I've been researching and I can't find these files to do a clean up.
The disk with the issues is /dev/sdc2 where I've installed the SO. It's a 128GB Nvme disk and I'm using just 17GB. I just installed Ubuntu server 20.04 plus a software that is creating some .db files but nothing so big.
I can access this machine only by SSH.
$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 16G 0 16G 0% /dev
tmpfs 3.2G 83M 3.1G 3% /run
/dev/sdc2 117G 116G 0 100% /
tmpfs 16G 0 16G 0% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sdb 17T 17T 138G 100% /mnt/hdd02
/dev/nvme0n1 3.5T 5.3G 3.5T 1% /mnt/ssd
/dev/sdc1 511M 7.9M 504M 2% /boot/efi
/dev/sdd2 7.3T 3.6T 3.8T 49% /mnt/hdd04
/dev/sde2 7.3T 4.6T 2.8T 63% /mnt/hdd05
/dev/sda2 15T 15T 0 100% /mnt/hdd01
/dev/sdf2 7.3T 7.3T 11M 100% /mnt/hdd06
/dev/sdg2 7.3T 4.7T 2.7T 64% /mnt/hdd07
/dev/sdh2 7.3T 5.7T 1.7T 78% /mnt/hdd08
/dev/sdi2 7.3T 4.2T 3.2T 58% /mnt/hdd09
/dev/sdj2 7.3T 3.9T 3.5T 54% /mnt/hdd10
/dev/sdk2 7.3T 3.7T 3.7T 51% /mnt/hdd11
/dev/sdl2 7.3T 3.8T 3.6T 52% /mnt/hdd12
/dev/sdm2 7.3T 4.2T 3.2T 58% /mnt/hdd13
/dev/sdo2 7.3T 5.7T 1.7T 78% /mnt/hdd15
/dev/sdn2 7.3T 3.5T 3.9T 48% /mnt/hdd14
/dev/sdq2 7.3T 4.0T 3.4T 55% /mnt/hdd17
/dev/sdp2 7.3T 4.6T 2.8T 63% /mnt/hdd16
/dev/sdr2 7.3T 3.9T 3.5T 54% /mnt/hdd18
/dev/sds2 7.3T 4.3T 3.1T 59% /mnt/hdd19
tmpfs 3.2G 8.0K 3.2G 1% /run/user/1000
sudo du -ahd1 | sort -h
du: cannot access './run/user/1000/gvfs': Permission denied
du: cannot access './mnt/ssd/plot-k32-2021-07-01-23-18-8b5867b65906407b53de3e23620d96179c5c3b84adb62f34ab14d4fb2ed4c3c9.p1.table4.tmp': Input/output error
du: cannot access './proc/8024/task/8024/fd/4': No such file or directory
du: cannot access './proc/8024/task/8024/fdinfo/4': No such file or directory
du: cannot access './proc/8024/fd/3': No such file or directory
du: cannot access './proc/8024/fdinfo/3': No such file or directory
0 ./bin
0 ./dev
0 ./lib
0 ./lib32
0 ./lib64
0 ./libx32
0 ./proc
0 ./sbin
0 ./sys
4.0K ./cdrom
4.0K ./opt
4.0K ./srv
8.0K ./media
24K ./tmp
96K ./root
12M ./etc
83M ./run
150M ./boot
405M ./var
3.4G ./usr
13G ./home
102T .
102T ./mnt
$ lsof|grep deleted|awk '{print $2}'|xargs kill -9
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
Output information may be incomplete.
I've used ncdu as well but the results are the same.