151
votes
5answers
187k views

How to Downgrade a Package via apt-get?

How to downgrade a package to an older version via apt-get?! Another tools are also accepted but apt-get is preferred.
149
votes
11answers
357k 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 ...
149
votes
6answers
27k views

How can I tell, from the command line, whether the machine requires a reboot?

When you install certain updates (e.g. a new kernel) in Ubuntu Desktop, you get an indication that a reboot is required (in Lucid, the logout icon turns red). How can I check, from the command line, ...
149
votes
8answers
39k views

I have a hardware detection problem, what logs do I need to look into?

I am trying to ask a question about getting my hardware to work but I don't know what information to add to my question to get help, what do I need to do? Related if you don't have access to a GUI: ...
149
votes
4answers
191k views

How do I patch/workaround SSLv3 POODLE vulnerability (CVE­-2014­-3566)?

After the BEAST attack and Heartbleed bug, now I've heard about a new vulnerability in SSL/TLS called POODLE. How do I protect myself against being exploited? Are only servers or also clients ...
149
votes
17answers
148k views

Is there a Google Drive client available?

I'd like to install a Google Drive client for Xubuntu (12.04). I'm getting non-English Google results, and I didn't find grive in the Xubuntu repositories. Does anyone know of a client that works ...
148
votes
9answers
8k views

How do I delete my commands quickly?

I use terminal for almost all tasks. Let's say I have entered a huge command like this: sudo a-huge-command What is the easiest way to delete the whole command with a single shortcut, rather than ...
148
votes
16answers
395k 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?
148
votes
5answers
480k views

What is the correct way to install proprietary ATI Catalyst Video Drivers (fglrx) directly from AMD?

I am planning on doing a fresh install of Ubuntu and want to know what is the correct way to install ATI Catalyst Video Driver? There are multiple valid answers for this question spanning over ...
148
votes
12answers
74k views

Why does Ubuntu Download recommend 32-bit install? [closed]

Update for 13.10: 64-bit version is now the default and 32-bit is labelled "for machines with less than 2GB RAM" The Ubuntu desktop download screen has a pair of radio buttons you use to select ...
147
votes
6answers
1.2m views

How to install Google Chrome?

How do you install Google Chrome on Ubuntu?
147
votes
10answers
128k views

How can I reduce or increase the number of workspaces in Unity?

I was reading about how to get multiple workspaces in the mutter version of Unity, however since Compiz is replacing Mutter how do I go about adding and removing workspaces in Compiz version of Unity?
147
votes
6answers
71k views

Is aptitude still considered superior to apt-get?

When I first started with Ubuntu using aptitude was the 'in-thing', with some stated improvements over apt-get. Am I correct in saying that apt-get has now 'caught up' with aptitude, and it makes ...
146
votes
22answers
166k views

Tips to extend battery life for laptops and notebooks

This question is present as a matter of historical interest. While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on Ask Ubuntu ...
145
votes
8answers
152k views

How to let `dpkg -i` install dependencies for me?

Say, I have foo-1.2.3.deb which depends on perl and python, however, running command: dpkg -i ./foo-1.2.3.deb won't install these dependencies. So I must apt-get install perl python by hand. How ...
145
votes
3answers
43k views

What's the right terminology for Unity's UI elements?

I've sent a few mails to the Ayatana mailing list regarding some UI suggestions for Unity, but I'm afraid I keep confusing the right terms for the UI element, so I would like to have some ...
145
votes
10answers
552k views

How to burn a Windows .iso to a USB device? [duplicate]

I want to burn a Windows ISO to a USB device in Ubuntu. How do I do this? I know how to burn a Ubuntu ISO into a USB device, but with a Windows ISO it's not the same.
144
votes
12answers
296k views

How to check Internet Speed via Terminal?

Instead of going to sites like speedtest.net, or others, I want to check my current Internet speed from the terminal on Ubuntu. How can I do it?
144
votes
6answers
119k views

How to patch the Heartbleed bug (CVE-2014-0160) in OpenSSL?

As of today, a bug in OpenSSL has been found affecting versions 1.0.1 through 1.0.1f (inclusive) and 1.0.2-beta. Since Ubuntu 12.04, we are all vulnerable to this bug. In order to patch this ...
144
votes
12answers
142k views

How can I tell Ubuntu to do nothing when I close my laptop lid?

I would like closing the laptop lid to be a no-op. How can I do that?
144
votes
6answers
93k views

What software can I use to view epub documents?

What software can I use to view .epub documents?
143
votes
25answers
235k views

How to fix Duplicate sources.list entry?

I keep getting this warning whenever I try to run sudo apt-get update. W: Duplicate sources.list entry http://archive.ubuntu.com/ubuntu/ precise-updates/main i386 Packages (/var/lib/apt/lists/archive....
143
votes
2answers
358k views

How to install Skype 4.3?

Skype 4.3 is just released with considerable improvements. As a regular Skype user I want to use the latest Skype on my Ubuntu 14.04, but there is no updates from Update Manager. Even in Skype website ...
143
votes
12answers
212k views

How do I change fonts and adjust their size?

I've been finding fonts on the internet and installing them on my system. What's the easiest way to change my fonts? I would prefer an easy to use graphical way, but answers with command line ...
143
votes
6answers
280k views

How do I find the kernel version, Ubuntu release and disk partition information from the terminal?

Which commands will give me information about following using Terminal? Kernel Version Distribution version no. All partition size of the HDD
142
votes
33answers
477k views

How do I download a YouTube video?

