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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Replacing a running Linux root filesystem

I'm trying to come up with a bash-scriptable method of replacing the root filesystem on a running PC. The system uses a MBR partitioned disk with an ext4 rootfs and a swap partition, unfortunately it ...
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1answer
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Visual Studio in Ubuntu Errors

How can I install the latest Visual Studio beta in Ubuntu through wine? It's so frustrating. I just want C# bash scripting. I get many errors. Has anyone had success?
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14 views

Ubuntu firewall rules ( ufw )

I'm new using Ubuntu and ufw command to set firewall rules. I have an apache service running and I'm able to deny the access to the root path using apache2.conf. I have another backend app running on ...
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1answer
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rsync multiple files with colons in their names

rsync interprets colons in file names as indicators that preceding is a remote machine name. When you try to rsync a file that has a colon in it's name, rsync typically gets confused, producing errors ...
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Can't access rails server on VM form host

I have a rails server on virtual machine and I need to access localhost from host. I've tried both NAT (by port forwarding - port 80 and 3000 on the guest side) and bridged adapter but nothing seems ...
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5 views

Pipe remote jpg webcam image to ffmpeg as video

I have a cheap ip webcam. All it provides is a single http url to a static jpg file. Such as http:///image.jpg. Repeatedly requesting the same url will provide subsequent frames from the ip camera. ...
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Gparted cannot resize extended or LVM partiton

I created a VM using VirtualBox and realized it was small. So, i managed (after some time) to create a new, bigger HD. Live GParted CD image (v.022): Now I need to integrate the unallocated ...
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2answers
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How to share via TCP serial port CAT

I want to connect my amateur radio transceiver to a linux (Ubuntu) computer with USB cable (serial port (in windows should be COM3 or COM4) like /dev/??? ) and share it locally with TCP, Is it ...
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What do the timestamps produced by the 'stat' command in Linux actually mean?

I have looked around for an answer but I haven't found anything that's really a concrete definition. The stat command for one of my files produces this: Access: 2015-05-21 22:30:27.731032591 +0100 ...
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2answers
27 views

SSH Private Key Authentication Failing

I'm kind of stuck here.. I am trying to disable all SSH login capabilities of root. No password login. No key-based login. Nothing. I have a user "andrew" that should only be able to SSH into my ...
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25 views

How to package linux os on a hard disk for another computer?

I want to give my friend a hard disk with a Linux operating system for his/her unused computer. Using unetbootin, I tried to install a bootable iso on my hard disk in one small partition and then I ...
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How to change Windows permissions for Linux NAS?

I have just finished setting up my new NAS (Western Digital My Cloud EX2) and I'm having trouble with permissions, I can read and write from the internal drives fine, but I have an external usb HDD ...
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Is there any Linux-only software that a budding programmer should be aware of? [on hold]

Soon, I will finish highschool, and move to a bigger city to attend college, so I will be buying a laptop PC to suit my needs. At first, I was looking for a laptop that would run Linux well ...
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9 views

Virtualbox Linux guest to inherit host user db and/or LDAP

Is there a way for a Linux guest to inherit the user db/definition of the host and/or the LDAP user of the host? By user db, I meant the users' names and group membership as visible on the host. ...
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3answers
27 views

Use dd to backup device over the network

I have a Raspberry Pi connected to the network along with a USB stick. Is it possible to use the dd command on my Raspberry Pi and automatically upload the iso to my Mac? What I mean is on my pi ...
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1answer
19 views

How can I remove all the customizations imposed by Linux Mint 17.1 on firefox?

I have found two solutions for the same: Downloading and installing .tar.bz2 package (firefox) from mozilla.org (Problem:Package provided is portable and is not installable). Installing firefox from ...
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0answers
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Which configuration files affect the routing table of a Debian system

As far as I know basic network configuration goes into /etc/network/interfaces and the system generates the routing table from these information. I was also taught that in general ...
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1answer
6 views

Where is the 'comix' linux program library database stored?

