system mounts /dev/loop0 on /snap/core/3604 and it's 100% full, where is it coming from? [duplicate]
Solution 1:
and it's always 100% full
That is normal. /dev/loopX
are virtual devices to mount image files. And they are -read only- so do not get larger or smaller than they are when created.
Those mount points are connected to the snapd
service. You will see extra loop devices added for every software you install using "snap". Libreoffice has a snap, VLC has one.
From my system:
rinzwind@schijfwereld:~$ df -H
Filesystem Size Used Avail Use% Mounted on
...
/dev/loop0 88M 88M 0 100% /snap/core/3440
/dev/loop2 88M 88M 0 100% /snap/core/3604
/dev/loop1 204M 204M 0 100% /snap/vlc/65
/dev/loop3 88M 88M 0 100% /snap/core/3247
/dev/loop4 121M 121M 0 100% /snap/vlc/4
I have installed VLC from a snap install so I have 2 extra named "vlc". "core" is used for snapd itself. Remove the service and those loop devices disappear with it (sudo apt purge snapd ubuntu-core-launcher squashfs-tools
would remove it; but I would leave it as is if I was you).
++++++++++++++++++++++++++ additional info:
maximum@maxipc:~$ systemctl status snap-core-3604.mount
● snap-core-3604.mount - Mount unit for core
Loaded: loaded (/etc/systemd/system/snap-core-3604.mount; enabled; vendor pre
Active: active (mounted) since Wed 2017-12-27 15:44:36 EST; 2min 6s ago
Where: /snap/core/3604
What: /dev/loop0
Process: 838 ExecMount=/bin/mount /var/lib/snapd/snaps/core_3604.snap /snap/co
Dec 27 15:44:36 maxipc systemd[1]: Mounting Mount unit for core...
Dec 27 15:44:36 maxipc systemd[1]: Mounted Mount unit for core.