Mendapatkan detail tentang suatu paket sebelum menginstalnya?

Ketika saya mengetik "mc" pada terminal Ubuntu 14,04 saya, saya mendapatkan

The program 'mc' is currently not installed. You can install it by typing:
sudo apt-get install mc

Bagaimana saya bisa mendapatkan detail tentang program 'mc' sebelum menginstalnya? Saya ingin mengkonfirmasi bahwa itu adalah file yang saya inginkan, dan bukan yang lain.

Cara tercepat menggunakan terminal dan apt-cachedan sedikit kepercayaan ;)

apt-cache show mc

Package: mc
Priority: optional
Section: universe/utils
Installed-Size: 1434
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Debian MC Packaging Group <[email protected]>
Architecture: amd64
Version: 3:4.8.13-3
Provides: mcedit
Depends: e2fslibs (>= 1.37), libc6 (>= 2.15), libglib2.0-0 (>= 2.35.9), libgpm2 (>= 1.20.4), libslang2 (>= 2.2.4), libssh2-1 (>= 1.2.5), mc-data (= 3:4.8.13-3)
Recommends: mime-support, perl, unzip
Suggests: arj, bzip2, catdvi | texlive-binaries, dbview, djvulibre-bin, file, genisoimage, gv, imagemagick, links | w3m | lynx, odt2txt, poppler-utils, python, python-boto, python-tz, xpdf | pdf-viewer, zip
Filename: pool/universe/m/mc/mc_4.8.13-3_amd64.deb
Size: 464160
MD5sum: 8bb8f947d50bcba2f68d2b66a66963c1
SHA1: c61ad7e5581ee46619069c0435c54be5e1fc34c7
SHA256: 21557289003bd195ff5a0212a00365067c5d15f0f9767556512c09da96a012d5
Description-en: Midnight Commander - a powerful file manager
 GNU Midnight Commander is a text-mode full-screen file manager. It
 uses a two panel interface and a subshell for command execution. It
 includes an internal editor with syntax highlighting and an internal
 viewer with support for binary files. Also included is Virtual
 Filesystem (VFS), that allows files on remote systems (e.g. FTP, SSH
 servers) and files inside archives to be manipulated like real files.
Description-md5: 252a5c5aeeb7425db45357d4ab8aa55f
Homepage: http://www.midnight-commander.org
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

kemungkinan lain adalah aptitude, tetapi biasanya Anda harus menginstalnya terlebih dahulu:

sudo apt-get install aptitude

Dan perlihatkan informasi paket dengan aptitude show aptitude

Package: aptitude                        
State: installed
Automatically installed: no
Multi-Arch: foreign
Version: 0.6.11-1ubuntu3
Priority: optional
Section: admin
Maintainer: Ubuntu Developers <[email protected]>
Architecture: amd64
Uncompressed Size: 4.990 k
Depends: aptitude-common (= 0.6.11-1ubuntu3), libapt-pkg4.12 (>= 0.9.16), libboost-iostreams1.55.0, libc6 (>= 2.14), libcwidget3, libgcc1 (>= 1:4.1.1), libncursesw5 (>= 5.6+20070908), libsigc++-2.0-0c2a (>= 2.2.0), libsqlite3-0 (>=
         3.6.5), libstdc++6 (>= 4.9), libtinfo5, libxapian22
Recommends: aptitude-doc-en | aptitude-doc, sensible-utils, libparse-debianchangelog-perl
Suggests: tasksel, debtags, apt-xapian-index
Conflicts: aptitude
Provides: aptitude
Provided by: aptitude
Description: terminal-based package manager
 aptitude is a package manager with a number of useful features, including: a mutt-like syntax for matching packages in a flexible manner, dselect-like persistence of user actions, the ability to retrieve and display the Debian
 changelog of most packages, and a command-line mode similar to that of apt-get. 

 aptitude is also Y2K-compliant, non-fattening, naturally cleansing, and housebroken.
Homepage: http://aptitude.alioth.debian.org/

Menggunakan GUI Anda dapat membuka "Ubuntu Software Center" dan mencari mcatau Midnight Commander.

