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I'm out of space, my system and storage have been running slowly lately. The harddisk LED seems to be on continuously.
My root partition is 8Gb, with 2.7Gb free space. But when I boot from live-cd, decrypt my root storage then sort all the files and open properties I see only 3.9Gb total. But the free space is still 2.7Gb.
What is happening? Where is my free disk space gone? Do I need to defrag, to clean, to shrink or do something on my root storage? This always happens a few months after I do a clean install of my system.
lbtusr@lbtusr-system:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 1,5G 0 1,5G 0% /dev
tmpfs 295M 4,6M 291M 2% /run
/dev/mapper/lubuntu--vg-root 7,4G 4,5G 2,6G 64% /
tmpfs 1,5G 76K 1,5G 1% /dev/shm
tmpfs 5,0M 0 5,0M 0% /run/lock
tmpfs 1,5G 0 1,5G 0% /sys/fs/cgroup
tmpfs 2,0G 0 2,0G 0% /var/tmp
tmpfs 2,0G 4,0K 2,0G 1% /tmp
/dev/sda1 472M 181M 267M 41% /boot
/dev/mapper/vhm-lhm 3,9G 2,1G 1,7G 56% /home
tmpfs 295M 12K 295M 1% /run/user/1000
/home/lbtusr/.Private 3,9G 2,1G 1,7G 56% /home/lbtusr
lbtusr@lbtusr-system:~$ sudo du -sh /
[sudo] password for lbtusr: