>Usage
The ulimit command in Unix is used to set user-level resource limits for the current shell and processes started by it. It controls the maximum resources available, such as memory usage, file size, and process counts.
>Synopsis
>Options
-a
Displays all current limits for the user’s shell and processes.
Example:
-zsh
> ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
max user processes (-u) 1024
open files (-n) 256
-c
Sets the maximum size of core dump files created.
Example:
-zsh
> ulimit -c 0
Limits core dump file size to 0 blocks, effectively disabling core dumps
-f
Sets the maximum size of files the shell can create.
Example:
-zsh
> ulimit -f 1000
Limits maximum file size to 1000 blocks
-u
Sets the maximum number of processes a user can create.
Example:
-zsh
> ulimit -u 200
Limits the number of processes to 200 for the current user
-v
Sets the maximum amount of virtual memory available.
Note: This option is not supported on macOS; it is only valid on Linux.
Example:
-zsh
> ulimit -v 500000
Limits the virtual memory usage to 500,000 KB