I need to backup a live sqlite db by running a command once a day. Only if the db file has changed since last backup. How could it be achieved on Centos 8 ?
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i missing the things you've already done and what youve been using, more over it looks to me not business related question . a cronjob that runs daily with no specific time can be started by `@daily command` using `crontab - e` – djdomi Mar 07 '21 at 17:39
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1why is it voted to close? how is it a cron script not part of server admin? – Boppity Bop Mar 09 '21 at 17:06
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The touch command has the ability to set a file's times to be the same as another file.
The BASH shell can test to see if one file is newer than another [ a -nt b ].
What you can do then is
- Set a reference file's times to be the same as your db file times using touch.
Then have a script run once per day that checks if the db file is newer than the reference file.
- If it is newer then update the reference file's times to be the same as the db file and backup the db file.
- Otherwise do nothing.
user620588
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2 lines script would bring a lot more information than 7 lines of natural language explanation :D – Boppity Bop Mar 08 '21 at 15:56
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1Doing it correctly is likely more than 2 lines. If I wrote the script for you, then you are not educated. – user620588 Mar 08 '21 at 16:00
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Depends on your attitude to learning I guess. I would find it a most excellent challenge :) – user620588 Mar 08 '21 at 16:45