LinuxQuestions.org - Script programing

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Script programing

Ok I have a programming question.

I have 2 hard drives in my box which acts as a server. The first hard drive is running redhat 9 the 2nd has nothing on it. I want to write a script that will once a day make a folder on HD2 name it today’s date and copy all information from /home on it. Any ideas? Just a bit of background on this. The server is at a clients and they don’t want to pay for RAD or any kind of tape drive.

-AG

you could run something like this as cron job

Code:

#/bin/sh



cd /mnt/backup_drive

NEWDIR=`date +%d_%m_%g`

mkdir $NEWDIR

cp -pa /home/* $NEWDIR/

One minor note: use:

Code:

date -I

so the directories sort chronologically.

Lyle

Have you considered CVS?
It would save a ton of space by saving the changes rather than saving the entire directory structure each night?

I am sorry guys i was not quite as clear on this as i should have been. On top of copying /home into a backup directory on HD2 i would like it to have the old directorys deleted every 2 weeks. This way i can go back 2 weeks incase some one accadently saved changes to a file that they did not want to or some thing like that.

Here's something you can try. Be very careful with it because it uses rm -Rf at one point.

Code:

#!/bin/bash



#set -x



BACKUP_DIR=/home/lyle/empty/backups



DELETE_AFTER_DAYS=14



(

        if ! cd "$BACKUP_DIR" &> /dev/null

        then

                echo Could not change to $BACKUP_DIR.  Exiting.

                exit 1

        fi



        find -daystart -maxdepth 1 -type d -ctime +$DELETE_AFTER_DAYS -exec rm -Rf {} \;

)

I tested it with mtime in place of ctime in the find line because that's the only way I could test it short of creating one directory a day for 20 days and then testing it. I don't see a way to change the status change time with touch.

I use rdiff-backup; see http://rdiff-backup.stanford.edu/. I have a year's worth of backups. My home directory (today) is 1.2GB, one years worth of backups is 4.3GB, so it's pretty effecient disk-space wise. I'd recommend using that instead of the above script.

Lyle

Thanks, Lyle. I will give it a try and let you know how it worked.

-AG