Mais la solution de tout virer me semble pour l'instant prématuré, puis j'aimerai bien comprendre ce qui c'est passé.
J'ai ce soucis suite à la tentative d'installer Gimp 10.2.4 , je ne pense pas qu'il y ai un lien mais j'ai du faire une mauvaise manœuvre, ou bien les manipulations on fait surgir le problème.
:~# du -xhd4 /var
4,0K /var/cache/dbconfig-common/backups
8,0K /var/cache/dbconfig-common
4,0K /var/cache/cups/rss
12M /var/cache/cups
4,0K /var/cache/PackageKit/downloads
8,0K /var/cache/PackageKit
4,0K /var/cache/tcpdf
2,4M /var/cache/fontconfig
76K /var/cache/ldconfig
24K /var/cache/man/en_CA
24K /var/cache/man/si
24K /var/cache/man/az
24K /var/cache/man/be
24K /var/cache/man/bs
24K /var/cache/man/zh_CN
24K /var/cache/man/id
24K /var/cache/man/th
24K /var/cache/man/lt
24K /var/cache/man/gd
24K /var/cache/man/fi
24K /var/cache/man/ast
24K /var/cache/man/eu
24K /var/cache/man/kk
24K /var/cache/man/my
24K /var/cache/man/ar
24K /var/cache/man/pa
24K /var/cache/man/fr_CA
24K /var/cache/man/se
24K /var/cache/man/fr.ISO8859-1
24K /var/cache/man/he
24K /var/cache/man/hy
24K /var/cache/man/io
24K /var/cache/man/eo
24K /var/cache/man/vi
32K /var/cache/man/ja
24K /var/cache/man/km
48K /var/cache/man/de
24K /var/cache/man/te
24K /var/cache/man/sq
24K /var/cache/man/ro
24K /var/cache/man/ug
24K /var/cache/man/uk
24K /var/cache/man/bg
24K /var/cache/man/en_AU
28K /var/cache/man/it
24K /var/cache/man/cs
24K /var/cache/man/hu
28K /var/cache/man/es
24K /var/cache/man/hr
24K /var/cache/man/bo
24K /var/cache/man/et
24K /var/cache/man/nl
24K /var/cache/man/zh_HK
24K /var/cache/man/ps
24K /var/cache/man/fa
24K /var/cache/man/ce
24K /var/cache/man/da
24K /var/cache/man/hi
24K /var/cache/man/mhr
24K /var/cache/man/ca
24K /var/cache/man/fo
24K /var/cache/man/cy
24K /var/cache/man/sl
24K /var/cache/man/sr
24K /var/cache/man/bn
24K /var/cache/man/uz
24K /var/cache/man/shn
24K /var/cache/man/lv
24K /var/cache/man/gl
32K /var/cache/man/ru
24K /var/cache/man/pt
24K /var/cache/man/fy
24K /var/cache/man/sk
24K /var/cache/man/tr
28K /var/cache/man/pl
24K /var/cache/man/ne
304K /var/cache/man/fr
24K /var/cache/man/oc
24K /var/cache/man/ko
24K /var/cache/man/fr.UTF-8
24K /var/cache/man/nn
24K /var/cache/man/ca@valencia
24K /var/cache/man/pt_BR
24K /var/cache/man/el
24K /var/cache/man/ku
24K /var/cache/man/nb
24K /var/cache/man/ta
24K /var/cache/man/zh_TW
24K /var/cache/man/ml
24K /var/cache/man/ms
24K /var/cache/man/en_GB
24K /var/cache/man/sv
2,9M /var/cache/man
4,0K /var/cache/realmd
5,9M /var/cache/debconf
1000K /var/cache/cracklib
4,0K /var/cache/apt/archives/partial
112K /var/cache/apt/archives
53M /var/cache/apt
1,9M /var/cache/app-info/gv
1,9M /var/cache/app-info
4,0K /var/cache/apache2/mod_cache_disk
8,0K /var/cache/apache2
4,0K /var/cache/gdm
48K /var/cache/dictionaries-common
8,0K /var/cache/system-tools-backends
79M /var/cache
80K /var/log/mysql
8,0K /var/log/dbconfig-common
