D’une certaine manière, on peut dire que ça a marché…
Je vais juste éviter pour l’instant de quitter ma session courante ou même mon xterm, vu que ça a tout désinstallé… 
apt-get install libc6=2.7-18
Lecture des listes de paquets… Fait
Construction de l’arbre des dépendances
Lecture des informations d’état… Fait
Les paquets suivants ont été installés automatiquement et ne sont plus nécessaires :
libfreebob0 libtalloc1 libglib-perl bzip2 shared-mime-info libenchant1c2a libxfce4mcs-client3 libgnomevfs2-0 liblcms1
libmalaga7 libgnome2-0 xfonts-scalable gamin libgtop2-common libraw1394-8 libiec61883-0 libsoundtouch1c2 libvorbisfile3
libgnomeui-common libgnome-keyring0 liburi-perl libart-2.0-2 libavahi-common-data libdbus-glib-1-2 x11-xfs-utils libjack0
x11-xserver-utils scrollkeeper docbook-xml libpam-gnome-keyring libglu1-mesa libx86-1 libbonoboui2-common gconf2 xauth
libwnck-common libxslt1.1 libflac++6 libnspr4-0d esound-common libsmbios2 libdirectfb-extra libvorbisenc2 linux-libc-dev
xml-core libxmuu1 libgnome-menu2 python-minimal libpaper-utils libsmbclient libxfce4util4 libxxf86misc1 libgamin0
libsmbios-bin libeel2-data vbetool libgconf2-4 libxres1 xbitmaps libgnome2-common powermgmt-base libstartup-notification0
libxxf86dga1 libhunspell-1.2-0 libavc1394-0 hal libgnome2-vfs-perl libesd0 xfce4-icon-theme python sudo deborphan
libwxbase2.6-0 libgsf-1-common libcroco3 libhal-storage1 lpr libidl0 libxml2 libbonobo2-0 libxtrap6 pm-utils libasound2
libflac8 xinit libaudiofile0 x11-session-utils libgnomecanvas2-common sgml-base libwbclient0 thunar-data libfs6 gettext-base
libgnomevfs2-extra gconf2-common uswsusp libgtop2-7 libmozjs1d xli psutils libxtst6 gnome-mime-data libavahi-client3
xorg-docs liborbit2 libcupsimage2 libbonobo2-common sgml-data libmad0 myspell-en-us libid3tag0 radeontool libvoikko1
libavahi-glib1 hal-info libxfce4mcs-manager3 libexif12 esound-clients libcupsys2 libvorbis0a libsplashy1 libjpeg-progs
libavahi-common3 desktop-file-utils libxv1 portmap libvte-common xfdesktop4-data libscrollkeeper0 libnss3-1d libsndfile1
libgsf-1-114 libpaper1 libgnomevfs2-common wdiff libogg0
Veuillez utiliser « apt-get autoremove » pour les supprimer.
Paquets suggérés :
glibc-doc
Les paquets suivants seront ENLEVÉS :
a2ps audacity defoma desktop-base exo-utils file fontconfig fontconfig-config ghostscript gksu gnome-keyring gnome-mount
gs-common gsfonts gtk2-engines-xfce iceweasel language-env libbonoboui2-0 libc6-i686 libcairo-perl libcairo2 libeel2-2.20
libexo-0.3-0 libfontconfig1 libgail-common libgail18 libgksu2-0 libglade2-0 libgnome2-canvas-perl libgnome2-perl
libgnomecanvas2-0 libgnomeui-0 libgs8 libgtk2-perl libgtk2.0-0 libgtk2.0-bin libmagic1 libnautilus-extension1 libnotify1
libpango1.0-0 libpango1.0-common librsvg2-2 librsvg2-common libsexy2 libthunar-vfs-1-2 libvte9 libwnck22 libwxgtk2.6-0
libxfcegui4-4 libxft2 locales lynx lynx-cur notification-daemon orage psfontmgr synaptic thunar ttf-dejavu ttf-dejavu-core
ttf-dejavu-extra vim-gtk x-ttcidfont-conf x11-apps x11-utils xbase-clients xdm xfce4 xfce4-mcs-manager xfce4-mcs-plugins
xfce4-mixer xfce4-mixer-alsa xfce4-panel xfce4-session xfce4-terminal xfce4-utils xfdesktop4 xfprint4 xfwm4 xfwm4-themes xorg
xscreensaver xscreensaver-data xterm xulrunner-1.9
Les paquets suivants seront mis à une VERSION INFÉRIEURE :
libc6
0 mis à jour, 0 nouvellement installés, 1 remis à une version inférieure, 85 à enlever et 1 non mis à jour.
