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 know file system of any medium like hard disk, CD/DVD, flash drive? [duplicate]

Is there any command or any way to know what file system is there on a medium like hard disk or CD/DVD or flash drive etc. From GUI gparted one can know the type on hard disks/pen drive but not of ...
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1answer
862 views

Since Ubuntu persistent USB crashed, it fails to boot with black screen pre-login, what to do?

I'm using a persistent live USB version of Ubuntu 13.04. Recently it crashed while I was using it. When I restarted I couldn't get past the Ubuntu logo with the sequentially flashing dots anymore. ...
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1answer
120 views

Why does apt-get remove only a few kB?

I installed nginx (sudo apt-get install nginx) and then removed it with sudo apt-get remove nginx. I to need ensure that the application is uninstalled and cannot run. (I'm still able to run service ...
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1answer
7k views

How to properly automatically/manually rotate log files for production Rails App

I am taking over administration for a server which has a custom made 3rd party Rails app. The app developer informed me that the ruby log files are getting large and pointed me to the following link: ...
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3answers
987 views

Fastest way to convert a large amount of FLACs to MP3s

I'm looking for something that can take advantage of my GPU or at the very least, multiple cores of my CPU to convert a few terabytes of FLAC to mp3 (VBR v0) very quickly while preserving all of the ...
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2answers
752 views

Lenovo ThinkPad E430 - 32 or 64 bit?

I just bought a Lenovo Thinkpad E430 and want to install Ubuntu in it. But I don't know whether I should install 32 bit or 64 bit. Its core i5 3rd generation and 6gb ram (2 + 4)
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1answer
160 views

How can I forcibly remove a package from Ubuntu by hand?

I posted this on ServerFault and got some helpful-looking questions, but no answer in terms of what can I do. What, on a low level, can I do to completely exorcise a package that is jamming aptitude ...
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3answers
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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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2answers
736 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: ...
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1answer
928 views

Installed programs not appearing at the Dash Home?

Some software that I install on my Ubuntu doesn't appear on the Dash Home menu. For example, I installed Komodo Edit (thru a .sh file). If I want to run this program, I have to go to the directory ...
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1answer
13k views

Missing 32 bit library on a 64 bit Linux install

I am trying to figure out why Eclipse is complaining about being unable to find a library. I've managed to reproduce/reduce the java problem to: $ ldd ...
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2answers
8k views

Watchdog script to keep an application running

I currently use an application called MxEasy on my linux servers to display video from a couple of IP cameras. The software is rather buggy and crashes occasionally. I've wrote a script that checks to ...
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2answers
520 views

Finding root password

I installed a Ubuntu and it only has a user. I can login to the system without login. It doesn't ask me for un/pwd. but when I am in, and I want to run some commands as root (sudo), it ask for ...
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2answers
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Is my USB hard disk dead?

My USB hard disk started to make some beep type of sound and then stopped working. I have to replug the hard disk to make it work again. After some time same sound is heard and again it stops ...
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2answers
3k views

What do mkfs.xfs and modprobe do when mounting an Amazon EBS instance?

I'm looking through this guide for how to add an EBS volume to an Amazon EC2 instance, and I've found this little part of instructions hard to follow: Create an XFS file system on the EBS volume ...
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2answers
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How to execute script on logging out?

I'm reading The Unix Programming Environment. There is an exercise question to print how much CPU time you have consumed when you log off by editing .profile. I tried with this trap 'times' 0 1 2 15 ...
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2answers
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Run Ubuntu 10.04 LTS with Apache2 SSL with passphrase

I am setting up a Virtual Machine with Ubuntu 10.04 Lucid Lynx Server. I have been reading the section on setting up Apache with an SSL certificate within the book : "Beginning Ubuntu LTS Server ...
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3answers
1k views

Why does the adduser command behave surprisingly?

I see various examples of how to add a user on Ubuntu server I have Ubuntu 10.04.2 LTS I was logged in as root and, when running adduser, my SSH command line asked me for both a 'new password' AND ...
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2answers
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How to change dm_crypt aes/256 LVM password after install?

I installed Fedora 14 & Ubuntu 10.04 LTS on my PC. I used dm_crypt/LVM with aes256 in both installs (2 VolumeGroups, each encrypted, so there is 2 separated & encrypted linux distro on this ...
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1answer
281 views

Which distro should I switch to?

I've been an Ubuntu user for quite a few years now. However, with the recent release of Gnome 3, and with Ubuntu not going to include it by default, instead including its own customizations (such as ...
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2answers
2k views

Google Chrome Monospace Fonts Hard to Read

In Google Chrome on Ubuntu, I find it hard to read code. How can I change the font settings to make it easier to read?
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5answers
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How do I resize a partition in Ubuntu linux without losing data?

I ran out of space in my on the drive only to find that there was another unformatted partition in the system that is available. I now want to resize the current partition to take in the empty ...
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1answer
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Install MySQL from Bash Script

I'm coding a bash script to automate the process of deploying VPS servers but I'm having some trouble while trying to install MySQL from either aptitude/apt-get or yum, this is what I have so far: if ...
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1answer
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Can't reach DNS through wireless router

I've got a Ubuntu 10.04 laptop, and recently it's had some odd networking problems. It's on the home wireless router, supplied by the phone company, and has no problem talking to anything on the ...
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1answer
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Packages kept back during apt-get upgrade

I'm running Lubuntu 14.04.3 LTS amd64 version. I did apt-get update and apt-get upgrade which showed few packages have been kept back. These are mainly kernel related packages namely, ...
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1answer
115 views

Editing multiple files simultaneously with vim/gedit

I'm trying to save some work by editing multiple files with the same name located in different directories: $ mkdir -p directory_{0..10}/results How may I create files with the same name in all ...
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2answers
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How do I resolve package dependencies for a different target system?

