topic Re: Lock file in Operating System - HP-UX

Lock file

juno2 — Sat, 11 Oct 2003 02:19:04 GMT

I am not understand the below difference of UX and linux system,

I tried the UX allow two users change the password at the same time by the command â passwdâ , but the linux canâ t , because linux donâ t allow two users concurrent update the file /etc/passwd , it will lock the passwd file ( check the file /etc/.pwd.lock ) when one user is updating the password . However , I do think two users change password at the same time is very common situtation , can suggest is it possible to disable the lock file function ? so that the users can change the password at the same time ? I know this is linux side problem , but UX concept whether can apply to the linux block ?

Re: Lock file

Rajeev Shukla — Sat, 11 Oct 2003 02:31:11 GMT

Hi Juno2,

I am sorry but you post a lot of questions but dont bother to look back at people who take time to give solutions.
You'r last 2 posts are still unasigned with points.
I hope you understand...

Cheers
Rajeev

Re: Lock file

juno2 — Sat, 11 Oct 2003 02:36:56 GMT

Yes , thx for reminding me , I will assign the pt ASAP.

Re: Lock file

T G Manikandan — Sat, 11 Oct 2003 03:32:44 GMT

you are right! When a processes accesses the password file /etc/.pwd.lock file is created, so that other processes do not acccess the file.

you can do a

#fuser /etc/.pwd.lock
identify the process and then terminate them.

I don't think you can disable this!

Re: Lock file

juno2 — Sat, 11 Oct 2003 04:50:19 GMT

HI TG,

I am strange why UX block can do that ,
I tried your method
# fuser /etc/.pwd.lock , but no output , can suggust what can i do ? thx.

Re: Lock file

juno2 — Sat, 11 Oct 2003 05:04:19 GMT

Thx reply, can suggest how can I allow all users to change password at the same time ? thx.

Re: Lock file

Thierry Poels_1 — Sat, 11 Oct 2003 05:21:55 GMT

Hi,

the password file is locked during update for consistency reasons. If two users would simultaneously update the password file, the first update might be overwritten by the second user.

On the other hand: what is the chance that two or more users change their passwords at the same moment?

regards,
Thierry Poels.

Re: Lock file

T G Manikandan — Sat, 11 Oct 2003 05:24:40 GMT

Is there any file like /etc/ptmp

if present,rename the file and try again