07-31-2008
Files bigger than the number of bytes that a 32 bit integer can reference are usually called largefiles. Most modern UNIX-es have support for it with either oddly-named non-standard calls like fopen64() or some kind of more modern filesystem.
If you have LARGEFILE support and no disk quota enabled, you can essentially create a file that has size equal to the free space available on the disk. This is a BAD idea in general. sysadmins love to hate giant files, especially small files with giant holes in them....
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All
I am trying to do
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Hi,
system aix 4.3
when I execute umilit i get result "unlimited".
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LEARN ABOUT OPENDARWIN
quotaoff
QUOTAON(8) BSD System Manager's Manual QUOTAON(8)
NAME
quotaon, quotaoff -- turn filesystem quotas on and off
SYNOPSIS
quotaon [-g] [-u] [-v] filesystem ...
quotaon [-g] [-u] [-v] -a
quotaoff [-g] [-u] [-v] filesystem ...
quotaoff [-g] [-u] [-v] -a
DESCRIPTION
Quotaon announces to the system that disk quotas should be enabled on one or more filesystems. Quotaoff announces to the system that the
specified filesystems should have disk quotas turned off. The filesystem must be mounted and it must have the appropriate mount option file
located at its root, the .quota.ops.user file for user quota configuration, and the .quota.ops.group file for group quota configuration.
Quotaon also expects each filesystem to have the appropriate quota data files located at its root, the .quota.user file for user data, and
the .quota.group file for group data. These filenames and their root location cannot be overridden. By default, quotaon will attempt to
enable both user and group quotas. By default, quotaoff will disable both user and group quotas.
Available options:
-a If the -a flag is supplied in place of any filesystem names, quotaon/quotaoff will enable/disable any filesystems with an existing
mount option file at its root. The mount option file specifies the types of quotas that are to be configured.
-g Only group quotas will be enabled/disabled. The mount option file, .quota.ops.group, must exist at the root of the filesystem.
-u Only user quotas will be enabled/disabled. The mount option file, .quota.ops.user, must exist at the root of the filesystem.
-v Causes quotaon and quotaoff to print a message for each filesystem where quotas are turned on or off.
Specifying both -g and -u is equivalent to the default.
Quotas for both users and groups will automatically be turned on at filesystem mount if the appropriate mount option file and binary data
file is in place at its root.
FILES
Each of the following quota files is located at the root of the mounted filesystem. The mount option files are empty files whose existence
indicates that quotas are to be enabled for that filesystem.
.quota.user data file containing user quotas
.quota.group data file containing group quotas
.quota.ops.user mount option file used to enable user quotas
.quota.ops.group mount option file used to enable group quotas
SEE ALSO
quota(1), quotactl(2), edquota(8), quotacheck(8), repquota(8)
HISTORY
The quotaon command appeared in 4.2BSD.
4.2 Berkeley Distribution October 17, 2002 4.2 Berkeley Distribution