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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What kind of crash would crashdump fail to capture?

A freshly built machine running Ubuntu 12.10 64bit is hanging under seemingly random conditions. To debug this I've installed linux-crashdump, confirmed that the second kernel is loaded and a ...
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0answers
703 views

Installing 12.04LTS Server on a Fake RAID10

Scenario Install Ubuntu 12.04LTS Server on a RAID10 with boot on a RAID1. 4 - 2Tb SATA Hard Drives 3 Partitions (/boot, /, and swap) boot (256Mb from each disk) setup in RAID1 /dev/md0 partition ...
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0answers
114 views

beagleboard com and HDMI dispaly

I've installed Ubuntu 11.10,lkde and gem on my BB and I connect to it through serial com. when trying GUI application through the com (e.g. gedit) I get "display not found, though a monitor is ...
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2answers
751 views

How to delete a library which is not visible for package manager?

Long time ago I've installed matplotlib which I need to remove. I did it from the source, so if I go to synaptic manager (I use ubuntu) then I don't see matplotlib installed. But I found ...
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3answers
2k views

How to prevent shutdown when an SSH user is logged in?

I'm administrating a networked environment and I had an interesting situation arise yesterday. When a host is required to shutdown by a regular user, it refuses to do so if other users are logged in ...
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1answer
204 views

Package Installation log creation

I have written a script for installing packages on Linux(Ubuntu). So I want to create a log file for installation of packages for troubleshooting if any problem occur during installation.So please ...
2
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1answer
2k views

SSH host key keeps changing

I am trying to set up a web service (using the Play Framework) on an Ubuntu machine on the network. However, I am experiencing intermittent failures connecting to it, not being able to connect to it ...
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2answers
16k views

Changing root password does not change sudo password

I'm trying to change the password that get's asked when doing sudo. I'm in Ubuntu. Doing 'sudo passwd' or 'sudo passwd root' does give me the two new password questions, and it successfully changes ...
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1answer
239 views

Deleted header file /bits/types.h

On compiling a program using gcc, I was getting syntax errors in /sys/types.h. While investigating the problem, I ended up mixing up the /bits/types.h and /sys/types.h and I mistakenly deleted ...
3
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1answer
867 views

Washed out colours with screencast software but not screenshot on Ubuntu (all versions)

I have experimented with screencast software on Ubuntu over a number of LTS versions and using pretty much every software I can get my hands on. I have used VLC, RecordMyDesktop and some others the ...
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1answer
68 views

Why grp:lctrl_lshift_toggle still keeps right keys as switch triggers?

I ran the following command in my terminal: setxkbmap -layout us,ru -option "grp:lctrl_lshift_toggle,ctrl:nocaps" but for some reason, the effect is the same if I specified "grp:ctrl_shift_toggle" ...
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2answers
993 views

How to turn off DELL BIOS beeping through Ubuntu?

I removed my LCD with Inverter, because it was broken. I'm using a Inspiron 4050 with a HDMI or VGA connected at TV, but the BIOS beeps(8times) continuos for ever and ever. There is a way to control ...
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1answer
2k views

ping receives no packets, but tcpdump can see them coming in

I'm migrating an old Ubuntu OpenVZ instance (Jaunty) to a new CentOS 6.3 host (using vzdump/vzrestore). Now networking does not work properly. Facts: It works just fine if a setup a new OpenVZ ...
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1answer
1k views

How to use one distro's live CD to install another distro?

I'm trying to install Mint Linux to a USB stick, but the Mint live CD doesn't fit on a normal CD and I don't have any DVDs available. The Ubuntu live CD does fit on a CD, so I want to use the Ubuntu ...
5
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1answer
7k views

How to execute a shellscript when I plug-in a USB-device

I want to execute a script when I plug in a device in my Linux machine. For example, run xinput on mouse or a backupscript on a certain drive. I have seen a lot of articles on this, most recently ...
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0answers
1k views

xrandr config not loading properly at startup from .xprofile

I'm using xrandr to rescale the resolution on a netbook (Ubuntu 12.10). When I run the following command it works fine: xrandr --output LVDS1 --mode 1024x600 --panning 1280x720 --scale 1.25x1.2 ...
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2answers
885 views

