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when I enter

$ apt-cache showpkg gnome-devel

in my terminal, I get :

Package: gnome-devel
1:3.0+6ubuntu4 (/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_quantal_universe_binary-amd64_Packages)
Description Language: 
    File: /var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_quantal_universe_binary-amd64_Packages
MD5: 4682dc9d7825daf220363435b46d793b
 Description Language: en
File:               /var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_quantal_universe_i18n_Translation-en
                  MD5: 4682dc9d7825daf220363435b46d793b

Reverse Depends: 
1:3.0+6ubuntu4 - anjuta (2 2:3.0) anjuta-extras (2 3.0) devhelp (2 3.0) glade (2 3.10) gnome-devel-docs (2 3.0) gnome-platform-devel (0 (null)) 
1:3.0+6ubuntu4 - 
Reverse Provides:

But there is a some details that I don't understand ?

  • What does means "1:3.0+6ubuntu4" here ? Is it the minimum Ubuntu version for this package ?
  • What does means (0 (null)) for the dependency package gnome-platform-devel ? I think that it is for saying that this package is just recommended : I am right ?
  • In ajunta (2 2:3.0) : what does mean the leading "2" in version number (2 2:3.0) ? I think that it is for ">=" : am I right ? Regards
share|improve this question
sudo apt-cache search gnome-devel – Qasim May 6 '13 at 8:42
man apt-cache ... – Qasim May 6 '13 at 8:43
apt-cache search does not give me required versions numbers. Man apt-cache does not provides enough information for (0 (null)) – loloof64 May 6 '13 at 8:56
up vote 2 down vote accepted

Finally aptitude helps me

$ LANG=C aptitude show gnome-devel
Package: gnome-devel                     
State: not installed
Version: 1:3.0+6ubuntu4
Priority: optional
Section: universe/devel
Maintainer: Ubuntu Developers <>
Architecture: all
Uncompressed Size: 43.0 k
Depends: anjuta (>= 2:3.0), anjuta-extras (>= 3.0), devhelp (>= 3.0), glade (>=
     3.10), gnome-devel-docs (>= 3.0)
Recommends: gnome-platform-devel
Description: The GNOME Desktop Environment -- development tools
 These are the development tools of the GNOME Desktop environment, an intuitive
 and attractive desktop. 

 This meta-package depends on a recommended set of applications to develop new
 programs for GNOME.
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