apt-cache

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Usage:

  • apt-cache [options] command
  • apt-cache [options] show pkg1 [pkg2 …]

apt-cache queries and displays available information about installed and installable packages. It works exclusively on the data acquired into the local cache via the ‘update’ command of e.g. apt-get. The displayed information may therefore be outdated if the last update was too long ago, but in exchange apt-cache works independently of the availability of the configured sources (e.g. offline).

Most used commands:

  • showsrc - Show source records
  • search - Search the package list for a regex pattern
  • depends - Show raw dependency information for a package
  • rdepends - Show reverse dependency information for a package
  • pkgnames - List the names of all packages in the system
  • policy - Show policy settings
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