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Cron Job help

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# 1  
Old 11-12-2010
Cron Job help
I need to write the cron job for the following scenario, Please help me out

The CRON job runs sometime at night on Saturday and checks if there are more than eight files in the /PROCESSED folder. Any files over and above eight are deleted based on ascending order of date (eight most recent files are retained).\

Thanks in Advance.
Sandeep Dwivedi PMP
# 2  
Old 11-12-2010
To be set in the crontab :
Code:
ls -t /PROCESSED/* | tail +9 | xargs rm

This User Gave Thanks to ctsgnb For This Post:
sandeep.dwivedi
# 3  
Old 11-12-2010
Command
Thanks

I get the below error message when I try to execute this command
______________________________________________
$ ls -t /home/sandeep/* | tail +9 | xargs rm
tail: cannot open `+9' for reading: No such file or directory
rm: missing operand
Try `rm --help' for more information.
# 4  
Old 11-12-2010
which OS are you running ?
tail doesn't have the "+" option ?
(i have tested it on my system and it worked : FreeBSD, the + option also exists on Solaris)
(if the tail fails, it is normal that the xargs rm fails)

Are you sur you currently have more than 8 files in your /home/sandeep ?

(you initially stated that the directory was /PROCESSED instead of /home/sandeep
Last edited by ctsgnb; 11-12-2010 at 08:59 AM..
This User Gave Thanks to ctsgnb For This Post:
sandeep.dwivedi
# 5  
Old 11-12-2010
+ option
The + option may not be available in all unix flavors. The + option takes from a line forward. Thus
Code:
file1=
a1
b2
c3
d4

command like the following
>tail -n +2 file1

gives
b2
c3
d4

Suggest your try the command syntax at your prompt. Also verify your default shell vs. the shell your script is running.
This User Gave Thanks to joeyg For This Post:
sandeep.dwivedi
# 6  
Old 11-12-2010
Ok then ...
Code:
ls -t /PROCESSED/* | tail -n +9 | xargs rm

This User Gave Thanks to ctsgnb For This Post:
sandeep.dwivedi
# 7  
Old 11-16-2010
Thanks
Tried running this command on anather UNIX machine
ls -t /PROCESSED/* | tail +9 | xargs rm
I get the following error message
usage:rm [-fiRr] file ...
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