root@debian:~# # Итак, ставим xfwm4
root@debian:~# aptitude -R install xfwm4
The following NEW packages will be installed:
  libwnck-common{a} libwnck22{a} libxfce4ui-1-0{a} libxfce4util-common{a}
  libxfce4util6{a} libxfconf-0-2{a} libxres1{a} xfce-keyboard-shortcuts{a}
  xfconf{a} xfwm4
The following packages are RECOMMENDED but will NOT be installed:
  libxfce4util-bin
0 packages upgraded, 10 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,633 kB of archives. After unpacking 7,338 kB will be used.
Do you want to continue? [Y/n/?]
Get: 1 http://http.debian.net/debian/ jessie/main libxfce4util-common all 4.10.1-2 [92.2 kB]
Get: 2 http://http.debian.net/debian/ jessie/main libxfce4util6 i386 4.10.1-2 [72.8 kB]
Get: 3 http://http.debian.net/debian/ jessie/main xfconf i386 4.10.0-3 [140 kB]
Get: 4 http://http.debian.net/debian/ jessie/main libxfconf-0-2 i386 4.10.0-3 [81.4 kB]
Get: 5 http://http.debian.net/debian/ jessie/main xfce-keyboard-shortcuts all 4.10.0-6 [41.2 kB]
Get: 6 http://http.debian.net/debian/ jessie/main libxfce4ui-1-0 i386 4.10.0-6 [147 kB]
Get: 7 http://http.debian.net/debian/ jessie/main libxres1 i386 2:1.0.7-1+b1 [15.6 kB]
Get: 8 http://http.debian.net/debian/ jessie/main libwnck-common all 2.30.7-2 [223 kB]
Get: 9 http://http.debian.net/debian/ jessie/main libwnck22 i386 2.30.7-2 [123 kB]
Get: 10 http://http.debian.net/debian/ jessie/main xfwm4 i386 4.10.1-3 [696 kB]
Fetched 1,633 kB in 7s (227 kB/s)
Selecting previously unselected package libxfce4util-common.
(Reading database ... 122101 files and directories currently installed.)
Preparing to unpack .../libxfce4util-common_4.10.1-2_all.deb ...
Unpacking libxfce4util-common (4.10.1-2) ...
Selecting previously unselected package libxfce4util6.
Preparing to unpack .../libxfce4util6_4.10.1-2_i386.deb ...
Unpacking libxfce4util6 (4.10.1-2) ...
Selecting previously unselected package xfconf.
Preparing to unpack .../xfconf_4.10.0-3_i386.deb ...
Unpacking xfconf (4.10.0-3) ...
Selecting previously unselected package libxfconf-0-2.
Preparing to unpack .../libxfconf-0-2_4.10.0-3_i386.deb ...
Unpacking libxfconf-0-2 (4.10.0-3) ...
Selecting previously unselected package xfce-keyboard-shortcuts.
Preparing to unpack .../xfce-keyboard-shortcuts_4.10.0-6_all.deb ...
Unpacking xfce-keyboard-shortcuts (4.10.0-6) ...
Selecting previously unselected package libxfce4ui-1-0.
Preparing to unpack .../libxfce4ui-1-0_4.10.0-6_i386.deb ...
Unpacking libxfce4ui-1-0 (4.10.0-6) ...
Selecting previously unselected package libxres1:i386.
Preparing to unpack .../libxres1_2%3a1.0.7-1+b1_i386.deb ...
Unpacking libxres1:i386 (2:1.0.7-1+b1) ...
Selecting previously unselected package libwnck-common.
Preparing to unpack .../libwnck-common_2.30.7-2_all.deb ...
Unpacking libwnck-common (2.30.7-2) ...
Selecting previously unselected package libwnck22.
Preparing to unpack .../libwnck22_2.30.7-2_i386.deb ...
Unpacking libwnck22 (2.30.7-2) ...
Selecting previously unselected package xfwm4.
Preparing to unpack .../xfwm4_4.10.1-3_i386.deb ...
Unpacking xfwm4 (4.10.1-3) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for menu (2.1.47) ...
Processing triggers for mime-support (3.58) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Setting up libxfce4util-common (4.10.1-2) ...
Setting up libxfce4util6 (4.10.1-2) ...
Setting up xfconf (4.10.0-3) ...
Setting up libxfconf-0-2 (4.10.0-3) ...
Setting up xfce-keyboard-shortcuts (4.10.0-6) ...
Setting up libxfce4ui-1-0 (4.10.0-6) ...
Setting up libxres1:i386 (2:1.0.7-1+b1) ...
Setting up libwnck-common (2.30.7-2) ...
Setting up libwnck22 (2.30.7-2) ...
Setting up xfwm4 (4.10.1-3) ...
update-alternatives: using /usr/bin/xfwm4 to provide /usr/bin/x-window-manager (x-window-manager) in auto mode
Processing triggers for libc-bin (2.19-18) ...
Processing triggers for menu (2.1.47) ...

root@debian:~# aptitude show libxres1
Package: libxres1
State: installed
Automatically installed: yes
Multi-Arch: same
Version: 2:1.0.7-1+b1
Priority: optional
Section: libs
Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
Architecture: i386
Uncompressed Size: 22.5 k
Depends: libc6 (>= 2.4), libx11-6 (>= 2:1.6.0), libxext6
PreDepends: multiarch-support
Description: X11 Resource extension library
 libXRes provides an X Window System client interface to the Resource extension
 to the X protocol.

