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Full Discussion: Change file permission of mounted drive Linux
Top Forums Shell Programming and Scripting Change file permission of mounted drive Linux Post 302958595 by Corona688 on Friday 23rd of October 2015 02:49:33 PM
Old 10-23-2015
NTFS is the filesystem Microsoft Windows uses, and increasingly these days, now that drives have finally gotten too large for even FAT32 to handle, disks are coming preformatted with it.

In short, an NTFS volume does not have UNIX file permissions, it has something completely different which doesn't translate into UNIX terms. Particularly it does not have a number for owner, a number for group, or 3 groups of rwx file permission bits. You must tell the driver what user, group, and permissions to assume by default with umask=022,uid=number,gid=number in the options group

That doesn't leave a lot for chmod or chown to work with. I think it's possible to set the NTFS "read only" bit by removing r from user, group and world, maybe.
 

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LEARN ABOUT FREEBSD

quotaoff

QUOTAON(8)						    BSD System Manager's Manual 						QUOTAON(8)

NAME

     quotaon, quotaoff -- turn file system 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

     The quotaon utility announces to the system that disk quotas should be enabled on one or more file systems.  The quotaoff utility announces
     to the system that the specified file systems should have any disk quotas turned off.  The file systems specified must have entries in
     /etc/fstab and be mounted.  The quotaon utility expects each file system to have quota files named quota.user and quota.group which are
     located at the root of the associated file system.  These defaults may be overridden in /etc/fstab.  By default both user and group quotas
     are enabled.

     Available options:

     -a      If supplied in place of any file system names, quotaon/quotaoff will enable/disable all the file systems indicated in /etc/fstab to
	     be read-write with disk quotas.  By default only the types of quotas listed in /etc/fstab are enabled.

     -g      Only group quotas listed in /etc/fstab should be enabled/disabled.

     -u      Only user quotas listed in /etc/fstab should be enabled/disabled.

     -v      Cause quotaon and quotaoff to print a message for each file system where quotas are turned on or off.

     Specifying both -g and -u is equivalent to the default.

FILES

     quota.user   at the file system root with user quotas
     quota.group  at the file system root with group quotas
     /etc/fstab   file system table

SEE ALSO

     quota(1), quotactl(2), fstab(5), edquota(8), quotacheck(8), repquota(8)

HISTORY

     The quotaon utility appeared in 4.2BSD.

BSD
								 December 11, 1993							       BSD
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