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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How to save SSL certificate in terminal without openssl?

I've got the following scenario: A service runs on server-1, calling server-2 via SSL over proxy-1 Server-2 is external and out of our scope Server-2 can only be reached from server-1 over proxy ...
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How to start a systemd service after user login and stop it before user logout

I have a Fedora 23 Machine. I have a directory/file synchronizing bash script that synchronizes my local /home directory to a remote directory (in a NAS machine). I run it manually but I would like ...
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sed align all lines to last line in a file Bash script

I have a files with below lines Dev_Campaign_1873.rpm Dev_Campaign_1987.rpm Dev_Campaign_9876.rpm http://52.30.241.107:8081/artifactory/api/storage/adifact Trying to get the output to a file as ...
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Disable WLAN as kernel boot option?

I have a CubieTruck Plus (CubieBoard5) running Linaro. It has an ethernet port and wifi card. I want to disable unneeded services and reduce power, so I want to stop anything related to wifi and wlan0 ...
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CentOS can't see RAID array partitions

I have the current setup composed by (4x) HDDS sda, sdb, sdc, sdd partitioned in the same way: /dev/sd[abcd] | |- /dev/sd[abcd]1 [EFI FAT 32] |- /dev/sd[abcd]2 [Linux RAID] |- ...
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Cannot paste folder into Nautilus

The CentOS 6 version of Nautilus offered 2 modes for displaying the directory/folder heirarchy: Graphical format Text format: as follows /this/is/the/folder/in/question A great thing about this ...
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1answer
16 views

NTP sync issue on client servers

Does starting up NTPD daemon will automatically sync the client server with NTP server? Our server is running 5 mins behind the current time when we checked the service was in stopped state so does ...
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8 views

How do I catch and log all attempts to write to /dev/null?

Essentially I'm trying to catch output any scripts that are currently running and silencing their output. So the question is fairly simple, how do I log any attempts to write to /dev/null?
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Phantom files possibly?

Can someone tell me why if I delete files out of a folder on Microsoft Windows OS, the same folder will still show those files I "deleted" on a Linux OS, specifically Red Hat Linux OS if I copy that ...
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WiFi stops working after reboot Fedora

I have just installed Fedora 23 on my Lenovo Z570 (it has an Intel Centrino N-1000 Wireless card). The installation finished, I rebooted and everything worked fine. But after I shut down my computer ...
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Is it a good idea to use git for configuration file version controlling?

I use Gentoo Linux and it has rather complex configuration. My question is it wise to use git for version controlling my config files? I have some git repos in my home, my guess if I put /home/** to ...
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Cannot boot from CD or USB

So a few days ago I tried to install Zorin OS from a usb I installed Zorin OS on my USB with a program called: Universal USB installer and isotousb. But when I got in my Boot menu and choose Boot ...
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NGINX X-Frame-Options allow only from single page

I am trying to setup my vHost to allow iframes from only one subdomain of our network. Before we had: add_header X-Frame-Options "SAMEORIGIN"; on all our pages. To accomplish what I want to do I ...
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1answer
78 views

promiscuous mode not working

I've searched, and heard that the promiscuous mode lets us listen to all wireless trafic in the Access Point that we are associated with. But when i use this mode with wireshark, i don't get the exact ...
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9 views

How to join a WebRTC session with a Raspberry Pi 2 and Camera module?

How does one get a working setup to join a WebRTC session (e.g. https://opentokrtc.com or for testing https://test.webrtc.org) with a Raspberry Pi 2, the official camera module (and a USB soundcard)? ...
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what is the correct way to clone everything to another USB disk?

I have a 1T USB disk with Fedora 20 installed. The total space used is about 40 GB. There are three partitions by default: swap, root and user1. I want to move/clone/copy the entire installation to ...
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7 views

Request authentication on gatt server with BlueZ 5.37

I am running on a rpi a gatt server(example-gatt-server modified) using BlueZ BLE stack and all runs just fine but i was wandering if anyone managed to set up a PIN authentication for the server. ...
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23 views

Normalize varying audio levels in a single video

I have a script to process/encode videos. Some of the videos have varying audio levels (like 2 videos were merged and one had loud audio and other quiet audio). I want to normalize the audio in a way ...
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Wordwrapping existing text

I've been googling around and discovered that I can word wrap in vim by first :set wrap linebreak nolist, then set tw=80. Text I now type will be word-wrapped. If I want to word-wrap the text already ...
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Upgrading gcc, ghostcript and aliases

My problem has multiple faces and I will really appreciate if anyone can help me sort it out. The origin of the problem can be traced here: High memory usage of eps file So, I thought I better ...
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14 views

Why does my machine not boot?

I think this is a HW issue so maybe I'm in the wrong place, please redirect me in that case. History I have a Lenovo 9142 that has been installed with Ubuntu and running as a developer machine for ...
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23 views

Scan outgoing traffic for sensitive data

I run Windows on my desktop, but I would be willing to route my traffic through a Linux box if required. I've had two instances of my credit card being misused in two months now. Despite being ...
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putty keyboard not working completely

I was trying to set up SSH for websites however keyboard completely doesn't work anything at all for putty. It would be great if someone can help me. I'm using Toshiba Satellite laptop with Windows ...
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24 views

experiment with ARP (NETWORK lab)

I wanted to know if we ping the loopback interface by typing "ping localhost" at console prompt,could any ICMP packet be obeserved on the output of my TCPDUMP? and why?
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Looking for chrome version 46 for linux (x86_64 rpm) [on hold]

I was trying to download chrome version 46 for linux (x86_64 rpm) This post How do I install a previous version of Chrome? has suggested a way to find it from commondatastorage.googleapis.com. But I ...
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Equivalent of Karabiner for Linux

