Sunday, January 31, 2016

[HOW TO] Get a list of packages that use most space

Let's learn how to get a list of installed packages that use most space, with sizes shown as "human readable mode".

Install

Fist we need to install debian-goodies. Open a terminal window and run:

sudo apt-get install debian-goodies -y

List top 10 packages

$ dpigs -H
 258.2M nvidia-340-updates
 171.7M google-chrome-stable
 154.4M wine-staging-amd64
 145.2M wine-staging-i386
 144.9M linux-image-extra-3.13.0-74-generic
 137.0M blender
 117.7M wine1.6-amd64
 116.2M krita-testing
 112.7M wine1.6-i386
 111.0M libreoffice-core

List top N packages

$ dpigs -H n 5
 258.2M nvidia-340-updates
 171.7M google-chrome-stable
 154.4M wine-staging-amd64
 145.2M wine-staging-i386
 144.9M linux-image-extra-3.13.0-74-generic

[HOW TO] Save disk space removing old linux-headers

Even though old kernels have been removed (as described in this preview post), linux-headers packages may still be left behind using precious disk space. Here's how to remove them.

Recovering disk space

Open a terminal window and run:

current_kernel=$(uname -r) && dpkg-query -W -f='${Package}\n' 'linux-headers-[0-9].[0-9][0-9]*' | egrep -v ${current_kernel%-generic} | xargs sudo apt-get remove -y

Running this command I was able to recover a little bit more than 1GB of disk space:

After this operation, 1075 MB disk space will be freed.

Disclaimer

Use this command at your own risk. To see what the command will remove just run the first part, without apt-get remove:

current_kernel=$(uname -r) && dpkg-query -W -f='${Package}\n' 'linux-headers-[0-9].[0-9][0-9]*' | egrep -v ${current_kernel%-generic}

Saturday, October 10, 2015

[SOLVED] VLC could not decode the format "hevc"

Problem

VLC shows the following error when opening H.265/HEVC files:

VLC could not decode the format "hevc"

Solution

We need to install the package vlc-plugin-libde265. Open a terminal window and run:

sudo apt-get install vlc-plugin-libde265 -y

References

How to install H.265 / HEVC codec on Ubuntu Linux?

Thursday, April 23, 2015

[SOLVED] Can't login into Twitter on Firefox

Problem

When trying to log in into a Twitter account using the Firefox web browser, the page refreshes after hitting the login button but our status remains as logged off.

Solution

Remove all Twitter cookies. Here's how:

  1. Open Firefox preferences.
  2. Open the Privacy tab and click on "remove individual cookies"
  3. Search for twitter, select all Twitter cookies (using shift) and hit Remove Selected
  4. Voilá! You should be able to login into your Twitter account now.

Tuesday, March 3, 2015

[SOLVED] Firefox opens blank pages intead of URL

Problem

When trying to open an URL with Firefox (eg. via File Manager of Mail Reader), Firefox opens a blank page or your homepage (if it's set to something other than blank) instead of the URL.

This situation has been reported and confirmed as a bug (bug #1427144 on launchpad).

Solution

It seems that the problem is in the file /usr/share/xfce4/helpers/firefox.desktop, and replacing the last line fixes it.

Fix

You can fix it manually (1) or just run the command (2) that creates a backup and automatically replaces the broken line.

  1. Manual: Open /usr/share/xfce4/helpers/firefox.desktop with your favorite text editor and root permissions (eg. sudo mousepad /usr/share/xfce4/helpers/firefox.desktop). Then replace the following line:

    X-XFCE-CommandsWithParameter=%B -remote "openURL(%s)";%B %s;

    With this one:

    X-XFCE-CommandsWithParameter=%B %s;%B %s;
  2. Automatic: Open a terminal window and run:

    cd /usr/share/xfce4/helpers/ && sudo cp firefox.desktop firefox.desktop.bak && sudo sed -i 's/-remote "openURL(%s)"/%s/' firefox.desktop
    

References

firefox open blank pages when called from exo-open

Friday, January 2, 2015

[TIP] Convert jpeg to PDF

In this article we'll learn how to create a PDF file from a bunch of jpeg images (it can be adapted for other image types as well).

Install

First we need to install the imagemagick package, so open a terminal window and run:

sudo apt-get install imagemagick -y

Convert

Then change the current directory to where the images are located and use this command to convert to PDF:

convert *.jpeg output.pdf

Change output.pdf to whatever name you like/need.

Friday, October 24, 2014

[NEWS] Xubuntu 14.10 Released!

Xubuntu 14.10 Utopic Unicorn has been released.

No big news to report, but here's some changes/highlights:

  • New Xfce Power Manager plugin is added to the panel
  • Items in the newly themed alt-tab dialog can now be clicked with the mouse
  • pkexec instead of gksu
  • XChat removed and Inxi added to default installed applications.

Get it here. You can download the new Xubuntu via Torrent or HTTP. If possible choose Torrent to not overload the servers.

References

Xubuntu 14.10 released! | Xubuntu.org