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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How to pipe md5 hash result in shell

I am looking for a simple way to pipe the result of md5sum into another command. Something like this: $echo -n 'test' | md5sum | ... My problem is that md5sum outputs not only the hash of the ...
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6answers
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Negatives/downsides of Ubuntu's no-root sudo setup

By default, Ubuntu does not create a root account that the user can login to. Instead users use sudo when they need to perform actions that require administrative access. Obviously, the people at ...
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2answers
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Does a bad sector indicate a failing disk?

My Ubuntu 13.10 system has been performing very poorly over the last day or so. Looking at the kernel logs, it appears that the <1yr old 3TB SATA disk is having issues with a particular sector: ...
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3answers
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How can I install perldoc on Ubuntu?

Ubuntu 10.10 comes with Perl 5.10.1 pre-installed, but strangely enough perldoc isn't part of the package. $ perldoc You need to install the perl-doc package to use this program. How can I make ...
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3answers
880 views

Harddrive I/O per Pid

is there any way to see the disk I/O per pid/process ? Monitorix shows me the following and correct me if I´m wrong, but it looks like that the harddrive is slowing down the whole system: UPDATE #1 ...
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4answers
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tail -f, but with line numbers

I'm trying to see how many times foo bar appears in /var/log/foo.log within an arbitrary amount of time on a remote server, but nothing that I've tried so far has worked. I've already got a timer ...
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1answer
951 views

Why root's default shell is configured differently with other normal user account's default shell?

As I know, root's default shell is configured csh and normal user's default shell is sh in FreeBSD. And in Ubuntu, root is dash, normal user is bash. (refer: What's the Ubuntu's default shell?) Why ...
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2answers
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How do I find the process generating a lot of network traffic?

My machine is generating a lot of network traffic, all from the same source port, with many different destinations (found this out by running iftop -P, and from my router's logs). How do I find the ...
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4answers
9k views

Switch Fn key state

I have this issue with Lenovo Thinkcentre Edge. Its keyboard has Fn key, which acts in my Ubuntu (with Fluxbox) as if it is always "active/pressed". I can't use standard F1-F12 keys unless I hold ...
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5answers
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Dual monitors and panels

I have a question with regard to a multiple monitor setup. I'm currently primarily a Windows user, but I've been running Ubuntu in dual boot to get a feel for it. The one thing I find lacking that ...
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4answers
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How do I migrate configuration between computers with different hardware?

I want to migrate the configuration of an Ubuntu desktop to a new box with different hardware. What is the easiest way to do this? /etc/ contains machine and hardware specific settings so I can't just ...
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2answers
780 views

Is it possible to install a linux desktop environment from a live cd?

My question is about Linux in general but lets suppose my ubuntu isn't working property, booting in tty or whatever. I have no internet connection but I have ubuntu live cd. Is it possible to ...
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5answers
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invalid SSL_version specified at /usr/share/perl5/IO/Socket/SSL.pm line 332

Since I upgraded my PC from (k)ubuntu 12.04 to 12.10 I receive this error message when trying to send an email using sendemail. Installing an older version of IO::Socket::SSL is not an option. I ...
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1answer
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wubi pros and cons

Do you have experience using Wubi and if so, what are the major pros and cons ? I am of course particularly interested in potential problems.
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2answers
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Removed apt-get from Ubuntu

Well my fingers did manage to do sudo apt-get remove libstdc++6 and write, yes. That removed alot of system files. Is there any way to bring it up working again? I have connected to terminal, and wget ...
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1answer
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Where did /usr/lib64 go and what is /usr/lib/x86_64-linux-gnu?

I have two Ubuntu-x86_64 systems. One is version 10.04, the other 12.04 and there is a difference in the structure of the lib directories. This doesn't surprise me, but I'm curious if anyone knows ...
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2answers
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Are driver modules loaded and unloaded automatically?

On Ubuntu 14.04, I found that when I don't plug in my external wireless adapter, its module rt2800usb is still shown in lsmod. when does automatically loading a driver module happen? Is it when ...
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1answer
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How do I use colors in the MOTD?

