bdf | awk '{ sum += $2; } END { print sum; }' for total space in Megabytes ??

[Sammy_2]

bdf | awk '{ sum += $2; } END { print sum; }'
gives me 5.03521e+07

Not sure what that means. How can I get output in Megbytes ?

[James R. Ferguson · Accepted solution]

Hi Sammy:

This is simply scientific notation. This is 5.03521 times 10 raised to the 7th power:

50,352,100

To obtain megabytes (ideally) divide by 1024/1024 or:

# bdf | awk '{ sum += $2; } END { print sum/1024/1024; }'

Regards!

...JRF...

[James R. Ferguson]

Hi (again) Sammy:

I would also direct you to this article and its links which show that the terms 'mega', 'giga', etc. become imprecise as the magnitude of numbers increase. A acccurate terminology is 'mebi'byte, here:

http://en.wikipedia.org/wiki/Mebibyte

Regards!

...JRF...

[Sammy_2]

JRF, Thanks and it got what i needed. But, is it a typo or 1024/1024 in your solution would give you in GB as oppose to MB

[James R. Ferguson]

Hi Sammy:

Ooops, sorry, I'm thinking giga/gibi bytes :-)

NO POINTS PLEASE!

...JRF...

[James R. Ferguson]

Sammy:

Now that I have had coffee and lunch, after a long night, I would suggest you amend your formatting to round your values, too. The 'printf' function accomodates this. Too, I would also instruct 'awk' to skip the first record (the header line from 'bdf') as a cleaner implementation, although in this case there is no second field in the header.

# bdf | awk 'NR>1 {sum+=$2};END {printf "%5.0f MB\n",sum/1024}'

No points are necessary for what I ahould have added the first time!

Regards!

...JRF...

[Hein van den Heuvel]

Sammy,

If BDF does the job for you, then more power to you! However, several of us run into issues with it due to the bonus line-wrapping it does for long names.

See for example:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=542488

So you may want to build a serious script with DF looking for field $4 or "dk -k" looking for field $5 on lines with "total"

Also... you want to count NFS mounts?

Consider using bdf | awk '/^.dev/{ sum...
# The "^" anchors te search to the begin of line.
# The "." is a cheat place holder for /

fwiw,
Hein.

[Bill Hassell]

This script will probably give you everything you need. You can even select the mountpoints for a summary, like this: bdfmegs -s /dev/vg00/lvol* Here is the usage:

Usage: bdfmegs [ -glPpqstvu ] [ dir(s) or file(s) ]
where:
-g = gigabytes rather than megabytes
-l = local only (not NFS)
-p ## = highlight pct -ge ##
-P ## = same as -p but show only pct -ge ##
-q = suppress the header line and no char enhancements
-s = summary of total, used and available
-t xxxx = specifc filesystem (hfs vxfs nfs cdfs cifs autofs DevFS)
-u = usage details (return code = 0, usage text to stdout)
-v = verbose (shows FSversion, largefiles flag)
(requires read permission for mountpoint)

File(s) or dirpath(s) may be specified to limit
the output of bdfmegs as in:

bdfmegs -vlg /usr/contrib/bin /var/tmp

If bdfmegs is run as bdfgigs (ie, a link), then -g is default.
(bdfmegs ver 4.7)