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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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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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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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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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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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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4 views

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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2answers
25 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
10 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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1answer
20 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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9 views

which application is trying to access a private ssh key?

since a few days my Gnome based system (Fedora 21) pops up a request for the pass phrase for a certain private ssh key: An application wants access to the private key <name-of-the-key>, but it ...
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15 views

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? ...
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Tiling window manager with monitor span support

I am looking to use a tiling window manager under Linux (Fedora 21 if it matters). I searched for a couple of days in the documentation for some of them, mostly awesome, i3, xmonad, though I've read ...
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1answer
12 views

Copying data from file into a specific location of another file with dd truncates the output file

I have a loopback file that contains a single filesystem, let's call it fs.image. I have another, much larger loopback file, that contains multiple partitions and multiple filesystems, let's call it ...
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2answers
15 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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Why does sudo -n on Mac OS X always return 0?

It looks like sudo -n on Mac OS X (10.10.3) always returns 0 as a return code. So something like this will always show 0, regardless of whether the user has authenticated with his password first: ...
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8 views

How to limit the USB bandwidth a device can allocate on Linux

How do you put an cap on the amount of bandwidth a USB device can allocate on Linux? I have a couple of cheap USB webcams that I'm trying to running simeltaneously. Running v4l2-ctl ...
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15 views

Linux Command to set TCP window size [on hold]

I want to send TCP packet with window size 65535 (0xffff). I m looking to set the TCP window size to 65535 on my linux system. I know that there is the sysctl command but I could not find how ...
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7 views

shell script to change bootloader background

I'm trying to create a shell script on openSUSE to change the bootloader background from the files /etc/default/grub line: GRUB_BACKGROUND=/boot/grub2/themes/openSUSE/background.png with the new ...
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1answer
18 views

Swap Windows and Linux hard drives

Following situation: I have a laptop with a SSD and a HDD in it. Windows 8.1 is installed on the SSD The HDD holds a data partition Some weeks ago is tried to work with Linux an installed it at ...
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10 views

Change screen resolution without monitor under Linux?

I got a GUI program which will be executed along the OS (CentOS 6.6) boots. The resolution configuration is programmed in the init part of the GUI program, my solution right now is get the resolution ...
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5 views

setup vcan interface to be activated on boot

I want to setup a virtual SocketCAN interface on boot. The following lines do what I want (manually): ip link add dev vcan0 type vcan ip link set up vcan0 (or) ip link add dev vcan0 up type vcan ...
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1answer
23 views

How to find a file I've been sent through Skype in linux?

I've sent a file to my friend in Skype a year ago. All of history is saved, How can I get file from it?
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1answer
29 views

Mount only specific USB stick

I am trying to configure a Linux (Ubuntu 14.10) so that it will only mount a specific USB stick from one specific USB port. Can someone point me into the right direction on how to do this? Thanks
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1answer
7 views

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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2answers
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How is installing linux packages via apt-get different from building and compiling from source?

I've heard a lot of people say that building/compiling from source gives you optimized performance, since the compiler is able to fine tune the performance to the system. On the other hand, ...
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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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19 views

Google Chrome proxy settings “with Username and Password”?

I am able to use the google chrome under on Linux Mint behind the proxy. But when the browser starts, each time I have to enter the user and password for the authentication. Is there any way I set ...
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1answer
10 views

How to start a desktop session without x and also runs a script?

I have a Ubuntu server with LXDE for development, now how would I create a .desktop file to start a session that doesn't startx but actually logs me into a regular tty1 session and also runs a ...
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7 views

Ubuntu gnome package installation error

When trying to install insight from some ppa repositories i get these errors. sudo apt-get install insight Reading package lists... Done Building dependency tree Reading state information... ...
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1answer
19 views

Change Ownership Of Linux Directory

I Have a Netgear ReadyNAS and have set up SFTP on it. I created a user named "newuser" and changed directory to "newdirectory". If I run the command chown newuser * -R inside of "newdirectory", will ...
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How do I create the Microsoft bootloader on the EFI partition? [duplicate]

I have Linux and Windows installed in a dual boot configuration. The Windows bootloader is corrupt. I want to reinstall it using the Windows recovery partition but I do not know how to boot to it ...
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Internet sharing between PowerMac G3 running Linux and Windows 8 computer

