mysql安装以后设置root账号和密码

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# cd /etc/mysql

sudo vim debian.cnf  一定要是sudo或者root账号权限打开，否则看不到内容

#Automatically generated for Debian scripts. DO NOT TOUCH!
[client]
host     = localhost
user     = debian-sys-maint
password = jj5pcggp3FD9zXaD
socket   = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host     = localhost
user     = debian-sys-maint
password = jj5pcggp3FD9zXaD
socket   = /var/run/mysqld/mysqld.sock
basedir  = /usr

复制账号和密码

# mysql -udebian-sys-maint -pjj5pcggp3FD9zXaD

Welcome to the MySQL monitor.  ....

# use mysql

#update user set password=password('root') where user='root';

Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0

# flush privileges

Query OK, 0 rows affected (0.00 sec)