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Full Discussion: Randomly appearing control characters in text files
Operating Systems AIX Randomly appearing control characters in text files Post 302080377 by aakashahuja on Tuesday 18th of July 2006 05:26:02 AM
Old 07-18-2006
Randomly appearing control characters in text files
Hi,

From some time, we have noticed that our ascii files have started corrupting due to the presence of some random control characters (^@, ^M, ^H, ^D). The characters appear randomly on any file after the process that creates the file finishes. If we rerun the process, the files re creates perfectly without problems.

The appear on any file randomly. Their location in the file is also random. We tried a reboot of the server (AIX 5. something), but the problem still persists. We found some bad blocks on disk during reboot and then we did a restore from backup.

The problem still persists.

Thanks
Aakash
 

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LEARN ABOUT SUNOS

aset.restore

aset.restore(1M)					  System Administration Commands					  aset.restore(1M)

NAME

       aset.restore - restores system files to their content before ASET is installed

SYNOPSIS

       aset.restore [-d aset_dir]

DESCRIPTION

       aset.restore restores system files that are affected by the Automated Security Enhancement Tool (ASET) to their pre-ASET content. When ASET
       is executed for the first time,	it saves and archives the original system files in the	/usr/aset/archives  directory.	 The  aset.restore
       utility reinstates these files.	It also deschedules ASET, if it is currently scheduled for periodic execution. See  asetenv(4).

       If  you	have  made changes to system files after  running ASET, these changes are lost when you run  aset.restore. If you want to be abso-
       lutely sure that you keep the existing  system state, it is recommended that you back-up your  system before using  aset.restore.

       You should use  aset.restore, under the following circumstances:

	      You want to remove ASET permanently and restore the original system (if you want to deactivate ASET, you can remove it from schedul-
	      ing).
	      You are unfamiliar with ASET and want to experiment with it.  You can use aset.restore to restore the original system state.
	      When  some  major  system  functionality	is  not working properly and you suspect that ASET is causing the problem; you may want to
	      restore the  system to see if the problem persists without ASET.

       aset.restore requires root privileges to execute.

OPTIONS

       The following options are supported:

       -d aset_dir     Specify the working directory for ASET. By default, this directory is /usr/aset. With this option  the  archives  directory
		       will be located under aset_dir.

FILES

       /usr/aset/archives      archive of system files prior to executing aset

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWast			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       aset(1M), asetenv(4), attributes(5)

       System Administration Guide: Basic Administration

SunOS 5.10							    11 Oct 1991 						  aset.restore(1M)
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