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authorArch Librarian <arch@canonical.com>2004-09-20 16:51:58 +0000
committerArch Librarian <arch@canonical.com>2004-09-20 16:51:58 +0000
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tree101afb1e9d04e8b4918f624a1c0f2ce7fa42f37c /doc/apt-cache.8
parentde50f0480662ebe4af9591a583124a6b2e38b993 (diff)
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Author: jgg Date: 1998-12-05 22:14:39 GMT Man pages in yodl
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-.\" This manpage is copyright (C) 1998 Branden Robinson <branden@debian.org>.
-.\"
-.\" This is free software; you may redistribute it and/or modify
-.\" it under the terms of the GNU General Public License as
-.\" published by the Free Software Foundation; either version 2,
-.\" or (at your option) any later version.
-.\"
-.\" This is distributed in the hope that it will be useful, but
-.\" WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-.\" GNU General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU General Public
-.\" License along with APT; if not, write to the Free Software
-.\" Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-.\" 02111-1307 USA
-.TH apt-cache 8 "16 June 1998" "Debian GNU/Linux"
-.SH NAME
-apt-cache \- APT package handling utility \(em cache manipulator
-.SH SYNOPSIS
-.B apt-cache
-.I command cache
-.RI [ argument
-.IR ... ]
-.SH DESCRIPTION
-.B apt-cache
-performs a variety of operations on APT's package cache.
-.I apt-cache
-is seldom called directly; instead it is usually invoked internally by
-.BR apt-get (8)
-or
-.BR apt (8).
-.PP
-.I command
-is one of
-.RS
-.PD 0
-.B add
-.PP
-.B dump
-.PP
-.B dumpavail
-.PP
-.B showpkg
-.PP
-.B stats
-.RE
-.PD 1
-.PP
-.I cache
-must be a package cache file (for instance,
-.IR /var/cache/apt/pkgcache.bin ).
-Some
-.IR command s
-require additional arguments.
-.SS add
-.B add
-adds a new set of package records to
-.IR cache .
-Remaining arguments are of the form
-.IR file : dist : ver ,
-where
-.I file
-is the full path to file in question.
-.I dist
-and
-.I ver
-can be any string and are not yet implemented.
-.SS dump
-.B dump
-displays information about all the packages in the cache. See
-.B showpkg
-below for an explanation of what data is output for each package.
-.SS dumpavail
-.B dumpavail
-generates an
-.I available
-file suitable for use with
-.BR dpkg (8)
-based on the information in the cache.
-.SS showpkg
-.B showpkg
-displays information about the packages listed on the command line.
-Remaining arguments are package names. The available versions and
-reverse dependencies of each package listed are listed, as well as
-forward dependencies for each version. Forward (normal) dependencies
-are those packages upon which the package in question depends; reverse
-dependencies are those packages that depend upon the package in
-question. Thus, forward dependencies must be satisfied for a package,
-but reverse dependencies need not be.
-For instance,
-.B apt-cache showpkg
-.I cache
-.B libreadline2
-would produce output similar to the following:
-.PP
-.RS
-.PD 0
-Package: libreadline2
-.PP
-Versions: 2.1-8,2.1-7,
-.PP
-Reverse Depends:
-.RS
-.PP
-libreadlineg2,libreadline2
-.PP
-libreadlineg2,libreadline2
-.PP
-libreadline2-altdev,libreadline2
-.RE
-.PP
-Dependencies:
-.PP
-2.1-8 - libc5 ncurses3.0 ldso
-.PP
-2.1-7 - ldso libc5 ncurses3.0
-.RE
-.PD 1
-.PP
-Thus it may be seen that libreadline2, version 2.1-8, depends on libc5,
-ncurses3.0, and ldso, which must be installed for libreadline2 to work. In
-turn, libreadlineg2 and libreadline2-altdev depend on libreadline2. If
-libreadline2 is installed, libc5, ncurses3.0, and ldso must also be
-installed; libreadlineg2 and libreadline2-altdev do not have to be
-installed.
-.SS stats
-.B stats
-displays some statistics about
-.IR cache .
-No further arguments are expected. Statistics reported are:
-.RS
-.TP
-.I Total package names
-is the number of package names found in the cache.
-.TP
-.I Normal packages
-is the number of regular, ordinary package names; these
-are packages that bear a one-to-one correspondence between their names and
-the names used by other packages for them in dependencies. The majority of
-packages fall into this category.
-.TP
-.I Pure virtual packages
-is the number of packages that exist only as a virtual package name; that
-is, packages only "provide" the virtual package name, and no package
-actually uses the name. For instance, "mail-transport-agent" in the Debian
-GNU/Linux system is a pure virtual package; several packages provide
-"mail-transport-agent", but there is no package named "mail-transport-agent".
-.TP
-.I Single virtual packages
-is the number of packages with only one package providing a particular
-virtual package. For instance, in the Debian GNU/Linux system,
-"X11-text-viewer" is a virtual package, but only one package, xless,
-provides "X11-text-viewer".
-.TP
-.I Mixed virtual packages
-is the number of packages that either provide a particular virtual package
-or have the virtual package name as the package name. For instance, in the
-Debian GNU/Linux system, e2fsprogs is both an actual package, and
-provided by the e2compr package.
-.TP
-.I Missing
-is the number of package names that were referenced in a dependency but
-were not provided by any package. Missing packages may be in evidence
-if a full distribution is not accesssed, or if a package (real or virtual)
-has been dropped from the distribution.
-.TP
-.I Total distinct versions
-is the number of package versions found in the cache; this value is
-therefore at least equal to the number of total package names. If more than
-one distribution (both "stable" and "unstable", for instance), is being
-accessed, this value can be considerably larger than the number of total
-package names.
-.TP
-.I Total dependencies
-is the number of dependency relationships claimed by all of the packages in
-the cache.
-.RE
-.SH OPTIONS
-None.
-.SH FILES
-None.
-.SH SEE ALSO
-.BR apt (8),
-.BR apt-get (8),
-.I /usr/doc/apt/cache*
-.SH DIAGNOSTICS
-apt-cache returns zero on normal operation, decimal 100 on error.
-.SH BUGS
-See <http://www.debian.org/Bugs/db/pa/lapt.html>. If you wish to report a
-bug in
-.BR apt-cache ,
-please see
-.I /usr/doc/debian/bug-reporting.txt
-or the
-.BR bug (1)
-command.
-.SH AUTHOR
-apt-cache was written by the APT team <apt@packages.debian.org>.