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1500 questions
102
votes
2 answers

What is the purpose of the ssl-cert-snakeoil.key

Right now I installed ubuntu 12.04.3 server which I want to access via ssh. For that reason I created a private key which I moved to /etc/ssl/private/ I'm just wondering why there already is private key ssl-cert-snakeoil.key in there. Where is…
My-Name-Is
  • 1,137
102
votes
6 answers

Terminal command with sudo takes a long time

I noticed that the terminal recently becomes too slow when I execute a command that needs my password. It takes some seconds to display [sudo] password for ... I'm using Dell XPS developer edition (i7,8G RAM) with Ubuntu 13.04 64bit.
Nasreddine
  • 1,677
102
votes
13 answers

Is there a way to make a fullscreen on VirtualBox?

I tried many ways to make a bigger screen in VirtualBox because I do not like the small size of the guest window? Is there is a way to make it big?
tyblo
  • 1,121
102
votes
5 answers

What's the difference between 'killall' and 'pkill'?

After using just plain kill on Unix systems for many years, I learned pkill from a younger Linux-savvy co-worker colleague1. I soon accepted the Linux-way,pgrep-ing and pkill-ing through many days and nights, through slow-downs and race…
belacqua
  • 23,540
102
votes
3 answers

Gconf, Dconf, Gsettings and the relationship between them

I'm trying to understand how Gconf, Dconf and Gsettings works and what the relationship is between them. All I know is: Gconf - XML based database (backend system). The older one. Dconf - BLOB based database (backend system). The newer…
idgar
  • 3,010
102
votes
11 answers

How to reduce the size of a pdf file?

I'm looking for a way in Ubuntu to reduce the size of a pdf (by reducing the quality of the images). I know that this can be done in Ghostscript by typing the following command in terminal: gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4…
Nicole
  • 1,121
102
votes
20 answers

How to prevent my screen from either dimming or the screen-lock starting when watching YouTube?

My screen brightness used to dim after a few seconds to preserve battery. This is default in Ubuntu 12.04. However when watching video it should not dim. This works correctly when I watch videos using native applications like VLC. With in-browser…
Steven Roose
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102
votes
7 answers

How to manage available wireless network priority?

I'd like to move up and down available wireless access points, setting priorities as we can do in Microsoft Windows. I can't remember to have ever succeeded in this since using network-manager. Maybe something with conf files is possible... I'm not…
jasmines
  • 11,311
102
votes
6 answers

MongoDB Install Fails on Ubuntu 22.04 - Depends on libssl1.1 but it is not installable

Here are the standard installation instructions from the website: wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add - echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse"…
fIwJlxSzApHEZIl
  • 1,476
102
votes
4 answers

How do I create a completely unattended install of Ubuntu?

I need a CD or USB stick, that will install Ubuntu on a completely headless machine. Stick CD in and restart, no keyboard or screen should be involved. There are a few obstacles: The language selection menu when you first boot the CD. The fact that…
Elazar Leibovich
  • 2,856
102
votes
4 answers

How to run .sh file

Possible Duplicate: How do I run .sh files in Terminal? I want to download JDownloader from the internet for Linux. But the file is .sh and when I tell ubuntu to open the file it uses some text editor. I searched Ubuntu Software Store and there…
Atladica
  • 1,377
102
votes
11 answers

How to launch application as root from Unity Launcher?

Mainly I am looking for a way to pin an application to the Unity launch bar, and run it as root. Currently, even if I start the application with sudo, and pin it after it starts, it will start as current user next time. Sad, but there is no context…
sorin
  • 10,135
102
votes
4 answers

How to set custom lock screen time in Ubuntu 18.04

The maximum lock time in Ubuntu 18.04, when set via GUI, is 15 minutes. This can be set in Settings → Power → Power Saving → Blank screen. I'd like to increase this to 30 minutes for my machine at home. How can I do that?
Daniel C
  • 4,170
102
votes
6 answers

Turn off error sound on Ubuntu 18.04

How do I turn off the Ubuntu error sound (especially on the terminal) in Ubuntu 18.04?
sam
  • 2,836
101
votes
2 answers

Firefox Middle Mouse Button Scroll

How can I get the middle mouse button to behave correctly in Ubuntu? Clicking the middle button does not show the arrow which allows me to scroll the page by moving the mouse. Information: Firefox 3.6.8 Mouse: Microsoft Intellimouse Explorer 3.0
The Pixel Developer
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