Compress and Dump all your MySQL databases

I wanted to backup all the MySQL databases I had to retire the actual server and then migrate to a newer server. I had about 50gig of data under /var/lib/mysql/.

How to find the amount of data a of folder have

du -sh /var/lib/mysql/

How to compress and dump all your databases on a MySQL server

# Backup and compress your MySQL databases
mysqldump -u root -h localhost -p --all-databases | gzip -9 > backup_dbs.sql.gz
# Unzip the file when you are ready to import it
gunzip backup_dbs.sql.gz


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