I get a permission error trying to find the filesystem type of a block device:

$ file -s /dev/sdd1
/dev/sdd1: no read permission

However, If I open gnome-disks, it will happily tell me info all the info about /dev/sdd1 that I want. I checked that gnome-disks is running as my user which does not have read access to /dev/sdd1. So my question is:

How can I find the filesystem type of /dev/sdd1 without read permission to the device?


The df command can give you that info.

df -T /dev/sdd1

udisksctl info -b /dev/sdd1

correctly identifies the system as crypto_LUKS.

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