I am running Ubuntu 10.10; Can anybody please provide instructions on how to download videos from YouTube?
142
votes
6answers
56k views

How to understand the Ubuntu file system layout?

In Windows there’re perhaps only a couple of important folders (by important I mean important in my logical picture of the Windows file system) in the installation drive (in my case C:\). Namely ...
142
votes
7answers
109k views

How can I install Adobe AIR?

I am a heavy user of certain applications that are built on AIR. It appears that AIR has discontinued support for Linux. Even the older versions in the Adobe AIR Archives seem to support only 32 bit ...
142
votes
7answers
229k views

How can I decode a base64 string from the command line?

I would like to write a bash script to decode a base64 string. For example I type decode QWxhZGRpbjpvcGVuIHNlc2FtZQ== and it prints Aladdin:open sesame and returns to the prompt. So far I have tried ...
142
votes
7answers
381k views

How to restart X Window Server from command line?

How can I restart X Window Server from the command line? I'd really like to be able to restart my GUI without having to do a full system reboot.
141
votes
7answers
79k views

Missing date & time applet from top Unity panel

I like Unity very much. Recently, I installed Compiz manager and Nautilus Elementary also then tried to Play. During some of my playing around, Unity's clock applet has vanished. I want to make it ...
141
votes
16answers
196k views

How to check battery status using terminal?

I would like a command that check the battery status through the terminal
141
votes
12answers
184k views

How to modify a invalid /etc/sudoers file? It throws out an error and not allowing me to edit again

How do I edit an invalid visudo file? Here is what happens: $ sudo visudo >>> /etc/sudoers: syntax error near line 28 <<< sudo: parse error in /etc/sudoers near line 28 sudo: no ...
141
votes
4answers
123k views

Is there a power saving application similar to Jupiter?

I'm trying to install the Jupiter power settings app but, I read it is no longer compatible with the new kernel. Is there a similar program or a way to manage the power settings on 13.04?
141
votes
2answers
406k views

cannot change screen size from 640x480 after 14.04 installation on VirtualBox OSX [duplicate]

After installing Ubuntu 14.04 guest on VirtualBox running on a Max OSX host, I am stuck with 640x480 screen resolution. Adding guest additions again doesn't help. Previous Ubuntu installations are ...
141
votes
4answers
103k views

Why is “No new release found” when upgrading from a LTS to the next?

I'm following the upgrade instructions on Ubuntu's website, but on launching the upgrade tool I get this response: Checking for a new ubuntu release No new release found Am I doing something wrong? ...
139
votes
46answers
201k views

What Custom Launchers and Unity Quicklists are available?

Please note that right now, most of the information contained below is outdated and cannot be updated. Be careful, most of this won't work on Ubuntu 12.04 and newer. Creating a custom launcher for ...
139
votes
14answers
349k views

How to send mail from the command line?

How to send mail from the command line?
139
votes
12answers
112k views

How do I disable the guest session?

How do I disable the guest session in Ubuntu 11.10 or higher? I don't want people to be able to use my computer without using a password to log in!
138
votes
17answers
338k views

Unable to mount Windows (NTFS) filesystem due to hibernation

Whenever I boot Ubuntu, I get a message that it cannot mount my windows partition, and I can choose to either wait, skip or manually mount. When I try to enter my Windows partition through Nautilus I ...
138
votes
7answers
194k views

Is there a program like Microsoft Paint? [duplicate]

Greetings, I'm slowly getting used to Ubuntu; for I've been a Windows user as long as I've used any computer. I'm hoping someone can suggest a good graphics software. I'm simply looking for one ...
138
votes
1answer
96k views

Differences between /bin, /sbin, /usr/bin, /usr/sbin, /usr/local/bin, /usr/local/sbin [duplicate]

I'm running an Ubuntu Server 13.04, but I see the same on a 12.04: I have six directories with command files. These are: /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin What are the ...
137
votes
5answers
108k views

Which one is better: using ; or && to execute multiple commands in one line?

In tutorials and how-to's I often see commands combined. For instance, sudo apt-get update && sudo apt-get install pyrenamer There seem to be four possible connectors: &, &&, || ...
137
votes
6answers
203k views

How to list all variables names and their current values?

Including not only $HOME, $PWD etc but any other you have defined.
137
votes
3answers
85k views

What is the difference between /etc/init/ and /etc/init.d/?

What is the difference between /etc/init/ and /etc/init.d/? More generally, what meaning does the .d suffix convey to a directory?
137
votes
1answer
148k views

What is the difference between apt-get update and upgrade?

What is the difference between apt-get update and apt-get upgrade? Which should I run first? Do any of them automatically run the other?
135
votes
2answers
277k views

How to enable mod_rewrite in Apache?

I just installed the LAMP stack on my Ubuntu system. The redirection is not working for me. I don't know how to fix it. Can anyone help me?
135
votes
6answers
479k views

How to format a USB or external drive?

Using Ubuntu 11.10, how do I format an external or USB drive? I don't find an option to 'format' when I right click. In the new version, the drives don't come up on the desktop but instead come on ...
135
votes
12answers
163k views

How can I set up password-less SSH login?

I want to be able to login to a remote via ssh without having to enter the password all the time. How do I set it up? Is a different command required to execute a password-less session?
134
votes
12answers
219k views

How to display network traffic in terminal

how to display the actual network traffic (wireless) in a terminal? Additionally: Is it possible to add this info to the chart of top?

15 30 50 per page