56K /var/log/unattended-upgrades
80K /var/log/cups
4,0K /var/log/speech-dispatcher
15M /var/log/installer/cdebconf
17M /var/log/installer
4,0K /var/log/gdm3
280K /var/log/apt
4,0K /var/log/hp/tmp
8,0K /var/log/hp
3,6M /var/log/apache2
8,9G /var/log
4,0K /var/mail
4,0K /var/opt
16K /var/lost+found
8,0K /var/.Trash-0/files/tests
2,5M /var/.Trash-0/files
32K /var/.Trash-0/info
2,5M /var/.Trash-0
40K /var/www/html/tests/tp openclassroom
161M /var/www/html/tests/wordpress
162M /var/www/html/tests
162M /var/www/html
162M /var/www
16K /var/spool/anacron
4,0K /var/spool/rsyslog
4,0K /var/spool/cups/tmp
216K /var/spool/cups
4,0K /var/spool/libreoffice/uno_packages/cache
8,0K /var/spool/libreoffice/uno_packages
12K /var/spool/libreoffice
4,0K /var/spool/cron/crontabs
8,0K /var/spool/cron
260K /var/spool
2,8M /var/backups
4,0K /var/local
4,0K /var/lib/polkit-1/localauthority/50-local.d
4,0K /var/lib/polkit-1/localauthority/30-site.d
4,0K /var/lib/polkit-1/localauthority/20-org.d
4,0K /var/lib/polkit-1/localauthority/90-mandatory.d
24K /var/lib/polkit-1/localauthority/10-vendor.d
44K /var/lib/polkit-1/localauthority
48K /var/lib/polkit-1
4,0K /var/lib/dhcp
28K /var/lib/pam
4,0K /var/lib/man-db
1,2M /var/lib/mysql/mysql
336K /var/lib/mysql/test
13M /var/lib/mysql/wp_zanca
216K /var/lib/mysql/blog
8,0K /var/lib/mysql/performance_schema
2,1M /var/lib/mysql/phpmyadmin
189M /var/lib/mysql
12K /var/lib/sgml-base
8,0K /var/lib/dbus
4,0K /var/lib/php/sessions
44K /var/lib/php/modules/7.0
48K /var/lib/php/modules
56K /var/lib/php
4,0K /var/lib/avahi-autoipd
12K /var/lib/initramfs-tools
8,0K /var/lib/emacsen-common/state/package
8,0K /var/lib/emacsen-common/state/flavor
20K /var/lib/emacsen-common/state
24K /var/lib/emacsen-common
8,0K /var/lib/os-prober
12K /var/lib/flatpak/repo/refs
4,0K /var/lib/flatpak/repo/state
4,0K /var/lib/flatpak/repo/extensions
4,0K /var/lib/flatpak/repo/objects
9,8M /var/lib/flatpak/repo/tmp
9,8M /var/lib/flatpak/repo
9,8M /var/lib/flatpak
4,0K /var/lib/alsa
4,0K /var/lib/AccountsService/icons
12K /var/lib/AccountsService/users
20K /var/lib/AccountsService
200K /var/lib/ucf/cache
276K /var/lib/ucf
8,0K /var/lib/logrotate
108K /var/lib/PackageKit
4,0K /var/lib/openvpn/chroot/tmp
8,0K /var/lib/openvpn/chroot
12K /var/lib/openvpn
4,0K /var/lib/geoclue
48K /var/lib/NetworkManager
4,0K /var/lib/realmd
4,0K /var/lib/python
4,0K /var/lib/systemd/coredump
12K /var/lib/systemd/backlight
128K /var/lib/systemd/catalog
4,0K /var/lib/systemd/deb-systemd-helper-masked
4,0K /var/lib/systemd/timers
4,0K /var/lib/systemd/deb-systemd-helper-enabled/network-online.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/printer.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/bluetooth.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/sockets.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/sysinit.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/timers.target.wants
