The check-sum command calculates a hexadecimal checksum for a specified attribute, or the entire item if no attribute is specified, and produces result as a list. The checksum statistics change whenever a file is updated, providing a means to determine if a file has been changed.
When an item list is specified, statistics are calculated only for the selected item-IDs. If not specified, the entire file is used. If an attribute name is specified, statistics are generated only for the attribute name or number specified. If the attribute name is not used, or if the specified attribute number is 9999, the entire item is used. The attribute mark trailing the specified attribute (or item) is included in the statistics.
To use checksum statistics, check-sum all files, or portions of files to be verified and record the output statistics. At a later time, repeat the check-sum process. To verify that the files have not changed, manually compare the two checksums.
Syntax
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check-sum file.reference {item.list} {selection.criteria} {modifiers} {(options)} |
on the first value in the attribute. Further, each item-ID only displays once, assuming that its display is not suppressed.
Example(s)
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check-sum bp |
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Byte statistics for : bp |
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|
|
Total |
Average |
Maximum |
Min |
|
Bytes |
= |
39546 |
919.67 |
8117 |
13 |
|
Values |
= |
1614 |
37.53 |
320 |
1 |
|
Attributes |
= |
1614 |
37.53 |
320 |
1 |
|
#Items |
= |
43 |
|
|
|
|
Chksum |
= |
EBF3CE55 |
|
|
|
|
Bits |
= |
121447 |
|
|
|
See Also