Il est nécessaire de prendre 0o/4438ko dans les archives.
Après cette opération, 183Mo d’espace disque seront libérés.
Souhaitez-vous continuer [O/n] ?
Préconfiguration des paquets…
(Lecture de la base de données… 39844 fichiers et répertoires déjà installés.)
Suppression de xfprint4 …
Suppression de a2ps …
Suppression de audacity …
Suppression de psfontmgr …
Purging font configuration of psfontmgr…
Purging category postscript…
Purging category xfont…
Purging category type1…
Purging category pspreview…
Suppression de x-ttcidfont-conf …
Purging font configuration of x-ttcidfont-conf…
Purging category cmap…
Purging category cid…
Purging category truetype…
Suppression de xscreensaver …
Suppression de xfwm4-themes …
Suppression de xfce4 …
Suppression de xfwm4 …
Suppression de xfdesktop4 …
Suppression de xfce4-utils …
Suppression de xfce4-session …
Suppression de xfce4-mixer …
Suppression de orage …
Suppression de xfce4-panel …
Suppression de xfce4-mixer-alsa …
Suppression de xfce4-mcs-plugins …
Suppression de xfce4-mcs-manager …
Suppression de vim-gtk …
Suppression de thunar …
Suppression de xfce4-terminal …
Suppression de exo-utils …
Suppression de libxfcegui4-4 …
Suppression de libthunar-vfs-1-2 …
Suppression de libexo-0.3-0 …
Suppression de gtk2-engines-xfce …
Suppression de iceweasel …
Suppression de xulrunner-1.9 …
Suppression de libwxgtk2.6-0 …
Suppression de synaptic …
Suppression de libgnome2-perl …
Suppression de libgnome2-canvas-perl …
Suppression de libgtk2-perl …
Suppression de gnome-mount …
Suppression de notification-daemon …
Suppression de libsexy2 …
Suppression de gksu …
Suppression de gnome-keyring …
Suppression de libgksu2-0 …
Suppression de libeel2-2.20 …
Suppression de libvte9 …
Suppression de libwnck22 …
Suppression de libnotify1 …
Suppression de desktop-base …
Updating /boot/grub/grub.cfg …
Found linux image: /boot/vmlinuz-2.6.26-2-686
Found initrd image: /boot/initrd.img-2.6.26-2-686
done
Suppression de librsvg2-common …
Suppression de librsvg2-2 …
Suppression de libgnomeui-0 …
Suppression de libbonoboui2-0 …
Suppression de libgnomecanvas2-0 …
Suppression de libgail-common …
Suppression de libgail18 …
Suppression de libglade2-0 …
Suppression de xscreensaver-data …
Suppression de libgtk2.0-bin …
Suppression de libnautilus-extension1 …
Suppression de libgtk2.0-0 …
Suppression de libpango1.0-0 …
Suppression de libpango1.0-common …
Purging font configuration of pango…
Purging category xfont…
Suppression de fontconfig …
Purging font configuration of fontconfig…
Purging category cid…
Purging category truetype…
Purging category type1…
Updating fontconfig cache for /usr/share/fonts/truetype/ttf-dejavu /usr/share/fonts/type1/gsfonts
Updating fontconfig cache for /usr/share/fonts/truetype/ttf-dejavu /usr/share/fonts/type1/gsfonts
Suppression de xorg …
Suppression de xterm …
Suppression de xdm …
Suppression de xbase-clients …
Suppression de x11-utils …
Suppression de libcairo-perl …
Suppression de libcairo2 …
Suppression de x11-apps …
Suppression de libxft2 …
Suppression de language-env …
Suppression de libc6-i686 …
Suppression de locales …
Suppression de lynx …
Suppression de lynx-cur …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
Suppression de ghostscript …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
Purging font configuration of gs…
Purging category psprint…
Purging category cmap…
Purging category cid…
Purging category truetype…
Purging category gsfontderivative…
Purging category type3…
Purging category type1…
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
Suppression de gs-common …
Suppression de gsfonts …
Unregistering PostScript fonts…
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
done.
Suppression de libgs8 …
Suppression de libfontconfig1 …
Suppression de fontconfig-config …
Suppression de ttf-dejavu …
Suppression de ttf-dejavu-extra …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
Suppression de ttf-dejavu-core …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
Suppression de defoma …
Suppression de file …
Suppression de libmagic1 …
Traitement des actions différées (« triggers ») pour « menu »…
Traitement des actions différées (« triggers ») pour « man-db »…
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
/usr/bin/mandb: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
Traitement des actions différées (« triggers ») pour « libc6 »…
ldconfig deferred processing now taking place
Selecting previously deselected package libc6.
