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Top Forums Shell Programming and Scripting Script to copy creation date over top of modified date? Post 302970969 by bakunin on Thursday 14th of April 2016 07:52:23 AM
Old 04-14-2016
Quote:
Originally Posted by toysareforboys
I know how to touch every file recursively, but no idea how to read a files creation date then use that to touch the modification date of that file
OK, one problem after the other:

1) How to get the creation date
Use the command istat. For details see man istat.

2) How to set the date of a file
Use touch -t <time>. See the man page of touch for details.

3) How to circle through a set of files
Use the find-command. Basically, find starts at some "starting point" directory and works its way recursively from there, finding every filesystem entry there is. You can exclude (or include) certain files and/or directories, so that only a part of the whole set is produced. Once the set is what you want you can add a certain action to each item found that way by adding the "-exec"-clause. Here is an example:
Code:
find /some/dir -type f -name "AB*" -exec cp {} /other/place \;

This will start in "/some/dir", only include files ("-type f") in the result set, further restrict the result set only to names beginning with "AB" ("-name "AB*") and finally execute the command cp {} /other/place for each file found that way. The "{}" is a placeholder for the respective filename found that way which will be filled in by the find-command.

For details: again, see the man-page.

4) How to change the date from one format to another
You haven't told us which system you are on. If you have the date-utility from GNU: it can do that. If not: you will need to get one of the many solutions already published. Search the forum (or even the internet) for "date calculation" or something such and you will find a myriad of hits.

I hope this helps.

bakunin
 

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DNSSEC-SETTIME(8)						       BIND9							 DNSSEC-SETTIME(8)

NAME
dnssec-settime - Set the key timing metadata for a DNSSEC key SYNOPSIS
dnssec-settime [-f] [-K directory] [-P date/offset] [-A date/offset] [-R date/offset] [-I date/offset] [-D date/offset] [-h] [-v level] [-E engine] {keyfile} DESCRIPTION
dnssec-settime reads a DNSSEC private key file and sets the key timing metadata as specified by the -P, -A, -R, -I, and -D options. The metadata can then be used by dnssec-signzone or other signing software to determine when a key is to be published, whether it should be used for signing a zone, etc. If none of these options is set on the command line, then dnssec-settime simply prints the key timing metadata already stored in the key. When key metadata fields are changed, both files of a key pair (Knnnn.+aaa+iiiii.key and Knnnn.+aaa+iiiii.private) are regenerated. Metadata fields are stored in the private file. A human-readable description of the metadata is also placed in comments in the key file. OPTIONS
-f Force an update of an old-format key with no metadata fields. Without this option, dnssec-settime will fail when attempting to update a legacy key. With this option, the key will be recreated in the new format, but with the original key data retained. The key's creation date will be set to the present time. -K directory Sets the directory in which the key files are to reside. -h Emit usage message and exit. -v level Sets the debugging level. -E engine Use the given OpenSSL engine. When compiled with PKCS#11 support it defaults to pkcs11; the empty name resets it to no engine. TIMING OPTIONS
Dates can be expressed in the format YYYYMMDD or YYYYMMDDHHMMSS. If the argument begins with a '+' or '-', it is interpreted as an offset from the present time. For convenience, if such an offset is followed by one of the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi', then the offset is computed in years (defined as 365 24-hour days, ignoring leap years), months (defined as 30 24-hour days), weeks, days, hours, or minutes, respectively. Without a suffix, the offset is computed in seconds. To unset a date, use 'none'. -P date/offset Sets the date on which a key is to be published to the zone. After that date, the key will be included in the zone but will not be used to sign it. -A date/offset Sets the date on which the key is to be activated. After that date, the key will be included in the zone and used to sign it. -R date/offset Sets the date on which the key is to be revoked. After that date, the key will be flagged as revoked. It will be included in the zone and will be used to sign it. -I date/offset Sets the date on which the key is to be retired. After that date, the key will still be included in the zone, but it will not be used to sign it. -D date/offset Sets the date on which the key is to be deleted. After that date, the key will no longer be included in the zone. (It may remain in the key repository, however.) PRINTING OPTIONS
dnssec-settime can also be used to print the timing metadata associated with a key. -u Print times in UNIX epoch format. -p C/P/A/R/I/D/all Print a specific metadata value or set of metadata values. The -p option may be followed by one or more of the following letters to indicate which value or values to print: C for the creation date, P for the publication date, A for the activation date, R for the revocation date, I for the inactivation date, or D for the deletion date. To print all of the metadata, use -p all. SEE ALSO
dnssec-keygen(8), dnssec-signzone(8), BIND 9 Administrator Reference Manual, RFC 5011. AUTHOR
Internet Systems Consortium COPYRIGHT
Copyright (C) 2009, 2010 Internet Systems Consortium, Inc. ("ISC") BIND9 July 15, 2009 DNSSEC-SETTIME(8)
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