I know it's not on ~/.confix/comix/preferences.pickle since i checked that file and it has no paths or the definitions of the comic books names and paths i input to my current library. I want to know ...
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Switch from linux user to administrator; how to setup and maintain identical installations

I recently installed Linux on my computer at university. I do have Linux on my laptop and in the near future on my workstation. Additionally some of my colleagues who are doing similar computations ...
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Python Path variable can't echo by non-root

I edited my sudoers file by getting root priviledge as sudo -i Then i edited my sudoers file by nano /etc/sudoers I added Defaults env_keep += "PYTHONPATH" to sudoers Then from root i echoed ...
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How to use Windows Libre office Macro In Linux environment

I have some macro which I have made in libre office by window 7 Now I want to run those macro in Linux system through some kind of command Now issue is that How can I save Macro in a single file..? ...
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4answers
30 views

Copy paste a multiline command into command line

I'm writing a doc about installation of my soft and I have to write things like Please do the following: sudo apt-get update sudo apt-get install python-dev cython portaudio19-dev The ...
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1answer
20 views

How much resources will be used by 2 similar processes

Assuming that we talk about Linux what if we fork one process and after it will fork the similar one, is it true that both processes will consume equal amount of resources? Or maybe they will share ...
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6 views

Built in GRE keep-alive in Linux?

Is there a built-in gre keep-alive mechanism in Linux (iproute2 or such)? How do I enable that feature in such a case?
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1answer
16 views

Install Linux based Operating System on Old Computer With Slow DVD Drive

I currently have an old IBM ThinkPad, this laptop has 512mb ram and a Pentium III processor. I have decided to install Linux onto it, and the specific version of Linux I am going with is lxle, ...
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2answers
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How would you allow non-privileged users to excute files that have 774 permissions?

How would you allow non-privileged users to execute files that have 774 permissions?
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12 views

DDRescue locks system up on disk clone

I have ddrescue running on the latest version of Fedora trying to clone a dying IDE disk. When I run ddrescue --no-split /dev/sdb imagefile logfile the copy will happen then the entire system will ...
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1answer
17 views

Using nonstandard formats with a USB floppy drive?

I was given a USB floppy drive, and it works beautifully. Linux Mint detects it as a Mitsumi FDD 061M, although the case and packaging are no-brand. (Counterfeit?) It realiably reads and writes 1.44MB ...
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2answers
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Checking for changes on Linux live OS's

I am a novice to the terminal of linux live OS's (eg Kali Linux). Please advise what 1) in built programs (e.g. Syslog...), 2) Commands in the Terminal (eg ls, ps, md5sum, ...) one can use for ...
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Virtual Boxes, Linux hosts, Windows guests, Shared folders and Recycle bins

Basically what I am looking for is a way for sharing folders between my Debian Jessie host and Windows 7 guest without the fear that I accidentally delete files under Windows and have no (convenient) ...
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0answers
5 views

Apache Spark Building Memory Issue for JVM Initialization

I am currently building Spark on my linux Red Hat 5 VM just for experiment. However, when running the mvn script or sbt script inside the spark 1.3 version source code (downloaded from the github), it ...
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3answers
22 views

How can I use the output of ls/grep as input for pdfunite

I want to use pdfunite to merge several pdf-files into one output file. Since the directory contains lots of different stuff, I thought i could use ls/grep to get the apropriate file-names and then ...
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USB 3.0 Trouble

I am using a WD Elements Portable 1TB USB 3.0 2.5" disk bought in May 2014 to backup data of my desktop machine. rsync runs smoothly without any error messages. However upon restoring data from the ...
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1answer
27 views

Install grub raid1 & lvm

I have installed an Ubuntu Linux on a machine where there was a RHEL (from Dell) At the end of the installation I got a message that GRUB2 could not be installed. So I booted into a Live Linux (from ...
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2answers
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`sudo adduser username admin` leads to `adduser: The group `admin' does not exist.`

I'm trying to add a user to the sudoers file with the simple command sudo adduser username admin but I get adduser: The group 'admin' does not exist. So I checked out the sudoers file (sudo visudo ...
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1answer
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How to switch between command-line and GUI in VM on a Mac?

