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285
votes
9answers
654k views

What does “sudo apt-get update” do?

I am wondering what sudo apt-get update does? What does it update?
17
votes
4answers
218k views

Grub rescue problem after deleting Ubuntu partition!

After I deleted Ubuntu partition, I rebooted my computer and got grub rescue problem. What I have tried so far is finding the right partition of ubuntu from grub rescue command by ls command. It ...
644
votes
23answers
596k views

How can PPAs be removed?

I've added many PPAs using the add-apt-repository command. Is there a simple way to remove these PPAs? I've checked in /etc/apt/sources.list for the appropriate deb lines but they aren't there. This ...
792
95
votes
10answers
228k views

Mcrypt extension is missing in 14.04 server for mysql

The php mcrypt extension on ubuntu 14.04 shows that it is installed properly, but phpmyadmin says: The mcrypt extension is missing. Please check your PHP configuration. My current php config is ...
193
votes
6answers
228k views

How can I update my nodeJS to the latest version?

I have installed nodeJS on Ubuntu with following code sudo apt-get install nodejs Since I am a new user for ubuntu I also ran this code too sudo apt-get install npm Now when I type nodejs --...
789
61
votes
4answers
416k views

How to enable ssh root access on Ubuntu 14.04

I´d like to enable the ssh root access on Ubuntu 14.04. Editing the /etc/ssh_config (PermitRootLogin yes) didn't affect anything.
375
163
votes
11answers
382k views

How to install OpenJDK 8 on 14.04 LTS?

As of 2016-04-23 Ubuntu 16.04 has ben released, with both OpenJDK 8 and 9 in the official repositories. I would recommend upgrading to that. As of 2016-01-11 OpenJDK 8 is still not available in an ...
308
votes
13answers
716k views

How do I upgrade to a newer version of Ubuntu?

What are the different ways I can use to upgrade Ubuntu from one release to another?
85
votes
4answers
362k views

How do I install python 2.7.2 on Ubuntu?

I want to install python 2.7.2.tgz on Ubuntu, downloaded from http://python.org/download/. Is this a correct way to install : ./configure make make install If not , how can I do that?
799
44
votes
3answers
191k views

How can I dual-boot Windows 10 and Ubuntu on a UEFI HP notebook?

I've got an HP Pavilion Touchsmart notebook that came with Windows 8. I've upgraded to 8.1, and now I want to dual-boot an Ubuntu distribution with Windows 10. When dual-booting with Windows 8.1, the ...
403
votes
9answers
374k views

How do I determine the total size of a directory (folder) from the command line?

Is there a simple command to display the total aggregate size (disk usage) of all files in a directory (folder)? I have tried these, and they don't do what I want: ls -l, which only displays the ...
354
votes
5answers
690k views

Where is the cron / crontab log?

I want to verify if my cron job is executing and what time. I believe there is a log for my sudo crontab -e jobs, but where? I searched google and it I found references to look in /var/log (...
242
votes
10answers
331k views

What is the difference between a hard link and a symbolic link?

As the title says, I would like to know the difference between a hard link and a soft link created by the command ln. The command man ln does provide information, but does not sufficiently answer my ...
112
votes
7answers
362k views

Complete Installation Guide for Android SDK / ADT Bundle on Ubuntu

What all needs to be done to install Android SDK / ADT Bundle on Ubuntu? Each of the steps in the answer was found on some different forum as I encountered obstacles getting started with my Android ...
30
votes
7answers
339k views

How do I install iTunes on Ubuntu?

I've tried different ways to install iTunes, but to no avail. I tried with Wine, but it didn't work. Is it possible to have iTunes on Ubuntu?
535
438
votes
16answers
649k views

How to add a directory to my path?

How do I add a directory to my $PATH in Ubuntu and make the changes permanent?
332
votes
14answers
274k views

How do I free up more space in /boot?

