What is etc apt preferences?
/etc/apt/preferences. file is used to control the priority of a source distribution in the. /etc/apt/sources.list. /etc/apt/sources. , and it is also used to control the priority of individual or multiple binary packages .
What is Pin priority?
apt_preferences (APT pinning) To know which one should be installed, Apt assigns priorities to packages. The default is 500. If the packages have the same priority, the package with a higher version number (most recent) wins. If packages have different priorities, the one with the higher priority wins.
Where does apt install Python packages?
A non-Debian Python installation, such as Python compiled from source, will install Python packages into /usr/local/lib/pythonX. Y/site-packages by default, where X.Y is your Python version (such as 2.7 ).
What is the difference between Dist packages and site-packages?
dist-packages is the debian-specific directory where apt and friends install their stuff, and site-packages is the standard pip directory.
How does apt cache work?
When apt-get update is called, apt tries to connect to all specified repositories in the file and download information about those repositories about what programs are available and so on. It caches all retrieved data locally in order to use it later without making internet requests to the repository.
How does the preferences file in APT Work?
The APT preferences file overrides the priorities that APT assigns to package versions by default, thus giving the user control over which one is selected for installation. Several instances of the same version of a package may be available when the sources.list (5) file contains references to more than one source.
Which is the highest priority in apt preferences?
(“Downgrading” is installing a less recent version of a package in place of a more recent version. Note that none of APT’s default priorities exceeds 1000; such high priorities can only be set in the preferences file. Note also that downgrading a package can be risky.) Install the highest priority version.
How to control which version of APT is installed?
The APT preferences file /etc/apt/preferences can be used to control which versions of packages will be selected for installation. Several versions of a package may be available for installation when the sources.list (5) file contains references to more than one distribution (for example, stable and testing).
When to use list ( 5 ) in Apt?
Several versions of a package may be available for installation when the sources.list (5) file contains references to more than one distribution (for example, stable and testing). APT assigns a priority to each version that is available.