
一、初始化报错问题:
1、/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --initialize (初始化)
./mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory (报错)
yum -y install numactl libaio(装这个,再初始化)
2019-03-15T18:39:35.762233Z 0 [ERROR] Fatal error: Can't change to run as user 'mysql' ; Please check that the user exists! 2019-03-15T18:39:35.762309Z 0 [ERROR] Aborting
上面这个报错,删除mysql里面的data目录下所有文件,和检查有没有创建mysql用户。
黑色部分是初始密码,要记住好登录。
安全启动:
./mysqld_safe --user=mysql & (要在mysql安装目录下的bin文件夹目录下)
这是显示启动成功了。
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) 报错
/usr/local/mysql/bin/mysqld_safe & (解决)
如果直接用 mysql -u root -p 报下面错误:
-bash: mysql: command not found (说明路径是错误的)
原因:这是由于系统默认会查找/usr/bin下的命令,如果这个命令不在这个目录下,当然会找不到命令,我们需要做的就是映射一个链接到/usr/bin目录下,相当于建立一个链接文件。
首先得知道mysql命令或mysqladmin命令的完整路径,比如mysql的路径是:/usr/local/mysql/bin/mysql,我们则可以这样执行命令:
# ln -s /usr/local/mysql/bin/mysql /usr/bin
二、启动报错
1、mysql启动出现"initialize specified but the data directory has files in it. Aborting"错误?
将目录/var/lib/mysql删除后重新启动即可 ,如果删不了,就用mv改名字。再重启
1 2 |
rm /var/lib/mysql service mysqld start |
2、 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
解决方法:(mysql5.7以上都有默认密码)
要找回默认密码:
grep "password" /var/log/mysqld.log 命令获取MySQL的临时密码
2019-02-20T03:41:59.553591Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: y.Jhr.udd2r>
y.Jhr.udd2r>(这是密码)
[root@lijibin bin]# mysql -u root -p
Enter password:
2019-02-22T20:14:17.003500Z 3 [Note] Access denied for user 'root'@'localhost' (using password: YES)
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) (密码错误)
Mysql –u root -p
Enter password: y.Jhr.udd2r> (输入密码登录)
mysql> ALTER USER USER() IDENTIFIED BY 'root123'; (修改密码)
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements(密码简单的报错。设置大小写加符号)
mysql> ALTER USER USER() IDENTIFIED BY 'Root123?';
Query OK, 0 rows affected (0.06 sec) (密码设置成功)