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I currently backup a MySQL docker container using a shell script, it dumps the mysql file into a relative directory, such as..

set-e

TODAY=`date +"%d%b%Y"`

mysqldump -uroot -p"$MYSQL_ROOT_PASSWORD" -h $MYSQL_HOST --all-databases | gzip > /data/mysqldb/$TODAY/all-databases-$TODAY.sql.gz

I need to create a restore script that will read the $TODAY and determine which is most recent. How do I do this? :S

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  • If you're going to want to sort textual timestamps, better to use a format that is lexically ordered like %Y%m%d or numerically ordered like %s - or at least include delimiters so that you can use GNU sort's M month sort option for the %b. Aug 28 '19 at 15:06
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This is the approach i used. I have a working backup script with it.

CD into the backup DIR.

cd backup_dir && ls -t | head -n 2

-t -> sort by modification time, newest first

In a script:

LAST_2_BACKUPS=$(ls -t | head -n 2)
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  • Thanks! I was looking at this too but I was concerned if someone/thing modified something (renamed it for example) it might throw off the automated restore script.
    – jamesvree
    Aug 28 '19 at 14:01
  • why would you modify a backup? backups are supposed to be stored in a backup dir or s3 somewhere?
    – saviour123
    Aug 28 '19 at 14:05
  • you have atime and mtime as options too. cyberciti.biz/faq/howto-finding-files-by-date
    – saviour123
    Aug 28 '19 at 14:05

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