08-04-2013
Quote:
Originally Posted by
nimafire
is there any freeze software for Linux-redhat system to prevent any changes on /root
On systems that support MAC you may be able to modify a policy to deny writes to files, denying policy alteration and denying reboot (convoluted). On file systems that support it you can set the immutable bit (weak). On file systems that do not support extended attributes you could mount another /root directory over it with the ro flag set (even weaker option).
*Do note anyone with root privileges can undo things. Also note immutable files are of no use if the real cause of the problem should not be addressed through the use of technology (as in PEBCAK).
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quotaon(1M) System Administration Commands quotaon(1M)
NAME
quotaon, quotaoff - turn ufs file system quotas on and off
SYNOPSIS
quotaon [-v] filesystem...
quotaon -a [-v]
quotaoff [-v] filesystem...
quotaoff -a [-v]
DESCRIPTION
quotaon turns on disk quotas for one or more ufs file systems.
Before a file system may have quotas enabled, a file named quotas, owned by root, must exist in the root directory of the file system. See
edquota(1M) for details on how to modify the contents of this file.
quotaoff turns off disk quotas for one or more ufs file systems.
The file systems specified must already be mounted.
These commands update the mntopts field of the appropriate entries in /etc/mnttab to indicate when quotas are on or off for each file sys-
tem. If quotas are on, the string quota will be added to mntopts; if quotas are off, the quota string is not present.
filesystem must be either the mount point of a file system, or the block device on which the file system resides.
OPTIONS
quotaon
-a This option is normally used at boot time to enable quotas. It applies only to those file systems in /etc/vfstab which have ``rq''
in the mntopts field, are currently mounted ``rw'', and have a quotas file in the root directory.
-v Display a message for each file system after quotas are turned on.
quotaoff
-a Force all file systems in /etc/mnttab to have their quotas disabled.
-v Display a message for each file system affected.
USAGE
See largefile(5) for the description of the behavior of quotaon and quotaoff when encountering files greater than or equal to 2 Gbyte ( 2
**31 bytes).
FILES
/etc/mnttab mounted file systems
/etc/vfstab list of default parameters for each file system
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
edquota(1M), quota(1M), quotacheck(1M), repquota(1M), mnttab(4), vfstab(4), attributes(5), largefile(5), quotactl(7I)
SunOS 5.10 16 Sep 1996 quotaon(1M)