ulimit - set or report file size limit
The ulimit utility sets or reports the file-size writing limit imposed on
files written by the shell and its child processes (files of any size may
be read). Only a process with appropriate privileges can increase the
The ulimit utility supports the XBD specification, Utility Syntax
The following option is supported:
-f Set (or report, if no blocks operand is present), the file size limit
in blocks. The -f option is also the default case.
The following operand is supported:
blocks The number of 512-byte blocks to use as the new file size limit.
The standard output is used when no blocks operand is present. If the
current number of blocks is limited, the number of blocks in the current
limit is written in the following format:
"%d\n", <number of 512-byte blocks>
If there is no current limit on the number of blocks, in the POSIX locale
the following format is used:
The following exit values are returned:
0 Successful completion.
>0 A request for a higher limit was rejected or an error occurred.
Since ulimit affects the current shell execution environment, it is
always provided as a shell regular built-in. If it is called in separate
utility execution environment, such as one of the following:
nohup ulimit -f 10000
env ulimit 10000
it will not affect the file size limit of the caller's environment.
Once a limit has been decreased by a process, it cannot be increased
(unless appropriate privileges are involved), even back to the original
Set the file size limit to 51,200 bytes:
ulimit -f 100
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