I have a PowerMac G3 on which I have installed MintPPC Linux (a version of Debian) so I can run it as a web server. This computer has two network cards, one is in the motherboard and one is a PCI ...
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Ubuntu AMD Graphics card Drivers (AMD r9 275)

I have a Lenovo y40-80 with an AMD Radeon R9 275 graphics card. I installed the AMD Catalyst Control drivers on Ubuntu Gnome, but in my settings it says my graphics card is a TROPO XTX (6820). Here ...
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1answer
27 views

Anoymous ip route on my server

After typing "route -n" on my server, i figured out these lines 1.0.104.156 - 255.255.255.255 !H - - - - 1.9.22.84 - 255.255.255.255 !H - ...
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How to know since when a package has been installed on a linux system

How can I find out the date (and time if possible) of installation of any package on Linux Operating system. For Ubuntu and using apt-get
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Linux x64 VMWare image virtual hdd not expanding

I've been using virtual machines for a long time, mainly with VMWare Player (currently 6.0.5 build-2443746). I currently use a linux (openSuSE 12.2 x32 - KDE) virtual machine for everyday work, and I ...
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1answer
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conky execpi command only reads first 256 bytes of output

I'm trying to set up conky with conkyForecastWU using a .conkyForecast.template. I include the forecast command as follows in my .conkyrc: ${execpi 1800 conkyForecastWU ...
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FTP experts needed - FTP with TLS doesn't work, nor can i change port in pure-ftpd

Hey guys! I have been having problems with my ftp server that i have tried fixing for over a week now, and i was wondering if you could help me with it. My configuration: I am running Raspbian on a ...
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9 views

Permission denied one correct login even as root after changes to /etc/pam.d/system-auth

I changed my system-auth file in etc/pam.d to the following. #%PAM-1.0 auth required pam_env.so auth required pam_lastlog.so inactive=35 auth required ...
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1answer
18 views

File size is different in unix servers but count matches

I have a file in two servers like p01 and p11 ,both having same no of records but when i check the size both are different. Can anyone please explain me why it is like???
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1answer
21 views

Suppress extraction of __MACOSX directory when unzipping

ZIP archives produced on Mac OS X systems usually include a __MACOSX directory which is useless, annoying, and unwanted on pretty much every other OS. For unpacking ZIP archives I use Info-ZIP, which ...
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4answers
589 views

Linux command line log viewer which allows auto tail AND searching?

I use tail -f in my Linux shell, to view log files, as I like how it auto-updates with the incoming text: I like to see the new stuff come scrolling in. However, I also like the search functionality ...
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11 views

Disconnect and reconnect dongle in Linux

Do any one know how to disconnet and reconnect dongle in linux through command line (will be great if told using Ppython too). Tried to use mount, unmount command but error occurs as mount: special ...
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2answers
26 views

How to make Zsh not store failed command

Problem I'm using oh-my-zsh and Antigen to manage my Zsh. Sometimes I will accidentally enter a wrong/failed command into Zsh and it is very annoying when the zsh-autosuggestions plugin throws up ...
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28 views

Bypass Internet Filters [on hold]

I am trying to bypass restricted internet access by running it through some sort of server. I need suggestions. I can not connect to a VPN. I can set proxy settings, but I have applications I need to ...
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2answers
31 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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Determine Linux keyboard events device [migrated]

http://stackoverflow.com/questions/20943322/accessing-keys-from-linux-input-device provided working C code on how to recognize a modifier key press in the Linux text console when no other keys are ...
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2answers
50 views

How to recursivly delete all JPG files, but keep the ones containing “sample”

How can I find and delete all the .jpg files in a directory tree with the exception of the ones containing "sample" in their filename? For example : a.zip -> keep it b.jpg ...
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1answer
34 views

How can I shift the frequency of everything that comes out of my speakers?

Let's say I'm jamming on my guitar with a song I'm listening to on YouTube. It's a song that is tuned a half step down. I would like to play that song half a step higher so I don't have to keep ...
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1answer
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How to find link between /dev/video and lsusb output

Linux exposes camera interfaces at /dev/video* but that interface doesn't describe the make/model of the camera. Meanwhile, lsusb reports the make/model of all USB devices, including the cameras, but ...