apt (Advanced Package Tool) is the command-line tool for handling packages. It provides a commandline interface for the package management of the system. See also apt-get(8) and apt-cache(8)
for more low-level command options.

常用命令

• list
  list is used to display a list of packages. It supports shell pattern for matching package names and the following options: –installed,–upgradable,–all-versions are supported.

• search
  search searches for the given term(s) and display matching packages.

• show
  show shows the package information for the given package(s).

• install
  install is followed by one or more package names desired for installation or upgrading.

  A specific version of a package can be selected for installation by following the package name with an equals and the version of the package to select. This will cause that version to be
  located and selected for install. Alternatively a specific distribution can be selected by following the package name with a slash and the version of the distribution or the Archive name
  (stable,testing,unstable).

• remove
  remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended
  to the package name (with no intervening space),the identified package will be installed instead of removed.

• edit-sources
  edit-sources lets you edit your sources.list file and provides basic sanity checks.

• update
  update is used to resynchronize the package index files from their sources.

• upgrade
  upgrade is used to install the newest versions of all packages currently installed on the system from the sources enumerated in /etc/apt/sources.list. New package will be installed,but
  existing package will never removed.

• full-upgrade full-upgrade performs the function of upgrade but may also remove installed packages if that is required in order to resolve a package conflict.