(Reading database … 28737 files and directories currently installed.)
Preparing to replace libc6 2.9-4ubuntu6 (using …/archives/libc6_2.7-18_i386.deb) …
Unpacking replacement libc6 …
Processing triggers for man-db …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
/usr/bin/mandb: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
Setting up libc6 (2.7-18) …
Installing new version of config file /etc/init.d/glibc.sh …
Installing new version of config file /etc/gai.conf …
ligux:/mnt/winC# apt-get install libc6-dev
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages were automatically installed and are no longer required:
libkeyutils1 libgtk2.0-common libfreebob0 libatk1.0-0 libts-0.0-0 libtalloc1 libglib-perl bzip2 shared-mime-info
libenchant1c2a libxfce4mcs-client3 libgnomevfs2-0 libxcb-render-util0 liblcms1 libmalaga7 libgnome2-0 xfonts-scalable
mime-support gamin libgtop2-common libraw1394-8 libiec61883-0 libsoundtouch1c2 libvorbisfile3 libgnomeui-common
libgnome-keyring0 liburi-perl libart-2.0-2 libavahi-common-data perl libdbus-glib-1-2 x11-xfs-utils libjack0
x11-xserver-utils scrollkeeper docbook-xml libpam-gnome-keyring libglu1-mesa libx86-1 libbonoboui2-common gconf2
vim-gui-common xauth libwnck-common libxslt1.1 libflac++6 libpcre3 libnspr4-0d esound-common libsqlite3-0 libsmbios2
libdirectfb-extra libvorbisenc2 xml-core libxmuu1 libgnome-menu2 python2.5 libxcb-render0 python-minimal libpaper-utils
hicolor-icon-theme libsmbclient libkrb53 libxfce4util4 libxxf86misc1 libgamin0 libsmbios-bin libdatrie0 libeel2-data
libdirectfb-1.0-0 vbetool libgconf2-4 libxres1 xbitmaps libgnome2-common powermgmt-base libstartup-notification0 libxxf86dga1
libhunspell-1.2-0 libcups2 libavc1394-0 hal libgnome2-vfs-perl libesd0 xfce4-icon-theme python sudo deborphan libwxbase2.6-0
libgsf-1-common libxcomposite1 libcroco3 libthai0 libhal-storage1 lpr libidl0 libxml2 libbonobo2-0 libxtrap6 pm-utils
libglib2.0-data libasound2 libatk1.0-data libflac8 libxrender1 xinit libaudiofile0 x11-session-utils libgnomecanvas2-common
sgml-base libwbclient0 ucf thunar-data libfs6 gettext-base libgnomevfs2-extra gconf2-common tcl8.4 libtiff4 perl-modules
uswsusp python2.5-minimal libgtop2-7 libmozjs1d libjpeg62 libperl5.10 xli libthai-data libxtst6 psutils gnome-mime-data
libavahi-client3 xorg-docs libglib2.0-0 liborbit2 libcupsimage2 vim-runtime libbonobo2-common dialog sgml-data libmad0
libdb4.5 myspell-en-us libsysfs2 libid3tag0 radeontool libvoikko1 libavahi-glib1 hal-info libxfce4mcs-manager3 libruby1.8
libexif12 esound-clients libcupsys2 libvorbis0a libsplashy1 libjpeg-progs libxcursor1 libavahi-common3 desktop-file-utils
libxinerama1 libxv1 portmap libvte-common xfdesktop4-data libscrollkeeper0 libxrandr2 libnss3-1d libsndfile1 libgsf-1-114
libpaper1 libgnomevfs2-common libogg0 wdiff
Use ‘apt-get autoremove’ to remove them.
Suggested packages:
glibc-doc manpages-dev
The following NEW packages will be installed:
libc6-dev
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 3377kB of archives.
After this operation, 13.3MB of additional disk space will be used.
Get:1 ftp.fr.debian.org lenny/main libc6-dev 2.7-18 [3377kB]
Fetched 3377kB in 16s (204kB/s)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Selecting previously deselected package libc6-dev.
(Reading database … 28728 files and directories currently installed.)
Unpacking libc6-dev (from …/libc6-dev_2.7-18_i386.deb) …
Processing triggers for man-db …
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).
/usr/bin/mandb: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
manconv: can’t set the locale; make sure $LC_* and $LANG are correct
Setting up libc6-dev (2.7-18) …
…
les sources de dépôt ubuntu (que j’avais à disposition sur une autre partition) pour télécharger lynx…
Et même dangereux…