start xserver on client after mounting root directory on NFS share

As the title suggests, I'm having issues starting an X session on my client machine. Client is a Raspberry Pi 2 running Raspbian, this was setup and configured to auto login and launch Chromium at ...
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23 views

Particular bash bc usage not storing result in variable

Unfortunately this result in a empty variable, and bc command print its result to terminal anyway while trying to attribute to aux aux=&(bc -l <<< "scale = 5; ...
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1answer
13 views

Environment Variable PHPRC got ignored

I'm using ubuntu 14.04 with php5 version 5.5.9 and starting php via spawn-fcgi. In the fcgi starter script I added an environment variable PHPRC and exporting this variable. export ...
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1answer
81 views

Fail device in md RAID when ATA stops responding

I had created five 1TB HDD partitions (/dev/sda1, /dev/sdb1, /dev/sdc1, /dev/sde1, and /dev/sdf1) in a RAID 6 array called /dev/md0 using mdadm on Ubuntu 14.04 LTS Trusty Tahr. The command sudo mdadm ...
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Connecting via windows remote control to Centos(Xrdp)

I'm having a problem of printing text in code editor via rdp. I think problem a rise a specially using shift + key and F1- F6 keys, for example: When trying to print ":", I usually get: ...
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7 views

How do I prevent GNOME/openSUSE from changing which screen a program is on?

I'm using GNOME 2.28.2 and openSUSE 11 with two monitors. I keep my file browser on my left screen and my pdf reader on the right screen. When I open a new pdf from the file browser on my left screen, ...
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9 views

KVM inserts CD ROM at reboot even if kickstart has “reboot --eject”

When installing a VM on KVM host with a kcikstart profile that specifies "reboot --eject" option, on one specific host in our lab, the CD is re-mounted and the installation starts again. For another ...
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23 views

Tool for filling the mac address slots in router?

i learnt a linux tool a couple of weeks ago that could send random mac address to the router, thus filling the cam table and after taking all the empty slots could cause a kind of denial of service, ...
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1answer
22 views

ssh into local machine from remote maching

I would like to ssh into my local machine, from a remote ssh shell. by looking at ifconfig $ ifconfig wlan0 Link encap:Ethernet HWaddr 60:d8:19:24:bd:8b inet addr:137.44.181.163 ...
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23 views

how do I grep only the user created profiles among all users in linux ?

From the below output , I just want celesial and neetish user I can't figure how to do it though . celestial@celestial:~$ sudo repquota / *** Report for user quotas on device ...
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31 views

How to clone failing system disk to preserve all settings/installed software?

I have an internal 320GB SATA HDD which is showing signs of impending failure (errors while copying,SMART status etc.). I have another internal HDD available with me to which I would like to migrate ...
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24 views

How to access router from virtualbox guest windows system?

My router has printserver (192.168.1.1:9100) My host system is linux (192.168.1.200) My guest system is windows How to access router's printserver from guest system? Should I use "bridged network"? ...
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1answer
45 views

Execute command after broken SSH connection

Is there a way to execute a command after an SSH connection is broken (blackout etc.)? When I normally log off I can just use .bash_logout but I don't know what to do when my connection breaks.
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Filezilla not asking for SSH-key password under LXQt

I can not connect to my webhoster with SSH Key in filezilla under LXQt. Filezilla does not ask for the SSH-key password like GNOME does, and says authentication was not possible und no connection was ...
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11 views

How to test ARM Ubuntu under Qemu the easiest way?

I would like to play with ARM version of Ubuntu (with graphical support) under Qemu, but I have problems finding any tutorial on how to get it done most easily (I would prefer to just download some ...
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7 views

Can kexec be used to start Linux on a separate partition?

Assume I have two partitions. Each contains a full installation of a different distribution. I know kexec is like using one kernel as a bootloader to start another. But can this process be used to ...
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1answer
21 views

linux console on nuc without serial ports

I'm running a small, headless home nas + dvr on an intel nuc using ubuntu server, nothing particularly grand. I have occasionally run into problems if I have to reboot it for one reason or another and ...
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16 views

How to limit swap usage?