My /boot partition is nearly full and I get a warning every time I reboot my system. I already deleted old kernel packages (linux-headers...), actually I did that to install a newer kernel version ...
60
votes
9answers
249k views

How to install Skype with Ubuntu 13.04

jovan@jovan-HP-ProBook-4540s:~$ sudo apt-get install skype Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This ...
57
votes
4answers
341k views

How to install utorrent step by step?

I am trying to install utorrent instead of using the torrent apps and I just came off windows seven can someone help me?
72
votes
8answers
261k views

What is the path to the kernel headers so I can install vmware?

I installed the VMware bundle on my Ubuntu 11.04 successfully but when I open it it gives me this window and I don't know the path to this C headers.
157
votes
15answers
385k views

How to install Eclipse?

I want to install the latest version of Eclipse but the Ubuntu Software Centre contains an older version. Is there a PPA or some other way to install latest Eclipse? Please describe the steps for ...
367
votes
15answers
507k views

How do I resolve unmet dependencies after adding a PPA?

Occasionally, when I'm installing stuff, I get an error like the following: Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the ...
407
votes
34answers
487k views

How do I remove old kernel versions to clean up the boot menu?

Every time I install a new Linux kernel, it gets left in the grub_config, making the boot menu longer each time. I know I can manually search through the installed packages and remove them. Does ...
36
votes
4answers
60k views

Graphics issues after installing Ubuntu 16.04 with NVIDIA graphics

I installed or upgraded to Ubuntu 16.04, but I'm having some problems with my graphics card. The display is blank The display flickers Items on the screen do not display correctly Certain programs ...
11
votes
5answers
125k views

How to type the Indian Rupee Symbol?

I want to type the Indian Rupee Symbol. So I went to System Settings >> Keyboard Layout and clicked on the Options button. Under the Adding Currency signs to keys sections, I checked the Rupee on 4 ...
294
votes
15answers
327k views

How do you monitor the progress of dd?

dd is a wonder allowing you to duplicate a hard drive to another, completely zero a hard drive, etc. But once you launch a dd command, there's nothing to tell you of it's progress. It just sits there ...
209
votes
5answers
542k views

How can I copy the contents of a folder to another folder in a different directory using terminal?

I am trying to copy the contents of a folder to another folder in a different directory using terminal. Would somebody be able to provide me an example of the command line syntax required to achieve ...
244
votes
10answers
359k views

Is FFmpeg missing from the official repositories in 14.04?

I tried to install ffmpeg in trusty/Ubuntu 14.04 and got the following message: $sudo apt-get install ffmpeg Reading package lists... Done Building dependency tree Reading state information......
150
votes
16answers
403k views

How do I set Windows to boot as the default in the boot loader?

How do I set the bootloader so that in my dualboot with Windows 7/Ubuntu 11.04, Windows start up as standard instead of Ubuntu?
672
209
votes
3answers
640k views

What command do I need to unzip/extract a .tar.gz file?

I received a huge .tar.gz file from a client that contains about 800 mb of image files (when uncompressed.) Our hosting company's ftp is seriously slow, so extracting all the files locally and sending ...
122
votes
16answers
542k views

How do I add a DNS server via resolv.conf?

Is /etc/resolv.conf useless in Ubuntu 12.04 LTS (Precise Pangolin)? I see that the DNS server information is stored in NetworkManager now. The nmcli command line tool can list that for you. If I ...
90
votes
13answers
518k views

How do you run Ubuntu Server with a GUI?

Trying to run a Ubuntu server for the first time... But everything is in a terminal. Is there a way to switch to a GUI? Also, the server doesn't have direct access to the internet... So, is there a ...
548
78
votes
9answers
260k views

How to completely uninstall Java?

How can I completely remove all traces of Java on my system? I already know how to install it in case I need it again.
100
votes
5answers
439k views

How to use manual partitioning during installation?

