Voici:
[root@linux fedorax]# du --exclude="/home" -x -h -a / | sort -r -h | head -30
17G /
8,1G /usr
7,9G /var
3,2G /usr/share
3,1G /usr/lib64
2,6G /var/cache
2,2G /var/lib
2,1G /var/log
2,1G /var/cache/PackageKit
2,0G /var/log/journal/d0550a2ccd354073a83685dfd4e622f6
2,0G /var/log/journal
1,8G /var/lib/flatpak/repo/objects
1,8G /var/lib/flatpak/repo
1,8G /var/lib/flatpak
1,7G /var/cache/PackageKit/25
1,6G /var/cache/PackageKit/25/metadata
1,5G /var/cache/PackageKit/25/metadata/updates/packages
1,5G /var/cache/PackageKit/25/metadata/updates
1,4G /usr/lib
1,2G /var/spool
1,1G /var/spool/abrt/ccpp-2017-10-10-22:06:14.820849-1563/coredump
1,1G /var/spool/abrt/ccpp-2017-10-10-22:06:14.820849-1563
1,1G /var/spool/abrt
644M /usr/share/locale
466M /opt
406M /var/cache/PackageKit/26
398M /usr/lib64/chromium-browser
383M /opt/wine-stable
355M /usr/lib64/libreoffice
319M /var/cache/PackageKit/26/metadata
[root@linux fedorax]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=4015324k,nr_inodes=1003831,mode=755)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)
cgroup on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime,seclabel)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/nvme0n1p2 on / type ext4 (rw,relatime,seclabel,data=ordered)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
debugfs on /sys/kernel/debug type debugfs (rw,relatime,seclabel)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=45,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1624)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,seclabel)
/dev/nvme0n1p4 on /home type ext4 (rw,relatime,seclabel,data=ordered)
/dev/nvme0n1p1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=ascii,shortname=winnt,errors=remount-ro)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/42 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=805412k,mode=700,uid=42,gid=42)
tmpfs on /run/user/1002 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=805412k,mode=700,uid=1002,gid=1002)
gvfsd-fuse on /run/user/1002/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1002,group_id=1002)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime,seclabel)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=805412k,mode=700)
Merci!