crontab question


 
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# 1  
Old 10-04-2005
crontab question

Why does this cron entry do nothing? It works interactively.

58 23 * * * mydate=`date '+%Y%m%d'`;mv /opt/home/user/file /opt/home/user/file_$mydate
steelrose
# 2  
Old 10-04-2005
From the crontab man page:
Quote:
The sixth field of a line in a crontab file is a string that is executed by the shell at the specified times. A percent character in this field (unless escaped by \) is translated to a NEWLINE character.
# 3  
Old 10-04-2005
Just a personal preference, I consider it bad coding to define a variable in the crontab...

On occasion the crontab can be hacked, especially on the user level, and code like that can be modified more easily than it probably could be in a file protected by directory permissions.
# 4  
Old 10-04-2005
Regarding Unix shell internal

Hi

I want to know how UNIX shell works internally. Basically want to know how the shell differentiates between a normal file (it can be shell script or any other file) and an executable file?

Thanks in advance
-sg Smilie
# 5  
Old 10-04-2005
Go to our faq section and read: What does "#! /usr/bin/ksh" mean?
# 6  
Old 10-05-2005
Thank you Perderabo my doubt got cleared.
 
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