I edited the default /etc/update-motd.d/00-header, adding some color to make it easier to read: printf "Welcome to \e[1;34m%s\e[0m \e[2m(%s %s %s)\e[0m\n" "$DISTRIB_DESCRIPTION" "$(uname -o)" ...
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2answers
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Evince fails to start because it cannot read .Xauthority

I'm logged in remotely over SSH with X forwarding to a machine running Ubuntu 10.04 (lucid). Most X11 applications (e.g. xterm, gnome-terminal) work fine. But Evince does not start. It seems unable to ...
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2answers
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Add Apache to Ubuntu's startup

I'm currently learning the Linux environment, and decided to manually install the Apache server. For educational purposes, I've compiled it into: /server/apache The http.conf location is configured ...
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2answers
339 views

Can I get infected in this case if I run a live cd?

I recently got rid of a nasty trojan on Windows and want to migrate to Linux(Ubuntu). I want to run a Live CD so that I can format an SD card to put my brand new firmware on my router and format the ...
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2answers
55k views

How to fix boot into initramfs prompt and “mount: can't read '/etc/fstab': No such file or directory” and “No init found”?

Installing a new system using a GPT partitioned disk dedicated to a single partition, ext4 formatted, extlinux (version 4.05) as bootloader, Ubuntu Core version 13.10 amd64 as rootfs, and Ubuntu ...
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1answer
621 views

GPU computing without X?

I am attempting to run GPU computation software on Ubuntu Server 12.04 without X since this box is going to be a dedicated computation machine. However the last requirement "Without X" is proving to ...
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2answers
1k views

Fixing CTRL-* in vim under GNU screen

When running vim under GNU screen, I'm finding that combinations of CTRL with the arrow and Pg* keys don't work as expected. I'm using the Ubuntu 10.10 vim-gnome package. On a different machine, ...
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4answers
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When does chmod fail?

Under what circumstances will chmod fail? I looked at the man page but it only specifies usage and doesn't go into details about what circumstances it won't work in. I'd assume chmod will work if: ...
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1answer
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How to launch an application with default “terminal emulator” on Ubuntu?

I wanted to execute some command in terminal emulator, like Konsole, but I need to make this cross-desktop. Is there some command like xdg-open, but for getting the default terminal emulator? I'm ...
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1answer
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Can I use and install Ubuntu packages in Debian?

I'm looking to install Linux Mint on my main work computer. Presently, I'm running Ubuntu 10.04 on it after upgrading from 9.10 (both 64bit). Previously, I have always backed up and formatted my hard ...
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2answers
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udev rule for assigning known symlinks for identical usb serial devices

I have two (and possibly in the future, more) USB serial devices which are identical (down to the serial number, unfortunately) - they're actually BTC miners. Currently they end up as ttyUSBX where X ...
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3answers
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How do I find out why cron is not running my jobs?

I'm using Ubuntu 14.04, and the cron daemon is running: # ps ax | grep cron 822 ? Ss 0:00 cron but it is not executing any jobs. I was previously getting entries in /var/log/syslog such ...
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3answers
16k views

Proper way of changing username in Ubuntu or any linux

I am using Ubuntu 12.04 and made some customization. I will also make it a new iso which is customized ubuntu. What I want to ask is how can I change my username. There are plenty much configuration ...
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1answer
2k views

Using setkeycodes to map pressed and released to different “keys”

I have a keyboard that has a scroll wheel, but it doesn't work on Ubuntu and xev command doesn't show anything when moving it. But with the dmesg command I found this: When moving the scroll wheel ...
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2answers
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Cisco-like command Line Interface

I'm looking for a way to implement a fairly basic Cisco like command line interface on my Ubuntu server appliance (12.04 in particular). I've come across the following project: CLISH however, ...
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2answers
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Fritz WLAN USB stick - Xlib/Xfree86 dev packages for installing Wine

I have installed Ubuntu 10.4 and want to install the driver for my Fritz WLAN USB stick according to http://wiki.ubuntuusers.de/fritz!wlan_usb_stick (German site... sorry). Now I am trying to install ...
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2answers
412 views

