Ubuntu is a free open source operating system based on the Debian GNU/Linux distribution. Consider using http://askubuntu.com/ to ask questions about it.

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Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` (cannot load such file — mysql2) (LoadError)

I am trying to install Redmine on Ubuntu and currently having an error if open Redmine page: Please install the mysql2 adapter: gem install activerecord-mysql2-adapter (cannot load such file -- ...
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0answers
7 views

How to mount HDFS on Ubuntu 14.04 [on hold]

How do I successfully mount HDFS that I set up in Google Cloud Engine on an Ubuntu 14.04 version? All the tutorials I find on the internet is wrong. The packages are broken or they don't work. Could ...
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0answers
13 views

Ubuntu fails to install cuda toolkit

I want to install cuda toolkit on ubuntu 14.04, so I downloaded cuda-repo.deb from nVidia site and then ran: sudo dpkg -i cuda-repo-ubuntu1404_6.5-14_amd64.deb But it fails. There are no error ...
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0answers
4 views

Ubuntu 13.10 can't start Unity after upgrade

Last night I ran a apt-get update/upgrade which installed several packages. This morning however, I am unable to log in...as soon as I entered my password I see just wallpaper. I've tried: ...
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11 views

How can I run a Rails server when I start Ubuntu?

I need to run this command cd /my/app/path&&rails s every time I start my Ubuntu virtual machine. I've tried to add it to /etc/rc.local file and also in /etc/init.d/rc.local but it ...
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13 views

Virtualbox in a Ubuntu Docker Container is missing Kernel Headers

I'm trying to run virtualbox in Docker for the use of vagrant. I try to achieve that with Ubuntu. This is my Dockerfile: FROM ubuntu RUN apt-get update RUN apt-get install -y ...
2
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1answer
14 views

Linux file system divided between SSD and HDD

In order to achieve better price/performance ratio, I plan to divide my file system (Ubuntu 14.04) between SSD and HDD. Things that are "read mostly" (i.e. most of OS stuff) - should reside on SSD. ...
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2answers
25 views

Transfer files over hardwired LAN for speed; computers are also WiFi connected

I am a web developer. I don’t have much knowledge in networking. I have to transfer almost 200 GB files from a Ubuntu 14.04 laptop to a Windows 8 laptop. They are connected to the Internet through a ...
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4 views

Specify manually installed dependency with Synaptic install

Libevent2.0.5 is the latest version available in the repository but I want to use libevent2.0.21 instead as I'm troubleshooting an error with Transmission. I compiled libevent2.0.21-stable using ...
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0answers
10 views

Chrome keeps opening maximized

Chrome keeps opens up in a maximized windows while I prefer it to open in normal size. No matter how many times I resize it down it stays the same on new windows. I tried resizing the windows then ...
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2answers
25 views

What is the file “-”, and why can only stat see it?

I'm using Ubuntu 12. When I type into my terminal stat -, I get the following output: File: ‘-’ Size: 0 Blocks: 0 IO Block: 1024 character special file Device: ch/12d ...
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0answers
11 views

thinkpad-10 tablet will not recognize external monitors on ubuntu 14.10

I am using a Thinkpad 10 tablet, model number: TP00064AFX, running ubuntu 14.10. I would like to extend the screen to 2 24" asus monitors. They displayed upon plugin on windows 8.1 however when I ...
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0answers
17 views

Booting from USB sends me to Grub rescue mode

I have Ubuntu 14.10 and I followed the instructions here perfectly and I used the BIOS to boot from my USB (F12, InsydeH20) and after a few seconds, it sended me to Grub rescue mode. Whenever I boot ...
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0answers
20 views

My laptop often resumes when its lid is *closed*

I have an Alienware M17x with Kubuntu 14.10. When I suspend to RAM and close the lid, very often it will wake up after a few seconds of sleep. Sometimes not. I get the feeling it's related to how ...
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0answers
11 views

On a Ubuntu PC graphics became slow and jumpy after making changes with GRUB2

I have a Ubuntu system. All worked well. Then I created a separate dedicated boot partition and got GRUB2 working on that partition. It boots. But my graphics became slow and jumpy. The resolution is ...
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0answers
32 views

Windows 8 is not booting and stuck on “automatic repair” screen

my computer is hp pavilion g series and running dual booting windows 8 and Ubuntu 14.04. I booted my computer once on windows 8 but it stuck on "automatic repair logo", I tried booting many times but ...
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0answers
8 views