Is there a way to customize the keyboard in Linux that is as powerful as Karabiner for Mac OS X, e.g. that has the equivalent of __KeyOverlaidModifier__ and supports different behaviors for different ...
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How to construct a proper command string in bash? Quoting issues, I think

I have a very newbie question, I am sure. I am trying to construct a script to edit the internal EXIF timestamps of a number of JPG photo files, using the commandline exiftool utility. My actual ...
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Samba 4 Active Directory in Slackware 14.1

While trying to setup Samba 4 Active Directory in Slackware 14.1 32 bits I did (just after a fresh install): # samba-tool domain provision --use-rfc2307 --use-xattrs=yes --interactive Realm: ...
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Debian: email notification when java app is down

I have dedicated server and many launched screen sessions. And sometimes apps in this screen sessions are going down (java apps). I can't always monitor this so I want to receive a email notification ...
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1answer
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How to set linux as default OS after reinstalling windows already dual booted envirnment?

I have a system running windows and linux in dual boot envirnment. But due to of some problem i have reinstall my windows but now my boot menu only shows windows OS. I want to know that how i can ...
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1answer
24 views

USB drive not recognised on windows 10 or linux

I have a usb drive that is not showing up in windows 10 or linux mint which leads me to believe that it is the drive that failed and not both of my computers. lsusb does not show the drive and it does ...
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Can't change default sound input raspberry pi 2

I'm trying to set up speech recognition for the raspberry pi 2, and I have been using this website https://sites.google.com/site/observing/Home/speech-recognition-with-the-raspberry-pi. I have my ...
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creating linux device files for bootstrap

I'm currently independently researching device files as a part of learning more about the Linux system in depth. My current goal is to bootstrap Debian Linux through cdebootstrap. I followed the guide ...
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2answers
37 views

Cannot connect to local SSH server - bad file number

I have an Odroid XU4 with Ubuntu 14.04 server on it. I installed the ssh server with apt-get install openssh-server. I got the local IP with hostname -I, which is 192.168.0.186, I generated a random ...
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Unable to add spaces

How can i add spaces between my outputs using sed/echo or any other command in linux? Preferred Output: Virtual Machine Test01 status Running. Virtual Disk Test01 size 61GB Physical Disk ...
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How to make (and restore) an application snapshot in runtime?

I'm trying to make a snapshot of a running application, in runtime, and restore it afterwards. By 'snapshot' I mean complete state of my application - I suppose that's just memory pages and CPU ...
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1answer
21 views

Best location of config files for Linux hosted web application?

As I'm a programmer and not an admin I hope you can help me out: Currently I'm writing a web application that uses (XML) config files that the user will be able to also edit them through the ...
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50 views

eps files very high memory usage

I have been struggling with this problem from some time. Whenever I load an eps file into latex or even for simple viewing purpose, it consumes lots of RAM. Eg. a typical 300 kb eps file consumes ...
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24 views

Linux - keep USB HDD alive programatically (no spin down)

I have faulty HDD attached to 24/7 server, which sometimes throws I/O error after spin up. Thus I want to prevent it from spinning down programatically. It's about 6 years old Samsung G3 Station. No ...
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ioctl error during btrfs send

I am getting this error when I try to back up my @home btrfs subvolume from my laptop running Arch Linux to my external drive. This seems like a straightforward error, but the strange thing is that I ...
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why USB drive cannot boot from Fedora machine but can from Windows machine?

I have WD Mypassport 500GB USB removable disk. I installed Fedora 20 on it. it works fine when I boot it with my Windows machine but I cannot boot it with my Fedora machine. If I attached it to my ...
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2answers
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How to unset a “>” echo in Linux

I've just realized I don't know how to unset an echo I set with >. The exact current situation is I just set dmesg > /var/log/syslog and now wanted to unset it, realizing I've never done that ...
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Refit old CISCO 5505 ASA hardware with Linux/FreeBSD software - (for the experience)

I was given an old Cisco 5505 ASA (EOL). The device hardware meets the specs for what could work in a small network, and I would like to replace the Cisco IOS with a unix open source option, like ...
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1answer
20 views

Can't dual-boot Windows 7/Linux Mint (UEFI)

This post is going to be kind of long because I've done a lot of testing. Until proven otherwise, I'm going to assume this incredibly bizarre issue is caused by my computer being haunted. I'm also ...
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19 views

Partiton Requirement for Linux

I am new to Linux, I want to install it on my laptop which currently has 2 partitions C: which has windows 10 and F: which has 700 GB capacity. I want to install kali Linux, I want to know how many ...
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How to write a new Linux kernel driver? [on hold]

I found this tutorial: http://www.x.org/wiki/Development/Documentation/XorgInputHOWTO/ It says: Note that if you think about writing a new input driver for a “common” device (e.g. touchscreen, ...
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Linux stuck on boot up, windows bootloader overwritten

Ahoi. I recently installed debian on my windows 10 machine, and have essentially bumloved my entire machine, it seems. I installed Debian using the 8.3.0 DVD Image from the official site, and the ...
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Play stream with VLC on Ubuntu 14.04

I have Ubuntu desktop 14.04 with two NIC, eth0 and eth1. One is just for internet and the other one is on local subnet where multicast UDP stream is coming. Default route is on eth0, and multicast ...
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Can't access files in SMB share

I'm trying to mount some share from my synology NAS via SMB. I'm using Linux Mint and when I mount it over the GUI ("Computer"->"Network"->"NAS"->"Sharename") everything works fine. But I want it to ...
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Transmission-daemon and security [on hold]

Recently I have installed and configured transmission daemon on my server, but I wounder how I can increase security of it. I am using nginx to provide access via ssl but I have a question about ...