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1500 questions
103
votes
11 answers

How to reduce the size of a PDF file by reducing the quality of the images?

I'm looking for a way in Ubuntu to reduce the size of a PDF file by reducing the quality of the images. I know that this can be done in Ghostscript by running the following command in terminal: gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4…
Nicole
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103
votes
3 answers

How to show gnome-terminal menubar?

I accidentally unchecked View -> Show Menubar which hides the menubar for gnome-terminal, and there doesn't appear to be a keyboard shortcut to show the menubar again. How can I make gnome-terminal show the menubar again?
Isaiah
  • 60,830
103
votes
8 answers

How to not install recommended and suggested packages?

I use Ubuntu 12.04 64-bit, I did the following: sudo gedit /etc/apt/apt.conf and added APT::Install-Recommends "false"; APT::Install-Suggests "false"; But it did not work. When I try to install a package, it still wants to install the suggested and…
user84911
  • 1,101
103
votes
7 answers

How can I remove "Show Desktop" from the Alt-Tab (application) switcher?

Is it possible to remove "Show Desktop" from the Alt + Tab application switcher?
David Dossot
  • 1,106
103
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
  • 11,331
103
votes
16 answers

How to get coloured terminal over ssh?

When I connect over ssh to remote hosts everything is just a single font/color. I would like to have colours like I do locally e.g. green for executable and blue for symlinks etc. And such that when I run $ git diff on the ssh host it shows me diff…
Dima
  • 9,965
103
votes
7 answers

How to create an ISO image from a bunch of files on the file system?

Considering I have a bunch of files in a directory, I would like to bundle them into an ISO image file. How should I proceed to do that?
Zignd
  • 11,002
103
votes
7 answers

How to change the password of an encrypted LVM system (previously alternate Installation, now advanced feature)?

I installed Ubuntu 11.10 with the alternate CD and encrypted the whole system (except boot) with the encrypted LVM. Update 2020 : Encrypted LVM can be selected at the Installation type step of the Ubuntu install, click on Advanced features and…
Filbuntu
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103
votes
4 answers

How do you resize the standard Ubuntu Desktop inside of Virtualbox?

So I've installed Ubuntu inside of Virtualbox, and I resized the window of Virtualbox to be full-size, but the Ubuntu Desktop stays the same standard size. How do I make the width of Ubuntu stretch 100% across the Virtualbox window?
willbeeler
  • 2,019
103
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
  • 4,190
103
votes
5 answers

Difference between 'dir' and 'ls' terminal commands?

I've been trying to find the difference between using the dir and ls commands in terminal. I know ls is the traditional UNIX method of viewing the files in a directory, and that dir is the windows command prompt equivalent, but both commands work in…
BretD
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103
votes
6 answers

Howto to move window to another monitor on the left/right using keyboard shortcut?

I have always used Ctrl + Alt + Shift + Left / Right to move windows from left to right monitors. Installed Ubuntu 18.04 last week (fresh install) and it appears that this is not working anymore despite the fact I had configured them like this in…
dgoosens
  • 1,161
102
votes
4 answers

How can I make /etc/rc.local run on startup?

I have a script I would like to run when my system starts and have put it in /etc/rc.local , but it doesn't work. How can I enable it to run on startup?
pedroo
  • 1,225
102
votes
1 answer

What is available memory while using free command?

The output of the free command that I fired on my linux host is as belows: free total used free shared buff/cache available Mem: 263846320 47746620 3290072 1140808 212809628 214382420 Swap: 0 0 0 I am not able to figure out what this available part…
Nishant Lakhara
  • 1,123
102
votes
2 answers

What are some of the issues with CCSM and why would I want to avoid it?

I've seen some people complaining about how unstable CompizConfig Settings Manager ("CCSM") is and how it can break people's desktops if they're not careful. What are some of the known problems with CCSM? I'd like to decide whether or not it's worth…
Jorge Castro
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