Right adapter for ubuntu vm

Guest: Ubuntu 14.04 host: win8.1 I need: -Internet in the guest, if the host has internet -Access shared folders which are mounted as a drive in Win (NFS, SMB) - if the host is online and offline ...
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0answers
7 views

URL predictions not working on chromium on Ubuntu

Despite ticking the box Use a prediction service to help complete searches and URLs typed in the address bar or the app launcher search box in advanced settings, and having google set as the default ...
0
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1answer
8 views

java.net.BindException on app crashing and port already in use

I just ran a jar on a ubuntu server using a default port. The jar was stopped using ctrl+z. On restarting the port was already engaged and OS has not released the port for use. I want to use the port ...
0
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1answer
11 views

Effects of SSHing into a remote machine and logout

A silly question : I just logged out of a ssh session with a remote machine through cmd line. Is there anything that killed other jobs or turned the machine down? It all happened due to network ...
0
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1answer
29 views

How to make tap interfaces persistent after reboot?

Some tasks requires having tap interfaces configured + assign ownership. So, I am doing it manually: sudo tuntap -u <username> sudo ifconfig tap0 up sudo ip a a 192.168.1.1/24 dev tap0 or ...
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1answer
12 views

How can I change rename shortcut key to Enter (Return) in Thunar file manager?

Mouse hover method works for all other keys expect Enter. Editing /home/username/.config/Thunar/accels.scm has no effect and it reloads to previous values after logging in again.
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0answers
8 views

Ubuntu window management issue

I installed Ubuntu minimum and I'm using openbox, pcmanfm and lxappearance. When I try to run a gui application, it automatically maximizes and I can't make it normal sized on startup. This is ...
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1answer
22 views

Is installing a different distro over ubuntu on a dualboot system possible? Or deleting partition necessarily?

I run a dualboot with ubuntu 14.04 and windows 8.1. I messed up the ubuntu and now I'm going to install elementary OS instead of ubuntu. I wounder how I should do it in the easiest way possible ...
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0answers
16 views

grub-mkconfig doesn't detect /boot

lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 596.2G 0 disk ├─sda1 8:1 0 25G 0 part /mnt/arch ├─sda2 8:2 0 2M 0 part ├─sda3 8:3 0 4.5G 0 part ...
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1answer
21 views

Make internal card reader readable to BIOS

I have a tablet that only has one usb port and one internal microsd card reader. It runs Windows 8 but I want to install Ubuntu on it. I've created an Ubuntu install disk using startup disk creator ...
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0answers
16 views

USB not showing up, switching from Ubuntu 14.10 to Windows 7

My PC came with Ubuntu 14.10, I'm trying to make a bootable Windows 7 USB. I've heard that I need to downgrade to 13.10 to get WinUSB to work since it just simple WILL NOT WORK no matter what I do, ...
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1answer
27 views

Remote boot ubuntu desktop machine

I've setup ubuntu 14.04 on my iMac at home (as well as SSH & portforwarding). I can connect via SSH when the machine is on, connected, and not suspended. Similar to many hosting providers (i.e. ...
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1answer
12 views

Changing date on Ubuntu without sudo privilages

I am trying to automate a time change on Ubuntu 10.04 with a bash script using the date command. The script works, but it requires sudo privileges, however, the user who will execute the script does ...
0
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1answer
19 views

Can't install Windows 7, software center crashing

This computer came with Ubuntu installed and I want to install Windows 7 from a USB. For some reason it won't let me. I've mounted the ISO onto the USB and tried to boot from it (with safe boot ...
0
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1answer
29 views

chkdsk /f /r alternative in ubuntu linux

In windows os chkdsk /f /r will fix a hdd error automatically.i have lost access in my laptop though i am able to live boot into my laptop using linux.I have live boot ubuntu 14.04 and i am in a need ...
1
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1answer
8 views

Telling 'Find' to exclude core system directories (“! -name -'*.svn'” doesn't work)

I'm trying to do a "search and destroy" on the copy of GHC that's currently installed on my system (so I can reinstall a new version). As part of locating any residual files which may be left over, ...
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0answers
12 views

Ubuntu + Asterisk = Registration from '“100” failed for '10.0.83.202:51966' - Wrong password

I have set up a simple Ubuntu 14.04 just installing Asterisk (apt-get update && apt-get upgrade && apt-get install asterisk). When I try to log in from my client (Telephone for OS X) ...
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0answers
18 views

sudo - /etc/sudoers is world writable on Ubuntu OS

By mistake I change the permission of /etc/sudoers file on Ubuntu OS, now when applying any command using sudo, its giving error, sudo: /etc/sudoers is world writable sudo: no valid sudoers sources ...
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0answers
7 views

Ubuntu vsftpd: How to allow user to ftp to /etc, /var, etc.? [on hold]

How do I allow a user to access "all" directories thru FTP? Basically I'd like ftp access to /etc, /var, /dev, /home etc.
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0answers
7 views

Ubuntu 14.04 computer crashes after sleep?

