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The Daily Insight

What is Ulimit command?

Author

James Stevens

Updated on March 03, 2026

The ulimit command sets or reports user process resource limits. The default limits are defined and applied when a new user is added to the system. With the ulimit command, you can change your soft limits for the current shell environment, up to the maximum set by the hard limits.

How do I find command history in HP-UX?

Re: HP-UX enable history command navigation Type a command like pwd and then type the command: history. The history command shows your current history file. You recall the last command by type ESC then k. You can search for the most recent command containing a string using ESC /.

How do I permanently set Ulimit in AIX?

To set ulimit values:

  1. To set or verify the ulimit values on AIX: Log in as the root user. Run the following commands: chuser nofiles=32768 nofiles_hard=65536 admin_user_ID.
  2. To set or verify the ulimit values on Linux: Log in as the root user. Edit the /etc/security/limits.conf file and specify the following values:

How do you modify Ulimit?

How to increase the ulimit and file descriptors limit in linux.

  1. To change the ulimit setting, edit the file /etc/security/limits.conf and set the hard and soft limits in it :
  2. Now,test system settings using the below commands:
  3. To check the current open file descriptor limit:

What is Ulimit used for?

ulimit is admin access required Linux shell command which is used to see, set, or limit the resource usage of the current user. It is used to return the number of open file descriptors for each process. It is also used to set restrictions on the resources used by a process.

What is HP-UX 11i v3?

The HP-UX 11i v3 2020 Operating Environment Update Release (“2020 HP-UX OEUR” or “HP-UX 11i v3”) is now available for HPE Integrity (Intel ® Itanium® based) systems. New enhancements are provided to increase availability and efficiency, while continuing to provide proven stability.