Ubuntu not using the swap partition

Derek Broughton news at pointerstop.ca
Wed Mar 26 12:47:22 UTC 2008


Ioannis Vranos wrote:

> Bob McConnell wrote:
>> 
>> What does free tell you? The swap partition shows up under memory usage
>> not disk usage.
> 
> 
> john at john-desktop:~$ free
>              total       used       free     shared    buffers     cached
> Mem:       1035616     487784     547832          0       9812     269948
> -/+ buffers/cache:     208024     827592
> Swap:       971924      77968     893956
> john at john-desktop:~$
> 
> 
> Well, previously I used CentOS & Scientific Linux, and "df" showed the
> swap partition there. It looks like this isn't the case with Ubuntu Linux.

I don't think so:

[derek at nautilus ~]$ cat /etc/issue
CentOS release 4.6 (Final)
Kernel \r on an \m

[derek at nautilus ~]$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/md0              20161084  13561020   5575928  71% /
none                   2537828         0   2537828   0% /dev/shm
/dev/md2             218130980  27003928 180046624  14% /home

As somebody else pointed out, since swap isn't a filesystem, it shouldn't
appear in df - even in CentOS.

As long as you have an entry in /etc/fstab like:
  <SOMETHING> none swap sw 0 0
you're fine.  <SOMETHING> will probably be a UUID= string, as it was created
by the installer, but could just as easily be /dev/hdc1 
-- 
derek





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