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UNIX in a Nutshell: System V Edition

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ulimit

ulimit [options] [n]

Print the value of one or more resource limits, or, if n is specified, set a resource limit to n. Resource limits can be either hard (-H) or soft (-S). By default, ulimit sets both limits or prints the soft limit. The options determine which resource is acted on.

Options

-H

Hard limit. Anyone can lower a hard limit; only privileged users can raise it.

-S

Soft limit. Must be lower than the hard limit.

-a

Print all limits.

-c

Maximum block size of core files.

-d

Maximum kbytes of data segment or heap.

-f

Maximum block size of files (the default option).

-n

Maximum file descriptor plus 1.

-s

Maximum kbytes of stack segment

-t

Maximum CPU seconds.

-v

Maximum kbytes of virtual memory.


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