Shulou(Shulou.com)06/02 Report--

This article will explain in detail the resources of using ulimit commands in linux to control shell programs. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Linux for each user, the system limits the maximum number of processes. In order to improve performance, we can set the maximum number of processes for each linux user according to the device resources, and we can use ulimit to display the current user process limits.

Ulimit is a built-in command for shell and can be used to control the resources that shell executes the program.

Syntax format: ulimit [parameters]

Common parameters:

-a displays the current resource limit setting-the maximum value of the data section area of the d program, specified in KB-t the upper limit of CPU usage time, in seconds-u the maximum number of programs that users can open-v specifies the upper limit of virtual memory available in KB

Reference example

Displays the settings for system resources:

[root@linuxcool] # ulimit-a

Set the limit on the number of programs per user:

[root@linuxcool] # ulimit-u 500

Increase the number of files that each process can open to 4096:

[root@linuxcool] # ulimit-n 4096

Specify that the upper limit of available virtual memory is 12800KB:

[root@linuxcool] # ulimit-v 12800

Specify that the upper limit of CPU usage time is 2s:

[root@linuxcool ~] # ulimit-t 2 so much for using ulimit commands in linux to control shell programs. I hope the above can be helpful to you and learn more. If you think the article is good, you can share it for more people to see.

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