I have a Dell E6400 with Ubuntu 14.04 installed. There is no Hibernate option, and when I try to put the computer to sleep it works. However, when I try to restart it, the computer hangs. I can move ...
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0answers
7 views

SpaceWalk Server on Ubuntu

Is there a way to install SpaceWalk Server on Ubuntu. From the great works of Google I have already found out that you can connect Ubuntu Clients to a SpaceWalk Server. As the Ubuntu SpaceWalk Server ...
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0answers
21 views

Install grub for multiple OS

On my PC, I have Ubuntu 14.04 and Mageia distribution. Recently I installed Windows 7 on a partition but could not get my grub back. I tried boot-repair but in vain and mageia is getting loaded. How ...
0
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0answers
18 views

Recover data in ubuntu [on hold]

I'm using Ubuntu 14.04 right now on my laptop. I have a laptop hard drive that I want to recover data from it. I tried every possible method to get my lost data back but none was successful as I ...
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0answers
26 views

Kolab 3.3 Groupware Server on Ubuntu 14.04

I am trying to install Kolab 3.3 on a Ubuntu 14.04 Server. I am following those instructions http://docs.kolab.org/installation-guide/ubuntu.html as well as described here ...
0
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1answer
6 views

Linux updating, downloading [Awaiting headers]

I've installed fresh CentOS and I've been having problems updating, downloading as it always either gave me an error "Trying other mirror" + "Read error (connection timed out) in headers". Then I ...
2
votes
1answer
37 views

How to find the wireless MAC address (aka BSSID) of any wireless access point

I have aircrack-ng 1.2 beta 3 and I wanted to know how I can find the wireless MAC address (aka BSSID) of any wireless access point with aircrack-ng (or any other program). I am currently running ...
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1answer
30 views

I can open a file with Ubuntu but Windows 7 says file is corrupted and unreadable

I guess the following command will work (gotten from here: http://josmangarsal.es/no-se-puede-tener-acceso-a-x-el-archivo-o-directorio-esta-danado-o-es-ilegible-windows/) chkdsk x: /f However I'd ...
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0answers
25 views

Mounting /dev/shm in a Gentoo chroot on Xubuntu 14.04

I'm trying to install Gentoo, and instead of using one of the bootable minimal install CDs provided by Gentoo, I'm using a chroot in Ubuntu. I'm mainly following the instructions outlined here, ...
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0answers
4 views

Access windows directories from Ubuntu 12.04 that runs on VMware. without file sharing

I'm was wondering if its possible for me to reach my local file system (windows) from inside my VMware which runs Ubuntu 12.04. As mentioned in the title I would like to achieve this without sharing ...
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2answers
25 views

Install windows7 theme ubuntu - fails

I am trying to install a windows 7 theme on my ubuntu OS. I follow some steps steps from another site ...
0
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0answers
8 views

How do I configure ipv6 on a LXC configured bridge?

I am trying to figure out how I can add IPv6 to lxcbr0 that LXC creates. The IPv4 could be configured in /etc/default/lxc-net but I find nothing about IPv6. Can this be done? I am running Ubuntu 14.10 ...
0
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1answer
21 views

How to protect authorized_keys file?

I have setup key-based-only SSH login (and denied root login) to my Ubuntu server ls -l /home/ernest/.ssh shows this: -rw------- 1 ernest ernest 405 Dec 14 09:17 authorized_keys Is this means that ...
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0answers
16 views

unable to login to ubuntu through putty

On most occasions, I am unable to connect to Ubuntu server through SSH, which says access denied. However, sometimes it does connect and after some seconds, goes inactive. The Ubuntu server is a ...
2
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1answer
98 views

Lenovo Y50-70 w/ Windows 8.1: What to do before deleting the D: partition?

I would like to use the space on the Lenovo's Y50-70's D: drive, for installing there Ubuntu 14. This is how the laptop's partitioning looks, out-of-the-box: And from Ubuntu: Before doing so, ...