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Shell Programming and Scripting

Date command

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# 1  
Old 09-10-2012
Date command
Just writing a script as part of a backup procedure to use a data file 7 days previous if there has not been one sent over.

Got stuck on trying to get the date command to insert the date from 7 days ago i.e. todays date is 12/09/10 7 days ago would be 12/09/03

I would want the date command to insert 12/09/03
# 2  
Old 09-10-2012
Quote:
Originally Posted by 02JayJay02
Just writing a script as part of a backup procedure to use a data file 7 days previous if there has not been one sent over.

Got stuck on trying to get the date command to insert the date from 7 days ago i.e. todays date is 12/09/10 7 days ago would be 12/09/10
Try something like this..

Code:
$date --date="1 week ago"
Mon Sep  3 07:45:47 EDT 2012

$date -d'1 week ago' 
Mon Sep  3 07:46:05 EDT 2012

$date
Mon Sep 10 07:46:26 EDT 2012

This User Gave Thanks to pamu For This Post:
02JayJay02
# 3  
Old 09-10-2012
Above commands works if you have GNU Date command.. If you dont have GNU date then you might have to mess with TZ.. something like below Smilie

Code:
 
gold0813*TPCARCST-/wload/clht/home/clhtora>date
Mon 10 Sep 12:52:25 2012
gold0813*TPCARCST-/wload/clht/home/clhtora>echo $TZ
GMT0BST,M3.5.0/1,M10.5.0/2
gold0813*TPCARCST-/wload/clht/home/clhtora>TZ=TZ+168
gold0813*TPCARCST-/wload/clht/home/clhtora>date
Mon  3 Sep 11:52:34 2012

This User Gave Thanks to vidyadhar85 For This Post:
02JayJay02
# 4  
Old 09-10-2012
script doesn't seem to work, not sure why though, any idea? Smilie

Code:
 
#!/bin/bash
#A backup script if the default data file has not been sent over
#
EXTEN=.txt
VALID=VSL0120
DATE1=$(date +%y%m%d)
DATE2=000000
DATE3='TZ=GMT-168 $date +%y%m%d'
DIR=/apps/live/aahvanroutedata
#
if [ ! $DIR/VSL01_D* ]
#
then
touch /export/home/tjmoore/default_data_backup_email < "We have not rece
ived todays default data file from Alliance, the default data file has b
een used from the previous weeks same day"
#
cp $DIR/$VALID$DATE3$DATE2$EXTEN $DIR/$VALID$DATE1$DATE2$EXTEN 2&1 >>
/export/home/tjmoore/default_data_backup_email
#
/usr/local/bds/mailsend.s mailx "Backup Default Data File has been used"
<email address> j<email address> /export/home/tjmoore/de
fault_data_backup_email > 2&1>/dev/null
#
fi

Last edited by 02JayJay02; 09-10-2012 at 11:50 AM..
# 5  
Old 09-10-2012
Quote:
Originally Posted by 02JayJay02
script doesn't seem to work, not sure why though, any idea? Smilie
Any errors ??
# 6  
Old 09-10-2012
no errors are popping up, appreciate theres not a lot to work off, the file I try to create in the first section isnt being created either, just thinking does the test I do at the start mean if that file does not exist then carry on with the rest of the script?
# 7  
Old 09-10-2012
below 2 statements are at fault

Code:
 
DATE3='TZ=GMT-168 $date +%y%m%d'

TZ=TZ+168 to go back 7 days

Code:
 if [ ! $DIR/VSL01_D* ]

ir should be
Code:
 if [ ! -e ...... ]
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