Calculating the size of /

Colin Law clanlaw at googlemail.com
Mon Sep 10 20:25:11 UTC 2012


On 10 September 2012 21:16, Jim Byrnes <jf_byrnes at comcast.net> wrote:
> On 09/10/2012 02:15 PM, Gilles Gravier wrote:
>>
>> Adding -x to du tells it so skip directories on different filesystems...
>> Should give you what you want.
>>
>>> sudo du -shcx /
>>
>>
>> Gilles.
>>
>>
>
> I don't have any other file systems that I know of except gvfs which to my
> knowledge have never used..
>
>  sudo du -shcx /
> du: cannot access `/home/xxx/.gvfs': Permission denied
> 105G    /
> 105G    total
> $ du -shcx /home
> 64G     /home
> 64G     total
>
> Unless I used it wrong -x doesn't show anything different.

What does df show?

Colin

>
> Regards,  Jim
>
>>
>> On 10/09/2012 21:03, Jim Byrnes wrote:
>>>
>>> In another thread I was trying to calculate how much disk space to
>>> allocate to / if I did a fresh install and this time setup  a separate
>>> /home partition.
>>>
>>> To get an idea of how much was outside of the home folder on my
>>> present install I did:
>>>
>>> sudo du -shc /  =>  105GB
>>> du -shc /home   =>  64GB
>>>
>>> This led me to believe I had 105GB - 64GB = 41GB that would be in /.
>>>
>>> Colin suggested I run Disk Usage Analyzer:
>>>
>>> Total filesystem capacity: 264.7GB(used: 104.5GB avail: 160.2GB
>>>
>>> /        100%        75.3GB
>>> home        84.1%        63.3GB
>>> usr        6.7%        5.0GB
>>> var        5.8%        4.4GB
>>> lib        2.1%        1.6GB
>>> opt        1.0%        762.2MB
>>> boot        0.3%        194.6MB
>>>
>>> Everything else was 0.0%
>>>
>>> So this seems to say that if I had a separate /home on this machine
>>> that / would be 12GB not the 41GB calculated above.
>>>
>>> So what accounts for the difference of 29.2GB between the used of
>>> 104.5GB and / of 75.3GB?
>>>
>>> The 12GB and 29.2GB = the 41GB I originally calculated would be needed
>>> for /.  12GB seems to be more in line with what others reported as the
>>> size needed for /.
>>>
>>> Regards,  Jim
>>>
>>>
>>
>
>
>
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