I want my computer to automatically hibernate when the UPS switches to the battery, so I need enough free swap space at any moment. But if I activate the swap partition, even right before the ...
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1answer
25 views

Why does my vim colorscheme stay after I close vim?

I recently used vundle to install the solarized theme for vim on my Arch Linux machine. Whenever I open vim, the theme is applied, but it stays applied to my terminal window after I close it. I can ...
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16 views

PostgreSQL and database cluster ownership on shared storage

For my research, I am using an always on virtual machine for the primary analysis of my data. In doing this I need (or, I suppose, would like to) create and store the data in a PostgreSQL database. ...
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2answers
27 views

Windows 8.1 dual-boot with openSUSE boot failure

I already have Windows 8.1 on my newly built PC and wanted to dual-boot with openSUSE. I wrote the install image to a USB, but the install kept hanging so I used network install (also written to a ...
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32 views

CentOS 7: Partition resizing issue where now there is a lost+found folder full of numbered folders and the data is gone

Set up Running a home server with a 2TB HDD. Running VMWare ESXi 5.5 that has 2 guest OS; CentOS 7 and Windows Server 2012 R2. There are 3 virtual disks (VMDK) thickly provisioned: 20GB CentOS 7 ...
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1answer
15 views

Linux autostart application focus

Is it possible to have an application run by a autostart file like .config/autostart/app.desktop attain focus on start up? Window manager used is OpenBox, but it seems most window managers don't ...
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12 views

Chrome browser kiosk mode initial focus on Linux

If I run Chrome with the --kiosk flag from some startup file (eg. .config/autostart/chrome.desktop) on Linux / Openbox, it doesn't attain focus on startup. Wich is o.k. for mouse or touch controlled ...
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44 views

xset dpms command is not shutting down the monitor

I have a problem with this command: xset dpms force off. It puts the screen black, but it doesnt shut down nor suspend (with suspend command) the monitor. The command 'xset -q' shows that DPMS is ...
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1answer
25 views

xrandr | grep “ connected ” give me more than one line but IFS=$'\n' read can't break it

I have something like this: declare -a DISPLAYS AUXILIAR="$(xrandr | grep " connected ")" IFS=$'\n' read -ra DISPLAYS <<< "$AUXILIAR" Why it isn't detecting line breaks if echo ...
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34 views

Native Windows Libraries Under Wine

As we know, Wine has the ability to run windows native Dlls instead of it's own library files. For example you can use the original d3dx9.dll instead of wine's own d3dx9.dll implementation. Does ...
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2answers
47 views

Clone Linux/Win7 dual-boot to smaller hard drive?

I have a Linux Mint / Windows 7 dual boot setup that is on a big hard drive that I'd like to use for something else. I have a smaller hard drive that will fit everything with room to spare. ...
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1answer
32 views

Error while trying to execute cron script with space in path

I have a script with several rsync commands in it. The script file is placed in an NTFS partition with owner and group permissions set to root. I have no problems running the file manually from the ...
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16 views

Unresponsive desktop on all Linux distributions

I have an Asus X550LN laptop (Intel i7 4500U, 8Gb Ram, Nvidia 840M), I am trying to install any Linux distribution on this laptop for a year now and I am encountering the same problem. I downloaded ...
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38 views

AMD catalyst driver crashing X.org on Arch Linux

(repost from https://bbs.archlinux.org/viewtopic.php?id=199923) I'm trying to get the proprietary AMD driver to work on my Lenovo B5070 laptop. The opensource drivers seem to work fine, but I need ...
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1answer
66 views

Why might a file transfer be going hideously slowly on Windows, but fast on Linux?

I realise this might be an impossible question to answer, but here goes: I have an embedded board that I've written a load of software for; this board can be sent a new firmware image (image here is ...
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How to change large number of file names in linux?

