Самый быстрый способ прочитать справку о не установленной программе (я чувствую себя счастливой)

apt-cache show remind

apt-cache show remind | awk '/Description-en/ {print; a=1; next} a && /^ / {print; next} {a=0}'

apt-get download remind
dpkg -x *.deb remind
man ./remind/usr/share/man/man1/rem.1.gz

Пример вывода

apt-cache show remind

Package: remind
Priority: optional
Section: universe/utils
Installed-Size: 411
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Ana Beatriz Guerrero Lopez <ana@debian.org>
Architecture: i386
Version: 03.01.15-1
Depends: libc6 (>= 2.7)
Suggests: tkremind, wyrd
Filename: pool/universe/r/remind/remind_03.01.15-1_i386.deb
Size: 190964
MD5sum: e476e0b4e49a211ad860cde57b1b6ea5
SHA1: b342c7f05e560aecc3c7bac9aa1ae1fef424121c
SHA256: 67f34f03723e03653fc25d119b680da1ab03bf28fc78d80c2a173184cbf682bc
Description-en: sophisticated calendar and alarm program
 Remind allows you to remind yourself of upcoming events and
 appointments.  Each reminder or alarm can consist of a message sent
 to standard output, or a program to be executed.
 .
 It also features: sophisticated date calculation, moon phases,
 sunrise/sunset, Hebrew calendar, alarms, PostScript output, tcl/tk
 front-end and proper handling of holidays.
 .
 Reminders can be created by the remind scripting language or by using
 the graphical frontend package "tkremind".
Description-md5: 5b163d21d42fbc03e201fdb61071c10d
Homepage: http://www.roaringpenguin.com/products/remind/
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

apt-cache show remind | awk '/Description-en/ {print; a=1; next} a && /^ / {print; next} {a=0}'

Description-en: sophisticated calendar and alarm program
 Remind allows you to remind yourself of upcoming events and
 appointments.  Each reminder or alarm can consist of a message sent
 to standard output, or a program to be executed.
 .
 It also features: sophisticated date calculation, moon phases,
 sunrise/sunset, Hebrew calendar, alarms, PostScript output, tcl/tk
 front-end and proper handling of holidays.
 .
 Reminders can be created by the remind scripting language or by using
 the graphical frontend package "tkremind".