Ubuntu is a Linux distribution with an emphasis on ease of use and installation. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Set user-wide network proxy settings on Ubuntu (without restart)

Is there any reliable way to set proxy settings user-wide for all traffic on Ubuntu? As far I'm using {http|https|ftp}_proxy variables in /home/$USER/.bashrc which is nice but there's some issues: ...
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16 views

OpenVPN on Ubuntu VM

I am trying to create a VLAN Network from my home network for a web-dev platform. I am running Ubuntu servers in VirtualBox on a Windows 7 machine. I am running an Ubuntu DHCP/OpenVPN/Shorewall ...
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0answers
12 views

Yakuake doesn't save shell setting

When I change the shell appearance opacity it works fine but when I reboot Ubuntu again, the opacity is back to 0 and I have to configure it again. How can I save the Yakuake settings? I am using ...
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1answer
23 views

Linux with VM Windows guests in kiosk mode

We have a bunch of computers in our school, which are used by many students and some of them are really having fun in messing around with the system. However it's not possible to restrict access to ...
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17 views

trying to limit FTP users in proftpd

Have proftpd installed in Ubuntu 14.04 LTS It is running fine, and I have ProFTPD listening on two different ports for both unsecured ftp connections and sftp connections authenticated with private ...
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1answer
18 views

HP SmartArray RAID5 recovery on linux

This is a long time in the making, and I've finally got it working so I thought I'd share this with as many people as I can in case they're in a similar situation. Long story short - HP SmartArray ...
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0answers
34 views

Mount proc filesystem in a docker container

i want to install gitlab vcs in a docker container with ubuntu base image on it. But when i run gitlab-ctl recofigure, it can't write to a file on proc fs. How to mount or run docker to provide rw ...
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0answers
25 views

Use VirtualBox to access site on host from guest? the host and guest is linux

I'm running VirtualBox on a Ubuntu (host), the VM I’m using is fedora (guest). VirtualBox is setup to use the NAT network adapter, and I'm able to get to the internet. I use Port Forwarding to access ...
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1answer
21 views

`rvm list remote` not showing binaries for Ubuntu 14.04 box

I'm trying to provision a dev box with rvm on Ubuntu 14.04 (via Vagrant and Ansible). I've installed rvm: gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3 \curl -sSL https://get.rvm.io | ...
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76 views

No ttyUSB when connecting USB-RS485 to Beaglebone Black

I'm trying to connect a externally powered board to control the motors of a robot to my BeagleBone Black. I'm using ssh over USB(the mini-usb) to control the Beaglebone from my laptop. The BBB is ...
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1answer
33 views

MacOS X Mavericks running VirtualBox cannot communicate with Linux VM

I have a MacOS X Mavericks host running Vagrant using VirtualBox as a provider. I have experienced several times that with different VMs (particularly Ubuntu Linux VMs) after the first time the VM is ...
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1answer
32 views

Shutdown so fast on iMac

I'm using Ubuntu 14.04 on iMac 27 in dual boot with OSX via rEFInd. It works nice but when I click to shutdown the Ubuntu it is so quickly and the screen becomes black in 1 or 2 seconds. So I can ...
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3answers
88 views

Ubuntu 14.04.1, 14.10 base distros take 30min+ to get to splash screen

Update: I've found a temporary workaround, but I would still like to find a more permanent solution. Workaround: I startout the boot process with the laptops battery removed. If I do this it boots ...
1
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1answer
84 views

How to clean /tmp?

In general, how can we clean /tmp for freeing up the space taken by non-needed files? Note that I once made a mistake by deleting everything under /tmp, and then after rebooting, my Ubuntu was ...
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2answers
50 views

Why can't I change the hostname of my server using sudo? [duplicate]

From a user that is part of the sudoers group, I can normally run any command by doing sudo <command> But the following command fails stating "Permission denied" sudo echo "myhostname" > ...
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1answer
63 views

dota 2 graphics problem in ubuntu 14.04

i installed ubuntu 14.04 in my laptop. then i installed steam and finally dota 2. but the graphics are very bad. i have amd raedon 7400 in my laptop. it seems like dota 2 is not running through my ...
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2answers
23 views

How to properly mount new hdd, to free up the old one

I installed a new hdd /dev/sdb1, and mounted to /home/ubuntu/new1, and moved some files there to free up the old hdd, but when I do du -h new1 is still takes space in the old hdd, below are my fstab ...
2
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1answer
18 views

Cannot write to sector - boot Ubuntu

So I was in an airport working and I closed my laptop. When I brought it back up again, my screen was black so I kill switched. Now when I boot, I get "cannot write to sector". Anyone got any ideas? ...
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1answer
26 views

Linux system files moved, how to return by booting from an installer?

