In linux, given a path to a file, is there any way to tell which filesystem it is on?
Specifically, I'm trying to figure out how much space is left on the drive that /home/itsadok/bananas is in. From df I can see how much space is left on the various mounted drives, but it's a hard to figure out which of them is relevant.
By the way, I want to do this from a script, so educated guesses are not allowed.
Run
df -k /home/itsadok/bananas
(-k for size in kilobytes, you can ignore it if you don't want it)
This will give you the size left for only the filesystem containing the file, at least on AIX.
-h option for human-readable sizes
df -k $(dirname /home/itsadok/bananas) (or use backticks instead of $( ))
Oct 29, 2009 at 11:21
I was playing around with df after reading this question and I think this might be of help to someone:
To get it in a script, you have to remove the title line, that is, just keep the output line which has the text /dev/sda1. So I did this:
$ df -h . | grep dev
which gave me this:
/dev/sda1 41G 3.6G 36G 10% /
And to get the 36G part, i did this:
$ df -h . | grep dev | cut -d' ' -f20
Playing around with cut gives the other parts also:
$ df -h . | grep dev | cut -d' ' -f1 /dev/sda1
As itsadok points out below, awk is better for this purpose since a change in number of spaces and/or field widths will break a cut based solution.
So this is better:
$ df -h . | grep dev | awk '{print $4}'
36G
cut seems a little fragile for this purpose, I think the numbers won't with different drive sizes. I would use awk '{print $3}' instead.
Since this is in a script:
stat -fc '%a * %S' -- "$fname" |bc
