shell scripting

[hari prasad_4]

Hi guys,

i need some help on shell scripting, currently i have written one script which take backup of some files and place it on one of the other partition with date and time stamp specified on the file name.

i want to know how to make retention period for the same.

shell script is given below

!#/bin/sh
FILENAME=`date +3dpl_lv0_%Y%m%d%H%M`
cp /essbdata1/levzerodata/lev03dpl.txt /essbdata1/back-hyp/${FILENAME}.txt
tar -cvf ${FILENAME}.tar ${FILENAME}.txt
gzip ${FILENAME}.tar

thanks in advance

[Kenan Erdey]

you can write and another script and which checks the period you specified, and delete archives which passsed retention time. then you can put it in cron.

[Peter Godron]

Hari,
if you want to keep the tar file for 28 days:

cd tar-directory
find . -mtime +28 -exec rm -f {} \;


This finds and removes ALL files which have not been modified in the last 28 days. This also includes any sub-directories.

see man find for more details

[Antonio Cardoso_1]

Hi,
You may use cp -p to preserve date and time of file modifications, and then use 'find -mtime ' to manage retention period.

HTH,
antonio.

[hari prasad_4]

hi,
if you check the file name, it has been given as year month date hour and minute.

So based on that i need to check the file name.

thanks

[Peter Godron]

Hari,
if you want to use the filename date, you could download a. Clay Stephensons caljd.sh
at http://mirrors.develooper.com/hpux/caljd-2.23.sh
and use the convert date to julian function.
Subtract the filename date from the current date and you would get the "age" of your file.

[hari prasad_4]

hi,

did you try this script can you let me know how this work, bcoz i need to implement those script in production and live servers

thanks

[Peter Godron]

Hari,
download the latest version caljd-2.25.sh from the same directory and save it as caljd.sh
caljd.sh -help for more help
For your example:
$ ./caljd.sh -y 2006 04 18
2453844
For example if the filedate was 2006 05 17
$ ./caljd.sh -y
2453843

then subtract one from the other and you have the difference in days between the current date and the filename date.

[hari prasad_4]

thanks for all of your help

[hari prasad_4]

..