4,0K /var/lib/systemd/deb-systemd-helper-enabled/graphical.target.wants
208K /var/lib/systemd/deb-systemd-helper-enabled
8,0K /var/lib/systemd/rfkill
376K /var/lib/systemd
20K /var/lib/upower
4,0K /var/lib/misc
8,0K /var/lib/libreoffice/share/prereg
12K /var/lib/libreoffice/share
16K /var/lib/libreoffice
4,0K /var/lib/snmp
4,0K /var/lib/vim/addons
8,0K /var/lib/vim
4,0K /var/lib/colord/icc
4,0K /var/lib/colord/.cache
56K /var/lib/colord
22M /var/lib/aspell
8,0K /var/lib/xkb
8,0K /var/lib/xfonts
32K /var/lib/gdm3/.local/share
36K /var/lib/gdm3/.local
8,0K /var/lib/gdm3/.config/ibus
12K /var/lib/gdm3/.config/systemd
8,0K /var/lib/gdm3/.config/gnome-session
64K /var/lib/gdm3/.config/pulse
96K /var/lib/gdm3/.config
20K /var/lib/gdm3/.cache/fontconfig
40K /var/lib/gdm3/.cache
212K /var/lib/gdm3
4,0K /var/lib/apt/mirrors/partial
8,0K /var/lib/apt/mirrors
4,0K /var/lib/apt/lists/partial
120M /var/lib/apt/lists
4,0K /var/lib/apt/periodic
120M /var/lib/apt
548K /var/lib/usbutils
388K /var/lib/dpkg/alternatives
4,0K /var/lib/dpkg/parts
52K /var/lib/dpkg/triggers
4,0K /var/lib/dpkg/updates
60M /var/lib/dpkg/info
64M /var/lib/dpkg
8,0K /var/lib/security
20K /var/lib/ghostscript/CMap
12K /var/lib/ghostscript/fonts
36K /var/lib/ghostscript
4,0K /var/lib/udisks2
8,0K /var/lib/app-info/yaml
9,8M /var/lib/app-info/icons/debian-stretch-main
9,8M /var/lib/app-info/icons
9,9M /var/lib/app-info
4,0K /var/lib/usb_modeswitch
4,0K /var/lib/hp
4,0K /var/lib/phpmyadmin/tmp
12K /var/lib/phpmyadmin
8,0K /var/lib/ispell
4,0K /var/lib/adequate
4,0K /var/lib/apache2/site/enabled_by_admin
8,0K /var/lib/apache2/site
4,0K /var/lib/apache2/conf/disabled_by_admin
4,0K /var/lib/apache2/conf/enabled_by_maint
4,0K /var/lib/apache2/conf/disabled_by_maint
16K /var/lib/apache2/conf
4,0K /var/lib/apache2/module/enabled_by_maint
4,0K /var/lib/apache2/module/disabled_by_maint
12K /var/lib/apache2/module
40K /var/lib/apache2
332K /var/lib/gconf/defaults
4,0K /var/lib/gconf/debian.mandatory
4,0K /var/lib/gconf/debian.defaults
344K /var/lib/gconf
32K /var/lib/xml-core
12K /var/lib/dictionaries-common/wordlist
12K /var/lib/dictionaries-common/aspell
8,0K /var/lib/dictionaries-common/ispell
36K /var/lib/dictionaries-common
4,0K /var/lib/synaptic
415M /var/lib
4,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-rtkit-daemon.service-4QCync/tmp
8,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-rtkit-daemon.service-4QCync
4,0K /var/tmp/systemd-private-c7d6dd2bae894979a27964ac699c552c-systemd-timesyncd.service-KEaadA/tmp
8,0K /var/tmp/systemd-private-c7d6dd2bae894979a27964ac699c552c-systemd-timesyncd.service-KEaadA
4,0K /var/tmp/systemd-private-c00a899800d64116bb14dede01e4b2b3-apache2.service-VzG3vB/tmp
8,0K /var/tmp/systemd-private-c00a899800d64116bb14dede01e4b2b3-apache2.service-VzG3vB
4,0K /var/tmp/systemd-private-3ab8fd86568f41b3b7e63ea6081643cc-systemd-timesyncd.service-pL34hC/tmp