I have installed CentOS 7.1 in VMware Fusion of my Mac. I logged into the terminal (default runlevel 3) and started the GUI using the command "startx". I want to switch back to the terminal. ...
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3answers
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Command vs program?

I was looking up the difference between adduser and useradd, and an explanation is that useradd is a command while adduser is a perl script. I understand what a perl script is, but what I do not ...
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2answers
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Nuke thumbdrive and set GPT+Partition

After using my 16GB USB2.0 thumbdrive as an ESXi boot stick I am now unable to format it. Windows Explorer would just say: The drive could not be formatted (or something likewise) Diskpart is ...
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3D printer with Arduino 2560 on Linux: Printer software can not find the printer

I am trying to setup the software for a 3D printer (Delta printer connected via an Arduino 2560) on Linux. The system works with RepetierHost and RepetierServer on Windows 7. I have tried ...
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VMware host-only network accessing host local resources

I have a Debian server (LDAP,DNS,DHCP and SAMBA services) in a VMware virtual machine and I would like to reach the host local printer with it. The first interface eth0 is a host-only network with the ...
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2answers
23 views

How can I list the contents of an lrzip file without extracting from the Linux terminal?

How can I list the contents of a lrzip file created via lrztar without extracting it?
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1answer
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What does it mean when a system boots into initramfs?

I copied kali Linux 32 bit onto a USB stick using Win32Diskimager and Universal USB Installer. On a Lenovo X200 it boots withoug problems. Both methods. (P8400, 8 GB RAM, HDD) Then I tried to boot ...
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1answer
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KDE launcher opens .desktop files in kate

Opening programs via the 'Application Launcher' menu, then selecting the program works. Using the launcher generated on the panel, eg by right-clicking on an open program, then selecting 'Show A ...
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Ubuntu 14.04 LTS corrupt microSD - manual recovery?

i have a corrupt microSD card from a colleague. He asked me to save his data if possible. I use a recent usb-multi-cardreader. The microSD is a high capacity card with 32gb of space. I suspect it to ...
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0answers
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Recovering data on 20TB RAID 5 NAS, overwritten by 500gb RAID 1

I have a Linux gateway with 2 500gb drives in software RAID 1 for system. /dev/sda = RAID 1 /dev/sdb = RAID 1 /dev/sdc = RAID 5 (NAS 12 drives iSCSI, /home directories) While replacing sdb, weird ...
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1answer
20 views

GUI terminated with return code 4

i am getting the below error . Could you please help me resolve this Invocation target exception: Can't connect to X11 window server using 'dummy0:1.0' as the value of the DISPLAY variable; you ...
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2answers
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Why must I use sudo for ssh public key authentication to work?

I cannot ssh from my computer (OS X) to my raspberry pi (ubuntu mate), unless I use sudo. I am using a public/private keypair to authenticate. The appropriate public key is added to the ...
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1answer
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Linux command/script to find all files in a directory with a 4 digit number <= a specific number

I have a folder containing several other folders, each named in this format: Company XYZ (1999 OneWordDescription) I'm trying to filter out the ones that are marked 1995 or older, so I can move ...
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1answer
24 views

What does qsub --cwd `pwd` mean?

I am newbie to Linux command lines. I just got a queue submission command from others. The command line is as follows: qsub --cwd `pwd` -t 60 -n 1 --proccount 1 --mode c1 --env ...
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Linux: USB Device Constantly Disconnecting/Reconnecting

I'm getting a lot of log spam about a USB device constantly connecting/disconnecting. It's my USB for my UPS, attached to my Dell PowerEdge server, but I'm not sure why it keeps getting kicked ...