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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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
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
615 views

My Ubuntu 14.04 LTS doesn't have sound

I installed Ubuntu 14.04 on VMware workstation version 10.0.0 on my Windows 7 machine. After installing I figured out that it doesn't have any sound so I checked the sound settings. All items seem to ...
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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
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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2answers
154 views

Shell: How to uninstall all related packages to a specific one? / Ubuntu

Recently I asked to my hosting provider to reload the OS to Ubuntu 12.04 64 bit minimal assuming minimal would have the minimum required packages installed, but I realized that mysql was installed so, ...
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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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4answers
33k views

mount.nfs: access denied by server while mounting on Ubuntu machines?

I am a linux newbie and I have a very basic question. I have three machines in production - machineA 10.66.136.129 machineB 10.66.138.181 machineC 10.66.138.183 and all those machines ...
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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 ...
4
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1answer
661 views

Powertop doesn't display Power est. column

When I run powertop, it doesn't display the "Power Est." column that shows the estimated power consumption in Watts of each row. It should look like in the screen capture here: MacBook Pro Retina: ...
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1answer
2k views

Linker error: /usr/bin/ld: cannot find -lgcc_s

I am trying to compile symlinks (tar.gz-file), which is a very small tool with one line for compilation: gcc -Wall -Wstrict-prototypes -O2 -N -s -o symlinks symlinks.c which gives the error .... ...
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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 ...
2
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1answer
149 views

A window asking me to enter my ssh passphrase is popping up randomly. Why?

I'm on Ubuntu 14.04. For a few weeks now a small window keeps popping up randomly, grabbing my keyboard and asking me to enter the passphrase for my ssh key. The Window's title says "OpenSSH", and it ...
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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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 ...
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4answers
5k views

/etc/rc.d vs /etc/init.d

Is ubuntu's /etc/init.d directory exactly equivalent (functionally) to what I presume to be the more standard /etc/rc.d/ (at least on arch)? Is there any particular reason canonical used init.d ...
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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 ...
1
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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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3answers
17k views

How can I update to a newer version of Git using apt-get?

I've just set up a new machine with Ubuntu Oneiric 11.10 and then run apt-get update apt-get upgrade apt-get install git Now if I run git --version it tells me I have git version 1.7.5.4 but on my ...
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1answer
776 views

org.eclipse.swt.SWTError: No more handles [gtk_init_check() failed] while running spoon.sh in ubuntu

When I am running spoon.sh file in Ubuntu I am getting the following error: [santosh@sbx data-integration]$ ./spoon.sh /home/decathlon/Pentaho-5.0.1/data-integration org.eclipse.swt.SWTError: No more ...
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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 ...
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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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3answers
560 views

Linux installation stops working after a few reboots

I'm trying to set up a dualboot Win8/Linux on my HP tablet (touchsmart tm2-1050ez). However, when I'm finished setting it all up, after a few more reboots, I'm not able to boot to Linux anymore, as I ...
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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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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 ...
3
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1answer
404 views

“Live” Processor hang under Ubuntu 11.10, how to diagnose/fix?

We recently upgraded to Ubuntu 11.10 on a virtual server. Since the upgrade, the server will periodically "hang" with processor use at zero (according to monitoring). Monit is still running and ...
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 ...
4
votes
2answers
708 views

How to fix frequent crashes of openshot?

I have been using the openshot video editing software for some time on Ubuntu 13.10, which does not run stable for me. I would like to know if I can do something to stabilize it, so I can actually use ...
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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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1answer
99 views

Startup script with LSB headers not working correctly (dependency problem)?

I am creating a startup script for my Ubuntu 14.04.1 LTS server. The script need to be run after the Rabbit MQ server. The Rabbit MQ startup script says it provides "rabbitmq-server". So I put this ...
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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
470 views

Ubuntu sound not working after sleep/suspend

Whenever I sleep my laptop I mean if I down the flap sound doesn't work, every time i have to restart my laptop for sound to make working. Fo instance right now sound is not working(since I closed ...
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2answers
1k views

Send command to detached screen and get the output

I've been searching to find a way to send a command to a detached screen session. So far, so good. This is what I've come up with: $ screen -S test -p 0 -X stuff 'command\n' This command works as ...
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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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3answers
11k views

GRUB-EFI installation fails while installing Kali Linux in external hard disk

I was trying to install Kali Linux from a live USB to an 1TB external hard disk. At first I was unable to boot the live USB with my H2O Insyde BIOS. Then I converted my pen drive partition table to ...
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1answer
2k views

Keyboard layout changed. How and why?

Yesterday, I upgraded my kernel (to 3.5.0-19-generic), rebooted, and had to reinstall my video drivers to get full resolution. (After upgrading the kernel, the resolution always goes to 640x480, until ...
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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
529 views

uploaded file via filezilla to proftp server(on ubuntu 14.04 lts) but reported 550 error

uploaded file via filezilla to proftp server(on ubuntu 14.04 lts) but reported 550 error 550 download.html: Permission denied Error: Critical file transfer error I try to set the directory to ...
3
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2answers
907 views

Can't get lm-sensors to ouput correctly or load ATI Radeon temp and fan

I am new to Linux and having minor issues. I followed this guide initially, but did not receive the proper output, and it did not show my ATI Radeon HD 5000 temperature or fan speed. Then I used this ...
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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.
1
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1answer
418 views

i3-wm not resizing screen resolution on login

I'm using Parallels for the Mac, but this may be relevant to other VMs too. Using Ubuntu 14.04, when I login using Unity it resizes the screen and uses all available screens (2 in my case), perfect. ...
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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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2answers
6k views

Problem Windows 8.1 Ubuntu 14.04 dual boot

I installed Ubuntu 14.04 on a computer that has Windows 8.1 preinstalled, following the next link http://itsfoss.com/install-ubuntu-1404-dual-boot-mode-windows-8-81-uefi/ Now I can not dual boot. ...
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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
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 ...
1
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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 ...
2
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2answers
6k views

Booting Ubuntu from usb on a Mac

I have a Macbook pro (late 2009) running OSX 10.6.8. I want to partition a flash drive and install my Ubuntu iso image onto it. Then I want to boot up from it by (restarting my computer and) holding ...