So I accidentally 'sudo mv' my files from /* (root directory) to some directory inside my home directory. My OS stopped working and I rebooted. Then I encountered the error: file ...
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0answers
19 views

Mounting synology disks in ubuntu

I have some files on synology disk that I would like to recover with extundelete. I have mounted the raid1 setup. So on the disk is two raid storages (md2 and md3) and they are connected to one with ...
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0answers
23 views

Network communication between two nodes in a Hadoop cluster

I am running a 7 node hadoop cluster with each box running Ubuntu 12.04. It is running CDH4 setup using Cloudera Manager. It was already setup and running when I came in but now I'm running into a ...
2
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1answer
54 views

ubuntu does no let me log in to my user, how can I fix it?

My ubuntu has just crashed. Now that I restarted it, it does nothing when I enter my password. The screen just gets refreshed leaving the password space empty again. However, if I try to enter a wrong ...
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1answer
43 views

Received DUP when using ping. What should I do?

I was pinging Google last night and one of them came back as DUP(!). I did some reading and I found this in the man pages on ping(8): Damaged packets are obviously serious cause for alarm and ...
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1answer
64 views

Grub2 lost in new Linux distro install

So, I really need some help. Recently I was using a dual boot machine on the same hard drive. I had Windows 8.1 and Ubuntu GNOME 14.04. When I installed Ubuntu on top of my Windows install, I didn't ...
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2answers
61 views

Minimal install of Ubuntu

I'm fairly new to linux but I want to install it on my chromebook with crouton. Is there a way to install something like lubuntu or xubuntu without any of the software normally bundled? For example, I ...
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0answers
18 views

bugzilla access by client

I have installed the bugzilla in one virtual machine and another virtual machine i just executed bugz command to store the comment on appropriate bug in bugzilla. bugz -b ...
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1answer
54 views

Set maximum volume in Ubuntu/Gnome

I have the following issue with my volume settings (Ubuntu 12.04, 3.2.0-49-generic, Gnome 3, Lenovo X220): When I set the volume to maximum using the hardware volume keys, I get to "100%" in the Audio ...
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2answers
34 views

how to solve the error in cinder on openstack havana?

I am install openstack controller node for one machtion, and Another metchion running nova-compute only. so I am running controller node cinder will got error. I clearly meantion it which service ...
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1answer
34 views

Cant revert back to ubuntu from lubuntu

So this was my first time doing a dual boot in my computer and i successfully did install ubuntu. However, in ubuntu i curiously downloaded lubuntu (since someone said that it was faster since lubuntu ...
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1answer
17 views

Does an SFTP login get accounted for with `last`?

The title says it all. At first glance it dodoesn't show, but I also just learned about the existence of last as well.
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0answers
11 views

Auto-refresh NAS list in FreeRADIUS?

We're using FreeRADIUS to allow routers to our hotspot network: FreeRADIUS Version 2.1.12, for host x86_64-pc-linux-gnu, built on Feb 24 2014 at 14:57:57 We filter routers by their nasname in a ...
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1answer
68 views

Update single package from Ubuntu Utopic Unicorn when running Trusty Tahr

I'm tasked to update a package on a Ubuntu Server Trusty Tahr installation. Specifically rfc5766-turn-server which is really old on Trusty. https://launchpad.net/ubuntu/+source/rfc5766-turn-server ...
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1answer
23 views

text based tool for ldap queries

I need a way to do LDAP queries through a text based interface. I use jXplorer on my own machine but that is a graphical client. Btw, I'm running Ubuntu server 14.04. The background: A server in my ...
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1answer
580 views

rtl8723be Realtek Wifi-Card driver not working on Ubuntu 14.04

I installed Ubuntu 14.04 on my new Lenovo G50-70. The wifi works perfectly in windows, however it behaves strangely on Ubuntu. It is slow, doesn't load heavier sites at all, and after a while, ...
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0answers
42 views

