Backup MySQL users - mysql

Question

How do I backup MySQL users and their privileges?
Anything like mysqldump?
I am looking for something like:
mysqldump -d -u root -p MyTable > Schema.sql

Answer 1

mysql -BNe "select concat('\'',user,'\'#\'',host,'\'') from mysql.user where user != 'root'" | \
while read uh; do mysql -BNe "show grants for $uh" | sed 's/$/;/; s/\\\\/\\/g'; done > grants.sql

Answer 2

You can backup mysql database using
mysqldump -u root -p mysql > mysql.sql
and restore mysql database by executing
mysql -uroot -p mysql < mysql.sql
Dont forget to
FLUSH PRIVILEGES
after restoring dump.
Hope it helps...

Answer 3

So far my experience with MySQL i didn't see anything to backup user and their privileges through a command line.
But i can backup those critical data by backing up mysql
mysqldump -u root -p mysql > mysql.sql

Answer 4

Percona has a great tool for this. pt-show-grants will dump users and their permissions so you can easily reload them.
https://www.percona.com/doc/percona-toolkit/LATEST/pt-show-grants.html

Answer 5

The users and privileges are stored in the databased named 'mysql'. You can use mysqldump to backup the tables in the databased named 'mysql'.

Answer 6

Good practice is using script for daily backup MySQL users and their privileges.
Take take a look on a one:
#!/bin/sh
HOSTNAME="localhost"
mysql -h $HOSTNAME -B -N -e "SELECT CONCAT('\'', user,'\'#\'', host, '\'') FROM user WHERE user != 'debian-sys-maint' AND user != 'root' AND user != ''" mysql > mysql_all_users_$HOSTNAME.txt
while read line; do mysql -h $HOSTNAME -B -N -e "SHOW GRANTS FOR $line"; done < mysql_all_users_$HOSTNAME.txt > mysql_all_users_$HOSTNAME.sql
sed -i.bak 's/$/;/' mysql_all_users_$HOSTNAME.sql
rm mysql_all_users_$HOSTNAME.txt
rm mysql_all_users_$HOSTNAME.sql.bak
Result of this script will be mysqldump file with users and privileges.
P.S. If your MySQL requires password - put -p or -u username -p after mysql -h $HOSTNAME in two places.

Answer 7

The scripts given above give the general idea, but they're inefficient. They're forking/execing mysql n+1 times. It can be done in only two calls to mysql
mysql ${logininfo} -B -N -e "SELECT CONCAT('\'',user,'\'#\'',host,'\'') from user where user != 'root'" mysql | \
while read uh
do
echo "SHOW GRANTS FOR ${uh};"
done | mysql ${logininfo} -B -N | sed -e 's/$/;/' > ${outfile}
If there are users other than root that you don't want to backup use or and specify user != 'whatever' in the where clause of the first mysql call.

Answer 8

probably pretty obvious for mysql command liners but for #spirit's answer above had to add -u root -ppassword after both mysql commands
mysql -u root -ppassword -BNe "select concat(''',user,''#'',host,''') from mysql.user where user != 'root'" | while read uh; do mysql -u root -ppassword -BNe "show grants for $uh" | sed 's/$/;/; s/\\/\/g'; done > grants.sql;