ulimit
TLDR
Show all limits
$ ulimit -a
Show file size limit$ ulimit -f
Set open files limit$ ulimit -n [4096]
Show stack size$ ulimit -s
Set unlimited stack$ ulimit -s unlimited
Show hard limits$ ulimit -Ha
SYNOPSIS
ulimit [-a] [-f] [-n] [-s] [-H] [-S] [value]
DESCRIPTION
ulimit controls resource limits. It's a shell builtin.
Process limits. CPU, memory, files.
Soft and hard limits. User vs system.
Per-session settings. Shell scope.
Security control. Resource management.
PARAMETERS
-a
All limits.-f
File size.-n
Open files.-s
Stack size.-H
Hard limit.-S
Soft limit.
CAVEATS
Shell builtin. Settings not persistent. Root for hard limits.
HISTORY
ulimit is a standard Unix shell builtin for controlling resource limits, available in bash, zsh, and other shells.
SEE ALSO
limits.conf(5), sysctl(8), getrlimit(2)