Heartbeat with virtual IP at Ubuntu 12.04

I have installed heartbeat package at both linux devices so that when ever clients request a service they will be arrived to this IP, and client will not know what are the back-end/actual ip addresses ...
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1answer
268 views

kvm guest Network interface no Authenication

i have a kvm host based on ubuntu 10.04 host , and the guest is rhel 5.3 64-bit, on the guest i tried to execute mii-tool eth0 SIOCGMIIREG on eth0 failed: Input/output error SIOCGMIIREG on eth0 ...
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0answers
872 views

Error when trying to install valgrind on Ubuntu 10.04

Having trouble tracking down a solution to the following problem. I am running Ubuntu 10.04. ~$ apt-get install valgrind Reading package lists... Done Reading state information... Done Some ...
6
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2answers
15k views

NFS does not work. mount: wrong fs type, bad option, bad superblock

This is what I got on server: manuel@server ~ $ cat /etc/exports /var/share 192.168.178.20(rw, sync) manuel@server ~ $ cat /etc/hosts.allow portmap: 192.168.178.20 manuel@server /etc $ cat ...
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0answers
600 views

Ubuntu 10.04 kvm Virtual Machine guest network speed slow

i have the following situation, i have a kvm host ubuntu 10.04 LTS 64-bit network host speed is perfectly run , as i am testing network speed using iperf , the speed between any network device and the ...
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0answers
164 views

External HDD read/write permission changing from a cron job

So, I run an overnight python script that runs a backup of our web data in the /var/www directory, then moves the backups to an external HDD in /media. The script in scheduled in the sudo crontab ...
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1answer
397 views

Having trouble executing a compiled C program

I am running an Ubuntu v10.04 through VirtualBox. To test the persistence of files I create in the virtual machine, I wrote a very basic C program. When I shutdown the virtual machine and restart it, ...
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4answers
50k views

How to mount/recover data on a disk that was part of a mdadm raid 1 on another machine?

Some background The disk itself was "worked on" by a friend and is said to be still intact, undamaged and still mountable/recoverable The disk was part of a software raid 1 on Ubuntu 12.04 The other ...
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1answer
264 views

Wireless on my Dell Latitude E5320 doesn't work on Ubuntu but works on Linux Mint. What can I do to make it work?

I have dualboot Ubuntu 12.10 & Linux Mint 14, both are clean install & updated with the latest. My wireless works flawlessly on Linux Mint but it's very unreliable on Ubuntu: every 15~20 ...
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3answers
16k views

How to print the percentage of disk use from `df -hl`

I know that df -hl outputs a list of all my partitions with its size, usage as a percentage, and space available. If I wanted to output just the size and usage as a percentage of sda2 and sda3, for ...
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3answers
335 views

Is there a difference in resource use/requirements between Ubuntu and Debian versions of Linux Mint (under the same DE)?

I intend to use Linux Mint on a RAM/1GB laptop. I'm used with Xfce and LXDE and I see that both Linux Mint 14 Nadia and Linux Mint Debian have Xfce versions. Is there a reason to prefer one to the ...
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3answers
6k views

“Unable to resolve hostname” - how to cleanly change hostname without rebooting

At work, I work on a small website using Ubuntu servers hosted on Amazon EC2 instances. We have two webservers, and at any given time one of them is 'live' and one is 'testing', but when we've got our ...
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0answers
64 views

Boot disk unavailable

Background I've got one 32GB SSD that I have Ubuntu 12.10 installed on (this drive is encrypted), and two 1.5TB drives that will serve as storage and backup respectively. I have formated both drives ...
5
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2answers
32k views

Suddenly, I Can't login with correct password (greeter & tty)

This might be a duplicate of other password related questions but it's somehow eccentric. I have 3 accounts in my Ubuntu 12.10 system (one standard and two administrators). One of the administrator ...
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2answers
66 views

The dependency isn't installed

I'm testing my .deb package and cannot find out why it doesn't install the dependencies: The control file's Depends line is: Depends: zend-grid-module, postgresql-8.4, ${shlibs:Depends}, ...
4
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1answer
4k views

Upgrade matplotlib to 1.2 or 1.3

I am trying to upgrade my python matplotlib but for some reason I can't get it to upgrade. I originally installed matplotlib with: apt-get install python-matplotlib which was fine. However it ...
1
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1answer
521 views

Graphics fuzzy in Ubuntu 12.10

I am new to Linux and Ubuntu. Having just installed 12.10 I notice that I get fuzzy text and icons that change when I move my mouse over them. See picture below as an example. What could be wrong and ...
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3answers
1k views

Linux Permissions vsftpd

I have mybb installed and running in /var/www/forums. I have two users part of the www group, logan and www-data. I have the recursive permissions of forums directory set to: chmod -R 755 forums ...
3
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0answers
239 views

Why message queues are not being used for any system level applications in Ubuntu OS?

