Limiting users logged in

[TriggerOfSunderland]

How do i go about limiting the number of users logged into my unix server to 99?

Regards

[Adam W.]

You can use

kmtune |grep pty
npty 200 - 200


or use

# sysdef |grep pty
npty 200


These are the default settings but if you alter the # from 200 to... whatever that will set the limit. Man kmtune or sysdef for more options.

[sreekanthtm]

To check the current value of maxusers

# kmtune -q maxusers

To change the value of maxusers

# kmtune -s maxusers=99

If kmtune is not working please provide the HPUX version running in ur server.

# uname -a


Rgds
Sreekanth

[Adam W.]

I forgot to add that the -s option is what would be used with kmtune to set max users. Again Man page for the command tells everything.

[Venkatesh BL]

Yes, tune 'maxusers'.

'npty' is for pseudo-terminals. Note that one user can invoke many pseudo-terminal connections.

[TriggerOfSunderland]

maxusers doesn't seem to work, and it doesn't appear in SAM under the Kernel tunables.
The version i am running is: HP-UX flgu02 B.11.23 U 9000/800 3237201803 unlimited-user license

Regards

[sreekanthtm]

you may need to use the full path.

# /usr/sbin/kmtune.

You can use # whereis to get the absolute path of an executable in HPUX

Need not use SAM.

Rgds
Sreekanth

[Adam W.]

sreekanthtm, excellent reference I LOVE the whereis command.

[Adam W.]

and trigger a big word of advice, even though SAM does have its uses (although not very often) SAM is very limited and not a very good reference to use unless you have no choise. Stick with the command line unless you ABSOLUTELY HAVE to use SAm. (Just some advice, take it as you will.)

[Duncan Edmonstone]

You won't find kmtune anywhere on a 11.23 box. Try kctune instead.

I'm not sure the maxusers parameter even exists in 11.23... and I don't think setting it would prevent more than 100 people from logging in anyway

How do your users login to the system? At a shell prompt?

Why do you need to stop the 100th person from logging in?

HTH

Duncan

[TriggerOfSunderland]

Duncan,

You're right maxusers isn't an option.

I need to limit the number of users because rather than put a user limit on the 10 or so progress databases we use for licencing, we want to put a limit on the server itself and have unlimited user limits on each of the databases creating a 'pool' of licences, if you know what i mean.

Regards

[Duncan Edmonstone]

and do all your progess database users connect through a UNIX shell prompt? This seems unlikely to me...

HTH

Duncan

[TriggerOfSunderland]

Yeah, all users connect via telnet and open a shell prompt.

[Victor Fridyev]

Hi,

You can add some test into /etc/profile.

Something like that:
if [ $(who | grep -v root| sort -u |wc -l) -gt 99 ]; then
exit
#You can add here a mail to the user
fi
I don't know which type of license you have, so you can remove sort -u
HTH