 The Resource extension allows for X clients to see and monitor the X resource
 usage of various clients (pixmaps, et al).

 More information about X.Org can be found at: <URL:http://www.X.org>

 This module can be found at git://anongit.freedesktop.org/git/xorg/lib/libXRes

Tags: role::shared-lib, x11::library

root@debian:~# # Как видим, флаг "авто" есть
root@debian:~# # Теперь удалим
root@debian:~# aptitude purge xfwm4
The following packages will be REMOVED:
  xfwm4{p}
0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 2,221 kB will be freed.
Do you want to continue? [Y/n/?]
(Reading database ... 123000 files and directories currently installed.)
Removing xfwm4 (4.10.1-3) ...
update-alternatives: using /usr/bin/kwin to provide /usr/bin/x-window-manager (x-window-manager) in auto mode
Purging configuration files for xfwm4 (4.10.1-3) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for mime-support (3.58) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for menu (2.1.47) ...

root@debian:~# # Проверям флаг...
root@debian:~# aptitude show libxres1
Package: libxres1
State: installed
Automatically installed: no
Multi-Arch: same
Version: 2:1.0.7-1+b1
Priority: optional
Section: libs
Maintainer: Debian X Strike Force <debian-x@lists.debian.org>
Architecture: i386
Uncompressed Size: 22.5 k
Depends: libc6 (>= 2.4), libx11-6 (>= 2:1.6.0), libxext6
PreDepends: multiarch-support
Description: X11 Resource extension library
 libXRes provides an X Window System client interface to the Resource extension
 to the X protocol.

 The Resource extension allows for X clients to see and monitor the X resource
 usage of various clients (pixmaps, et al).

 More information about X.Org can be found at: <URL:http://www.X.org>

 This module can be found at git://anongit.freedesktop.org/git/xorg/lib/libXRes

Tags: role::shared-lib, x11::library

root@debian:~# # Опаньки. Флага нет. Ну да ладно. Помнит ли об этих пакетах aptitude?
root@debian:~# aptitude -f install
The following packages will be REMOVED:
  libwnck-common{u} libwnck22{u} libxfce4ui-1-0{u} libxfce4util-common{u}
  libxfce4util6{u} libxfconf-0-2{u} libxres1{u} xfce-keyboard-shortcuts{u}
  xfconf{u}
0 packages upgraded, 0 newly installed, 9 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 5,117 kB will be freed.
Do you want to continue? [Y/n/?] n
Abort.
root@debian:~# # Помнит. Хорошо, снова установим и удалим xfwm4.
root@debian:~# aptitude -R install xfwm4                                        The following NEW packages will be installed:
  xfwm4
0 packages upgraded, 1 newly installed, 0 to remove and 74 not upgraded.
Need to get 0 B/696 kB of archives. After unpacking 2,221 kB will be used.
Selecting previously unselected package xfwm4.
(Reading database ... 122408 files and directories currently installed.)
Preparing to unpack .../xfwm4_4.10.1-3_i386.deb ...
Unpacking xfwm4 (4.10.1-3) ...
Processing triggers for menu (2.1.47) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for mime-support (3.58) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Setting up xfwm4 (4.10.1-3) ...
update-alternatives: using /usr/bin/xfwm4 to provide /usr/bin/x-window-manager (x-window-manager) in auto mode
Processing triggers for menu (2.1.47) ...

root@debian:~# aptitude purge xfwm4The following packages will be REMOVED:
  xfwm4{p}
0 packages upgraded, 0 newly installed, 1 to remove and 74 not upgraded.
Need to get 0 B of archives. After unpacking 2,221 kB will be freed.
Do you want to continue? [Y/n/?]
(Reading database ... 123000 files and directories currently installed.)
Removing xfwm4 (4.10.1-3) ...
update-alternatives: using /usr/bin/kwin to provide /usr/bin/x-window-manager (x-window-manager) in auto mode
Purging configuration files for xfwm4 (4.10.1-3) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for mime-support (3.58) ...
Processing triggers for man-db (2.7.0.2-5) ...
Processing triggers for menu (2.1.47) ...

root@debian:~# # aptitude всё ещё помнит об этих пакетах?
root@debian:~# aptitude -f install
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 74 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.

root@debian:~# # Опаньки №2. Повторная установка и удаление xfwm4 - и aptitude забыл об установленных за компанию пакетах, которые отныне останутся мусором в системе.
root@debian:~#