Ini akan memberi Anda gambaran lengkap tentang paket tersebut. Ini juga berguna, jika Anda tidak tahu nama paket yang tepat.

Anda juga dapat menginstal Synaptic dan melakukan pencarian serupa di sana.

Perangkat lunak dapat diinstal di Pusat Perangkat Lunak atau Synaptic juga tanpa menggunakan baris perintah.

Ada banyak cara Anda bisa melakukan ini. Paling mudah secara default adalah apt-cache search.

apt-cache search <regex>

Ini akan memberi Anda sesuatu seperti ini:

$ apt-cache search cheese
cheese - tool to take pictures and videos from your webcam
gir1.2-cheese-3.0 - tool to take pictures and videos from your webcam - gir bindings
libcheese-dev - tool to take pictures and videos from your webcam - base dev
libcheese-doc - tool to take pictures and videos from your webcam - documentation
libcheese-gtk-dev - tool to take pictures and videos from your webcam - widgets dev
libcheese-gtk23 - tool to take pictures and videos from your webcam - widgets
libcheese7 - tool to take pictures and videos from your webcam - base library
cheese-common - Common files for the Cheese tool to take pictures and videos
python-pyip - Python modules for raw ip packet assembling/disassembling

Ini agak sama dengan:

dpkg-query -Wf '${Package} ${binary:Summary}\n'

Kecuali yang dpkg-querytampaknya hanya bekerja pada hal-hal yang sudah Anda instal.

apt listmemiliki pencarian glob (bukan regex) yang sedikit lebih alami untuk sebagian besar pengguna tetapi Anda tidak dapat mengubah format output (belum). Namun, setelah melihat sumbernya , Anda dapat menampilkan ringkasan:

$ apt list -o 'APT::Cmd::List-Include-Summary=1'  *cheese* 
Listing... Done
cheese/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam

cheese-common/trusty 3.10.2-0ubuntu2 all
  Common files for the Cheese tool to take pictures and videos

gir1.2-cheese-3.0/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam - gir bindings

libcheese-dev/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam - base dev

libcheese-doc/trusty 3.10.2-0ubuntu2 all
  tool to take pictures and videos from your webcam - documentation

libcheese-gtk-dev/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam - widgets dev

libcheese-gtk23/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam - widgets

libcheese7/trusty 3.10.2-0ubuntu2 amd64
  tool to take pictures and videos from your webcam - base library

Ini sedikit suap dengan argumen opsi tetapi Anda bisa alias ini dengan mudah jika Anda suka.

Dan aptitudedapat membantu juga:

$ aptitude search cheese
p   cheese                                                                       - tool to take pictures and videos from your webcam                                     
p   cheese:i386                                                                  - tool to take pictures and videos from your webcam                                     
p   cheese-common                                                                - Common files for the Cheese tool to take pictures and videos                          
v   cheese-common:i386                                                           -                                                                                       
p   gir1.2-cheese-3.0                                                            - tool to take pictures and videos from your webcam - gir bindings                      
p   gir1.2-cheese-3.0:i386                                                       - tool to take pictures and videos from your webcam - gir bindings                      
p   libcheese-dev                                                                - tool to take pictures and videos from your webcam - base dev                          
p   libcheese-dev:i386                                                           - tool to take pictures and videos from your webcam - base dev                          
p   libcheese-doc                                                                - tool to take pictures and videos from your webcam - documentation                     
p   libcheese-gtk-dev                                                            - tool to take pictures and videos from your webcam - widgets dev                       
p   libcheese-gtk-dev:i386                                                       - tool to take pictures and videos from your webcam - widgets dev                       
p   libcheese-gtk23                                                              - tool to take pictures and videos from your webcam - widgets                           
p   libcheese-gtk23:i386                                                         - tool to take pictures and videos from your webcam - widgets                           
p   libcheese7                                                                   - tool to take pictures and videos from your webcam - base library                      
p   libcheese7:i386                                                              - tool to take pictures and videos from your webcam - base library