[mysql] MySQL Error: : 'Access denied for user 'root'@'localhost'

For Ubuntu/Debian users

(may work on other distros especially debian based ones)

Run the following to connect as root (without any password)

sudo /usr/bin/mysql --defaults-file=/etc/mysql/debian.cnf

If you don't want to add --defaults-file each time you want to connect as root, you can copy /etc/mysql/debian.cnf into your home directory:

sudo cp /etc/mysql/debian.cnf ~/.my.cnf

and then:

sudo mysql

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