[CentOS] Deleting contents of /tmp on shutdown

Ross Walker rswwalker at gmail.com
Mon Dec 14 20:10:47 UTC 2009


On Dec 14, 2009, at 9:55 AM, <tdukes at sc.rr.com> wrote:

>
> ---- Ross Walker <rswwalker at gmail.com> wrote:
>> On Dec 14, 2009, at 7:14 AM, "Thomas Dukes" <tdukes at sc.rr.com> wrote:
>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: centos-bounces at centos.org
>>>> [mailto:centos-bounces at centos.org] On Behalf Of Eero Volotinen
>>>> Sent: Monday, December 14, 2009 3:27 AM
>>>> To: CentOS mailing list; Sorin Srbu
>>>> Cc: 'CentOS mailing list'
>>>> Subject: Re: [CentOS] Deleting contents of /tmp on shutdown
>>>>
>>>> Quoting Sorin Srbu <sorin.srbu at orgfarm.uu.se>:
>>>>
>>>>>> -----Original Message-----
>>>>>> From: centos-bounces at centos.org
>>>> [mailto:centos-bounces at centos.org] On
>>>>> Behalf
>>>>>> Of Geerd-Dietger Hoffmann
>>>>>> Sent: Saturday, December 12, 2009 11:22 PM
>>>>>> To: CentOS mailing list
>>>>>> Subject: Re: [CentOS] Deleting contents of /tmp on shutdown
>>>>>>
>>>>>> On Sat, Dec 12, 2009 at 10:05 PM, Thomas Dukes
>>>> <tdukes at sc.rr.com> wrote:
>>>>>>
>>>>>> I have the /tmp in memory, which effectively deletes everything  
>>>>>> on
>>>>>> reboot. Maybe another solution?
>>>>>
>>>>> How do you achieve that?
>>>>> --
>>>>> /Sorin
>>>>>
>>>>
>>>> using tmpfs?
>>>>
>>>> http://kevin.vanzonneveld.net/techblog/article/create_turbocha
>>>> rged_storage_using_tmpfs/
>>>>
>>>
>>> One thing that's not clear in the two links that have been posted
>>> about
>>> doing this is, do you add the line or replace the the line already
>>> present
>>> in /etc/fstab?
>>>
>>> /dev/VolGroup00/LogVol00 /                       ext3
>>> defaults        1 1
>>> LABEL=/boot             /boot                   ext3
>>> defaults        1 2
>>> none                    /dev/pts                devpts
>>> gid=5,mode=620  0 0
>>> none                    /dev/shm                tmpfs
>>> defaults        0 0
>>> <----------
>>> none                    /proc                   proc
>>> defaults        0 0
>>> none                    /sys                    sysfs
>>> defaults        0 0
>>> /dev/VolGroup00/LogVol01 swap                    swap
>>> defaults        0 0
>>
>> Here is what I put in my fstab:
>>
>> tmpfs /tmp tmpfs defaults 0 0
>>
>> And your done. By default it will use 1/2 of your memory and under
>> pressure it's first to swap and even if you run off swap it gives
>> comparable performance to the way it is now.
>>
>> -Ross
>
> Thanks, Ross
>
> Do I leave this line in tact or remove/replace it:
>
> none    /dev/shm    tmpfs

No, leave the existing /dev/shm, some apps depend on it.

You can use the 'none' keyword too for /tmp as in:

none /tmp tmpfs defaults 0 0

Either 'tmpfs' or 'none' should work.

-Ross



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