# Ulimit on AIX

**URL:** <https://community.unix.com/t/ulimit-on-aix/392476>\
**Category:** AIX\
**Created:** [November 9, 2023, 2:51pm UTC](https://community.unix.com/t/ulimit-on-aix/392476 "2023-11-09T14:51:06Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![big123456](https://community.unix.com/letter_avatar/big123456/32/6_22734026db12803ebb3e059622ac3534.png) [@big123456](https://community.unix.com/u/big123456)\
**Post date:** [November 9, 2023, 2:51pm UTC](https://community.unix.com/t/ulimit-on-aix/392476/1 "2023-11-09T14:51:06Z")

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Hi,  
On AIX 7, we want to Increase the ulimit(COREDUMP) to unlimited.  
Should we restart server for that?

Thanks and regards.

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**Author:** ![munkeHoller](https://community.unix.com/user_avatar/community.unix.com/munkeholler/32/7431_2.png) [@munkeHoller](https://community.unix.com/u/munkeHoller)\
**Post date:** [November 9, 2023, 3:18pm UTC](https://community.unix.com/t/ulimit-on-aix/392476/2 "2023-11-09T15:18:39Z")

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Best to read the documentation - [ulimits](https://www.ibm.com/docs/en/aix/7.3?topic=u-ulimit-command)

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**Author:** ![MadeInGermany](https://community.unix.com/letter_avatar/madeingermany/32/6_22734026db12803ebb3e059622ac3534.png) [@MadeInGermany](https://community.unix.com/u/MadeInGermany)\
**Post date:** [November 9, 2023, 4:00pm UTC](https://community.unix.com/t/ulimit-on-aix/392476/3 "2023-11-09T16:00:02Z")

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This man page confuses me.  
It mentions mkuser/chuser but not PAM.

A normal Unix and Linux would apply the system-wide limits (in /etc/security/...) via PAM when the user accesses the system.

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**Author:** ![munkeHoller](https://community.unix.com/user_avatar/community.unix.com/munkeholler/32/7431_2.png) [@munkeHoller](https://community.unix.com/u/munkeHoller)\
**Post date:** [November 9, 2023, 4:17pm UTC](https://community.unix.com/t/ulimit-on-aix/392476/4 "2023-11-09T16:17:18Z")

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not a fan of the ibm documentation - from the few pieces encountered.

I think PAM is alive and kicking, just not obvious

> **[PAM configuration file](https://www.ibm.com/docs/en/aix/7.3?topic=modules-pam-configuration-file)**
>
> The /etc/pam.conf configuration file consists of service entries for each PAM module type and serves to route services through a defined module path.

> **[Pluggable Authentication Modules](https://www.ibm.com/docs/en/aix/7.3?topic=system-pluggable-authentication-modules)**
>
> The pluggable authentication module (PAM) framework provides system administrators with the ability to incorporate multiple authentication mechanisms into an existing system through the use of pluggable modules.

would need to inspect config to see what is actually being employed.

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**Author:** ![system](https://community.unix.com/uploads/default/original/2X/c/c7e9e16a595259edafe88615719d5c5dcda035c2.png) [@system](https://community.unix.com/u/system)\
**Post date:** [November 16, 2023, 4:18pm UTC](https://community.unix.com/t/ulimit-on-aix/392476/5 "2023-11-16T16:18:05Z")

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Closed on November 16, 2023, 4:18pm UTC

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