I'd like to see the full How-To on how to use manual partitioning during Ubuntu installation. The existing guides (at least those I found here) cover only automatic part and leave untouched the manual ...
273
votes
18answers
322k views

Error message when I run sudo: unable to resolve host (none)

I have this issue on AWS on some servers. Whenever I run sudo the terminal is stuck doing seemingly nothing, until it finally spits out this error message. My terminal looks like this: ubuntu@(none):~...
79
votes
11answers
538k views

How do I run .sh files?

Whenever I open a .sh file, it opens it in gedit instead of the terminal. I can't find any option similar to Right Click → Open With → Other Application... → Terminal. How do I open this file in the ...
509
votes
7answers
612k views

How to enable or disable services?

I read about how to enable and disable services in Ubuntu and it seems that there are different possibilities to manage them. The first method I found is update-rc.d to add new services to startup, ...
111
votes
5answers
746k views

How do I start/stop mysql server?

I tried to find in some articles describing how to correctly start & stop mysql server. I found this link: How to start/stop MySql server on Ubuntu 8.04 | Abhi's Blogging World I ran this ...
278
246
votes
6answers
273k views

How do I turn on workspaces? (Why do I only have one workspace?)

It appears that Unity on Raring only comes with a single virtual desktop (aka workspaces) by default, and CCSM's Wall plugin has no way to add more. Is this configurable at all?
60
votes
8answers
323k views

How to install Python 3.4 on Ubuntu?

If I open Terminal and type in python, I see the version is 2.7.4. How do I get python 3.4? And do I need IDLE if I have sublime text?
6
votes
9answers
257k views

How do I type an `@` (at sign) symbol?

I have Ubuntu on my MacBook 2007 with a Spanish keyboard, on MacOS the @-sign was typed using Alt (Option) + 2, but on Ubuntu I have no idea. I have to copy and paste it every time. How do I type an ...
176
votes
1answer
310k views

Installed Teamviewer using a 64-bits system, but I get a dependency error

I was trying to install Teamviewer, but I was getting a dependency error. I tried to install them, but with no luck. I'm getting this error: Unpacking teamviewer (from teamviewer_linux_x64.deb) ... ...
158
votes
6answers
237k views

Why does a Ubuntu guest in VirtualBox run very, very slowly?

I'm using currently Ubuntu 12.04 LTS as a host machine, and I've virtualized three machines: a Xubuntu 12.04 guest a Windows 7 guest a Ubuntu 12.10 guest All the guests have the same VirtualBox ...
162
votes
10answers
587k views

How to use “grep” command to find text including subdirectories

I want to find all files which contain a specific string of text. The grep command works, but I don't know how to use it for every directory (I can only do it for my current directory). I tried ...
34
votes
4answers
500k views

How do I login as root?

I want to login as root, but when I enter sudo -s and enter password, this message is shown: "you are not in sudoers file", and when I enter su and enter password, this is shown: "...
456
222
votes
12answers
503k views

How do I find the amount of free space on my hard drive?

Is there a way to quickly check the amount of free / used disk space in Ubuntu? I would assume you could right click on 'file system' in the file browser and choose 'properties' or something but ...
277
votes
8answers
441k views

How to run scripts on start up?

How do I run scripts automatically when my computer starts up so I don't have to run scripts that I always run manually after startup?
53
votes
6answers
539k views

How to copy files via terminal?

I have read about copying files with terminal but these examples will help me a lot. So here is what I want to do: Examples: I have a file in /home/levan/kdenlive untitelds.mpg and I want to copy ...
391
votes
12answers
314k views

“The following packages have been kept back:” Why and how do I solve it?

I just added a PPA repository for the development version of the GIMP, but I get this error The following packages have been kept back: gimp gimp-data libgegl-0.0-0 libgimp2.0 Why and how can I ...
57
votes
15answers
164k views

How do I resolve a “Cannot open shared object file libudev.so.0” error?

Trying to run Game Dev Tycoon on Ubuntu 64. It asks for the above object. I ran sudo apt-get install libudev1:i386 and it came back already installed. I have /lib/i386-linux-gnu/libudev.so.1 but no ...