Backup MySQL users and permissions

The Mysql user is in the table user of database Mysql, for backup this table you could do this :

mysqldump -u root -p mysql user > UserTableBackup.sql

For backup all database of mysql and create a file for each database you could do your own shell script, following some line of code that can help you :

    # Get all database list first
DBS="$($MYSQL -u $MyUSER -h $MyHOST -p$MyPASS -Bse 'show databases')"

echo `date +%Y%m%d_%H_%M_%S` - Backup Mysql Database Started >> /home/Backup/Backup.log 
for db in $DBS
do
    skipdb=-1
    if [ "$IGGY" != "" ];
    then
    for i in $IGGY
    do
        [ "$db" == "$i" ] && skipdb=1 || :
    done
    fi

    if [ "$skipdb" == "-1" ] ; then
    FILE="$MBD/$db.$HOST.$NOW.gz"
    # do all inone job in pipe,
    # connect to mysql using mysqldump for select mysql database
    # and pipe it out to gz file in backup dir :)
        echo `date +%Y%m%d_%H_%M_%S` - Backup "$db.$HOST.$NOW.gz" Started  >> /home/Backup/Backup.log
        $MYSQLDUMP -u $MyUSER -h $MyHOST -p$MyPASS --default-character-set=utf8 $db | $GZIP -9 > $FILE
        echo `date +%Y%m%d_%H_%M_%S` - Backup "$db.$HOST.$NOW.gz" Completed !  >> /home/Backup/Backup.log
    fi
done