Connect OpenVPN server on Ubuntu Guest VM

Setting up OpenVPN server on Ubuntu Server VM and trying to connect to it from HOST Windows 8 but had no luck. There is no connection. Whats wrong? Everything was did with this tut: ...
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0answers
17 views

Unable to type input to serial command interface

I am trying to communicate with a device with a serial command interface. dmesg shows that: [ 2465.467579] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB0 ls -pla /dev/ttyUSB* ...
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0answers
53 views

odroid/ubuntu - getting wlan to start

Im working with an 'odroid' fanless PC. The latest OS attempt on it is the stock Ubuntu 14.04 that comes with it. Have made some progress getting the networking (eth0) started but am having issues ...
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0answers
113 views

Get System Serial Number in Linux Machines [closed]

How Can I get System Serial Numbers in Linux Machines ? i prefer to get this through a non root account and dont want to use external commands such as dmidecode or lhal Update I am working on a ...
3
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1answer
64 views

losetup /dev/loop0 disappears after some time

at the moment I do some tests with loop devices on Linux/Ubuntu. In a small test script I have the following commands: #!/bin/sh rm testfile.x dd if=/dev/zero of=testfile.x bs=1M count=1200 losetup ...
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2answers
56 views

How will apt-get handle my manual installed software?

Suppose the Emacs version in the APT repository is 24.3, I configure && make install my own emacs 24.4. After a long time, the software in the APT repository was updated to 24.5. What would ...
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2answers
73 views

Running ubuntu binary on CentOS with all shared libs installed results in ld SIGSEGV

I'm trying to get a binary compiled on Ubuntu to run on CentOS 7 (both 64bit, one host, the other vm). So far I've copied the binary with all the shared libs. I no longer get the missing library ...
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1answer
65 views

How do I know if I'm in a jail, container, snapshot, etc. environment? [duplicate]

I received a machine (Ubuntu 12.04 server) from a coworker when he left the company. I created my own user as sudo/admin and used the machine for months via SSH. After rebooting for the first time ...
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0answers
48 views

Ubuntu remote desktop user using a key-based login

I have an Ubuntu 14.04 LTS set up and I have a which authenticates using a private key to connect via PuTTY. Is it possible to use remote desktop from windows 7 (xrdp) with key-based login?
2
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0answers
19 views

Why libpam-systemd run interactively on apt upgrade, even when specified force-confdef/force-confold

I upgrade my packages using aptitude, specifying the apt options --force-confdef and --force-confold. This generally works, but the package libpam-systemd (204-5ubuntu20.8, on Ubuntu 14.04) still ...
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1answer
88 views

Ubuntu runuser command?

I am creating a bash script that requires to run commands as a specific user. As a result I am using the command: runuser I have tested this script and it works perfectly in Ubuntu Server 14.10. ...
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1answer
45 views

Creating users with groups in Ubuntu Server? [closed]

Typically when I create a new user in CentOS / Redhat with the command: useradd user The permissions that it is assigned to the user typically works fine. I believe everything is restricted to its ...
3
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1answer
77 views

Ubuntu user disappeared from machine

Unsolved mystery - I was given a coworker's Ubuntu 12.04.1 LTS machine and set up my own (sudo/admin) user on there from the command line. I switched to my user (from his sudo/admin user) and ...
2
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1answer
41 views

number of open files configuration not operational

Addressing an error of Too many open files I was attempting to follow the suggestions here Although /etc/sysctl.conf fs.file-max = 70000 vm.swappiness = 10 and /etc/security/limits.conf nginx ...
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0answers
29 views

rsyslog and netsnmp support for Linux namespaces

I have configured different net namespaces (netns) on my linux machine (Ubuntu) with different routes in each. Now, if I want rsyslog and SNMP traps (netsnmp) to use one of the route from these ...
1
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1answer
33 views

Accidentally deleted /bin/su

I was working in /bin on my Ubuntu system and ended up deleting su via a typing error while trying to do other editing. So now I have no way of swapping back and forth between users and root. I have ...