(TL;DR: how do I determine the minimum set of packages to install, given an initial state and desired package list?) I'm creating an Ubuntu installer ISO for systems without access to distribution ...
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3answers
1k views

nginx logrotate error on cron job

I'm running Ubuntu 14.04 LTS and nginx on a Digital Ocean VPS and occasionally receive these emails about a failed cron job: Subject Cron test -x /usr/sbin/anacron || ( cd / && run-parts ...
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2answers
798 views

How do I transfer installed packages and settings from one distro to another?

I've been exploring learning and about the Linux system via VirtualBox for a few month's and decided that I want to make it my main OS and install it on my hard-drive. I have a number of files, ...
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1answer
63 views

What happens step by step when using “rm -rf directory”? [duplicate]

Let's assume that I have 150 GB of data in a directory and I have accidentally run this command for a directory. Suddenly I realised, I should not put "/" in the beginning of directory and I ...
2
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1answer
147 views

What are the deb files for installing a kernel for?

When installing a kernel in Ubuntu(e.g. http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-vivid/), what are the files for respectively: linux-headers-4.0.0-xxx_all.deb ...
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1answer
19k 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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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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1answer
4k views

Resize of VirtualBox Screen?

I've recently installed the Guest Additions CD on my windows VirtualBox running Ubuntu 14.04. It was working great for a while - screen resized automatically, etc. However, when I turned off my host ...
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3answers
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'ImportError: No module named _struct' error when managing packages

I'm running elementary OS 0.2 (based on Ubuntu 12.04) and starting today I'm seeing a weird error when attempting to install/upgrade packages. Just now for example I did a: sudo apt-get update ...
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1answer
218 views

Interface Priority in the Face of VPN

I have a few interfaces: wlan0, eth0, lo, and sometimes tun0. When I connect to the Juniper VPN, creating a tun0 interface, my existing connections on other interfaces (perhaps with the exception of ...
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2answers
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Is it possible to obtain OS X versions of Unix tools on modern Linux distributions (like Ubuntu or RedHat)?

I have observed that there are often subtle and often annoying differences between the default versions of certain command line tools like paste and sed on modern distributions of Linux versus OSX. ...
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1answer
165 views

Replacement of using terminal

Is there a way I can use Putty and connect it to my machine in replacement of terminal on my laptop? I am currently using ubuntu but I like some of the features that putty has over using the terminal. ...
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1answer
3k views

Why beep does not work in Ubuntu?

I've tried the below shell, but nothing happened. #! /bin/sh beep -f 500 -l 700 beep -f 480 -l 400 beep -f 470 -l 250 beep -f 530 -l 300 -D 100 beep -f 500 -l 300 -D 100 beep -f 500 -l 300 ...
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1answer
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How to upgrade OpenSSL to 1.0.1h

I'm currently running Ubuntu 13.10 and my OpenSSL version is 1.0.1e. As per latest security warning, I'd like to upgrade it to 1.0.1h. I've tried apt-get upgrade openssl (don't want to upgrade ...
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1answer
142 views

Remove an IPTable Rule

I'm having troubles removing this ipables rule in Ubuntu: $ iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 3128 I've tried using the -D attribute but with no success. How can ...
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2answers
188 views

Ubuntu kernel source code package

Can somebody explain me the difference between the following files: drwxr-xr-x 28 root root 4096 Apr 22 12:04 linux-lts-raring-3.8.0 -rw-r--r-- 1 root root 15209788 Mar 14 03:38 ...
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3answers
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Registering Ubuntu Client With Spacewalk

Right now I'm just testing the process for some desktop machines I'll be managing so I have a fresh install of Ubuntu 12.04.04 LTS. We have a non-satellite spacewalk server that I'd like to have ...
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1answer
1k views

How do I determine where DNS requests fail in the TCP stack?

I have the networking setup described here: Why is this static route not taking effect? Currently, I can ping my DNS server but all DNS requests fail: ~$ ping 130.35.249.52 PING 130.35.249.52 ...
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2answers
80 views

git diff - listen for key press

I want to run the following commands: git diff git commit git commit will open the default editor to edit the commit message. But if the difference if not too long it will close immediately. How ...
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2answers
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Best solution advice for backup to NAS over WAN

What is the best solution for daily backup of Linux folder to NAS server over WAN? Here is the situation: My customer has expressed a wish that source code for his project must be backed up every day ...
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1answer
51 views

'which' reports one thing, actual command is another [duplicate]

I am running Ubuntu 12.04, which came with Cmake v 2.8.7. I had need for a more current CMake, so I downloaded the source for 12.8.12.1, built, and installed it per directions. The last step, make ...
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3answers
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How can I find the amount of memory consumed by a process?

How can I find the amount of main memory consumed by a process using ps aux? I have a process which runs for half an hour. Is it possible to find the maximum amount of main memory consumed by it ...
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1answer
2k views

How to safely give non-root access to lib so that Catalyst hardware acceleration can function?

I've installed AMD Catalyst 13.8 BETA2 by following these directions. It works fine on the administrative user it was setup with, but a non-admin user gets the black screen on login. Non-admin user ...
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2answers
148 views

Backing up a partition: doesn't reflect the status properly

With an intent to check how backing up files/filesystems works, I created 3 part itions sda9, sda10 and sda11. Please see the structure below. (Please ignore sda10 for now as I have already run ...