06-20-2007
max file size in unix
The max file size in unix is determined by the ulimit option. The ulimit stands for user limit which specifies the largest file that can be created by the user.
$ulimit
2097152
means that the max size of a file that can be created is 2097152 bytes or 2048 KB.
We can also reset the ulimit value
$ulimit=1 specifies that the user limit is now 512 bytes(1 refers to 512 block) and is only active for this session.
A normal user can decrease the ulimit value but only the superuser(root) has the permissions to increase this value.
Hope this clears your doubt. Thank you.
Suresh.
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LEARN ABOUT REDHAT
ulimit
ULIMIT(3) Linux Programmer's Manual ULIMIT(3)
NAME
ulimit - get and set user limits
SYNOPSIS
#include <ulimit.h>
long ulimit(int cmd, long newlimit);
DESCRIPTION
Warning: This routine is obsolete. The include file is no longer provided by glibc. Use getrlimit(2), setrlimit(2) and sysconf(3) instead.
For the shell command ulimit, see bash(1).
The ulimit call will get or set some limit for the current process. The cmd argument can have one of the following values.
UL_GETFSIZE
Return the limit on the size of a file, in units of 512 bytes.
UL_SETFSIZE
Set the limit on the size of a file.
3 (Not implemented for Linux.) Return the maximum possible address of the data segment.
4 (Implemented but no symbolic constant provided.) Return the maximum number of files that the calling process can open.
RETURN VALUE
On success, ulimit returns a nonnegative value. On error, -1 is returned, and errno is set appropriately.
ERRORS
EPERM A non-root process tried to increase a limit.
CONFORMING TO
SVID.
SEE ALSO
bash(1), getrlimit(2), setrlimit(2), sysconf(3)
Linux 2.0 1998-06-12 ULIMIT(3)