I'm running openSUSE 13.2 64-bit and have about 1,500 .mp3 files I have to change. All I have to do is remove all of the ":" and "?" from the file names because I can't copy them to Fat32 filesystems ...
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27 views

Linux Mint- Have to constantly reset my internet to work?

I bought this ASUS desktop recently and dual-booted it with Windows and Linux Mint. It comes with an antenna for WiFi. However, on Linux Mint my home network connection keeps dropping and it ...
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2answers
22 views

Make address/url only available when VPN is connected

I'd like to try to make an address/url only available to my PC (Linux) when my VPN is connected and absolutely unavailable when it's not. That means no ping and nothing else. It should act as if the ...
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1answer
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PREFIX in Makefile

I don't really know how to give this question a title, since it is pretty weird to me. I'm gonna try linux form scratch, but I'm doing some research first. I'm stuck with compiling packages from ...
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1answer
23 views

Extending Fedora lvm2 partition

Recetly I've run out of space on my disk and I've decided to reallocate some unused space from one of the NTFS partitions to extend Fedora's partition. I've been reading about resizing LVM2 partition ...
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14 views

How to install and configure Nagios-MNTOS? [migrated]

I just tried to configure MNTOS for my 2 Nagios server. I'm very new to this tool. I do not get a clarity on the installation. Should i install MNTOS on a separate server or any of my 2 Nagios ...
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60 views

racoon IPSec/L2TP Client

I try to configure a racoon IPSec/L2TP client to connect a Windows 2003 server. The server is originally intended to be used with Windows XP clients (successfully tested with Windows XP SP3 but ...
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46 views

Can't recover sd card

I have a SD card I can no longer access. I would like to recover its data. I use a USB SD card reader. When plugged in, the SD card is not mounted, not shown with fdisk -l. Output of syslog when ...
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2answers
34 views

How do I interactively type \r\n-terminated query in netcat?

$ nc example.com 80 GET / HTTP/1.1 Host: example.com HTTP/1.1 200 OK ... It works, line separator is just 0A here instead of required 0D0A. How do I type a 0D0A-separated query in netcat? It is ...
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58 views

Ubuntu and LogiLink 4-bay docking station - unable to get S.M.A.R.T. data from all disks

I recently bought LogiLink QP0021 USB2.0 4-bay docking station. It is visible as: 152d:0539 JMicron Technology Corp. / JMicron USA Technology Corp. JMS539 SuperSpeed SATA II 3.0G Bridge: for the ...
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1answer
37 views

Installing linux on unallocated partition

That's my HD. I want to install Elementary OS (Ubuntu based) on that unallocated partition without loosing Windows or any other partition. I tried to make a new partition out of it in gparted but it ...
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1answer
41 views

permanently change permissions of linux system file

I often use my computer in text-only mode, so no X11, no window manager, etc. I'd like to be able to adjust the screen brightness of my laptop while in text mode, which I can do by writing to the file ...
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35 views

Cannot SSH to Server after OpenSSH upgrade

One of my developers has taken it upon himself to update one of our production servers without backup to OpenSSH 6.2p, this server is and ubuntu box running in EC2, and now we are unable to SSH to it ...
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26 views

How to manage connection speed of an interface in linux [on hold]

I am making a website and testing it in my laptop. I wanted my mobile to connect to the apache server through browser and also see the website there. So I made an Access Point with airbase-ng (on ...
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1answer
15 views

Using strace, how do I use it to get the network and serial calls

I have a python program that runs in the background, what I need to know for debugging purposing is that I need to see what calls it is send and receiving for serial, network and to stdout. I know ...
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93 views

Low VPN (PPTP, OpenVPN) performance on raspberry pi

I own a raspberry pi modebl b+ with Raspbian and kernel 3.12.26+ installed. I recompiled the kernel and enabled pptp module in order to use it with pptp_accel Using the same VPN provider and their ...
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3answers
314 views

Can I install Linux on a computer that has Windows 7

After installing Windows 7 on my computer that had Linux,Windows 7 erased everything that was part of Linux,including some games that I like. I doubt there is a way to recover those files. But,is ...