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unique name on mv based on date?
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Original Message
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Name: jkeese
Date: August 26, 2003 at 20:01:43 Pacific
Subject: unique name on mv based on date?
OS: solaris8
CPU/Ram: 8g
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Comment: How would you do something like this:
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mv filename (date +%m%d%y_%M%S)
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So that the input filename would be given a unique name based on the date and time.
Thanks.
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Response Number 1
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Name: David Perry
Date: August 27, 2003 at 02:59:20 Pacific
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Reply: mv filename `date +%m%d%y_%M%S` This has a resolution of seconds and may not provide a unique name by itself. If this were part of a larger script with a loop it is very possible you would try to name several files the same name which would end up with files being overwritten and deleted. Also it is easier to sort on a date if the most significant value comes first. CCYYMMDD_H:M:S
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Response Number 2
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Name: jkeese
Date: August 27, 2003 at 07:06:02 Pacific
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Reply: Hi David,
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This will be a file that the user uploads to the system once per week. They can only upload one at a time, so 1 second will keep it unique. Your sort is a good idea.
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When I do this, I get a file named literally:
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date +%y%m%d_%H%M%S
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It does not get the date. I'm using the korn shell.
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Thanks, Jim.
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Response Number 3
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Name: David Perry
Date: August 27, 2003 at 07:30:54 Pacific
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Reply: Be certain to use the back ticks ( usually near the tilde character ) and not single quotes. mv filename `date +%Y%m%d_%T` The ksh also supports this form: mv filename $(date +%Y%m%d_%T) man strftime for more details.
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