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Full Discussion: Is there any option to verify size at destination end after NDM?
Top Forums Shell Programming and Scripting Is there any option to verify size at destination end after NDM? Post 302787213 by hanson44 on Friday 29th of March 2013 01:48:09 AM
Old 03-29-2013
md5sum is incredibly useful. This is one of my favorite utilities. I rely on it to verify that giant data files do not change or get corrupted when transferred, or after sitting around a long time on disk.

md5sum calculates and verifies checksums (incredibly big numbers like file fingerprints), for example like this:
Code:
$ md5sum file1
27a3024f4381f60aa6a232c2de903645  file1

Code:
$ md5sum file1 > log
$ md5sum -c log
file1: OK
$ echo $?
0

Code:
$ date >> file1
$ md5sum -c log
file1: FAILED
md5sum: WARNING: 1 computed checksum did NOT match
$ echo $?
1

It is guaranteed that if your file is changed during transfer, even the slightest bit, the checksum will be different. You can check the exit value of "md5sum -c" to determine if the file has been changed.
 

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LEARN ABOUT CENTOS

dbverify

DBVERIFY(8)						      System Manager's Manual						       DBVERIFY(8)

NAME

       dbverify - Directory Server script for indexing attributes

SYNOPSIS

       dbverify [-Z serverID] [-n backend] [-V] [-v] [-d debuglevel] [-h]

DESCRIPTION

       Verifies  the  backend  database  files.  If  the  server  crashes  because of a corrupted database, this command can be used to verify the
       integrity of the different database files to help isolate any problems.	This script should be run while the server instacne is stopped.

OPTIONS

       A summary of options is included below:

       -Z Server Identifier
	      The server ID of the Directory Server instance.  If there is only one instance on the system, this option can be skipped.

       -n Backend Name
	      The name of the LDBM database to reindex.  Example: userRoot

       -d Debug Level
	      Sets the debugging level.

       -V
	      Verbose output.

       -v
	      Display the version of the Directory Server.

       -h
	      Display the usage.

EXAMPLE

       dbverify -Z instance3 -n userRoot -V

DIAGNOSTICS

       Exit status is zero if no errors occur.	Errors result in a non-zero exit status and a diagnostic message being written to standard error.

AUTHOR

       dbverify was written by the 389 Project.

REPORTING BUGS

       Report bugs to http://bugzilla.redhat.com.

COPYRIGHT

       Copyright (C) 2013 Red Hat, Inc.

								    Mar 5, 2013 						       DBVERIFY(8)
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