[a.......@localhost ~]$ man apt-cache
APT-CACHE(8) APT-CACHE(8)
NAME
apt-cache - APT package handling utility -- cache manipulator
SYNOPSIS
apt-cache [ -hvsn ] [ -o=config string ] [ -c=file ] { add file ... | gencaches | showpkg pkg ... | showsrc
pkg ... | stats | dump | dumpavail | unmet | search regex | show pkg ... | depends pkg ... | whatdepends
pkg ... | pkgnames prefix | dotty pkg ... | policy pkgs ... }
DESCRIPTION
apt-cache performs a variety of operations on APT's package cache. apt-cache does not manipulate the state of
the system but does provide operations to search and generate interesting output from the package metadata.
Unless the -h, or --help option is given, one of the commands below must be present.
add file(s)
add adds the named package index files to the package cache. This is for debugging only.
gencaches
gencaches performs the same operation as apt-get check. It builds the source and package caches from
the sources in sources.list(5) and from /var/lib/dpkg/status.
showpkg pkg(s)
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 dependen-
cies need not be. For instance, apt-cache showpkg libreadline2 would produce output similar to the
following:
Package: libreadline2
Versions: 2.1-12(/var/lib/apt/lists/foo_Packages),
Reverse Depends:
libreadlineg2,libreadline2
libreadline2-altdev,libreadline2
Dependencies:
2.1-12 - libc5 (2 5.4.0-0) ncurses3.0 (0 (null))
Provides:
2.1-12 -
Reverse Provides:
Thus it may be seen that libreadline2, version 2.1-12, depends on libc5 and ncurses3.0 which must be
installed for libreadline2 to work. In turn, libreadlineg2 and libreadline2-altdev depend on libread-
line2. If libreadline2 is installed, libc5 and ncurses3.0 (and ldso) must also be installed; libread-
lineg2 and libreadline2-altdev do not have to be installed. For the specific meaning of the remainder
Так и тут нет
В системе она есть в виде каких то бинарных, двоичных кодов
Пойду пока спать
