apt 1.0.9.8.2 for amd64 compiled on Sep 15 2015 21:44:33
Usage: apt-cache [options] command
       apt-cache [options] showpkg pkg1 [pkg2 ...]
       apt-cache [options] showsrc pkg1 [pkg2 ...]
apt-cache is a low-level tool used to query information
from APT's binary cache files
Commands:
   gencaches - Build both the package and source cache
   showpkg - Show some general information for a single package
   showsrc - Show source records
   stats - Show some basic statistics
   dump - Show the entire file in a terse form
   dumpavail - Print an available file to stdout
   unmet - Show unmet dependencies
   search - Search the package list for a regex pattern
   show - Show a readable record for the package
   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
   dotty - Generate package graphs for GraphViz
   xvcg - Generate package graphs for xvcg
   policy - Show policy settings
Options:
  -h   This help text.
  -p=? The package cache.
  -s=? The source cache.
  -q   Disable progress indicator.
  -i   Show only important deps for the unmet command.
  -c=? Read this configuration file
  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp
See the apt-cache(8) and apt.conf(5) manual pages for more information.