Cursor is huge on Ubuntu due to high resolution monitor

So I have a 4k display, and for some reason Ubuntu decides that it's a good idea to give me a huge cursor instead of something normal. I don't have any DPI settings on the 4k monitor, and I don't want ...
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3answers
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“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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1answer
378 views

Installing USR 5422 on Ubuntu 12.04

I am a newbie to Linux. I was trying to set up the USR5422 USB adapter. It worked fine for the first time, but since then it freezes the computer most of the time. What commands can I fire to see ...
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2answers
2k views

autofs with sshfs not working anymore [closed]

I just upgraded from Ubuntu 12.04 to 12.10. Before that I backed up my autofs config which worked fine. I appended the line from my old /etc/auto.master to the new one: +dir:/etc/auto.master.d ...
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5answers
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Unable to connect to a wifi network with an SSID containing diacritics

My current WiFi network (and i'm writing this with the help of Windows -.- ) has a diacritic in it's SSID: "ö". If changing the SSID is not an option, how to connect to such a network? This does not ...
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3answers
694 views

Is it possible to execute scripts in BIND based on lookup

Is it possible, to set up BIND as DNS server on my local network, and make execute scripts when it gets a lookup? I would like to execute a Python or Bash script, based on the incoming DNS lookup, ...
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2answers
752 views

No sound when attached to docking station

I have been using Linux and Ubuntu only since the last two months on my (2006) Sony Vaio VGN A617S laptop which is going pretty well on Ubuntu 10.10. When installing Ubuntu audio did get installed ...
7
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1answer
61 views

what's difference between src version 3.* and 3.*-generic

In my local Linux/Ubuntu, I have two directories for Linux src /usr/src/linux-3.16.0 /usr/src/linux-3.16.0-generic I found the code in 3.16.0 is much more than that in 3.16.0-generic. I am ...
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1answer
378 views

Low battery freezes laptop [closed]

I have a laptop Lenovo G575. MS Windows works without any problems on it, but with Linux, it freezes during login or up to 10 minutes after power on. I have tried Ubuntu, Fedora 15 and 16, Fedora 16 ...
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5answers
2k views

How do you free up resources in Ubuntu?

What steps do you take to make a vanilla Ubuntu system run faster and use less memory? I'm using Ubuntu as the OS for my general purpose PC, but it's on slightly older hardware and I want to get as ...
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3answers
14k views

Automating textual input from a bash script without using EOF

I'm running Ubuntu Linux. Suppose there is a program called myprogram. This program prompts the user for input; specifically, the user must type an integer when prompted and press Enter. I would ...
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2answers
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Recovering from 'grub rescue>' crash [closed]

Originally posted to AskUbuntu.com ... AskUbuntu has adopted a policy of closing questions about EOL (End Of Life) versions. There's a vocal contingent to remove them as well. To prevent ...
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2answers
27k views

Where does postfix store email?

I can't find any documentation on how postfix stores email. Where is it stored, and in what format? I'm using Ubuntu server 11
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2answers
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What is the rationale behind using non-numeric package component for the version?

In ubuntu (and not only in ubuntu) default repository you could see a package version like 2.2.14-5ubuntu8.12. Why do the maintainers give such a weird version in the central package repository? ...
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3answers
518 views

Effect of compiling from source on already installed applications

I use Ubuntu 12.04. Say I have installed package x from the repository (with all its dependencies) at version 1.7 but I need some functionality that is only available in version 1.8, so I download the ...
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6answers
33k views

How to transfer files from Windows to Ubuntu on Virtualbox?

How should I transfer files from Windows to Ubuntu installed on Virtualbox? When I plugged in a USB, it only pops up in Windows. How can I see it in Ubuntu?
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3answers
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Command line join of password protected wireless networks in Ubuntu, Arch Linux, or other distros?

Is there a way to join a password protected wireless network via the command line in installations of Ubuntu or Arch Linux with no desktop environment or any GUI installed? Also, could this be done ...