Cant write to /tmp

czezz · 06-02-2009, 10:22 AM

My problem is that regular user (other than root) cant write to /tmp
Just in case I put chmod 777 /tmp but it did not change anything.

I discovered that problem during I was trying install Oracle 10.

Does anyone know where should I look for problem ?

druuna · 06-02-2009, 10:27 AM

Hi,

777 is not correct that should be 1777. I.e: chmod 1777 /tmp, as root user.

czezz · 06-02-2009, 12:33 PM

I dont have access to that system right now - will check it tomorrow but...
I tryed on other system to chmod 777 /tmp and regular users still have access to it.

druuna · 06-02-2009, 12:46 PM

Hi,

True, when changing permissions to 777 everybody will be able to write and remove everybody's(!!) files..... Not what is wanted.

The 1777 mode change makes sure that any user can write to the /tmp directory, but cannot remove other user's files from them. The latter is prohibited by the so-called sticky bit, the highest bit (1) in the 1777 bit mask.

This also applies for /var/tmp.

jlliagre · 06-02-2009, 06:33 PM

Quote:

Originally Posted by czezz

My problem is that regular user (other than root) cant write to /tmp

That isn't a problem but the purpose of /tmp. Everyone has to be able to create files on /tmp (and /var/tmp) otherwise many applications will break.

The specific 1777 permission is there to prevent non-root users to remove or change permissions of other user's files.

czezz · 06-03-2009, 01:45 AM

Hi guys,
I just checked and you are right. Now regular users has write permission.

What Im trying to do now is to install oracle. Never had a problem with that before but not this time

.

When I start runInstaller, it shows me this error:

Code:

$ ./runInstaller
Starting Oracle Universal Installer...

Checking installer requirements...

Checking operating system version: must be 5.8, 5.9 or 5.10.    Actual 5.10
                                      Passed

Checking Temp space: must be greater than 250 MB.   Actual 1836 MB    Passed
Checking swap space: must be greater than 500 MB.   Actual 1919 MB    Passed
Checking monitor: must be configured to display at least 256 colors.    Actual 16777216    Passed

All installer requirements met.

Preparing to launch Oracle Universal Installer from /tmp/OraInstall2009-06-03_08-27-07AM. Please wait ...
Error in writing to directory /tmp/OraInstall2009-06-03_08-27-07AM. Please ensure that this directory is writable and h
as atleast 69 MB of disk space. Installation cannot continue.
: Error 0

Well... Im sure now that /tmp is writeable. Also space is almopst 2G. Any ideas ?

druuna · 06-03-2009, 01:59 AM

Hi,

Only thing I can come up with: Are you running the oracle installer as root or as oracle user? If I remember correctly the oracle user should run it and _not_ root.

Hope this helps.

czezz · 06-03-2009, 02:19 AM

oracle user ofcurse:

Code:

$ id
uid=300(oracle) gid=300(dba)

druuna · 06-03-2009, 02:28 AM

Hi again,

If I understand correctly you already tried this procedure (installing oracle) before. Did you remove anything that oracle left behind?

To clear that up a bit: Did oracle create the /tmp/OraInstall2009-06-03_08-27-07AM dir already in a previous session?

There is enough space on /tmp (oracle checked that: Checking Temp space: must be greater than 250 MB. Actual 1836 MB Passed), /tmp has the correct permissions. That leaves the OraInstall2009-06-03_08-27-07AM directory.

Try cleaning up as much as possible and try again.

I have to admit that I'm grasping at straws atm, but maybe, just maybe this will help

czezz · 06-03-2009, 03:22 AM

Exectelly, I cleaned up system after each try - didnt help.
I just took another server and installed it without any problems.