du for / and mt pts

I need to find out the size of each file under root (/) and its sub dir  as well as any other mt pts

I have tried like these:

du -m / |sort +0rn
du -m . |sort +0rn

but, they don't give me what I need.

thx

ethanjohnsonsAsked:
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sjm_eeCommented:
The size of each file in *whole* directory tree? Well, "find / -ls" will need some parsing but it is all there. Better is to install the "gnu" find, and then use "find / -printf ...".
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ethanjohnsonsAuthor Commented:
this ( find / -ls |sort +4nr |more ) would be what I need as long as I can exclude certain dirs i.e. /proc.

find: 0652-023 Cannot open file /proc/491944.
sort: 0653-657 A write error occurred while sorting.

thx

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JulieBouillonCommented:
If you just want to get rid of the error messages, then you can use:
find / -ls 2>/dev/null | sort +4nr | more
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ethanjohnsonsAuthor Commented:
thx much
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