In my Linux machine, when i run 'ipcs' command, I have the below information listed srinivas@srinivas-G41MT-S2:~$ ipcs -a ------ Shared Memory Segments -------- key shmid owner ...
6
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3answers
2k views

Change default search name

My Ubuntu12 server VM is receiving its IP address from an DHCP server (actually my WLAN router called Fritz Box). Hence all domain names are resolved to machinename.fritz.box. The reason seems to be ...
2
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2answers
777 views

Why does my laptop suspend twice/thrice?

The awesome WM doesn't suspend automatically when closing the lid, so I followed some instructions to get it working. I simply added a file /etc/acpi/local/lid.sh.post with the following contents: ...
1
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1answer
607 views

bash autocomplete not working, does not 'complete'

I my bashrc. I have a bash completion for the command scp implemented as follows function _scp_complete { COMPREPLY="" COMPREPLY+=( $(cat ~/.ssh_complete ) ) COMPREPLY+=( $( find . ! -name . ...
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3answers
429 views

Lock folder when running cron

I am setting up my first cron on a Ubuntu Desktop system. I was curious to know if there is a way to lock a folder before a cron is ran and how to set it up? I am following this article. I am just ...
1
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2answers
103 views

How to stop apt from uninstalling the packages while updating

I using apt in terminal to install an update. When i used apt-get -f install it showed 0 upgraded, 7 newly installed, 428 to remove and 3 not upgraded. 4 not fully installed or removed. Need to get ...
6
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1answer
3k views

Become operator on all channels ircd-hybrid

I have a problem with my ircd-hybrid server. I can only make myself operator in the status tab but not when I join channels. There is my operator tag in ircd.conf: operator { /* name: the name ...
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4answers
10k views

How to truely install a tar.gz file on Linux - how to manage manually-installed (or standalone) applications?

I see all these links explaining packages and .debs... I know that... and there are many kludges to get tar.gz files working (eg: update-alternatives for Java or manually dropping the file in ...
4
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2answers
1k views

What happens when a hard drive fills up?

What happens when a hard drive gets full with Linux running? Does it lock the system? Or something else, or nothing happens? I am using Ubuntu Linux.
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3answers
5k views

What would be the RHEL package corresponding to build-essential in Ubuntu?

I know how to list available packages from the repos and so on, but how can I find a list that matches up equivalent meta-packages, such as the build-essential. Is there such a thing and if not what ...
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1answer
955 views

How should I partition my hard drive?

Xubuntu 12.10 XFCE with Greybird theme Hello, this is my GParted screenshot: Could anyone please give my any advice on how to make changes to have more space available for use in Linux? Let's ...
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1answer
1k views

Low display resolution Ubuntu Gnome remix 12.10

I'm running Ubuntu Gnome remix 12.10 and it can't recognize my display. My HW is: Intel i3 3225 with HD 4000 onboard / is on a OCZ Vertex 4 SSD display is an old IBM Thinkvision with vga connector ...
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5answers
8k views

Ubuntu 12.10 Fan overspeeding

I have installed Ubuntu 12.10 leaving Win 7 licensed version. But again as usual I need to fix so many issues. This time fan is generating lots of noise. It looks it is running at max speed. My ...
5
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2answers
8k views

How to configure xorg.conf for widescreen VNC on headless Linux/Ubuntu?

I have a Ubuntu 12.10 Box configured to run headless. I've managed to boot X headless by a lot of trial and error but I still have a glitch: When booting using the monitor, it all works ok, widescreen ...
3
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1answer
441 views

How to figure out GRUB2's menu output

I have just updated a remote machine which is running Ubuntu Server 12.04. I have only access through SSH and now it's asking for a reboot. I'm guessing a new kernel was installed. I need to make it ...
18
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6answers
19k views

How can I switch between different audio output hardware using the shell?

I use my laptop with an external monitor which has speakers. When the monitor is attached through HDMI I can switch (using the GUI: Sound Setting --> Hardware) between the normal laptop audio output ...