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Top Forums UNIX for Beginners Questions & Answers Copy files in order of creation date Post 303004362 by officiallyme on Saturday 30th of September 2017 11:53:37 AM
Old 09-30-2017
There are some files that were created within seconds of each other. But most were created hours, days or months apart.
However, this does not seem to matter during the copying process because if I repeat the same command twice, the time of creation of the new files will differ.

So the same command gives different destination file order despite the same original files.

First run:
1
2
5
3
4
6

Second run:
2
3
1
5
6
4

But unlike the cp command, the ls always gives the same result for the original files.

That's why I was thinking of adding some kind of sleep command after each copied file because I'm guessing the problem is not the original sorting, but the speed of file creation. I just don't know how to do it.
 

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SLEEP(1)						    BSD General Commands Manual 						  SLEEP(1)

NAME
sleep -- suspend execution for an interval of time SYNOPSIS
sleep seconds DESCRIPTION
The sleep command suspends execution for a minimum of seconds. If the sleep command receives a signal, it takes the standard action. IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation. The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point). This is a non- portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system. EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)): (sleep 1800; sh command_file >& errors)& This incantation would wait a half hour before running the script command_file. (See the at(1) utility.) To reiteratively run a command (with the csh(1)): while (1) if (! -r zzz.rawdata) then sleep 300 else foreach i (`ls *.rawdata`) sleep 70 awk -f collapse_data $i >> results end break endif end The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done courteously by sleeping for 70 seconds in between each awk job. DIAGNOSTICS
The sleep utility exits 0 on success, and >0 if an error occurs. SEE ALSO
nanosleep(2), sleep(3) STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A sleep command appeared in Version 4 AT&T UNIX. BSD
April 18, 1994 BSD
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