Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Debian GNU/Linux Reference Guide
Prev Home Next

2.2.8 Package dependencies

The Debian packaging system handles dependency declarations which are used to express the fact that one package requires another package to be installed in order to work or in order to work better.

  • Package A Depends on Package B if B absolutely must be installed in order to use A. In some cases, A Depends not only on B, but on a specific version of B. In this case, the version dependency is usually a lower limit, in the sense that A Depends on any version of B more recent than some specified version.

  • Package A Recommends Package B if the package maintainer judges that most users would not want A without also having the functionality provided by B.

  • Package A Suggests Package B if B contains files that are related to and enhance the functionality of A. The same relationship is expressed by declaring that Package B Enhances Package A.

  • Package A Conflicts with Package B when A will not operate properly if B is installed on the system. "Conflicts" status is often combined with "Replaces".

  • Package A Replaces Package B when files installed by B are removed or overwritten by files in A.

  • Package A Provides Package B when all of the files and functionality of B are incorporated into A.

More detailed information on the use of each these terms can be found in the Packaging Manual and the Policy Manual.

Note that dselect has more fine-grained control over packages specified by Recommends and Suggests than apt-get, which simply pulls all the packages specified by Depends and leaves all the packages specified by Recommends and Suggests. Both programs in modern form use APT as their back end.


Debian GNU/Linux Reference Guide
Prev Home Next

 
 
  Published under the terms of the GNU General Public License Design by Interspire