8,0K /var/tmp/systemd-private-3ab8fd86568f41b3b7e63ea6081643cc-systemd-timesyncd.service-pL34hC
4,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-systemd-timesyncd.service-V0lMSc/tmp
8,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-systemd-timesyncd.service-V0lMSc
4,0K /var/tmp/systemd-private-c00a899800d64116bb14dede01e4b2b3-systemd-timesyncd.service-kYghCg/tmp
8,0K /var/tmp/systemd-private-c00a899800d64116bb14dede01e4b2b3-systemd-timesyncd.service-kYghCg
4,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-colord.service-7oR4go/tmp
8,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-colord.service-7oR4go
4,0K /var/tmp/systemd-private-c7d6dd2bae894979a27964ac699c552c-systemd-hostnamed.service-daYtUI/tmp
8,0K /var/tmp/systemd-private-c7d6dd2bae894979a27964ac699c552c-systemd-hostnamed.service-daYtUI
4,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-rtkit-daemon.service-zZx5hR/tmp
8,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-rtkit-daemon.service-zZx5hR
4,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-colord.service-hsLmJ8/tmp
8,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-colord.service-hsLmJ8
4,0K /var/tmp/systemd-private-61cfd390090f427190284e4ca97cbd51-systemd-hostnamed.service-Za4w5c
4,0K /var/tmp/systemd-private-d0c849ea74924ec091087104658db3ae-colord.service-Av14up/tmp
8,0K /var/tmp/systemd-private-d0c849ea74924ec091087104658db3ae-colord.service-Av14up
4,0K /var/tmp/systemd-private-85c9a9b3c4ea4a44b5c2ad3fe9bb14ea-systemd-hostnamed.service-fvIoUs
4,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-systemd-timesyncd.service-wpny6E/tmp
8,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-systemd-timesyncd.service-wpny6E
4,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-colord.service-RqKNNd/tmp
8,0K /var/tmp/systemd-private-c7920824dbc74628ae0df14ebe6956f6-colord.service-RqKNNd
4,0K /var/tmp/systemd-private-61cfd390090f427190284e4ca97cbd51-systemd-hostnamed.service-Vbv6zT
4,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-systemd-timesyncd.service-6ZqBmr/tmp
8,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-systemd-timesyncd.service-6ZqBmr
4,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-apache2.service-KUjFmA/tmp
8,0K /var/tmp/systemd-private-78ba384a8f9f4b2880d9a3516806c16d-apache2.service-KUjFmA
4,0K /var/tmp/systemd-private-3bad173cfc9d463cab308b8c4095f8c3-systemd-hostnamed.service-xdbBvB/tmp
8,0K /var/tmp/systemd-private-3bad173cfc9d463cab308b8c4095f8c3-systemd-hostnamed.service-xdbBvB
4,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-rtkit-daemon.service-vyXNHn/tmp
8,0K /var/tmp/systemd-private-08a0eefe61b74364afbcd9a8ac97bde0-rtkit-daemon.service-vyXNHn
4,0K /var/tmp/systemd-private-3bad173cfc9d463cab308b8c4095f8c3-systemd-timesyncd.service-3ESE0m/tmp
8,0K /var/tmp/systemd-private-3bad173cfc9d463cab308b8c4095f8c3-systemd-timesyncd.service-3ESE0m
160K /var/tmp
9,6G /var