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I want to find out the last time a filesystem was mounted on Linux (Debian). Any help?

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up vote 3 down vote accepted

Update: well that was too easy

$ sudo tune2fs -l /dev/sda1
tune2fs 1.41.11 (14-Mar-2010)
Last mounted on:          /
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              7028736
Filesystem created:       Sat Nov 14 20:49:49 2009
Last mount time:          Wed Jun  9 18:19:42 2010
Last write time:          Thu Jun  3 09:38:18 2010
Mount count:              20
Maximum mount count:      32

and tune2fs handles ext4 partitions too, I just don't have one handy.

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This works only for ext* and requires root privilege. I'm looking for this answer but for anykind of FS (local, NFS, etc). – Benoît Oct 9 '13 at 10:30
@Benoît then you should probably ask a new question instead of commenting on a answer from 3 years ago. – msw Oct 9 '13 at 13:28

I've just found a way for NFS by reading /proc/self/mountstats (or any other PID). It gives the age in seconds:

device mounted on /mnt/HOME with fstype nfs statvers=1.1
    age:    1047998
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